Abstract There is increasing evidence that personality traits may drive dispersal patterns of animals, including invasive species. We investigated, using the widespread signal crayfish Pacifastacus leniusculus as a model species, whether effects on were independent of, or affected by, other factors population density, habitat, size, sex and limb loss, along an invasion gradient. Behavioural (boldness, activity, exploration, willingness to climb) 310 individually marked measured at...

River Choto Jamuna is an important and well-known river in north-west Bangladesh terms of fish production source income for many fishermen living beside where this study has been conducted from January to December, 2012. This revealed the existing species their composition along with diversity, richness evenness indices. A total 63 fishes have recorded belonging 41 genera, 23 families 9 orders. Cypriniformes was as most diversified group both number individuals observed. Of all found, 41.27%...

<title>Abstract</title> The Mekong River, a global freshwater biodiversity hotspot, has suffered from intensive barrier construction, resulting in major challenges safeguarding its fauna. Here, we provide comprehensive evaluation of the impacts river barriers on distribution 1,032 fish species Basin. Our analysis revealed that 93% suffer habitat fragmentation, and with larger range requirements experienced higher fragmentation impacts. Sub-basins along main channel Lower had high values...

ABSTRACT Freshwater habitats are losing their biodiversity more quickly than terrestrial and marine ecosystems, particularly in parts of the tropics with large human populations. Here, we analysed illegal hunting data for globally vulnerable Indian flapshell turtle Lissemys punctata largest wetland Bangladesh. We identified key conservation issues this species, along knowledge attitudes stakeholders (turtle hunters, n = 190; fishermen 60; agriculture farmers fish 60). Compared 2007, catch...

Abstract Worldwide, water regulatory structures have impacts on aquatic ecological connectivity. This study determined the effects of current sluice management fish community in Baral River, a major connection to largest wetland (Chalan Beel) Bangladesh. It also examines wider problems for biodiversity conservation (particularly waterbirds) that wetland, which has shrunk 30% its former dry‐season size 50 years. During flood period, peak breeding time native floodplain fishes, sluices were...

The Padma River is one of the longest rivers and it believed to be an important spawning feeding ground for riverine fish species Bangladesh. This study was conducted from February 2013 January 2014 with a view revealing diversity fauna in river. A total 71 were recorded belonging 10 orders, 26 families 54 genera. most dominant order Cypriniformes contributing 28 16 Cyprinidae family 23 Four alien found. Twenty eight have been considered threatened by IUCN These fishes following categories,...

Barrier removal and fish pass construction are increasingly used as tools to restore river connectivity improve habitat quality, but the effectiveness of subcatchment-scale restoration on recovery communities is poorly understood. We a before-after-downstream-upstream methodology determine effects fishes in fragmented tributary River Wear, Northeast England, between 2013 2019. Following (three barriers removed, five fitted with passes, two unaltered), riffle increased, fine sediment...

The Brahmaputra River is one of the largest rivers in world as well Bangladesh. present study was carried out for a period year from January to December 2013 with view assessing availability fishes river species emphasis on richness, existing threats and conservation issues. Daytime night sampling were three sites located along upstream downstream course monthly basis. Three fishing gears including cast net, seine net drag trap employed collect fishes. A total 67 finfish 63 indigenous 4...

Abstract Impacts of invasive signal crayfish Pacifastacus leniusculus on native species and ecosystems are widely recognised, but mostly through small‐scale studies laboratory experiments that may not always reflect impacts in nature. Recorded effects fish populations equivocal. In this study, using the before–after/control–impact control–impact approaches, invasion fishes, particularly benthic fishes young‐of‐year (YoY) salmonids, macroinvertebrate communities, were determined several...

Abstract River barrier removal is used increasingly as a conservation tool to restore lotic habitat and river connectivity, but evidence of its efficacy incomplete. This study before–after methodology determine the effects removing tidal‐limit on fishes, macroinvertebrates, habitats an English coastal stream. Following removal, diversity increased immediately upstream remained similar downstream. Mobilized silt altered substrate composition downstream, this was temporary flushed out...

The Brahmaputra River is one of the largest rivers in world as well Bangladesh. present study was carried out for a period year from January to December 2013 with view assessing availability fishes river species emphasis on richness, existing threats and conservation issues. Daytime night sampling were three sites located along upstream downstream course monthly basis. Three fishing gears including cast net, seine net drag trap employed collect fishes. A total 67 finfish 63 indigenous 4...

A study on fish drying in Chalan Beel areas was conducted between August 2006 and February 2007. Field survey carried out Atrai, Singra, Tarash, Bhangura Upazilas adjacent to assess the status. Twenty six were used for including five major species large scale remaining mixed with species, mostly of damaged physically. Majority (89.3%) dry farmers brought raw fishes from local markets or landing centers. Washing done by beel water poor quality salts salting (rate: 50-250 g / kg fish) most...

Impacts of ineffective wastewater management on the biodiversity receiving waters in developing countries are poorly documented. Using a before-after-control-impact methodology, we measured effects untreated release fish community Barnoi River, Bangladesh. In 2006, prior to discharge, abundance, species richness and water quality were similar across sampling sites. 2016, after 8 years downstream reach, abundance reduced by &gt;47% &gt;35% respectively at sites compared unaffected upstream...

The fish fauna of the Atrai River were studied for a period two years from January 2011 to December 2012. Sampling was carried out by several fishing nets and traps on fortnight basis. A total 74 species belonging 27 families 52 genera recorded. Cyprinidae most dominant family contributing 18 in 9 genera. Two alien found- Hypophthalmichthys molitrix Hypostomus plecostomus. Thirty locally threatened (Vulnerable 13.51%, Endangered 18.92% Critically 8.11%) But, no globally found. Relative...

This study was carried out in the Mahananda River from January to December 2013 with a view determining seasonal variation and community structure of fishes along some conservation issues. Monthly sampling using traditional fishing gears were identified based on morphometric meristic characters. A total 4082 individuals native fish species captured, analyzed classified into 62 belonging 46 genera, 25 families 9 orders. Cypriniformes Siluriformes dominant orders represented by 19 each most...

This study was carried out in the Mahananda River from January to December 2013 with a view determining seasonal variation and community structure of fishes along some conservation issues. Monthly sampling using traditional fishing gears were identified based on morphometric meristic characters. A total 4082 individuals native fish species captured, analyzed classified into 62 belonging 46 genera, 25 families 9 orders. Cypriniformes Siluriformes dominant orders represented by 19 each most...

Abstract Growing evidence shows that conservation strategies such as fishing bans may adversely affect the livelihoods of low‐income communities, which often encourages community members to fish illegally. In this study, we determined underlying factors influenced fishermen engage in illegal during closed season largest lake Bangladesh, Kaptai Lake. Out 231 interviewed, 46.8% were engaged season. Engagement was positively related receipt a financial loan and negatively government subsidy...

The fish fauna of the Atrai River were studied for a period two years from January 2011 to December 2012. Sampling was carried out by several fishing nets and traps on fortnight basis. A total 74 species belonging 27 families 52 genera recorded. Cyprinidae most dominant family contributing 18 in 9 genera. Two alien found- Hypophthalmichthys molitrix Hypostomus plecostomus. Thirty locally threatened (Vulnerable 13.51%, Endangered 18.92% Critically 8.11%) But, no globally found. Relative...

This study was conducted in Rajshahi and Natore districts of northern area Bangladesh for a period three years (2007 to 2009). One hundred carp ponds were selected randomly fish farmers interviewed reveal the existing constraints prospects. Ten percent reported multiple ownership as problem 16% stated that lease value pond is too high which reducing their profit level. Lack quality seeds by 33% results low growth mortality fishes. Nine inorganic fertilizers not giving expected performances....