Journal of Animal Diversity
مجله تنوع جانوری
JAD
Basic Sciences
http://jad.lu.ac.ir
1
admin
2676-685X
2676-685X
10.61186/JAD
en
jalali
1399
12
1
gregorian
2021
3
1
3
1
online
1
fulltext
en
Correlation of fish assemblages with habitat and environmental variables in the Phewa Khola Stream of Mangsebung Rural Municipality, Ilam, Nepal
Ecological Diversity
مقاله پژوهشی اصلی
Original Research Article
<div style="text-align: justify;"><span style="color:#000000;"><span style="font-size:14px;">We assessed the correlation of fish assemblages with habitat and environmental variables temporally from July and October, 2019 and January and April, 2020 across 5 study sites in the Phewa Khola stream of Mangsebung Rural Municipality, Ilam, Nepal. We sampled 3571 fish representing 13 species, belonging to 3 orders, 4 families, and 9 genera. An analysis of similarity (ANOSIM) indicated that there is a significant difference between the fish assemblage structure in space (<em>R</em>= 0.833, <em>P</em>= 0.001) but not in time (<em>R</em>= -0.148, <em>P</em>= 0.985). Our habitat study showed that glides, runs, pools and deep pools are the primary habitats contributing to the maximum diversity in the Phewa Khola stream. The canonical correspondence analysis (CCA) affirmed that variables such as pH, water temperature, water velocity, total hardness and dissolved oxygen play an important role in shaping fish species distribution. Results from the similarity percentage analysis (SIMPER) hinted that, 67.08% similarity was found between the months and the major contributing species were <em>Schistura multifasciata </em>(20.61%), <em>Devario aequipinnatus</em> (16.48%), <em>Schistura rupecula</em> (15.65%), <em>Garra annandalei </em>(15.36%), <em>Schistura horai</em> (7.74%), <em>Schistura scaturigina</em> (5.91%), <em>Schistura </em><em>savona</em> (5.74%), <em>Schizothorax plagiostomus</em> (4.37%), <em>Channa punctata</em> (3.9%), <em>Puntius terio</em> (1.9%) and <em>Neolissochilus hexagonolepis</em> (1.39%). On the contrary, a 76.23% similarity was found between the sites and the major contributing species were <em>Schistura multifasciata</em> (21%), <em>Devario aequipinnatus </em>(16.8%), <em>Garra annandalei</em> (15.89%), <em>Schistura rupecula</em> (15.38%), <em>Schistura horai</em> (7.7%), <em>Schistura scaturigina</em> (5.66%), <em>Schistura </em><em>savona</em> (4.9%), <em>Schizothorax plagiostomus</em> (4.4%), <em>Channa punctata</em> (3.97%), <em>Puntius terio</em> (2%) and <em>Neolissochilus hexagonolepis</em> (1.43%). Ongoing road development, micro-hydropower generation, the use of poisonous herbicides, illegal electro-fishing, deforestation and water diversion are all found to be major threats to the present fish species of the Phewa Khola stream.<br>
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Fish diversity, Falgunanda, habitat, stream, spatio-temporal
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36
http://jad.lu.ac.ir/browse.php?a_code=A-10-125-1&slc_lang=en&sid=1
Jash Hang
Limbu
limbujash@gmail.com
10031947532846001371
10031947532846001371
Yes
Nature Conservation and Health Care Council, Biratnagar, Nepal
Suren
Subba
surensubba35@yahoo.com
10031947532846001372
10031947532846001372
No
Dhankuta Multiple Campus, Tribhuvan University, Dhankuta, Nepal
Jeevan Kumar
Gurung
jeevanpost@gmail.com
10031947532846001373
10031947532846001373
No
Damak Multiple Campus, Tribhuvan University, Damak, Jhapa, Nepal
Jawan
Tumbahangfe
jawansubba37@gmail.com
10031947532846001374
10031947532846001374
No
Central Department of Zoology, Tribhuvan University, Kirtipur, Kathmandu, Nepal
Bharat Raj
Subba
subbabharatraj@gmail.com
10031947532846001375
10031947532846001375
No
Post Graduate Campus, Tribhuvan University, Biratnagar, Nepal