The Karnaphuli River estuary, located in southeast coast of Bangladesh, is largely exposed to heavy metal contamination as it receives a huge amount untreated industrial effluents from the Chottagram City. This study aimed assess concentrations five metals (As, Pb, Cd, Cr and Cu) their bioaccumulation status six commercially important fishes, also evaluate potential human health risk for local consumers. hierarchy measured concentration level (mg/kg) was follows: Pb (13.88) > Cu (12.10) As...

The present study aimed to map out the current threats and anticipated impacts of climate change on most important hilsa shad (Tenualosa ilisha) fishery associated fishing communities based fieldwork in six coastal communities. To collect empirical data, individual interviews, focus group discussions, oral history, key informant interviews were conducted. supplement findings, time-series data cyclones sea-borne depressions Bay Bengal also analyzed. Analysis secondary regarding change-induced...

A 105-day experimental trial was conducted to assess different levels of dietary Aleo vera extract supplementation on water quality parameters, proximate composition, growth performance and haematological parameters fry Oreochromis niloticus. Four percentages leaf powder (ALE) with a basal feed, designated as, i.e., T0 (Control group; without ALE), T1 (1% T2 (2% T3 (3% ALE). Fish reared in concrete tanks (7.0 m, 1.6 1.0: L, W, H; volume 11.2 m3/tank), an average initial weight 4.04 ± 0.03 g/...

River water and sediment embody environmental characteristics that give valuable information about the eco-environment. Due to rapid unplanned urbanization industrialization, aquatic environment of any urban river can be seriously polluted by heavy metals. Four metals (As, Cr, Cd, Pb) were analyzed in surface sediments from Kirtankhola located coastal area Bangladesh. The decreasing pattern was observed as Cr > Pb As Cd both sediment. metal ranges 1.67–7.31, 12.64–45.69, 0.01–1.59,...

Understanding the reproductive biology of fishes is crucial to making accurate and scientifically sound recommendations for fisheries management. The presently reported study first report characteristics data-deficient recently described yellowfin snapper, Lutjanus xanthopinnis Iwatsuki, Tanaka et Allen, 2015, collected from eastern South China Sea, Malaysia. A total 572 fish specimens were sampled monthly March 2022 April 2023 using a gillnet trawl net. Subsequently, these measured weighed....

The groupers are a group of demersal fish that live in tropical and subtropical areas mostly linked to coral reefs. highly valued international markets subjected overfishing the wild. Accurate resource identification knowledge is essential for sustainable fisheries management. This research aimed generate reference COI sequence library grouper species caught Simeulue Banyak Islands, Aceh. study was conducted from April-September 2021 at sixteen landing sites Islands. In total, this generated...

The present study offers the first report of length-weight relationships (LWRs) and relative condition factor (K$_{n}$) coralassociated snapper fishes namely: Lutjanus johnii, L. quinquelineatus, xanthopinnis collected from Pulau Kambing fish landing port, Terengganu waters South China Sea, Malaysia. This also a new maximum total length 26.8 cm (standard 21.3 cm) for xanthopinnis. A 861 specimens were monthly March 2022 to February 2023 that caught by using different types fishing gear such...

Seaweeds can play an essential role in controlling antibiotic resistance for bacterial diseases. Three extracts of two brown seaweeds Padina tetrastromatica and Sargassum ilicifolium were investigated as growth promoters to provide immune protection against Vibrio parahaemolyticus. Extracts the administered at 2.5 5 g kg−1 with food 45 days Penaeus monodon juveniles. The maximum weight gain (6.28 7.08 g), specific rate (3.39 3.32%), survival (78.45 82.45%) juvenile tiger shrimp obtained a...

The fishery of the Bay Bengal (BOB) is assumed to be suffering from overexploitation. This paper aims assess sustainability current level fishing effort as well possible changes driven by anthropogenic and climate factors. Therefore, commercial marine BOB for period 1985/86 2007/08 analyzed applying Gordon-Schaefer Surplus Production Model on time series total catch standardized effort. Static reference points such open-access equilibrium, maximum economic yield, sustainable yield are...

Abstract The Karnaphuli, a major river of Bangladesh, located off the coast Chittagong in Bay Bengal is largely exposed to heavy metal pollutants, which may be toxic humans and aquatic fauna. estuary striking example site where human pressure ecological values collide with each other. In spite being supplier fish food for local community, there has been no study carried out date assess potential health risk due contamination species from this estuary. Therefore, aim present was...

As an intermediary connection between primary producers and higher trophic levels, zooplankton are important component of the aquatic food chain, contributing significantly to biological productivity. This study describes diversity community structure, as well their relationships with ecological factors, in homestead ponds a coastal district along northern Bay Bengal region. Significant differences (p < 0.05) were detected mean values temperature, pH, DO, TDS, transparency, phosphates...

AbstractSize frequency and length–weight relationships (LWRs) for three cephalopods, Indian squid Photololigo duvaucelii, needle cuttlefish Sepia aculeata, spineless Sepiella inermis were studied. Specimens caught from the coastal waters of Bangladesh (Moheshkhali Channel Sonadia Island) using both trawl marine set bag nets. The maximum dorsal mantle length squid, cuttlefish, was recorded to be 228, 135, 82 mm, respectively. estimated growth coefficient b 1.377 2.504 1.979 cuttlefish. these...

The cladocera Moina macrocopa serves as a common live feed that is suitable for most freshwater fish species. Seven diets the cladocera, viz. Chlorella sp., rice bran, soybean meal, chicken manure, swiftlet waste, canola oil, and artificial micro pellet were compared in this study. This study's objective was to analyse effect of enriched M. on growth, survival, dietary profiles hybrid Nile tilapia fry. feeding experiment lasted over 60 days. with bran has produced highest weight gain (5.83...

The aim of this study was to estimate the size at first sexual maturity (Lm) for 36 species belonging 24 families from marine habitat Balochistan and Sindh in Arabian Sea, Pakistan through maximum length based an empirical logistic model using commercial catch during June 2020 May 2021. Individual total (TL) noted up 0.1 cm measuring broad. Lm calculated two formulae; (i) log = - 0.1246 + 0.9924 * (Lmax) Elasmobranchs (ii) -0.1189 0.9157* ray-finned fishes. minimum recorded as 10.27 TL...

The yellowfin snapper, Lutjanus xanthopinnis, was recorded as a newly described species in the Indo-Pacific region 2015. However, knowledge of its biology, biogeography and ecology is scarcely understood, and, hence, current conservation status categorized Data Deficient. mitochondrial cytochrome c oxidase subunit I (COI) gene examined to confirm identification. We also COI haplotypes L. xanthopinnis Brunei Darussalam Malaysia together with other waters, i.e., Bangladesh, Indonesia, Japan,...

Genetic connectivity of narrow-barred Spanish mackerel (Scomberomorus commerson) from the South China, Bali and Java Seas was investigated using mitochondrial cytochrome b gene sequences. The nucleotide haplotype diversities estimated among sequences ranged 0.012–0.014 0.83–0.92, respectively. phylogenetic analysis (Maximum Likelihood) indicated that individuals sampled belong to a single taxonomic clade. molecular variance (AMOVA) FST values revealed non-significant variation populations....

Eighty-four specimens collected from 13 populations Malaysia, Thailand, and Vietnam were analysed, revealing 21 putative haplotypes with overall estimated haplotype nucleotide diversities of 0.79 0.0079, respectively. High levels diversity an absence founder effects observed among in peninsular Malaysia. In contrast, Sarawak exhibited low genetic diversity, which is a typical sign colonies introduced single source. Historical translocation Trichopodus pectoralis Thailand to as well the...

The population genetic diversity and demographic history of the longtail tuna Thunnus tonggol in Malaysian waters was investigated using mitochondrial DNA D-loop NADH dehydrogenase subunit 5 (ND5). A total 203 (D-loop) 208 (ND5) individuals T. were sampled from 11 localities around coastal waters. Low differentiation between populations found, possibly due to past history, dispersal potential during egg larval stages, seasonal migration adults, lack geographical barriers. gene trees,...

Abstract Benthic species, though ecologically important, are vulnerable to genetic loss and population size reduction due impacts from fishing trawls. An assessment of diversity structure is therefore needed assist in a resource management program. To address this issue, the two-spined yellowtail stargazer ( Uranoscopus cognatus ) was collected within selected locations Indo-West Pacific (IWP). The partial mitochondrial DNA cytochrome c oxidase subunit 1 nuclear recombination activating gene...