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An alternative, low‐cost method to chill water for critical thermal minima trials J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-21 Jory Bartnicki; Richard A. Snow; Andrew T. Taylor; Christopher J. Butler
Water temperature is an important abiotic factor that impacts physiological processes in fish. Attempts to quantify thermal tolerance of fishes exposed to various temperatures have been performed since the 1800s. A common approach to test the thermal tolerance of fishes is the critical thermal method. Traditionally this method has required access to large and expensive lab equipment. However, many
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Molecular characterization and expression analysis of double‐stranded RNA‐dependent protein kinase (PKR) in Dabry’s sturgeon (Acipenser dabryanus) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-18 Huizhi Guo; Dunxue Chen; Hanwen Yuan; Dan Deng; Panpan Han; Qian Li; Qiaoqing Xu; Qiwei Wei
Protein kinase RNA‐activated (PKR) is an important component of the innate immune system induced by interferon. This antiviral protein senses a variety of stresses and pathogen‐driven double‐stranded RNAs (dsRNAs). In the present study, we cloned and characterized the PKR gene from Dabry's sturgeon (Acipenser dabryanus). Bioinformatics analysis revealed that the AdPKR gene comprises a coding sequence
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Common carp (Cyprinus carpio L.) scales as a bioindicator reflecting its exposure to heavy metals throughout life J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-05 Ewa Łuszczek‐Trojnar; Patryk Nowacki
The aim of the present study was to demonstrate the usefulness of fish scales as a bioindicator reflecting the concentrations of heavy metals in the environment as compared to typical recognized bioindicators such as the liver or kidney. Heavy metal (Zn, Mn, Cu, Cd, Fe, Ni, Pb) concentration analysis (with the atomic absorption technique) was performed in different annuli on the fish scale to characterize
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Assessment of exploited fish species in the Lake Edward System, East Africa J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-05 Laban Musinguzi; Samuel Bassa; Vianny Natugonza; Maarten Van Steenberge; William Okello; Jos Snoeks; Rainer Froese
The unknown status of inland fish stocks hinders their sustainable management. Therefore, increasing stock status information is important for sustainable inland fisheries. Fisheries reference points were estimated for five exploited fish species (11 stocks) in the Lake Edward system, East Africa, which is one of the most productive inland water systems. The aim was to ascertain the status of the fisheries
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Length–weight relationships of five selected demersal fishes from the Cabo Verde Islands (eastern‐central Atlantic) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-04 José A. González; Raül Triay‐Portella; Sandra Correia; Albertino Martins; Gustavo González‐Lorenzo; José M. Lorenzo; José G. Pajuelo
The length–weight relationships (LWR) were estimated for five selected demersal marine fishes from the relatively undisturbed shelves and slopes of the Cabo Verde Islands. Most of them were of ecological and/or commercial interest. Occasional sampling was carried out during different fisheries research projects. LWRs were taken for the following bycatch species for which no such estimates exists in
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Fertility of females of sturgeon hybrids obtained from species with different levels of ploidy (Acipenser ruthenus and A. dauricus) and their cloning J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-04 Victor P. Vasil'ev; Evgeniy I. Rachek; Dmitriy Yu. Amvrosov; Anna E. Barmintseva; Ekaterina D. Vasil'eva
Main purpose of this work is the identification of females of artificial sturgeon hybrids capable to produce unreduced oocytes. The importance of this task is due to the ability to receive clonal all‐female lines. Experiments were performed on the previously obtained reciprocal hybrids of sterlet, Acipenser ruthenus (S) with ~120 chromosomes and kaluga, Acipenser dauricus (K) with ~260 chromosomes
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Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus Mitchill, 1815) early life stage consumption evidenced by high‐throughput DNA sequencing J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-04 Aaron J. Bunch; Kara B. Carlson; Frederick J. Hoogakker; Louis V. Plough; Heather K. Evans
Predation on early life stages of Atlantic Sturgeon Acipenser oxyrinchus oxyrinchus (ATS) may be a constraint to species recovery. Due to the difficulty in assessing consumption of early life stages with traditional diet analysis methods, we pursued an alternative DNA‐based approach. We extracted total gut content from gastrointestinal tracts of 23 fish species (593 samples) within the tidal‐fresh
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Length‐weight relationships of six Nemacheilid fish species (Teleostei: Cypriniformes) from different rivers of Manipur, India J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-03 Sukham Munilkumar; Yumnam Rameshori; W. Romen Mangang; Makamguang Kamei; Yengkhom Chinglemba; Annam Pavan‐Kumar; Bijay Kali Mahapatra; Arabinda Das; Md. Abu Hanif; Muhammad Abu Bakar Siddik
The length‐weight relationships (LWRs) of six Nemacheilid species (Schistura chindwinica, S. fasciata, S. khugae, S. minuta, S. reticulata and S. rubrimaculata) have been analyzed. Fish samples were collected on quarterly basis from March 2018 to February 2019. Sampling was performed using cast nets (mesh size 5–10 mm; about 50 sq m area covered each time and water depth was 4 ft approx.), and electrofishing
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Morphological variations among four riverine populations (Bangladesh) of endangered catfish Rita rita (Hamilton, 1822) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-03 Muhammad Forhad Ali; Md. Mostafa Kamal; Md. Rafiqul Islam Sarder; Mohammad Matiur Rahman; Md. Fazlul Awal Mollah
The morphological variation of the endangered catfish Rita rita was studied based on meristic, length–weight relationship (LWR), traditional (TRA) and truss (TRU) distance based morphometric analysis of 200 juveniles collected from the Old Brahmaputra, Jamuna, Meghna and Kangsa rivers. Data were subjected to Kruskal–Wallis test for meristic counts, t test for LWR, univariate ANOVA, multivariate discriminant
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Morphological and Genetic variations in the natural populations of Carinotetraodon travancoricus J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-03 Deepak Jose; Harikrishnan Mahadevan; Anupama Kalathil Mukundan
Carinotetraodon travancoricus or Malabar puffer fish is an endemic species described from rivers originating from the Western Ghats in South India. This species is captured extensively as an aquarium fish and is having substantial demand in global markets. However, being prone to overfishing and impacts of anthropogenic alterations in its habitats, IUCN has categorized it as a threatened/vulnerable
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Novel polymorphisms in Stearoyl‐CoA Desaturase (SCD) and Fatty Acid Desaturase 2 (FADS2) in channel catfish (Ictalurus punctatus, Rafinesque, 1880) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2021-01-01 Oliva Mendoza‐Pacheco; Gaspar Manuel Parra‐Bracamonte; Xochitl Fabiola De la Rosa‐Reyna; Ana María Sifuentes‐Rincón; Isidro Otoniel Montelongo‐Alfaro; Ana Laura Lara‐Rivera
The Channel catfish is one of the most important freshwater fish species in North America. Conventionally their selection for genetic improvement is focused in growth related traits but not on quality traits as flavor and fatty acid deposition. The aim of this study was the sequencing of Stearoyl‐CoA Desaturase (SCD) and Fatty Acid Desaturase 2 (FADS2) genes, two of main genes in the biosynthesis of
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Fin‐spines attachment, a novel external attachment method for the ultrasonic transmitters on hard fin‐spines fish (Sparidae) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-30 Shaoliang Lyu; Kun Lin; Jiawei Zeng; Yuxi Liu; Zhijie Chen; Xuefeng Wang
The purpose of this study was to develop a novel method for the external attachment of ultrasonic transmitters on hard fin‐spines fish (Sparidae). Acanthopagrus latus, one of the main stocking Sparidae fishes in the northern South China Sea, was employed to conduct the 40‐day tank experiment by using dummy ultrasonic transmitters. The experiment consisted of 3 treatment groups, i.e., drilling on dorsal
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Length‐weight relationships of 10 fish species from the coastal waters of the East China Sea J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-30 Dongyan Han; Qiuyun Ma; Kindong Richard; Chunxia Gao
The present study provides the length‐weight relationships (LWRs) for 10 marine fish species collected from the coastal waters of the East China Sea by bottom trawl surveys. The open width of the sampling net was 40 m and the mesh size of the codend was 20 mm. Specimens were collected from November 2015 to November 2019 at seasonal intervals. The measurement accuracy of weight and length were 0.1 grams
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Early embryonic development of the vulnerable Shalyni barb, Pethia shalynius (Yazdani & Talukdar, 1975) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-30 Jayanta Kumar Nath; Minakshi Kalita; Anu Saikia; Hrishikesh Choudhury; D. Khlur B. Mukhim; Dandadhar Sarma
The present study provides the first detailed early embryonic development of the Shalyni barb, Pethia shalynius (Yazdani & Talukdar, 1975), a vulnerable cyprinid fish occurring in streams and lentic waters of Meghalaya, northeast India. Induced spawning by synthetic hormone injection in May 2019 was conducted to a pair of mature female and male P. shalynius under controlled conditions in a well‐aerated
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Demersal fish assemblages on seamounts exploited by fishing in the Azores (NE Atlantic) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-30 Régis Santos; Wendell Medeiros‐Leal; Ana Novoa‐Pabon; Hélder Silva; Mário Pinho
Seamount fish communities are susceptible to variations due to the oceanographic conditions and level of historical fishing effort. In the NE Atlantic, the Azores is considered an “oceanic seamount ecosystem area” because seamount concentration is high relative to other regions. Scientific information on seamounts in the Azores remains scarce and demersal fishery occurs mostly without any knowledge
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Length‐weight relationships of fish species from the Stung Russei Chrum River basin, Kingdom of Cambodia J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-29 Long Zhu; Xue Xue; Guo Zhang; Zaizhao Wang
This study evaluated the length‐weight relationships (LWRs) for three teleost fish species sampled from the Stung Russei Chrum River basin, Kingdom of Cambodia. The fish were collected during two dry seasons (April 2019 and November 2019) and one rainy season (October 2018) using monofilament trammel nets (2–12 cm mesh size), cast net (mesh size 2 cm) and scoop‐nets (mesh size with 0.3 cm). Results
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Development and characterization of 33 polymorphic microsatellite markers in Trachurus japonicus by SLAF‐seq technology J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-29 Su‐Fang Niu; Yun Zhai; Ren‐Xie Wu; Zhen‐Bang Liang; Hao‐Ran Zhang; Zhong‐Lu Li; Qi Qiu; Ling‐Li Zhou
Trachurus japonicus is an economically important fish in the northwestern Pacific Ocean. However, its resources have declined seriously and there is an urgent need for a wide‐range of investigations of the existing genetic resources. This requires a large number of diverse molecular markers with high discriminating power. In this study, we identified 43,264 perfect SSRs in T. japonicus genome using
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Cryopreservation of Chirostoma jordani sperm, fish model for the conservation of the genus in Mexico J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-29 Jesús Dámaso Bustamante‐González; Martha Rodríguez‐Gutiérrez; Araceli Cortés‐García; Edith Arenas‐Ríos; Gerardo Figueroa‐Lucero; Alejandro Ávalos‐Rodríguez
Genus Chirostoma belongs to Atherinopsidae family and it is an endemic species from the Mesa Central in Mexico. Abundance of its species have decreased and some ones have been placed on the threatened species list, because of overfishing, urbanization, industrialization, destruction, habitat fragmentation, pollution and exotic species introduction. Chirostoma jordani (Woolman, 1894) is a freshwater
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Growth characteristics of Uranoscopus scaber Linnaeus 1758, inhabiting the Iskenderun Bay (Northeastern Mediterranean) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Nuri Başusta; Mustafa M. Özmen
This study aimed to determine the age and some growth characteristics of Atlantic stargazer (Uranoscopus scaber) from Iskenderun Bay (Northeastern Mediterranean). For this purpose, a total of 150 Atlantic stargazer ranging in size from 9.1 to 28.0 cm in total length (weight: 11.7–345.7 g) were collected as by‐catch from a commercial trawl fishing boat at a depth of 80–100 m between May 2015 and January
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Age and growth of the blackchin guitarfish Glaucostegus cemiculus (Geoffroy Saint‐Hilaire, 1817) from Iskenderun Bay (Northeastern Mediterranean) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Nuri Başusta; Asiye Başusta; Eyüp Mümtaz Tıraşın; James A. Sulikowski
Between September 2010 and June 2012, a total 291 (166 females and 125 males) blackchin guitarfish Glaucostegus cemiculus were captured by a commercial bottom trawler (F/V Coşkun Reis) in Iskenderun Bay, Turkey (northeastern Mediterranean Sea). The total length (L) and total weight (W) of the female and male guitarfish ranged between 32.0–165.0 cm and 88 g–16.68 kg, and 34.3–128.3 cm and 112 g–6.00 kg
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The relationships between fish size and otolith dimensions in the common sole (Solea solea (Linnaeus, 1758)) captured in the Northeastern Mediterranean J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Asiye Başusta; Burak Çetinkaya; Nuri Başusta
Fish specimens were captured by a commercial bottom trawler at a depth of 50–80 m from Iskenderun Bay (Hatay, Turkey) between December 2017 and May 2018. The bottom trawl gear used was equipped with a 44 mm stretched mesh size net at the cod‐end. Blind side and eyed side otolith lengths (OL), otolith breadths (OB) and otolith weights (OW) were measured from each specimen to the nearest 0.001 mm and
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Hook selectivity and catch efficiency in two sport fishing sectors in the Strait of Istanbul, Turkey: Classic handline fishing and Light Rock Fishing (LRF) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Murat Peksu; Uğur Uzer; Taner Yildiz; Adnan Ayaz; F. Saadet Karakulak
In this study, the efficiency of two fishing methods (a) traditional handline commonly used in the Strait of Istanbul and (b) light rock fishing (LRF), which is beginning to spread in recent years, were investigated by monthly sampling between September 2014 and September 2015. One classic handline fishing tackle and one LRF fishing tackle were used in the test fishing exercise. In addition, the effects
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Differences in proximate lipid composition, heavy metals, and mineral contents in bogue (Boops boops, Linnaueus, 1758) captured far away and directly at sea bass and sea bream cage farms J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Ayse Ozyilmaz; Ibrahim Miçooğulları
The objective of this study was to investigate the differences in proximate lipid composition, heavy metals, and mineral contents between bogue (Boops boops, Linnaeus, 1758) captured directly around and near a cage fish farm and those captured far away from it (“wild”). Wild fish were obtained from the fishery of the Aegean Sea and Northeastern Mediterranean. Fish were also caught at a distance of
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Nutritional Composition and heavy Metal Concentrations in Sardinella maderensis (Lowe, 1838) obtained from the Mauritanian fisheries J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Nuray Erkan; İdil Can Tunçelli; Özkan Özden; Serdar Üren
This study attempts to delineate the nutritional value and potential problem of toxic metal contamination in Sardinella maderensis (Lowe,1838) originating from Mauritanian fishery destined for regional common human consumption. Samples caught in Mauritania were delivered to Turkey by ship in 22 days in cold storage. Amino acids, fatty acids and toxic metal analyses of the samples were carried out by
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Heavy metal risk assessment of European eels (Anguilla anguilla, Linnaeus, 1758) from the Asi (Orontes) River, Turkey J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Özkan Özden; İdil Can Tunçelli; Işık Kemal Oray; Muammer Kaplan; Seyfettin Parıldar; Nuray Erkan
The muscle tissues of a total 154 sampled eels from the Asi (Orontes) River were analyzed between January and December 2018 to determine the content of heavy metals (Hg, Pb, Cd and As). Determination of heavy metals in muscle tissue was carried out with an Inductively Coupled Plasma Mass Spectrometer (ICP‐MS). To express the risk level for human consumption of heavy metal contaminated eels we used
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Biological parameters and current status of European eel (Anguilla anguilla Linnaeus, 1758) from Asi River, Northeastern Mediterranean region, Turkey J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Sevil Demirci; Özkan Akar; Emrah Şimşek; Aydın Demirci; Şükran Yalçın Özdilek
The biological characteristics of eels from the Asi River, Turkey, were assessed between December 2017 and November 2018. Eels were sampled monthly using fyke nets (operated by professional fishermen), yielding a total of 509 specimens. Total length and weight were measured, sex, age and maturity stages (silver or yellow eel) were determined. Catch Per Unit Effort (CPUE) was calculated for both biomass
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Assessment of The Annual European eel (Anguilla Anguilla Linnaeus, 1758) Catches In Three Suggested Major Monitoring areas To Support The development of eel fishery management system In Turkey J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Şükran Yalçin Özdilek; Hasan G. Özdilek
Thirteen river basins draining into the Marmara, Aegean and Mediterranean Seas were selected for evaluation of European eel (Anguilla Anguilla L., 1758) catch in Turkey. These basins were grouped into three so‐called “eel monitoring area” (EMA). The official province‐based annual landing data between 1996 and 2018 were assessed for each of the monitoring areas. Statistically significant decreases over
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An initial survey on the occurrence of staphylococcal infections in Turkish marine aquaculture (2013–1014) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Özgür Çanak; Gülşen Timur
A tentative survey on selected marine fish farms was undertaken to delineate the extent to which infections with Staphylococcus species occur in Turkish aquaculture systems. To determine the presence and the distribution of fish pathogenic staphylococci, representative farm types such as marine cages as well as inland pond farms working with saline‐ground water and a large hatchery were selected. Field
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Histopathology Characteristics of two Different Benign Tumours in Capoeta capoeta J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Tulay Akayli; Cigdem Urku; Erol Rustu Bozkurt
The aim of the present study was to determine the morphologic and histopathologic characteristics of tumors observed in samples from moribund Capoeta capoeta. For this purpose, ten fish, captured from the Fırat River located in southeastern Anatolia of Turkey, were examined for gross malformations and histopathological morphology. Externally, two different morphological types of tumours were detected
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Distribution of deformities among cultured Sparus aurata marketed in Istanbul, Turkey J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 Sibel Özesen Çolak; Özgür Çanak
Deformities/anomalies in fish body shapes have important implications on the marketability of the fish and thus can affect particularly the consumer perception of aquaculture‐produced fish, raising concerns on animal welfare. The aim of this study was to detect the distribution of deformities in cultivated Sparus aurata that were raised to market size and sold in Istanbul Gürpınar Wholesale Fish Market
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First record of the Lessepsian fish Siganus rivulatus (Forsskål & Niebuhr, 1775) in the Sea of Marmara (Izmit Bay, Turkey) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-12-20 F. Saadet Karakulak; Taner Yildiz; Uğur Uzer; Isik K. Oray
The marbled spinefoot, Siganus rivulatus (Forsskål&Niebuhr, 1775) was recorded for the first time in Izmit Bay, Sea of Marmara. One specimen was caught on 30 September 2019 by a small scale fisherman at depth of 25 m. The fish measured 151 mm in total length and weighted of 43.45 g. S. rivulatus is one of the Lessepsian immigrants who entered the Mediterranean more than half a century ago, and has
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Morphological and genetic diversity of Sabanejewia balcanica (Cobitidae, Actinopterygii) in Bosnia and Herzegovina J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-11-26 Alen Bajrić; Ivana Buj; Avdul Adrović; Edina Hajdarević
Taxonomic position of the Balkan spined loach, Sabanejewia balcanica (Karaman, 1922) is still uncertain. There are pronounced differences in morphological characters among individuals from different populations, which led to description of various populations as species, subspecies and clinal variation. In this investigation we aimed to describe morphological and genetic diversity of S. balcanica in
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Length‐weight relationships of eight fish species from the Hailang river, China J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-11-17 Xue Du; Dan Song; Huibo Wang; Xiaoli Huang; Hui Liu; Tangbin Huo
The present study reports the length‐weight relationships (LWRs) for eight fish species sampled in Hailang River, a left‐bank tributary of the Mudan River in Northeast China. The fishes were collected from April to October bimonthly 2017 by electrofishing (fishing 2 kilometers along the river and within 5 meters from the bank) and netting (drift gillnet: mesh size 2 cm × 3 cm; 200 m net length). The
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Genetic diversity of mitochondrial D‐LOOP sequences in the spotted scat (Scatophagus argus) from different geographical populations along the northern coast of the South China Sea J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-11-16 Min Peng; Weilin Zhu; Chunling Yang; Jiuxiang Yao; Huifang Chen; Weiming Jiang; Zhenhan He; Qiangyong Li; Qingyun Liu; Yongzhen Zhao; Yong Lin; Xiaohan Chen; Digang Zeng; Xiuli Chen
The genetic diversity of 289 spotted scat (Scatophagus argus) from seven populations along the northern coast of the South China Sea was studied by analyzing the full‐length sequences of the mitochondrial control region (D‐LOOP). The S. argus D‐LOOP sequence was 1,004–1,010 bp long and contained 156 variant sites. The seven studied S. argus populations had a high degree of genetic diversity (haplotype
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Establishment and application of a microsatellite‐based parentage identification method for Oreochromis niloticus, O. aureus, and O. niloticus × O. aureus J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-11-12 Zhigang Liu; Jianmeng Cao; Maixin Lu; Fengying Gao; Xiaoli Ke; Miao Wang; Mengmeng Yi
In genetic fish breeding research, clear pedigree information is of great significance for breeding and parental management. In order to establish a stable, highly accurate, and widely applicable parentage identification method for tilapia, 13 highly polymorphic microsatellite loci within populations of Oreochromis niloticus, O. aureus, O. niloticus × O. aureus, and their mixed population were screened
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Early development of the endemic dace Telestes karsticus (Leuciscidae, Cypriniformes) in a Dinaric karst stream in Croatia J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-11-08 Zoran Marčić; Ana Abramović; Marko Ćaleta; Ivana Buj; Davor Zanella; Sven Horvatić; Perica Mustafić
Early development of the endemic dace Telestes karsticus is described in a Dinaric karst stream in Croatia. Larvae were acquired from successful rearing in an aquarium. Basic morphometric and meristic measures of larvae were taken during 55 days of observation. The mean total length of larvae at the time of hatching was 6.45 mm. The yolk sac was completely absorbed in all larvae by day 9 post‐hatching
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Length‐weight relationships for seven endemic fish species from streams of the last two large remaining dam‐free tributaries of the Upper Paraná River Floodplain in the Paraná State, Brazil J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-11-04 Augusto Frota; Maria J. M. Ganassin; Weferson J. da Graça
This study reports the length‐weight relationships (LWR) for seven endemic fish species from streams in the Ivaí (Characidium heirmostigmata, Corydoras lacrimostigmata, Curculionichthys oliveirai, Hisonotus pachysarkos, and Cambeva horacioi) and Ivaí and Piquiri (Apareiodon vladii and Planaltina kaingang) River basins, Paraná State, Brazil. Fish specimens measured and weighed were collected between
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Ovarian dynamics and fecundity regulation in blueback herring, Alosa aestivalis, from the Connecticut River, US J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-11-04 Foivos A. Mouchlianitis; Eric T. Schultz; Thassya C. dos Santos Schmidt; Justin P. Davis; Kostas Ganias
We analyzed ovarian dynamics of anadromous blueback herring, Alosa aestivalis, in Connecticut River with the principal aim of exploring oocyte recruitment and how it shapes the fecundity pattern. We examined the oocyte release strategy and analyzed spawning cyclicity by linking oocyte growth to the degeneration of postovulatory follicles. Females were accordingly classified as pre‐spawners, early and
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Migration and distribution of adult hatchery reared Yangtze sturgeons (Acipenser dabryanus) after releasing in the upper Yangtze River and its implications for stock enhancement J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-11-01 Junyi Li; Chengyou Wang; Weiwang Pan; Hao Du; Hui Zhang; Jinming Wu; Qiwei Wei
The Yangtze sturgeon (Acipenser dabryanus) is a most important aquatic animal at the national level. Influenced by human activities such as dam constructions and overfishing, its natural population in the wild has almost disappeared. Since 2000, its natural reproduction has not been detected. In May 2018, in the Yibin reaches of the upper Yangtze River, 40 adult hatchery reared Yangtze sturgeons with
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A new species in town: New record of Hexanchus nakamurai Teng, 1962 from the Levantine Sea J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-11-01 Elizabeth G. T. Bengil; Hasan D. Akbora; Louis Hadjioannou; Marios Papageorgiou; Robin Snape
Hexanchus nakamurai is a deep‐water species, with very little scientific information. This study confirms the distribution of the species in the most eastern region of the Mediterranean Sea, Levantine Sea, in addition to providing some biological information from four pregnant individuals, which is being reported for the first time in the Mediterranean Sea. A total of four individuals were bycaught
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Length‐weight and length‐length relationships of three fish species from the Qingshui River in Guizhou province, Southwest China J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-10-30 Xiufang Zhu; Qi Mi
The present study describes the length‐weight (LWR) and length‐length (LLR) relationships for three indigenous fish species from the Qingshui River, southwestern China. Fishes were collected by electrofishing in May 2015 in the middle Qingshui River. Total length (TL), standard length (SL) and fork length (FL) were measured to the nearest 0.1 cm with a digital calliper and weight (W) was determined
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Length–weight and otolith size to standard length relationships in 12 species of Southern Ocean Myctophidae: A tool for predator diet studies J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-10-26 Ryan A. Saunders; Silvia Lourenço; Rui P. Vieira; Martin A. Collins; Jose C. Xavier
Fish morphometric relationships are key tools for fisheries science and studies of food web dynamics and predator foraging behaviour, but parameterisations are limited for Southern Ocean myctophids (Family Myctophidae). New standard length (LS) to total mass (MT) relationships are therefore described for the 12 biomass‐dominant myctophid fish species living in the Scotia Sea, Southern Ocean, using
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Plitvice Lakes National park harbors ancient, yet endangered diversity of trout (genus Salmo) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-10-18 Ivana Buj; Lucija Raguž; Zoran Marčić; Marko Ćaleta; Aljoša Duplić; Davor Zanella; Perica Mustafić; Lucija Ivić; Sven Horvatić; Roman Karlović
National park Plitvice Lakes is the oldest, the largest and the most visited national park in Croatia, well known for its stunning karstic watersheds that supply Plitvice Lakes and exceptionally valuable biodiversity. Lack of knowledge on the taxonomic status, population structure and viability of trout in the Plitvice Lakes National park, as well as the possibility of existence of cryptic diversity
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Comparative feeding strategies of yellowfin tuna around St Helena and adjacent seamounts of the South Atlantic Ocean J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-10-18 Vladimir Laptikhovsky; Joachim Naulaerts; Elizabeth Clingham; Martin A. Collins; Martin Cranfield; Leeann Henry; Alison Small; Tammy Stamford; Jose Xavier; Serena Wright
Yellowfin tuna are the mainstay of the traditional tuna fisheries in St Helena waters, but there is limited knowledge of their ecology and feeding behaviour in the area. In this study yellowfin tuna stomach contents were used to assess spatio‐temporal changes in feeding strategy and consider the role of tuna in the local ecosystem. Comparisons of the feeding spectra of yellowfin tuna between inshore
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Age, growth, and fishery assessment of spotted sand bass in the Northern Gulf of California, Mexico J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-10-18 Steven M. Sammons
Spotted sand bass (Paralabrax maculatofasciatus) is one of the most common inshore reef fishes in the northern Gulf of California (GOC), Mexico, but has rarely been studied. Objectives of this study were to estimate age and growth parameters of this species from two areas in the northern GOC and use an age‐structured model to assess fishery yield and Spawning Potential Ratio (SPR) over a wide range
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Length–weight relationships of four fish species from Vembanad‐Kole Wetland (Kerala, India) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-10-11 Kuttanelloor Roshni; Chelapurath Radhakrishnan Renjithkumar
The length–weight relationships (LWRs) of four fish species were determined from Vembanad‐Kole Wetland, Kerala, India between June 2015 and May 2016. Fish samples were collected monthly from various fishing gears such as gill nets (50 m long and 1.5 m height, mesh sizes 30–100 mm, soaking time 8 hr) and seine nets (mesh sizes 8–16 mm). Values of the parameter b ranged from 2.896 to 3.165 and such values
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Length–weight relationships of six fish species from mangroves of Qinzhou Harbor, Southern China J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-10-11 Hao Liu; Delian Huang; Xin Huang; Liangliang Huang; Yuequn Huang; Zhiqiang Wu
The length–weight relationships (LWRs) for six species were estimated. Fish were captured in the mangroves of Qinzhou Harbour, China, but also some specimens were purchased from fishermen. The sampling was undertaken monthly between May 2011 and April 2012 using seines (mesh size 5–10 mm; height 4 m; length 400 m) and traps (mesh size 8.5 mm; 35 cm2 × 10 m for one unit) at seven sampling sites. Standard
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Effect of different calcium concentration on sperm motility and fertilisation capacity of rainbow trout (Oncorhynchus mykiss) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-10-08 Leydy Sandoval‐Vargas; Elías Figueroa Villalobos; Pablo Contreras; Francisco Estay; Iván Valdebenito Isler
Calcium is a prerequisite factor for triggering the sperm activation in salmonids. The aim of this study was to test different concentrations of Ca2+ on sperm motility activation and fertility of rainbow trout (Oncorhynchus mykiss). Semen samples activated with calcium free activator (0.0 mM) and increasing concentrations of CaCl2 (6.3, 7.9, 9.5 and 11 Mm) were evaluated by computer‐assisted sperm
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Length‐weight relationships of five fish species from Brazilian Amazon coast hotspot estuaries J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-10-09 Louise Thuane Barreto Lima; Marcelo Moreira de Carvalho; Mônica Rocha de Oliveira; Jorge Luiz Silva Nunes
The length‐weight relationships (LWR) were estimated for five fish species from the Golfão Maranhense, Brazilian Amazon littoral region. Samplings were performed in August 2016, during the dry season, using trawl net with 6.0 m length by 3.0 m width (trawl mouth opening of 6.0 m2) and 1.0 cm mesh size between opposite knots. This study registers LWR for Anchoviella elongata and Gobioides broussonnetii
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Spatiotemporal changes in juvenile lake sturgeon abundance in a large river J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-30 Tim Haxton; Mike Friday
Monitoring trends in a long‐lived species such as lake sturgeon (Acipenser fulvescens) has it challenges. Targeting the correct life stage to monitor can provide different and contrasting results. Early life stages experience high variable mortality and are often not a good predictor of population trend. Juvenile lake sturgeon (i.e., 5–10 years) experience high survival and could be a good life stage
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Influence of prey condition and incubation method on mortality, growth and metabolic rate during early life history in lake sturgeon, Acipenser fulvescens J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-28 G. R. Yoon; D. Deslauriers; W. G. Anderson
Environmental conditions during early life can have a profound impact on developmental trajectory and ultimately ecological fitness of individuals. Therefore, from a conservation perspective it is vital to understand the longer‐term implications of early phenotypic development on survival. In this study, we examined the effects of temperature (maintained at 16°C or ambient river temperature), prey
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Ontogenetic structure and distribution patterns of ichthyoplankton in the confluence zone of two river systems in the Eastern Amazon J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-28 R. A. Cajado; L. S. de Oliveira; F. K. S. da Silva; D. M. Zacardi
The ontogenetic structure and longitudinal variability of ichthyoplankton in a confluence zone of two river systems in the Eastern Amazon were evaluated between December 2018 and April 2019, at the time 137 eggs and 7,687 larvae of fish were captured. Ichthyoplankton proved to be heterogeneous between sections of rivers with differences in the number of taxa and abundance. The assemblages were distinguished
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Length‐weight relationship of 16 fish species from the Negro River basin (Amazonas state, Brazil) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-26 C. C. F. Lubich; J. Aguiar‐Santos; C. E. C. Freitas; F. K. Siqueira‐Souza
This study aimed to estimate the parameters of length‐weight relationship for 16 freshwater fish species that inhabit the Aracá and Demeni Rivers, which are two tributaries of the Negro River (Amazonas state, Brazil). The fishes were sampled using gillnets (15 × 2 m, mesh size 30–120 mm between opposite knots), during 6 days each year, in April 2016, November 2018 and April 2019. The gillnets were
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Effect of repeated exercise fatigue on the swimming performance of juvenile rock carp (Procypris rabaudi, Tchang) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-26 Ying‐ping Huang; Ali Haris Malik; Zhi‐ying Tu; David Johnson; Wei‐Ming Li; Xi Yuan
The swimming performance of juvenile rock carp (Procypris rabaudi, Tchang) subjected to repeated fatigue exercise was studied using a flume‐type respirometer at 20°C. The critical swimming speed (Ucrit) and oxygen consumption rate (MO2) of juvenile rock carp were measured during two successive stepped velocity tests, following a 60 min rest interval. Ucrit of rock carp was giving a recovery ratio (Rr)
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Length‐weight relationship of 74 fish species caught in the continental coast of Ecuador J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-23 D. Coello; M. Herrera; R. Zambrano
This work analysis the length‐weight relationships for fish species captured by artisanal fishery along the continental coast of Ecuador. Fishermen used the following fishing gear: beach seine nets (5.1–31.8 mm), shrimp trawl nets (21.8–31.8 mm) and bottom gill nets (54.1–203.2 mm). Sampling took place during the years 2012 and 2014. Frequency of sampling was monthly, and it was completed systematically
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Length‐weight relationship of fish species captured around an artificial offshore reef (northern Rio de Janeiro, Brazil) J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-21 Juliano Silva Lima; Igor David da Costa; Ilana Rosental Zalmon
The present work provides length‐weight relationships (LWRs) for fish species captured around artificial offshore reef deployed 5 km from Guaxindiba Port, northern Rio de Janeiro, Brazil. The fish were captured during two sampling periods each year between 1996 and 2017 using bottom gill nets (25 mlength × 3 mdepth; 30 mm mesh). The fish were kept on ice and the biometric data, including total length
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Length‐to‐weight and length‐to‐length ratios of six cavefish species from the Pearl River Basin, South China J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-21 Anyou He; Yusen Li; Lei Zhou
Length‐to‐weight and length‐to‐length ratios were estimated for six cavefishes including Yunnanilus longibarbatus, Yunnanilus bailianensis, Yunnanilus jinxiensis, Oreonectes polystigmus, Paranemachilus pingguoensis, and Paranemachilus genilepis from the upper reaches of the Pearl River, Guangxi Province, China (between 106.26E, 23.14N and 111.42E, 24.85N). The fish were captured between May and October
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Length‐weight relationships of six fish species of tropical lake, Mexico J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-15 Hosmer Duvan Gomez‐Vanega; Ernesto López‐Uriarte
The length–weight relationships (LWRs) for six native fish species from the Chapala Lake, Mexico, are described in this paper. The fish were caught monthly with the support of local fishermen from different landing sites. The daily catch is obtained using the nasa charalera (pot) and the gill net. Each fisherman can operate 20 pots daily at each fishing site for approximately six or seven months; this
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The first record of the swordtail Xiphophorus hellerii Heckel, 1848 (Poeciliidae, Actinopterygii) established in the wild from Morocco J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-15 Youness Mabrouki; Abdelkhaleq Fouzi Taybi; Jamila Bahhou; Ignacio Doadrio
Aquarium and ornamental fish trade is currently recognized as a major source of invasive species in aquatic ecosystems around the world. The swordtail Xyphophorus hellerii is a popular ornamental freshwater fish that occurs as an introduced species in the aquatic habitats of at least thirty‐one countries. We report the first finding of an established population of the swordtail in Morocco. Twelve individuals
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Length‐weight relationships of three Clupeiformes species from the Southeast coast of India, Bay of Bengal, Eastern Indian Ocean J. Appl. Ichthyol. (IF 0.612) Pub Date : 2020-09-14 Kannan Karuppiah; Kannapiran Ethiraj; Kodeeswaran Paramasivam; Kumar Rajendran; Madhuri Krishnamoorthy; Divya Dharmaraj
This study deals with the length‐weight relationships (LWRs) of three commercially important marine fishes belonging to the family Clupeidae from the major landing centers in Tuticorin, Mandapam, Thondi, Nagapattinam and Chennai in southeast coast of India. Monthly sampling were done at the respected landing centers from June, 2018 to April, 2019 from the commercial trawlers (with cod‐end mesh size
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