594 fish genomes have been sequenced in past two decades, this represents 1.85% of the total reported fish species (32,000). Despite this no study represents the trends and only some studies have delved into how the genome size (GS) of the genomes are shaped by species taxonomy. However, all these studies have used data obtained by traditional cytometric methods and also have largely disregarded other

The development of a chilled storage protocol of fish sperm requires an understanding of sperm biology and function as the activation/inhibition of fish sperm is greatly affected by several environmental factors. This study aimed to determine the effects of ionic and non-ionic solutions, extender types (Ringer's solution, Ca-F HBSS solution, HBSS solution, He and Wood solution, Saline solution, and

Gynogenesis is a chromosomal manipulation technique where an offspring is generated exclusively from maternal inheritance. In the yellowtail tetra (Astyanax altiparanae) almost all gynogenetic fish were females, suggesting a genetic sex determination system of XX/XY. However, due to environmental (e.g. temperature) or unknown genetic factors, the rise of males are described. Therefore, the aim of this

Geophagus brasiliensis is a species native from Brazilian continental waters and it is distributed in several aquatic ecosystems. Despite its importance to artisanal fishing, mainly for riverside communities, and fishkeeping, this species is an unusual resource for aquaculture. Fish farming can be carried out in different systems, as in biofloc system (BFT), which has some advantages comparing to traditional

Worldwide there have been declines in stocks of exploited sciaenids. Despite a long history of exploitation, there has been no study of the life history characteristics of the fishery-important sciaenid, teraglin, Atractoscion atelodus. This study describes the reproductive characteristics of A. atelodus within the major area of its distribution and fishery, New South Wales (NSW) Australia. Characteristics

We aimed to investigate the influence of dietary vitamin E and diludine on growth and lipid peroxidation (malondialdehyde; MDA) in rainbow trout. Fish (1.5 g) were fed different dietary levels of vitamin E (0, 50 and 100 mg/kg) and diludine (0, 0.5 and 1 g/kg) for 10 weeks. Growth performance and feed conversion ratio (FCR) were significantly affected by dietary vitamin E (p < .05) but not diludine

Little is known about the life-history traits exhibited by burbot (Lota lota) throughout their circumpolar range. Monitoring burbot movements between lentic and lotic habits and collection of demographic data (length, age, sex, and maturity) were used to answer the following questions in the Torrey Creek drainage of west-central Wyoming, USA: (a) is there plasticity in the life-history traits of the

Trophic studies are key to understand the ecological role of marine species in natural ecosystems. In this study, we examined the trophic ecology of the holocephalan rabbitfish Chimaera monstrosa, a demersal chondrichthyan considered Near Threatened by the Mediterranean red list assessment of the IUCN. The study was based on the analysis of the stomach content of 86 individuals inhabiting deep-sea

Using a forward projecting population model, the timing and scale of Lake Sturgeon Acipenser fulvescens (LS) recovery and natural reproduction was estimated for the Milwaukee River in Wisconsin, USA for the years 2004–2048. LS, a widely distributed potamodromous Acipenseridae species in North America, have, like other sturgeon species, suffered population declines due to overharvest and other factors

Brown trout Salmo trutta is a potent global invader and its establishments have progressively altered physiologies, life-histories and niche-availabilities for native fish species. River impoundments further escalate its invasion potential. The Himalayan rivers however, stay uncharted for the effects of brown trout interactions with the native fish fauna. Snow trout Schizothorax richardsonii a Himalayan

Nutritional deficiency associated with reduced thiamine (vitamin B1) and reduced natural reproduction of salmonid species in the Great Lake Region is well established. The negative relationship between egg thiamine and lipid concentration to post-hatch larval growth and survival in teleost species, coupled with the limited research of egg thiamine in Acipenseriform species of conservation concern,

A single female specimen of jawfish Opistognathus evermanni (Perciformes: Opistognathidae) was recorded with the standard length of 73.17 mm from Mudasal Odai fish landing centre, along Parangipettai coast, Southeast coast of India. Opistognathus evermanni possesses X + 12 dorsal spine and rays by the head are large, its width greater than that of body and uniformly pigmented, gill rakers are very

1 INTRODUCTION The global threat to biodiversity is one of the central challenges of our time (Sala et al., 2000). In addition to climate change (Comte et al., 2013), habitat loss and structural changes, alien species are among the main causes that alter species communities in freshwaters (Jeschke et al., 2014). However, this threat with its long-term consequences can only be properly assessed if we

The Sickle Darter Percina williamsi (Page and Near, 2007) is a species of fish endemic to the upper Tennessee River basin in eastern Tennessee, southwestern Virginia, and western North Carolina. Because of its narrow range and presumed decline in occupied sites over the last half century, it is being proposed for federal listing under the Endangered Species Act. We analyzed the current distribution

A study was conducted with non-conventional ingredients to test their efficacy as fishmeal (FM) replacers in the diet of fringe- lipped carp. Labeo fimbriatus first feeding larvae and fry were reared for 30 and 60 days in indoor, 50 L, aerated, circular plastic tanks at 100 and 30 numbers tank−1, respectively. In the first feeding larvae to fry rearing experiment (Exp. 1), the fish were fed with either

Scanning electron microscopy (SEM) has been widely used to describe interspecific differences in egg quality of teleost freshwater fish, but potential intraspecific differences are poorly studied. Eggs of many rheophilic cyprinids are covered with adhesive structures such as attaching villi facilitating egg attachment at substrates of spawning grounds with high currents. Recent findings indicate that

Movement of Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) and lake sturgeon (A. fulvescens) in the St. Lawrence Estuary (Québec, Canada) are not fully understood. To assess the movement extent of both species, a mark–recapture study was conducted in collaboration with commercial fishermen operating in the St. Lawrence Estuary. Between 1981 and 2015, 3,367 Atlantic sturgeon (fork length 21.8–199

Length-weight relationships (W = aLb) were estimated for 5 fish species, the pearl stingray Fontitrygon margaritella (Compagno & Roberts, 1984), the West African spadefish Chaetodipterus lippei (Steindachner, 1895), the East Atlantic African spadefish Ephippus goreensis (Cuvier, 1831), the law croaker Pseudotolithus senegallus (Cuvier, 1830) and the Guinean sole Dagetichthys cadenati (Chabanaud, 1948)

Laurentian Great Lakes Lake Sturgeon (Acipenser fulvescens) are hosts to lamprey species, including native Silver Lamprey (Ichthyomyzon unicuspis) and invasive Sea Lamprey (Petromyzon marinus). Silver Lamprey coevolved with Lake Sturgeon and cause negligible mortality, but Sea Lamprey can negatively affect Lake Sturgeon populations. Sea Lamprey abundance in Lake Erie has been above targets set by resource

The combination of highly equipped smartphones, with the increased use of social media, has offered a wide database. Given this, citizen science can be used to record and monitor non-native fish fauna, target new samples and collaborate with monitoring occurrences in new areas. We aimed to demonstrate the efficiency of social media in citizen science as a tool to cooperate with monitoring studies of

Larvae and juveniles of long sardine, Triportheus auritus, from the lower Amazon river was described, evaluating ontogenetic changes in their external mor­phology, pigmentation, fin development, morphometry, and meristics. A total of 93 individuals, 83 larvae and 10 juveniles were analyzed, they were captured monthly between 2014 and 2019 in the Amazon river channel and in macrophytes aquatic stands

Chemokines are low-molecular-weight proteins that play an important role in the inflammatory response. During the development of aquaculture for the large yellow croaker (Larimichthys crocea, L. crocea), infectious diseases caused by viruses, bacteria, and parasites have become increasingly frequent and severe. In particular, bacterial infections caused by Vibrio anguillarum result in significant economic

Cichlid fish exhibit a complex behavioral repertoire, mainly regarding social and reproductive behaviors. Nevertheless, although dwarf cichlids exhibit a remarkable diversity of behaviors, only a few studies have been conducted with these fish. Apistogramma trifasciata is a common dwarf cichlid in the Neotropics and widely used as ornamental fish. Both males and females are territorial and engage in

Many members of the mullets (family Mugilidae) are very similar morphologically, hence the possibility of taxonomic misidentification. This study involved the use of skeleton structure to distinguish four species of mullets, including Cremugil crenilabis, Liza macrolepis, Moolgarda engelii, and Mugil cephalus, harvested from Aceh waters, Indonesia. The mullets samples were collected from 10 locations

Dams can impede access to habitats that are required for the completion of life history phases of many migratory fish species, including anadromous sturgeons. Various forms of fish passage have been developed to permit migratory fishes to move above dams, but many dams still lack such structures. Translocation of ripe, mature fish above dams has been used as a first step to determine the efficacy of

Artificial reefs are often deployed by many countries for the purpose of enhancing fishing after a period of several years. The objective of this study was to analyze the effect of a pilot artificial reef system deployment in enhancing the demersal fish assemblages, investigated using both acoustic methods and bottom trammel nets, during four years between 2011 and 2017, in Xiangshan Bay, Zhejiang

Gillnets are the primary fishing gear used in tropical multi‐species fisheries along the Iranian southern coastal waters. Therefore, it is necessary to investigate the catch composition and performance of fishing gear for the possible negative effects on the stocks. Catch data and length frequency distribution (just for Kingfish, S. commerson) were examined for three kinds of drift gillnets: 1) small‐meshed

Gonadotropins (GtHs), including follicle‐stimulating hormone (FSH) and luteinizing hormone (LH), are important hormones involved in gametogenesis, gonadal steroidogenesis, and maturation. In this study, GtH subunits (FSHβ, LHβ and CGα) of largemouth bass (Micropterus salmoides) were cloned and characterized, and their regulation by luteinizing hormone‐releasing hormone analog (LHRHa2) and dopamine

Three specimens of Herzensteinia microcephalus (Cyprinidae: Schizothoracinae) were collected from the Chalaiburkun Chu, a headwater of Dri Chu of the southern tributaries of the Yangtze River. The sampling site is located at an altitude of 5,350 m above sea level in the North Slope of the Tanggula Mountain on the Qinghai‐Tibet Plateau. This is a new highest distribution record of cyprinids, perhaps

Yoon, G. R., Deslauriers, D., & Anderson, W. G. (2020). Influence of Prey Condition and Incubation Method on Mortality, Growth and Metabolic Rate during Early Life History in Lake Sturgeon, Acipenser fulvescens. Journal of Applied Ichthyology, 36(6), 759‐767. In the above paper by Yoon, Deslauriers and Anderson (2020), because of a calculation error the mistaken Figure 4 has to be corrected by a factor

The present work describes the reproductive biology of the white marlin (Kajikia albida) caught in the southwestern and equatorial Atlantic Ocean. The gonads of 924 fish were collected by observers on board Brazilian tuna longliners, between November 2004 and December 2006. The spawning season was assessed by the monthly frequency distribution of distinct stages of maturity and monthly mean female

Length‐weight relationships (LWRs) were estimated for 16 ornamental fish species from Amanã Lake and nine tributary streams, in Central Brazilian Amazonia. Sampling was carried out bimonthly for a year (2007–2008), using two sets of four gillnets (20 m × 2 m, 2,5; 3,5; 04; 4,5 cm stretch mesh size); trawls were performed with seine nets (35 m × 6 m, 3 mm stretch mesh size); native fish‐traps (fyke‐net

In the present study the length–weight relationships (LWRs) of 6 fish species which are endemic to Western Greece, caught in the natural Lake Trichonis by experimental gillnets and electrofishing were estimated. Benthic (mesh size 5–55 mm; height 1.5 m; length 30 m) and pelagic (mesh size 6.25–55 mm; height 6 m; length 27.5 m) Nordic type multimesh gillnets were used seasonally, between February 2019

The length–weight relationships (LWRs) for seven fish species belonging to five families in the Yangtze River Estuary and its adjacent waters are presented. Cynoglossus gracilis, Cynoglossus macrolepidotus, Ctenotrypauchen chinensis, Collichthys niveatus, Ophichthus apicalis and Erisphex potti were collected monthly in 2009 using trammel nets (the size of smaller mesh net was 1.5 m × 15 m × 4 panels

One of the ways to recognize patterns is through the intrinsic information of the object's shape by descriptors that allow us to quantitatively describe the contained shape of the object. In ichthyology, the otolith shape recognition is notable for each fish species, which allows the study of the sagitta otolith in species classification, the comparison of otolith shape across the fish ontogeny or

This study aimed to estimate the parameters of the length-weight relationship for 12 freshwater fish species that inhabit lakes in the Negro River basin (Amazonas state, Brazil). The fishes were sampled using gillnets (15 × 2 m, mesh size 30–100 mm between knots), during the hydrologic cycle: low water (dry), flooding, high water (flood), and receding water, from 2008 to 2010, 2012 and 2013. The gillnets

Water temperature controls a plethora of morphological and metabolic functions in fishes and studies examining thermal tolerance of fishes and the responses of fishes to changing water temperatures have been conducted for over a century. Although there has been a renewed interest in the management and conservation of alligator gar, currently there are no data regarding the thermal minima of the species

Alburnoides holciki Coad & Bogutskaya, 2012 was originally described to be found in the Hari River basin. So far, this species is known to occur in tributaries of the Hari River in Afghanistan, Iran and Turkmenistan, and also in the upper reaches of the Amu Darya in Tajikistan. Populations from the inland waters of Uzbekistan were previously considered as A. eichwaldii. Our study recognized specimens

Environmental assessments of underwater noise on marine species must be based on species-specific hearing abilities. This study was to assess the potential impact of underwater noise from the East China Sea Bridge wind farm on the acoustic communication of the marbled rockfish. Here, the 1/3 octave frequency band of underwater noise was 125 Hz with the level range of 78–96 dB re 1 μPa, recorded at

The restoration of threatened species involves understanding multiple aspects of the life history and ecology of the target species. One important consideration in the restoration of threatened species is feeding ecology. We examined the summer diet of reintroduced juvenile lake sturgeon (Acipenser fulvescens) in the Genesee (n = 119, ages 1 and 2) and the St. Regis rivers (n = 40, ages 1, 2, 5, 6

This study was designed to evaluate the effects of dietary crawfish shell meal (CSM) on the growth performance, digestive enzyme activity and anti-oxidative capacity of Oujiang color common carp. 180 juvenile fish (initial weight 3.0 ± 0.5 g) were assigned to the control group and the CSM25 group (fed with 25% substitution of fish meal by CSM) for 8 weeks. Results showed that significant improvement

Expression of vitellogenin gene (vtg) is used as a biomarker for the evaluation of the exposure of estrogenic substances in fish. However, scientific information regarding this biomarker in Neotropical fish is limited. In this study, a 760 bp partial sequence of the vtg mRNA from the liver of the catfish Rhamdia quelen was cloned, representing almost 20% of the full-length vtg. The phylogenetic tree

Length-weight relationships of 4 coral-reef fish species regularly encountered in artisanal coastal fisheries across 5 atolls of the Gilbert Islands, Kiribati, were obtained. The data were collected through creel surveys undertaken randomly over a period of 20–100 days each year between 2013 and 2020. The main fishing methods used were gillnetting (minimum legal mesh size of 63.5 mm), handlining and

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

Detection of rare species can be challenging and time‐consuming using conventional methods, but environmental DNA (eDNA) is becoming a commonly used tool for detection in conservation and management of species. This study demonstrates the utility of the precipitation method (precipitated and preserved in 3 M sodium acetate and 95% ethanol) for collection of eDNA to detect the seasonal distribution

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

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

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

The interaction between dietary valine (Val) and isoleucine (Ile) on growth, blood parameters, and tolerance against low salinity stress of Japanese flounder Paralichthys olivaceus was studied in a 60‐day feeding trial. Fish (initial body weight: 3.57 ± 0.05 g) were fed six experimental diets containing different proportions of Ile and Val, two levels of Ile 0% (LI) and 2% diet (HI), combine with three

Life history plasticity can be a strong predictor of the establishment and invasion success of introduced fishes. Here, the life‐history traits of four P. parva populations in adjacent ponds in Southern England were measured throughout 2013 to determine the timing and length of their reproductive season and the extent of trait plasticity. The relative abundance of the populations (as catch per unit

Genetic patterns observed among populations by neutral molecular markers is a major method used to reconstruct the invasion history of invasive species. The Shimofuri goby (Tridentiger bifasciatus) has invaded several lakes along the East Route of the South‐to‐North Water Transfer Project, China (ENST). However, neutral molecular markers for this goby are not currently available. In this study, fourteen

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

This study aimed to estimate the parameters of length‐weight relationships (LWRs) for six freshwater fish species that inhabit in the Xiangjiang River of Guangxi region, China. The specimens were sampled in April, July, and October 2014 and in January 2015 using electrofishing (CWB‐2000P, China; 12 V import, 250 V export) and traps (mesh size 8.5 mm; length 200 m) at five sampling sites. For each sampling

Length‐weight relationships (LWRs) were assessed from four fish species in Hei River in northwest China. All specimens were collected using (fishing1 km along the river and 3 meters along the river bank) and netting (gill nets, nets: 30 × 1.2 m; mesh size: 3 × 3 cm) and shrimp cages (nets: 20.0 × 0.5 × 0.4m; mesh size: 0.5 cm) seasonally from April 2019 to October 2020. The gill nets and shrimp cages

Length weight relationships (LWR) of five marine fishes were estimated from the Bay of Bengal, Bangladesh. Fish samples were collected occasionally from fisher's catch with gill net (mesh size: 3 cm) during November 2019 to October 2020. Fishing was done overnight. Total length (0.1 cm) and body weight (0.01 g) of each individual were measured. We recorded maximum total length for P. maculatus (55

Length‐weight relationship (LWR) parameters were analysed for six demersal finfish species from the Gulf of Mannar coast, Bay of Bengal. Fishes were sampled monthly from the landings of trawlers operated along the coast of Tuticorin and Rameshwaram with a cod‐end mesh size of 35 mm at the depth of 60–80 m. Fish specimens were sampled by measuring the total length (TL) and total weight (TW) with precision

Length–weight regressions for five chimaerid species, Chimaera monstrosa Linnaeus, 1758, Chimaera opalescens Luchetti, Iglesias & Sellos, 2011, Hydrolagus affinis de Brito Capello, 1868, Hydrolagus pallidus Hardy & Stehmann, 1990 and Hydrolagus mirabilis Collett, 1904, and two Rhinochimaerid species, Rhinochimaera atlantica Holt & Byrne, 1909 and Harriotta raleighana Goode & Beane, 1895, are calculated

This study estimated the LWRs of six fishes from the coastal waters of Greater Accra, Ghana. Data was obtained monthly from June 2018 to July 2019 and analyzed for total length and weight measurement to the nearest 0.1 cm and 0.01 g respectively. The sampling was done using hooks and line as well as monofilament and multifilament gear types. The mesh sizes for both monofilament and multifilament gear

This study evaluated how water temperature (26, 28, and 30°C), number of meals per day (one or two meals), and protein percent in diet (20, 25 and 30%) impact growth performance, biometric indices, and feeding behavior of Nile tilapia, Oreochromis niloticus. Fish were randomly allocated into 18 equal replicate groups. Higher final body weight was observed in fish reared at 30°C and fed one meal per

1 INTRODUCTION Monitoring the fish community in September 2019 of the floodplain waters near Bislich at the Lower Rhine, an unknown, small Gobiid species was firstly caught that differed considerably from all other known alien Gobiids in our region. Based on morphological descriptions and keys provided by Kottelat and Freyhof (2007), it was most probable that the new species belonged to the genus Knipowitschia