The nearshore ecosystem of Hainan Island plays a crucial role as breeding habitat for wide variety economically valuable fish species. Gaining insight into the structure community and environmental factors that may impact them is highly significant in this marine region. This study collected data from 50 sampling sites using bottom trawling surveys. Methods including swept area method, ecological indices, abundance/biomass curve (ABC) analysis were employed to assess resource density...

The aim of this study was to characterize a Triticum aestivum-Psathyrostachys huashanica Keng (2n = 2x 14, NsNs) disomic addition line 2-1-6-3. Individual 2-1-6-3 plants were analyzed using cytological, genomic in situ hybridization (GISH), EST-SSR, and EST-STS techniques. alien shown have two P. chromosomes, with meiotic configuration 2n 44 22 II. We tested 55 EST-SSR 336 primer pairs that mapped onto seven different wheat chromosomes DNA from parents the line. One nine indicated additional...

We isolated a wheat germplasm line, 22-2, which was derived from common (Triticum aestivum ‘7182’) and Psathyrostachys huashanica ‘Keng’ (2n = 2x 14, NsNs). Genomic composition homoeologous relationships of 22-2 analyzed using cytology, genomic in situ hybridization (GISH), EST–SSR, EST–STS to characterize the alien chromatin transfer line. The cytological investigations showed that chromosome number configuration were 2n 44 22 II. Mitotic meiotic GISH P. DNA as probe indicated contained...

Six heavy metals (As, Cu, Cd, Zn, Cr, and Pb) in surface sediments (0–5 cm) from the twenty selected sites of coastal Pearl Bay (South China Sea) were analyzed to assess distribution pattern potential ecological risk. Overall concentrations (mg/kg, dw) sediment samples were: As (10.88 ± 6.50), Cu (24.16 18.63), Cd (0.55 0.78), Zn (48.53 30.06), Cr (35.78 28.66), Pb (31.28 18.50). Results showed that overall mean values exceeded standard Marine Sediment Quality, caused by significantly high...

Chub mackerel ( Scomber japonicus ) is widely distributed in the northwestern Pacific Ocean and utilized by China, Korea, Japan different seasons areas. Generally, chub divided into Tsushima Warm Current (TWC) stocks based on its distribution, migration, life-history traits. The two showed obvious interannual to decadal variability abundance with evident variation patterns. has extensive spawning areas Ocean, main period from March June, suitable SST (sea surface temperature) ranging 15°C...

This study explored the ecological niche and interspecific relationships among main fish species in coastal waters of Hainan Island based on data from fishery stock surveys conducted spring autumn 2022. The methods chi-square test, percentage co-occurrence (PC), association coefficient (AC), cluster analysis, redundancy analysis were used to analyze associations influence environmental factors niches communities. According breadth, 20 fishes could be divided into broad, medium, narrow...

In previous studies, our research team successfully transferred the Ns genome from Psathyrostachys huashanica Keng into Triticum aestivum (common wheat cv. 7182) using embryo culture. present study, one of these lines, i.e., hybrid progeny 25-10-3, which matured about 10–14 days earlier than its parent, was assessed sequenced characterized amplified region (SCAR) analysis, EST-SSR and EST-STS molecular markers, genomic in situ hybridization (GISH). We found that this a stable wheat-P....

Thirty samples of surface sediments (0-5 cm) from the northern Beibu Gulf were analyzed to determine spatial distribution, potential risks and sources six heavy metals (Cr, Cu, Zn, As, Cd Pb). The concentrations (mg/kg, dw) Cr, Pb 15.38 ± 6.06, 6.54 3.23, 41.86 17.03, 6.92 2.75, 0.04 0.02 17.13 6.38, respectively. Higher levels Zn observed in western part study area. According ecological risk indexes sediment quality guidelines, measured assessed at low contamination levels, with posing...

The length-weight relationships (LWRs) for five myctophid species were estimated, named Symbolophorus evermanni (Gilbert, 1905), Nannobrachium nigrum Günther, 1887, Ceratoscopelus warmingii (Lütken, 1892), Lampadena yaquinae (Coleman & Nafpaktitis, 1972) and Myctophum asperum Richardson, 1845. Specimens collected using light-purse seine (mesh size 3.5–4.5 cm) in the high seas of Northwestern Pacific spring 2015 summer 2016.

Fishery resource and environmental data from four surveys conducted in the Hainan Island offshore area March 2021 to June 2022 were used investigate spatiotemporal distribution of round scad (Decapterus maruadsi). A generalized additive model was applied explore relationships among abundance distribution, also biotic abiotic factors (i.e., temperature, salinity, chlorophyll-a concentration, water depth, phytoplankton abundance, zooplankton jack mackerel (Trachurus japonicas) abundance)....

The objectives of this study were to evaluate the effect stock enhancement on Penaeus japonicus (Bate, 1888) in Beibu Gulf, South China Sea, and investigate whether has genetically affected natural population P. Gulf waters. Five microsatellite loci used identify released individuals among recaptured specimens. In total, 13 487 found with their corresponding parents for release shrimp seedlings, accounting 2.67% total japonicus. Furthermore, it was determined that genetic differences...

Sexual growth dimorphism is a common phenomenon in teleost fish. However, the mechanism of this complex remains unclear. The fine-patterned puffer (Takifugu poecilonotus; Temminck and Schlegel, 1850) exhibits female-biased sexual size similar to other pufferfish. In study, transcriptomes female male T.poecilonotus were sequenced, 285.95 million raw read pairs generated from sequence libraries. After identification assembly, total 149,814 nonredundant unigenes obtained with an N50 length 3538...

As an economic species widely distributed in the South China Sea (SCS), purpleback flying squid (Sthenoteuthis oualaniensis) still has a large potential for exploitation, and variations its use as resource are highly correlated with environmental other factors. In this study, using generalized additive model (GAM) gradient forest analysis (GFA), conjunction factors, distribution of surrounding Xisha Zhongsha islands during fishing moratorium period was investigated. The results indicated...

Based on fishery resources and environmental data collected during six cruises conducted in the spring autumn from 2021 to 2023 northern Beibu Gulf, South China Sea, we an analysis spatiotemporal distribution of crimson seabream (Paerargyrops edita). We employed a gradient forest (GFA) generalized additive model (GAM) investigate relationship between their factors, including sea surface temperature (SST), salinity (SSS), chlorophyll concentration (Chla), bathymetry (Depth), height (SSH), as...

The well-being of marine ecosystems significantly influences biodiversity and ecological equilibrium amidst pressing challenges such as overfishing, water pollution, climate change. Drawing upon data from two fishery stock surveys conducted in the inshore waters Hainan Island 2022, this study undertook a comprehensive evaluation ecosystem’s health status region. Employing Fish Index Biological Integrity (F-IBI) analysis method, coupled with an examination structural functional aspects fish...