Morphological Difference Analysis of Triplophysa strauchii from Different Geographical Populations in Xinjiang, China

Water, Journal Year: 2025, Volume and Issue: 17(4), P. 467 - 467

Published: Feb. 7, 2025

Spotted stone loach (Triplophysa strauchii), a common fish species in Xinjiang, China, is ecologically pivotal within the local ecosystem; regrettably, human-induced factors like habitat destruction, pollution, and overfishing have gravely imperiled its survival, compounding this dearth of research on morphological disparities among geographically diverse populations. Thus, between April October 2024, 198 specimens were procured from Sayram Lake, Khamusigou Reservoir, Chaiwopu Lake using cage traps gillnets; post-collection, an array metrics meticulously measured, then statistical methods such as one-way analysis variance (ANOVA), principal component (PCA), stepwise discriminant analysis, cluster employed for comprehensive data interrogation. Findings show that, across all sampled populations, mean values total length (X1), body (X2), height (X3), width (X4) population are significantly lower than those Reservoir population; except head length, has variability other traits compared to others. Moreover, significant divergences detected multiple trait ratios populations; PCA yielded five components, cumulatively accounting 77.45% variance, spotlighting key ratios; further validated highly distinctions (p < 0.01), with having highest accuracy; graphically showed populations clustering together while formed separate cluster; had most pronounced divergence traits. This not only provides novel perspectives adaptive evolutionary mechanisms T. strauchii but also serves cornerstone formulating evidence-based conservation management strategies species.

Language: Английский

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Conservation threats and future prospects for the freshwater fishes of Ecuador: A hotspot of Neotropical fish diversity

Journal of Fish Biology, Journal Year: 2021, Volume and Issue: 99(4), P. 1158 - 1189

Published: July 8, 2021

Freshwater fish communities in Ecuador exhibit some of the highest levels diversity and endemism Neotropics. Unfortunately, aquatic ecosystems country are under serious threat conditions deteriorating. In 2018-19, government sponsored a series workshops to examine conservation status Ecuador's freshwater fishes. Concerns were identified for 35 species, most which native Amazon region, overfishing Amazonian pimelodid catfishes emerged as major issue. However, much information needed make decisions across groups regions was not available, hindering process highlighting need review threats Here, we how physical alteration rivers, deforestation, wetland floodplain degradation, agricultural urban water pollution, mining, oil extraction, dams, overfishing, introduced species climate change affecting fishes Ecuador. Although many these factors affect throughout Neotropics, lack data on Ecuadorian is staggering highlights urgent more research. We also recommendations, including proper enforcement existing environmental laws, restoration degraded ecosystems, establishment national monitoring system investment research fill gaps knowledge, encouragement public engagement citizen science efforts. an important component cultural biological legacy people. Conserving them future generations critical.

Language: Английский

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Abiotic and biotic factors influencing heavy metals pollution in fisheries of the Western Amazon

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 908, P. 168506 - 168506

Published: Nov. 12, 2023

The escalating industrial and artisanal extraction of natural resources in the Amazon Basin has centered it into spotlight global environmental concern. This study deals with problems heavy metals pollution biomagnification, which stem from mining, agricultural, petrochemical, discharges. We conducted an extensive investigation, analyzing 360 fish specimens representing 58 species, to assess concentrations 11 (Al, As, Cd, Cr, Cu, He, Mn, Ni, Pb, Zn, Hg) along Ecuadorian sections Napo Pastaza watersheds. Stable isotope analyses (δ15N δ13C) were employed determine their trophic positions potential biomagnification risks. Sampling was carried out during two distinct hydrological seasons capture seasonal variations metal concentrations. Furthermore, we estimated species-specific daily intake levels. results our revealed that 15 species 53 individual exhibited surpassing recommended standards, elevated levels Al, Hg posing significant risks human consumers intakes 0.46 kg/day. Notably, investigation unveiled concerning trends, including increased concentrations, within populations watershed, association between smaller size higher content. provides a crucial baseline for monitoring future changes understanding persistent impacts region broader Western Amazon. It underscores urgent need sustainable management practices mitigate threat these vital ecosystems.

Language: Английский

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Exceptional concentration of fish diversity in Yasuní National Park, Ecuador (Napo River Basin)

Biodiversity Data Journal, Journal Year: 2025, Volume and Issue: 13

Published: March 13, 2025

Despite limited access and rather deficient sampling in many lowland areas of eastern Ecuador, scientists have been able to demonstrate that this specific region Amazonia houses extraordinarily high concentrations species within several taxa – terrestrial aquatic, plant animal, vertebrate invertebrate. In work, we developed an updated list the ichthyofauna Yasuní National Park (YNP), based on extensive literature review databases most representative ichthyological collections from Ecuador. Our results yielded 458 freshwater fishes distributed 47 families 13 orders. This number exceeded previous fish lists YNP accounts for a considerable proportion inhabiting Napo River Basin as well entire Amazon Basin. The higher-than-previously-reported diversity protected area, services these provide humans absence invasive underscore need greater efforts investment protecting managing western Amazonian lands waters.

Language: Английский

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Fish Ecology and Hydrological Responses to a Run-of-River Hydroelectric Project in Ecuador

Fishes, Journal Year: 2025, Volume and Issue: 10(4), P. 143 - 143

Published: March 21, 2025

Hydropower development is rapidly expanding in biodiversity-rich regions like the Ecuadorian Andes, raising major concerns about its ecological impacts. This study evaluates fish species composition and habitat characteristics Cristal Dulcepamba Rivers, with a particular focus on effects of San José del Tambo Hydroelectric Project River. Sampling conducted during dry season (November–December 2023) at 15 sites incorporated surveys, analyses, environmental quality evaluation. The results showed marked declines abundance, richness, diversity sections River directly affected by water diversions, richness reduced to only three site most impacted discharge reduction. Conversely, River, unaltered hydrology, supported considerably greater diversity, including 12 one site. Environmental integrity indices (Andean–Amazon Biotic Index, Biological Monitoring Working Party Andean Riparian Quality Fluvial Habitat Index) further underscored River’s superior conservation status. In flow Project—below mandated levels—led river drying, disrupted connectivity, impaired migration. provides essential insights into these highly biodiverse yet poorly studied ecosystems, which are increasingly threatened anthropogenic pressures. findings highlight critical need reconcile energy efforts vulnerable environments.

Language: Английский

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Rights of Nature in Ecuador

IGI Global eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 245 - 272

Published: April 4, 2025

In this work we will analyze as an objective the legal approach regarding rights of nature in Ecuador. For development work, have proposed to investigate historical sources, current Constitution, environmental documentaries, theses, articles, and everything that is reliable topic question, therefore, at same time exposing novelties found research performed. The Constitution Ecuador 2008 first world explicitly recognize a subject law, accepting its essential value regardless benefit. country it was constant struggle environmentalists protectors, who after achieving inclusion articles with which can be protected, feel their achievement progress for purpose caring environment. It has been confirmed these laws had effect although cannot turn back stop damage caused our ecosystem, are doing something so descendants breathe fresh air, through projects certain insti

Language: Английский

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Aquaculture and Fisheries as a Food Source in the Amazon Region - A Review

Food & Nutrition Journal, Journal Year: 2024, Volume and Issue: 9(1)

Published: Feb. 2, 2024

Abstract This is a review of the importance inland water fisheries and fish farming as food source in Amazon basin. Small-scale resources have been depleted climate change poses growing threat, failure to address issues confronting sector places safety livelihoods millions people at risk. The governments should form partnerships with communities for them assist managing resources. fishers would gain this co-management but also assume responsibility their decisions actions. Co-management always far better than no-management. From landings, trade, consumption fish, it has estimated that total catch basin above half million tonnes/year live weight. However, figure very rough given 75 per cent represented landings come from Brazil no updated official statistics after 2010 on commercial landings. Aquaculture offers largest potential increase supplies long term rapid growth unevenly distributed among countries. Three major aquaculture producers are Ecuador, Colombia some Peru. development region facing many challenges including combat against diseases epizootics, need hatchery grow-out technology, brood stock improvement, appropriate most economic feed production water-quality management. paper pays attention unwanted spread alien species often escapees aquaculture. Annual capita kg/capita countries varies between 2.6-25.3 kg/year, three leading being Guyana, Peru Suriname. fairly low compared European Union global averages which around 27 22 kg/capita/year, respectively. all Amazonian countries, 50 up almost 100 artisanal freshwater fishing takes place personal consumption, implying may not be fully recorded statistics. Ornamental culture trade had an important role biggest exporters aquarium Brazil, In 2008 crisis hit started decline ornamental trade. One reason decrease was competition neighbouring less bureaucratic systems fewer restrictions can exported. International pressure stop commerce wild-caught intensified husbandry practices reproduction Southeast Asia caused downturn Brazilian market. Thousands families lost fishermen were forced start working sport fisheries. Sport hobby those whom money or main object more get good photo together big fish. practising release system so away nature activity income tourism benefits local remote rural areas. Free-time significant national economy high value social recreational terms walks life.

Language: Английский

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Mercury in aquatic ecosystems of two indigenous communities in the Piedmont Ecuadorian Amazon: evidence from fish, water, and sediments

Ecotoxicology, Journal Year: 2024, Volume and Issue: 33(4-5), P. 440 - 456

Published: June 7, 2024

Mercury is a highly toxic element present in water, soil, air, and biota. Anthropogenic activities, such as burning fossil fuels, mining, deforestation, contribute to the presence mobilization of mercury between environmental compartments. Although current research on pathways has advanced our understanding risks associated with human exposure, limited information exists for remote areas high diversity fauna, flora, indigenous communities. This study aims deepen total sediments, fish, within aquatic ecosystems two territories: Gomataon (Waorani Nationality) Sinangoé (Ai´Cofán Ecuadorian Amazon. Our findings indicate that, most fish (91.5%), sediment (100%) water (95.3%) samples, levels fall under international limits. For no significant differences were detected However, eight species exceeded recommended global limits, one surpassed threshold according legislation. Piscivore omnivore exhibited highest concentrations among trophic guilds. Only sample from each community's territory these Total sediments greater than Sinangoé. Greater occurrence organic carbon. Considering that members communities consume analyzed an interdisciplinary approach, including isotopic analysis, methylmercury sampling humans, monitoring over time, imperative detailed risk assessment exposure Amazonian

Language: Английский

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Seasonally Flooded Landscape Connectivity and implications for fish in the Napo Moist Forest: A High-Resolution Mapping Approach

Global Ecology and Conservation, Journal Year: 2024, Volume and Issue: unknown, P. e03257 - e03257

Published: Oct. 1, 2024

Language: Английский

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River Geomorphology and Fish Diversity Around the Manseriche Gorge, the Last Andean Crossing Is in Peril

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(11)

Published: Nov. 1, 2024

Abstract The transition from the Andes to Amazon lowland hosts a high biodiversity and currently is facing several anthropogenic activities, including hydropower infrastructure projects. Little known about geomorphology of Andean gorges, rivers interaction with fish diversity upstream downstream gorges. Marañón River major river that connects it carries 40% sediment load arriving Brazil. Santiago last tributary into before gorge (Manseriche). Current plans for reservoirs include construction dams along River, being largest 4,500 MW capacity at Manseriche Gorge (MG). This study seeks characterize baseline processes hydrogeomorphology diversity. Results show under transitional morphodynamic regime while fully developed anabranching river. reveals clear difference in species richness abundance between regions MG, some only found specific regions. MG acts as natural boundary condition If dam was built, reservoir reach will produce disappear sedimentation occur, consequently modifying transport conditions lower River. Downstream potential incision reducing lateral connectivity, particularly sites where unique were found.

Language: Английский

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