A global dataset on species occurrences and functional traits of Schizothoracinae fish

Scientific Data, Journal Year: 2024, Volume and Issue: 11(1)

Published: March 6, 2024

Abstract The Schizothoracinae fish are a natural group of cyprinids widely distributed in rivers and lakes the Qinghai-Tibetan Plateau (QTP) adjacent regions. These parallelly evolved with QTP uplift thus important for uncovering geological history, paleoclimatic environment, mechanisms functional adaptation to environmental change. However, dataset including species occurrences traits, which essential resolving above issues guiding relevant conservation, remains unavailable. To fill this gap, we systematically compiled comprehensive on traits from our long-term field samplings various sources (e.g., publications online databases). includes 7,333 occurrence records 3,204 32 covering all genera (i.e., 12 125 or subspecies). Sampling spanned over 180 years. This will serve as valuable resource future research evolution, historical biogeography, responses change, conservation fish.

Language: Английский

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Estimated Hydraulic Characteristics and the Entrainment of Fish Eggs and Larvae at a Pumped River‐Water Intake

Water Resources Research, Journal Year: 2025, Volume and Issue: 61(2)

Published: Feb. 1, 2025

Abstract Withdrawal of fish eggs and larvae through a river intake (entrainment) may damage the river's early resources. To investigate how hydraulics (flow velocities, directions, magnitudes) around within water structure influence entrainment, this study focused on typical river‐pump intake. A turbulence model was developed based Euler‐Lagrange method variable helicity introduced to define zone from which is withdrawn organisms are entrained. The process simulated organism withdrawal validated by physical experiments using artificial under various flow conditions. results indicated that when intake‐to‐river ratio ranged 3 7‰, width planar entrainment area approximately 1.2 1.4 times structure, quantity accounted for 0.12% 0.49% incoming flux. increased with ratio. absolute threshold different conditions 0.004 0.047 m/s 2 , inversely proportional rate unaffected depth. An optimized design stepped side walls promoted, can minimize impact sedimentation reduce an average 11%. This research provides valuable insights safety resource protection.

Language: Английский

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Proposal for Ecological Operation of Cascade Reservoirs to Safeguard Reproductive Migration and Egg Development in Drifting-Egg Fish

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 145154 - 145154

Published: Feb. 1, 2025

Language: Английский

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Assessing fish taxonomic and functional β diversity to inform effective conservation strategies in a large reservoir of the Yangtze River Basin

Water Biology and Security, Journal Year: 2025, Volume and Issue: unknown, P. 100407 - 100407

Published: April 1, 2025

Language: Английский

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Troubled waters in the land down under: Pervasive threats and high extinction risks demand urgent conservation actions to protect Australia's native freshwater fishes

Biological Conservation, Journal Year: 2024, Volume and Issue: 300, P. 110843 - 110843

Published: Nov. 9, 2024

Language: Английский

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Conservation and Population Status of Freshwater Fishes from Kelekar River, South Sumatra, Indonesia

International Journal of Current Science Research and Review, Journal Year: 2024, Volume and Issue: 07(02)

Published: Feb. 17, 2024

This study assessed the conservation and population status of fish species collected from Kelekar river. was conducted between May 2022 June 2023. A total 1.267 belonging to 49 19 families were recorded. Cyprinidae found be richest family (18 species) followed by Osphronemidae (5 species), Channidae (4 Siluridae (3 Bagridae, Claridae, Pangasidae, Pristolepidae (2 others (1 species). The Shannon-Weiner diversity index 3.547. Simpson’s dominance 0.035, Evenness 0.921. biodiversity river in high category. Base on latest IUCN red list, one as data deficient, forty-three least concern, two near threatened, vulnerable, critically endangered. based present River unknown (35%), stable (47%), decreasing (18%).

Language: Английский

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Research advances in diversity and conservation science of freshwater fish in China

Journal of Fish Biology, Journal Year: 2024, Volume and Issue: 104(2), P. 343 - 344

Published: Feb. 1, 2024

In China, as elsewhere, freshwater fishes are facing considerable threats due to climate change and anthropogenic activities, including habitat modification, water pollution, over-fishing, non-native fish introductions (Best, 2019; Feio et al., 2023). As a result, the taxonomic, genetic, functional diversities of in China have been negatively impacted. To fulfill China's Biodiversity Conservation Strategy Action Plan (2011–2030), it is important comprehensive understanding aquatic ecosystems especially with regard threatened species protected areas. This essential inform management strategies mitigate impacts on critical fauna protect conserve endemic native species. special issue includes two papers dealing diversity at national regional scale, four regarding new taxa or records fishes, five studies about life history general biology focused technologies fisheries conservation. The third Red List assessment Chinese was conducted recently results published by Zhang Cao (2021); checklist updated but limited case no recommendations for conservation fishes. al. (2024) provided an overview their status based work (2021), they highlighted challenges attempts using suggestions improve ecosystems, thereby Functional biodiversity impact exotic local rarely evaluated thoroughly riverine scale. Lin study schemed mechanistic model reveal Minjiang River, largest river southeastern suggested that altered community significantly if accounted 2% total ecosystem. About 1591 were recorded up until end 2020, 20 described annually (Cao 2024). However, both numbers must be underestimate, rare upstream areas rivers most remote. describing records, taxa, phylogeny (Guo, Cao, (2024); Hu 2024; Li Luo Guo, Leptobotia spp. upper Qiantang-Jiang River where very much underestimated. Morphological molecular approaches used describe cave species, Sinocyclocheilus xingyiensis southwest part (Luo 2024), confirm record Schizothorax richardsonii southern slope Central Himalayas surveys (Li quaternary climatic oscillation, conjunction ecological traits lineage diversification time, shaped contemporary phylogenetic patterns stone loaches Himalayas. Five this focus ecotoxicology China. Life-history Japanese eels Anguilla japonica remain poorly understood. Shuai 6-year study, expanding knowledge life-history preferences Pearl implications eel habitat. Qin reported interpopulation ontogenetic trophic niche shifts mangrove predator Acentrogobius viridipunctatus role plasticity dynamic ecosystems. environmental biological condition Chang-Jiang great concern Yimer studied commercially Coilia brachygnathus Lake Honghu found had short span, early sexual maturity, relatively fast growth rate, which resources lakes situated middle lower reaches River. He investigated key critically endangered Ptychidio jordani, not known previously strategy policy development. Chu, safe concentrations common biocides, copper, zinc, methylene blue treat disease such Brachymystax tsinlingensis, benefited from resource protection restoration measures. New develop sustainable effective strategies. Shen developed automatic image-processing programme automatically track count technique fuses K-nearest neighbor background subtraction DeepSort target tracking, could replace time-consuming semi-automatic efficiency imaging sonar data processing. negative effect dam construction, Song Xie substratum roughening swimming capacity, oxygen consumption, behavior wangchiachii, indicated performance improved presence rough energetic costs fish.

Language: Английский

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Troubled Waters in the Land Down Under: Pervasive Threats and High Extinction Risks Demand Urgent Conservation Actions to Protect Australia's Freshwater Fishes

Published: Jan. 1, 2024

We conducted the first comprehensive assessment of extinction risk Australia's freshwater fishes. Using International Union for Conservation Nature (IUCN) criteria, 37% (88 species) 241 assessed species were threatened (Critically Endangered, Endangered or Vulnerable), with one as being Extinct. Lepidogalaxiidae and Neoceratodontidae had highest level threat (100%, both single families), followed by Galaxiidae (78% 40 species), Percichthyidae (62% 22 Melanotaeniidae (53% 19 species). Northern Australia supported greater richness, while a concentration occurred in more human-populated areas across southern eastern drainage divisions, including South West Coast (55% threatened), Tasmania (54%) East Victoria (45%). Most fishes qualified listing based on their restricted geographic ranges (Criterion B: 70% all assessments; Criterion D2: 7%) although population size reduction A) was identified 21% assessments. Key threats to included invasive other problematic native species, genes diseases (92% threatened, Near Threatened Data Deficient natural system modifications (82%), climate change severe weather (54%). Despite high risk, implemented conservation measures are presently very limited. This study highlights imperiled nature Australian emphasises that targeted urgently needed avoid imminent extinctions.

Language: Английский

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Investigation on the Distribution of Bangana Tungting in Yuanshui Unique Fish Species National Aquatic Germplasm Resources Reserve Using Environmental DNA Technology

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(12)

Published: Dec. 1, 2024

ABSTRACT Freshwater ecosystems face unprecedented challenges as the cumulative impact of human activities intensifies. While protected areas and species‐specific conservation policies are widely implemented, their effectiveness remains difficult to gauge using traditional catch‐based surveys. This research employed environmental DNA (eDNA) technology assess distribution endangered fish, Bangana tungting , within Yuanshui Unique Fish Species National Aquatic Germplasm Resources Reserve (YUFRR) in Hunan, China. Over a 2‐year period, we conducted comprehensive eDNA survey multiple sites YUFRR, confirming species' continued existence area. In September 2022, B. was detected at 8 60 sampling locations, while follow‐up May 2023 identified its presence 4 44 sites. Further analysis revealed critical factors influencing distribution, primarily dissolved oxygen concentration physical barriers such hydroelectric stations. Our data suggest minimum tolerance threshold mg/L for this species. Moreover, observed an inverse relationship between detection rates both number stations distance case study demonstrates mapping fish species like guiding strategies. findings emphasize crucial need enhance conditions, particularly water quality habitat suitability, ensure effective YUFRR.

Language: Английский

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Prospects for conserving freshwater fish biodiversity in the Anthropocene: A view from Southern China

Integrative Conservation, Journal Year: 2024, Volume and Issue: 3(4), P. 294 - 311

Published: Dec. 1, 2024

Abstract Globally, population declines of freshwater animals have been consistently greater than counterparts in other realms, making fresh waters hot spots endangerment—particularly for larger species. Furthermore, biotas become increasingly homogenized as invasions by non‐native species proceed. These trends are particularly evident Anthropocene China, where humans profoundly altered ecosystems, with serious consequences fishes and aquatic vertebrates. Here, I examine the prospects ‘bending curve’ or reversing trend fish biodiversity loss focusing on examples from Yangtze further south. Much China's rich is threatened, but a lack contemporary surveys means that conservation status many uncertain, ~40% data deficient. Although nutrient pollution major rivers has abated recently, poor water quality remains concern, widespread proliferation emerging contaminants microplastics can be expected to unpredictable (but detrimental) effects biota. Warmer temperatures will exacerbate toxicity micropollutants, facilitate spread supplanting native fishes. Extensive dam construction fragmented rivers, blocked migrations, preventing access spawning sites leading extirpations. Dams limit ability adjust their ranges compensate global warming, increased drought severity frequency under climate change representing an existential threat. Overexploitation reduced recent introduction 10‐year fishing ban basin, dams, flow regulation, continuing habitat degradation stymie any recovery significant result ban. captive breeding release programmes failed restore populations threatened because management stock allowed inbreeding hybridization genetic wild populations. Other anthropogenic activities, such large‐scale mining river sand flood plain—exacerbated sediment‐trapping upstream dams—are persistent obstacles China.

Language: Английский

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