The study was carried out in Gökçeada, located in the North Aegean Sea in 2017, during winter and summer seasons and the concentrations of 16 polycyclic aromatic hydrocarbon (PAH) components were determined in P. oceanica type seagrass samples. Total PAH (TPAH) values ranged from 190.8 to 7668.7 ng g−1 dw during the sampling period. In addition, the source of pollution was investigated by using PAH

The objective of this study was to evaluate the population structure and reproductive biology of Persephona lichtensteinii and P. puncata off Sergipe, two common species found in the bycatch of shrimp trawlers. Four samples of 6 kg were collected monthly from trawlers based in Pirambu-Sergipe. All individuals of Persephona were separated, identified, and weighed (TW, total weight, g). Carapace length

The coastal zone of Los Petenes” Biosphere Reserve, is a critical breeding habitat for many species, particularly fish. Despite its low anthropic impact, development on the coastal area around the reserve is gradually increasing and fishing activities continue to grow; however, there are few studies on fish communities and the characteristics of their environment. In addition, there are no reference

Size frequency, length-weight relationships (LWRs), and length-length relationships (LLRs) for an estuarine fish Taenioides cirratus (Blyth, 1860) from the Noakhali coast, Bay of Bengal was studied. Specimens were caught with the fixed purse net of two mesh sizes (0.2 to 0.5 in. and 2.0 to 2.5 in.) from March to July 2019. The maximum total length for male T. cirratus (36.2 cm) reported in this study

Spatio-temporal patterns of macrobenthic epifaunal communities with fishing disturbances indicate that the fishing process directly leads to a decrease in diversity and substratum sediment homogenization. However, it has not yet been explored exclusively at the community reconstruction dynamic level with fishing changes over time. This study monitored the macrobenthic epifaunal communities during the

The crocodile shark Pseudocarcharias kamoharai (Matsubara, 1936) is a species caught incidentally off the coast of Ecuador with no commercial importance in the country. As with many elasmobranch species, very little is known about its general biology. The aim of this study was to provide baseline information to enhance the knowledge on various aspects of the biology of this species. During the years

The present study is a part of long term ongoing study on brachyuran crab diversity of India. The specimens were collected from intertidal zone as well as from the fisheries by-catch captured using commercial trawler. The specimens were identified up to species level using standard literature. From the collection, four species of brachyuran crabs, Schizophrys pakistanensis Tirmizi & Kazmi, 1995 (Majidae)

Monosex breeding technology has received enormous attention for the Scylla paramamosain, an economic crustacean species with distinctive sexual dimorphism. However, the molecular mechanism of gonadal development and sexual differentiation still remain inconclusive. In this study, we reported the cloning, characterization of a FoxL2-like gene with male-biased expression in the mud crab (SpFoxL2). The

The lifecycle of red tide forming dinoflagellate Noctiluca scintillans (Ehrenberg) McCartney was investigated from the estuarine waters of Cochin and also from their clonal cultures. Reproductive divisions including asexual binary fission and sexual isogamete formation were studied. Certain vegetative cells were observed to undergo binary fission. Gametocyte mother cells underwent meiosis followed

The stratigraphy of the late Holocene shallow subsurface coastal sediments, North Al-Wajh, Saudi Arabia was investigated to reconstruct the environmental evolution of the area in relation to sea-level changes. Five shallow cores (1.1 to 2.2 m long) were collected from the intertidal flat bordering the Dumaygh Lagoon, and the mouths of wadis Antar and Haramil. The cores exhibit siliciclastic-dominated

Variation in salinity is one of the principal changes in estuarine physicochemistry that can impact the productivity of estuarine species. The effect of salinity on the mortality, growth, and metabolite profiles of juvenile Eastern School Prawn (Metapenaeus macleayi) was evaluated across a salinity gradient ranging from 0.2–36 over 60 days. Survival was >70% for salinity treatments other than the lowest

In the Mediterranean Sea, Lobotes surinamensis (Bloch, 1790) is considered as a rare species, albeit an increasing number of individual-based sightings published in the literature. In this study, we present 32 additional records of this thermophilic species from the Greek and Cypriot waters; reinforcing the evidence that the species is becoming more common to the region. All of the records were collected

The charophyte flora from Socotra Island, Indian Ocean, studied for the first time from streams waterbodies that distributed at the northern part of the Island. The recognized charophyte taxa were taxonomically investigated, and four dominant species belonging to family Characeae are identified as Chara braunii, C. globularis, C. hispida and Lamprothamnium papulosum. These taxa are reported as a new

The understanding of the processes that regulates the distribution of the resident macroinfauna on sandy beaches is an urgent need at the current global change scenario. Here, we examine whether the spatial-temporal distribution of the burrowing shrimp Callichirus major (Callichiridae) is affected by the climatic and tidal regimes in two sandy beaches of Brazil (José de Menino and Itaguaré), where

This study reports the occurrence of box jellyfish Tripedalia cystophora from the brackish water of Kerala, India for the first time. The other reports of this species were from Jamaica, the Philippines, Ecuador, Japan, Puerto Rico, Brazil, Indonesia, Florida, Thailand, Grand Bahama, Seychelles, Comoros, Australia, Hawaii and the Gulf of Mexico. The present study collected four specimens (two each

The present study investigates the effect of four microalgal diets in two dietary modes viz. mono diets (Dunaliella salina, Isochrysis galbana, Chaetoceros calcitrans) and combined diet (Isochrysis galbana and Chaetoceros calcitrans) on growth parameters such as morphological development, larvae survival and metamorphosis of Salmacis bicolor species grown under laboratory conditions for a period of

Ophichthus sangjuensis (Ji and Kim, 2011), a species reported earlier from the Korean water as Pisodonophis sangjuensis Ji and Kim, 2011, of the Northern Pacific Ocean, is reported here from Indian waters on the basis of 8 specimens collected from the Bay of Bengal. The present paper reports the species for the first time from Indian waters and the distributional range of the species by this report

This study aimed to determine the effect of rearing water temperature on survival, growth and molting cycle of the mud crab, S. paramamosain from Megalopa up to 1st crablet instar (Crablet 1) and from Crablet 1 to 2nd crablet instar (Crablet 2). Different water temperature regimes were implemented i.e. 20 °C, 24 °C, 28 °C, 32 °C, 36 °C and ambient temperature. The observed parameters were: successful

The present study investigates the demographic characteristics of economically, ecologically and medicinally important mudskipper species, Pseudapocryptes elongatus (Cuvier, 1816) from Indian Sundarbans, based on data collected over 15 consecutive months. Length-frequency data of 945 individuals collected from the Indian Sundarbans were analyzed using a FAO-ICLARM Stock Assessment Tool. Length–weight

A new record of Hasselt’s bamboo shark Chiloscyllium hasseltii (Orectolobiformes: Hemiscylliidae) has been confirmed from the St. Martin’s Island, the northeastern part of the Bay of Bengal of Bangladesh. Two male specimens were collected on 19th December 2018 from the coast of St. Martin’s Island as a bycatch of the local fishermen. The traditional morphometric method was applied for taxonomic identification

The colonization of biofouling organisms is a significant problem for the aquaculture installations which affect the economy of the fish farms and wellbeing of the cultured fish. In this study, the colonization of biofouling organisms on cage aquaculture nets submerged near to the existing floating cages was analysed for a period of one year from June 2017 to May 2018. Cage net panels were fitted onto

Brown shrimp Penaeus aztecus Ives, 1891 seems to be well adapted in the Ionian Sea since its first occurrence in the coastal zone of the island of Corfu during 2013. In the current work, we present additional new records from Argostoli Gulf (Cephalonia Island), Sagiada Bay (Therspotia, NW Greece) and Mesoggi (Corfu Island), which verify the wider distribution of the species. Moreover, direct contacts

Although crab Pachygrapsus marmoratus, is one of the common species in the intertidal zones of the Aegean coasts of Turkey, its’ population structure has not been investigated to date. This study aimed to provide information on population characteristics of Pachygrapsus marmoratus, including the sex ratio, size distribution, spawning period, relative growth and catch per unit effort (CPUE). The samples

The Sardine run associated with a bloom of the diatom genus Fragilariopsis was observed along the inshore coastal waters off Kanhangad during the last phase of the summer monsoon 2019. There was an unusual shoreward dumping of live oil sardines along with the waves throughout the day. High salinity (33 psu) and nutrient concentrations (Nitrate 16.33 μmol L−1 and silicate 13.9 μmol L−1) favoured the

Sera 17β-estradiol (E2), 11-ketotestesteron (11-KT) and 17,20-β-dihydroxy-4-pregnen-3-one (17,20βP) levels together with histological changes in liver and gonad tissues were determined after exposing sexually mature female C.carpio to 0.13 and 0.26 mg L− 1 lead for 7, 14 and 21 days. Effects of lead on hepatosomatic - gonadosomatic indices of female fish were also determined after these exposure periods

Trace elements contamination in the aquatic ecosystem is a current and major environmental concern due to their non-degradable nature and toxic effects on human health. Concentrations of arsenic (As), chromium (Cr), cadmium (Cd) and lead (Pb) in fish were estimated to evaluate contamination levels and health risks for Bangladeshi adults. A total of six demersal fish species namely Mystus vittatus,

Amphioctopus ovulum is an important species found along the China coast distributed from the East China Sea to the South China Sea. This is the first study about the population structure and diversity carried out for this species in the China Sea. Two mitochondrial DNA genes Cytochrome oxidase subunit 1 and Cytochrome b (CO1 & Cytb) and one nuclear DNA gene (Heat shock protein 70 (HSP-70) were used

During December 2010, an expedition was conducted to the Philippines Islands aiming to collect coastal polychaetes in the area. Among the abundant material, 593 individuals belonging to the family Eunicidae (Annelida; Polychaeta) were found and studied, and their identification yielded seven species. Four of them were new records to Philippines, enlarging the list of eunicid polychaetes of the country

The fourspine sculpin Rheopresbe kazika is a cottid fish endemic to Japan, and this fish is designated as a national monument species in some areas of the country. The natural population of the fish has decreased in recent years, and therefore various efforts have been made to establish an efficient culture system for this species. However, there is little information available regarding the life history

The petal-eyed swimmer crab, Vojmirophthalmus minabensis (Sakai 1961) is reported for the first time from the Indian coast. A single ovigerous female specimen was collected from the Nochikuppam fish landing centre, Chennai coast, southeast India. This species has previously been recorded only from the Sea of Japan and off the coast of Sarawak, Borneo. This report widens the knowledge of its distribution

The Mamanguape River estuary represents an important environment for marine species, where there are the combination of soft-bottoms and reefs zones. The present study reports on the echinoderm species inhabiting Barra de Mamanguape, at Northeast coast of Brazil. A total of 83 specimens were analyzed, belonging to 13 species, 10 families and the classes Crinoidea, Ophiuroidea, Echinoidea and Holothuroidea

The present study was designed to assess the alternate environmental friendly source of protein; here we report the suitability of soybean meal as a plant protein source for partial replacement of fishmeal in the diet of Arabian yellowfin seabream Acanthopagrus arabicus; reared in floating net cages. A total of 56 days feeding trial was conducted to evaluate the growth performance, feed utilization

The length-weight relationships (LWRs) of fourteen marine pelagic fish species were determined in the southeastern Arabian Sea. Specimens were collected on weekly basis from two major fishing harbours (Mangalore and Malpe) along the Karnataka coast during 2017–2018. The fish were caught using wide variety of fishing gears such as trawlnets, purse seines, ring seines, gillnets and long lines. The estimated

The Bearded Ghoul, Inimicus didactylus (Pallas, 1769), a member of stonefish family previously known to be distributed only in the western Pacific from southern Japan, northern Australia and Vanuatu is reported herein from the southeast coast of India. This report constitutes the fifth species of the genus Inimicus to be reported from the Indian waters. The meristic and morphological characters of

The present study reports length-weight relationships (LWRs) and Fulton’s condition factor (K) of five marine finfish species [(Siganus vermiculatus (Valenciennes, 1835), Kathala axillaris (Cuvier, 1830), Exocoetus volitans, Linnaeus, 1758, Chaetodon collare Bloch, 1787 and Boleophthalmus dussumieri Valenciennes, 1837)] from Parangipettai (East coast, Tamil Nadu) and Mumbai (West coast, Maharashtra)

The mudflat crab (Helice tientsinensis) is one of the most common crabs along the coast of China, and it is one of the important commercial species in Chinese aquaculture. However, unlike other consumed crabs, which are omnivores or carnivores, H. tientsinensis is a primarily herbivorous crab. Studies have rarely been conducted on the expression of digestive enzyme genes and their role in regulating

Intersexual hound sharks, Iago cf. omanensis (Triakidae) were found in unusually large numbers from India coast, north-western Bay of Bengal. A total of 154 specimens were collected during August 2018 to July 2019 from Digha Mohana Fish Landing Centre (West Bengal, India) whose size ranged from 21.5 to 59.7 cm total length (TL) with a mean length of 40.06 ± 0.57 cm (Mean ± SE, n = 154). Out of these

The present study reports the Scolopsis xenochrous Günther, 1872 off Vizhinjam coast, from Wadge Bank, Southeastern Arabian Sea. Four specimens of S. xenochrous were collected at a depth of 20 to 30 m by a gill net operated by traditional fishing craft. The morphometric and molecular identification characters of the verified specimens are described. The most of the morphometric measurement and meristic

Although Atherinomorus forskalii is the oldest lessepsian fish species with a widespread distribution range, there have not been any study about its biological and ecological features. Therefore, we aim to understand its effects on coastal ecosystems by determining its feeding ecology and life span. Four hundred sixty-two specimens were obtained with Sabiki rigs from the Turkish coast of the Levantine

The present study deals with the first record of symbiotic crab Harrovia elegans de Man 1887 (Crustacea: Decapoda: Pilumnidae) collected from Tuticorin and Mandapam regions of Gulf of Mannar during February 2019. This crab species affiliates to family Pilumnidae, under the Decapoda infra-order Brachyura and is for the first time reported from the Indian mainland. The present specimens (One adult male

Surplus-production models (SPMs) are the foremost conventional methodical tool for assessing fish stock when the data comprised of a time series of catches for an exploited population. Annual catch and effort data of 24 years from 1991 to 2014 were analyzed to estimate the Maximum Sustainable Yield (MSY) of marine captured shrimps of Bangladesh by using packages of CEDA and ASPIC. The maximum catch

Parabotia bimaculata is a common small-bodied endemic riverine loach in China. There was still no relevant genetic information for P. bimaculata. Here, we reported that the complete mitochondrial genome of P. bimaculata was a circular molecule of 16,588 bp in length, with two rRNA genes, 13 protein-coding genes, 22 tRNA genes, and a control region (D-loop). The gene composition and the structural arrangement

The neritiform gastropods Plesiothyreus cinnamomeus (Gould, 1846) was collected from Indian coast for the first time and Zacalantica galathea (Lamarck, 1819) for the first time from the recorded from Lakshadweep Sea, west coast of India. The record of Plesiothyreus cinnamomeus confirms the extended distribution of the species from the Pacific Ocean to the Arabian Sea.