Dam construction facilitates the colonization of non-native fish species by altering hydrological environment and increasing nutrient concentrations, while usually declining richness native species. The invasion in subtropical reservoirs has become widespread China; thus, research on introduction their relationship with remains urgently needed. In this study, we seasonally investigated communities across four different ages levels Fujian, China, examining dominance, catch per unit effort...

A 65-day growth trial was conducted to investigate the dietary protein requirements for Culter mongolicus fingerlings. Isolipidic and isoenergetic diets were formulated with five levels (32%, 37%, 42%, 47%, 52%). Each diet assigned triplicate groups of 70 C . fingerlings (0.99±0.08 g). The results indicated that weight gain specific rate (SGR) increased increasing up 47%. activities intestinal trypsin lipase lowest in 32% 52% groups, while amylase activity reduced markedly 47% group. These...

Integrated rice field aquaculture, a practice normally used by rural small-scale farmers, is not only supporting farms and livelihoods but also reducing poverty playing more important role in China. It becoming one of the main freshwater aquaculture systems, addition to ponds, lakes, reservoirs, streams, other systems. During past 40 years, both production areas integrated China have significantly increased from 0.13 million t 0.74 ha 1990 3.25 2.56 2020, respectively. Advances ecology...

Amid the global surge of eutrophication in lakes, investigating and analyzing water quality trends lakes becomes imperative for formulating effective lake management policies. Water index (WQI) is one most used tools to assess by integrating data from multiple parameters. In this study, we analyzed spatio-temporal variations 11 parameters largest plateau Erhai Lake, based on surveys January 2014 December 2021. Leveraging machine learning models, gauged relative importance different WQI...

Abstract Investigating how multiple invasive fish species with similar ecological traits respond to different environmental conditions is crucial understanding their successful invasion and coexistence. Here, we used stomach content analysis stable isotope analyse the effects of water level fluctuation on trophic niche plasticity three dominant co‐occurring tilapia ( Coptodon zillii , Sarotherodon galilaeus Oreochromis niloticus ) in Shanmei Reservoir, southern China. We found that exhibited...

The paper reports the length–weight relationships of 55 species from Three Gorges Reservoir (TGR) Yangtze River, China, and largest reservoir in world. A total 24,176 specimens were collected July 2012 to January 2015. Length–weight for 33 fish not recorded previously FishBase, maximum lengths computed eight are presented. a values varied between 0.00054 0.01923, b ranged 2.729 3.583. results will be useful application sustainable management conservation these fishes TGR River.

The Danjiangkou Reservoir (DJKR) serves as the water source for world’s biggest diversion project, Middle Route of South-to-North Water Diversion Project (MR-SNWDP) in China, and this project concerns security tens millions people northern China. Hence, maintenance ecosystem health optimization management necessitate studies to assess composition dynamics key aquatic living resources. Zooplankton represent a critical component reservoir are sensitive environmental changes anthropogenic...

To study how fish assemblages changed at different fillings stages, we compared the present (2015–2017; after third filling in 2009) with those from periods prior to impoundment (1975), first closure (1997–2000), (2005–2006), and second (2006–2009) upper, middle lower sections of Three Gorges Reservoir, largest world. Our results demonstrated that species richness was higher upper section than sections, whereas overall damming. The were among associated their specific habitats; i.e.,...

The reproductive biology of three yellow catfish congeners was studied in the Three Gorges Reservoir Yangtze River, China. We compared traits among lentic, transitional, and lotic zones. A total 4502 individuals species collected, sex ratio, size at 50% maturity, spawning season, fecundity, egg were determined. Results showed that populations inhabiting zone spawned earlier than those lentic zone. For species, fecundities significantly higher for transitional zones (P < 0.05). Pelteobagrus...

The construction of the Three Gorges Reservoir (TGR), largest dam in world, created novel spatial and seasonal fluctuations food availability along Yangtze River. We studied changes diet niche overlap three co-occurring catfish species between upper lower sections TGR across four hydrological seasons to investigate whether diets native reflect availability. Zoobenthos dominated section, but shrimp made bulk section. This was case every season except during rising-water when all increased...

With the intensification of eutrophication, many artificial water supply lakes that act as a biological filter for diverted from rivers have been built to alleviate scarcity in Eastern China. In this study, we selected Lake Yanlong, representative lake Yancheng City, our experimental explore how community composition fishes changed among different habitat types and assess potential consequences effective treatment. From October 2015 2020, conducted quarterly surveys fish communities...

The impoundment of the Yangtze River and construction Three Gorges Dam Reservoir created an unnatural flow regime with a 30 m water-level fluctuation four artificial seasons that differ from river's natural flow-regime timing. Using stable isotopes, we selected 15 common benthic fish species representing five trophic guilds to analyze seasonal variation in production sources, niche width, overlap. We hypothesized that, similarly regime, hydrological effectively influence niches. found...

Damming usually modifies riverine habitats, which affects various aspects of fish diversity, especially in a reservoir cascade. Their influence on assemblage has been studied widely, but lack data from the diversity perspective remains. The Gezhouba Reservoir and Three Gorges are two largest cascaded reservoirs located upper Yangtze River. In this study, we investigated current assemblages 2020∼2021 retrieved 22 previous investigations different sections cascade system to analyze how...

Abstract Exopalaemon modestus (Heller, 1862) and Macrobrachium nipponensis (De Haan, 1840) (Palaemonidae) are ecologically commercially important fishery resources in the Three Gorges Reservoir (TGR), China, co-occur demersal habitats. Little information is available on their biology. We compared reproductive traits of both species upper, middle, lower sections TGR. Both differed mean size at maturity, which increased from upper to middle sections. Sex ratios were significantly biased toward...

As aquaculture food production is expected to increase, introduced species play an important role in meeting the rising demand for aquatic products and contributing great societal benefits. Species introduction forces sympatric coexist within same ecosystem by niche segregation. Japanese smelt Hypomesus nipponensis sharpbelly Hemiculter leucisculus are ecologically similar were Lake Bosten, largest inland lake Northwest China, accounting more than 60% of total production. We predicted that...

6目15科56属。各江段以广适性和静水性鱼类为主, 其中库首秭归和支流香溪河下游峡口、小江下游高阳江段的短颌鲚(Coilia brachygnathus)和贝氏䱗(Hemiculter bleekeri)等静水性鱼类相对丰度较高, 库中云阳、库尾巴南和支流嘉陵江下游合川江段的 蛇鮈(Saurogobio dabryi) 和光泽黄颡鱼(Pelteobagrus nitidus) 等广适性鱼类相对丰度较高。非度量多维尺度(non-metric multidimensional scale, NMDS)和Bray-Curtis相异性指数分析表明, 秭归和嘉陵江下游合川江段群落结构差异最大, 香溪河下 游峡口和小江下游高阳江段群落最为相似。Margalef丰富度指数(D

Abstract To understand how riverine fish respond to longitudinally different habitats created by impoundment, we selected three congeneric yellow catfish species ( Pelteobagrus spp.) as a model system assess changes in diet, prey selectivity, and body condition among the lotic, transitional, lentic along Three Gorges Reservoir. Our results add previous findings highlighting shift diets from diverse zoobenthos shrimp‐dominated river becomes showing spatial segregation size of shrimp consumed....