scholarly journals Diversity, Distribution and Conservation of Fishes in Lakes of Pokhara Valley, Nepal

ZOO-Journal ◽  
2019 ◽  
Vol 5 ◽  
pp. 32-40
Author(s):  
Ganesh Timilsina ◽  
Subash C Bastola ◽  
Sherman Gurung ◽  
Kishor K Pokharel
Keyword(s):  
Agricultural Practices ◽  
Domestic Sewage ◽  
Fish Diversity ◽  
Population Status ◽  
Brachydanio Rerio ◽  
Fish Ladder ◽  
Gill Net ◽  
Lentic Ecosystem ◽  
Pokhara Valley ◽  
Tor Tor

Present study deals with fish diversity along with management aspects of lakes in Pokhara Valley. It was conducted during September 2009 to February 2010. Monthly fish sampling was done using gill net with the help of experienced fishermen. Altogether 34 species of fishes were recorded in the present study. The population status of important fish species viz., Tor Tor (Hamilton- Buchanan) was found to be endangered, that of Tor putitora (Hamilton-Buchanan), Neolissocheilus hexagonolepis (Mc Clelland), Chagunius chagunio (Hamilton-Buchanan), and Brachydanio rerio (Hamilton-Buchanan) were found to be vulnerable (VU); five species were uncommon (UN) and 24 species were common (C) including common exotic(C*). The lakes were found to be influenced by human activities such as direct disposal of domestic sewage, unscientific agricultural practices, construction of dams without fish ladder or passes, deforestation causing soil erosion etc., which were creating threat to the lentic ecosystem.

scholarly journals Anthropogenic impacts on Keshalia River, Eastern Nepal

2017 ◽  
Vol 7 (1) ◽  
pp. 105-111
Author(s):  
Jay Narayan Shrestha
Keyword(s):  
Anthropogenic Impact ◽  
Anthropogenic Impacts ◽  
Industrial Effluents ◽  
Fish Diversity ◽  
Dam Construction ◽  
Fish Ladder ◽  
Very High

The anthropogenic impact on Keshalia river, especially on fish diversity, is very high. Over fishing with unconventional fishing methods, disposal of domestic and industrial effluents, excess use of pesticides, dumping sites of municipalities, dam construction without fish ladder across the river and mining of sands and gravels are major anthropogenic impacts on the river.

scholarly journals Study on Fish Ecology of the Seti Gandaki River Pokhara: II. Spatio-Temporal Variations in Fish Communities

2012 ◽  
Vol 12 ◽  
pp. 350-357 ◽  
Author(s):  
KK Pokharel
Keyword(s):  
Winter Season ◽  
Temporal Variations ◽  
Urban Site ◽  
Total Density ◽  
Brachydanio Rerio ◽  
Upstream Site ◽  
Longitudinal Pattern ◽  
Total Fish ◽  
Spatio Temporal ◽  
Pokhara Valley

Present paper deals with the spatio-temporal variations in distribution and abundance of fishes along the 30 km stretch of the Seti Gandaki river and its two major tributaries, Mardi Khola and Vijaypur Khola, in Pokhara Valley, Western Nepal. A total of 30 species of fishes belonging to 5 orders, 9 families and 22 genera were recorded from five sites on the river and its tributaries. Cyprinoids were predominant among fishes (17 spp.), siluroids (5 spp.), balitorids and cobitids (4 spp.), channioids (2 spp.), belonoids (one sp.) and mastacembeloids (one sp.). Among cyprinoids, mostly cyprinines were dominant groups (7 spp.) followed by rasborines (7 spp.), garrines (2 spp.) and schizothoracines (one sp.). There was increasing trend of species richness at upstream site (17 spp.). to downstream site (20 spp.) showing a longitudinal pattern. The total fish abundance and family-wise abundance at all the sites observed major peak during the spring and fall during the winter season in both the years of study. The average total density of fishes during the spring peak was highest (51.07/ha) at the upper tributary site and lowest (24.69/ha) at the urban site. According to the distribution pattern and abundance, the population status of the gamefish, mahseer [Tor tor (Ham)] has been endangered (E); that of game fishes [Tor putitora (Ham.) and Chagunius chagunio (Ham.)] and Zebra-fish [Brachydanio rerio (Ham.)] to are vulnerable (V); that of loach [Lepidocephalus guntea (Ham.)], cat-fishes [Myersglanis blythii (Day) and Amblyceps mangois (Ham.)] are rare (R).DOI: http://dx.doi.org/10.3126/njst.v12i0.6523 Nepal Journal of Science and Technology 12 (2011) 350-357

scholarly journals Freshwater fish diversity in three tributary streams in Serayu Basin, Central Java, Indonesia

2020 ◽  
Vol 21 (12) ◽  
Author(s):  
Suhestri Suryaningsih ◽  
Dian Bhagawati ◽  
Sri Sukmaningrum ◽  
Sugiharto Sugiharto ◽  
Ayu ratna I gusti agung
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Fish Diversity ◽  
Random Group ◽  
Freshwater Fish Species ◽  
Central Java ◽  
Gill Net ◽  
Southern Central ◽  
Temporal And Spatial ◽  
Fish Species Diversity

Abstract. Suryaningsih S, Bhagawati D, Sukmaningrum S, Sugiharto, Puspitasari IGAAR. 2020. Freshwater fish diversity in three tributary streams in Serayu Basin, Central Java, Indonesia. Biodiversitas 21: 5811-5817. Determining the diversity of freshwater fish species in Central Java, Indonesia has been confounded by temporal and spatial limitations in past studies. The Serayu Basin is a large watershed in Central Java that is believed to have high freshwater fish diversity. We aimed to determine the diversity and community structure of freshwater fish species in three tributaries of the Serayu, elucidate the factors influencing this diversity, and determine the extent to which these tributaries contribute to the total freshwater fish species richness for southwest Central Java. We conducted gill net sampling from May to August 2018 on the Tulis, Mrawu, and Kali Sapi Rivers located at Banjanegara district Sampling followed a random group technique in upstream, midstream, and downstream river sections of each tributary. In total, we observed 21 freshwater fish species. Broadly, fish species diversity was relatively low in the study area, and water temperature and dissolved oxygen were important in maintaining fish diversity. These three tributaries house 27–46% of the freshwater fish species reported for southern Central Java.

scholarly journals Water quality and fish diversity in Korotoa River of Bogura, Bangladesh

2020 ◽  
Vol 32 (1) ◽  
pp. 60-72
Author(s):  
SAMINA AHATUN ◽  
MD. SIRAJUL ISLAM ◽  
MD. HUMAYUN KABIR ◽  
MAUSUMI REHNUMA ◽  
MD. ENAMUL HOQ
Keyword(s):  
Water Quality ◽  
River Water ◽  
Fish Species ◽  
Physicochemical Parameters ◽  
Industrial Effluent ◽  
Domestic Sewage ◽  
Fish Diversity ◽  
Quality Degradation ◽  
Water Fish

The study was conducted to explore the physicochemical parameters of water, fish diversity andfisheries resources of Korotoa River at Bogura city of Bangladesh during July 2015 to February 2016. Thewater samples were collected from five sampling stations in the Korotoa River during wet and dry seasons.The results of the study showed that temperature, EC, TDS, DO, BOD, alkalinity, acidity and total hardnessof the Karotoa River water were 25.86ºC, 297.41 ?S/cm, 98.86 mg/L, 2.17 mg/L, 2.64 mg/L, 122.05mg/L, 3.28 mg/L and 75.59 mg/L, respectively. The DO and BOD contents of the river water were foundunsuitable for fisheries when compared with the standard of DoE. A total of ten fish species under six ordersand seven families were identified during the study period. The study also revealed that the most remarkablecause of water quality degradation of the river was waste dumping (58%) followed by urbanization and riverbank erosion. The water quality degradation (46%) negatively influenced the abundance of fish species. Theresults concluded that the water quality of the river is not favorable for production of fishes and other aquaticorganisms. The study suggested that the source of water quality degradation should be closely monitoredtogether with the industrial effluent and/or domestic sewage discharge should be reduced or stopped throughthe initiatives of the local government concerned to maintain sound and healthy ecosystem of the river.

scholarly journals Ichthyofauna of Fakfak, Papua – Indonesia

2021 ◽  
Vol 322 ◽  
pp. 01013
Author(s):  
Henderite L. Ohee
Keyword(s):  
Initial Data ◽  
Freshwater Fish ◽  
Fish Community ◽  
Fish Abundance ◽  
Fish Diversity ◽  
Widespread Distribution ◽  
Streams And Rivers ◽  
Restricted Distribution ◽  
Gill Net ◽  
Fish Collection

Fakfak and Kumawa Mountains are located in Bomberay Peninsula, Papua, a poorly known ichthyological record and was recommended by Conservation International for field inventory. This research was conducted from 6-15 February 2021 to document freshwater fish diversity in northern and eastern Fakfak toward Bomberay District. The fish was collected from creeks, streams, and rivers. The fish collection was done once in each location, mainly using a seine net, while a gill net was used in a few sites along Ubadari River. It was done for four hours, netting in one to three locations each day. Fish abundance was described based on common (C), occasionally (O), dan rare (R) scales. Freshwater fish data were descriptively identified. Twenty-two native New Guinean species belonging to 19 genera and 14 families were collected during the survey. There was no specific family dominant in the fish community. All fish recorded have widespread distribution, yet only one species has restricted distribution in the Vogelkop and Bomberay Peninsulas. One rainbowfish species was observed but not properly identified. This results as initial data of the fish community of Bomberay Peninsula, especially of Fakfak. Further research is needed to reveal the fish community from another part of the peninsula.

scholarly journals KERAGAMAN SUMBERDAYA IKAN NON TARGET PERIKANAN RAJUNGAN DI PESISIR LAMPUNG TIMUR

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Zairion Zairion ◽  
Iya Purnama ◽  
Yusli Wardiatno
Keyword(s):  
Species Diversity ◽  
Fish Diversity ◽  
Swimming Crab ◽  
Gill Net ◽  
Target Fish

Abstrak— Penelitian ini dilakukan dengan tujuan untuk mengidentifikasi keragaman dan komposisi ikan non-target perikanan rajungan dengan alat tangkap jaring insang dasar. Sampel dikumpulkan dari bulan Juni hingga Oktober 2017 di Labuan Maringgai dan Kuala Penet, Pesisir Timur Lampung. Hasil penelitian menunjukkan 21 ikan non-target yang diidentifikasi di Labuan Maringgai dan Kuala Penet memiliki kesamaan spesies. Labuan Maringgai, 15 spesies (11,40%) ikan non-target termasuk retained species dimanfaatkan untuk konsumsi atau dijual kembali dan 6 spesies (0,89%) termasuk discarded species. Sementara di Kuala Penet, 14 spesies (8,76%) retained dan 7 spesies (1,28%) discarded species. Hasil penelitian ini membantu untuk mengklarifikasi keragaman ikan non-target yang ditemukan dari perikanan jaring insang dasar di Pesisir Lampung Timur.Kata kunci : discarded, rajungan, retainedAbstract—The study was conducted with the aim to identifying non-target fish diversity and composition from blue swimming crab set gill-net fishery. Samples were collected from June to October 2017 at Labuan Maringgai and Kuala Penet, East Lampung Coastal. The results showed that 21 non-target fish obtained from Labuan Maringgai and Kuala Penet areas were similar in terms of species diversity.. In Labuan Maringgai area 15 species (11.40%) of non-target fish were retained either as own consumption or marketing and 6 species (0.89%) were discarded. While In Kuala Penet area, 14 species (8.76%) were retained and 7 species (1.28%) were discarded. The result of this study helps to clarify diversity of non-target fish found from set gill-net fisheries in East Lampung Coastal.Keywords : blue swimming crab, discarded, retained

scholarly journals Fish community structure along altitudinal gradients with relation to environmental variables in Ratuwa River of Eastern, Nepal

Our Nature ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 70-81
Author(s):  
Dipak Rajbanshi ◽  
Jash Hang Limbu ◽  
Niraj Khadka ◽  
Prakash Kumar ◽  
Jeevan Kumar Gurung ◽  
...  
Keyword(s):  
Community Structure ◽  
Altitudinal Gradient ◽  
Fish Community ◽  
Fish Diversity ◽  
Fish Assemblage Structure ◽  
Fish Community Structure ◽  
Brachydanio Rerio ◽  
Altitudinal Gradients ◽  
Space And Time ◽  
Significant Difference

Studies on fish community structure along altitudinal gradients of rivers are lacking in Nepal. This study was carried out to gauge the fish diversity and composition along elevational gradient in Ratuwa River. The altitudinal gradient varies between 70 m to 1300 m. Fish samples were collected based on habitat representativeness from April (spring) 10-18, July (summer) 10-18, October (autumn) 10-18, 2020 and January (winter) 10-18, 2021. A total of 3447 specimens representing 4 orders, 14 families and 36 species were identified. Both fish diversity and abundance of studied ichthyofauna vary with altitudinal gradient. The present study affirmed that fish species of Opsarius bendelisis, Schistura multifasciatus, Garra annandalei, Brachydanio rerio, Aspidoparia morar, and Schistura scaturigina are the major contributory species (>1%) for both space and time spectrums. Fish community structure testing for both to space and time showed significant difference in spatial spectrum (R=0.72, P<0.01) but no significant difference in temporal variation (R=-0.034, P>0.05). The present results hinted that fish assemblage structure varied significantly from low to high elevations, altitude, water temperature, water velocity, dissolved oxygen and pH was found as major influential factors (P<0.05) for species distribution.

scholarly journals The fish diversity of mangrove waters in Lombok Island, West Nusa Tenggara, Indonesia

2018 ◽  
Vol 19 (1) ◽  
pp. 71-76 ◽  
Author(s):  
GEMA WAHYUDEWANTORO
Keyword(s):  
Fish Species ◽  
Diversity Index ◽  
Fish Diversity ◽  
Oryzias Javanicus ◽  
Gill Net ◽  
The Pacific ◽  
Evenness Index ◽  
Richness Index ◽  
Lombok Island

Wahyudewantoro G. 2018. The fish diversity of mangrove waters in Lombok Island, West Nusa Tenggara, Indonesia. Biodiversitas 19: 71-76. Lombok Island’s waters are the main gateway of the mass water flow from the Pacific and Indian Oceans. Therefore, it is suspected the fish species that inhabit them is very diverse. The aim of the research was to reveal the diversity of mangrove fish species, with a case study in West Lombok and Central Lombok. Fishes were caught using cast net with mesh sizes of 1.5 cm and 2.5 cm, gill net with mesh sizes of ¾ inch, 1.5 inch and 2 inches. This research found 38 species belonging to 28 genera and 20 families. Oryzias javanicus and Periopthalmus argentilineatus were distributed at all research stations.Species diversity index (H) of fish was in the range of 2.618 to 3.072, evenness index (E) 0.803 to 0.950 and species richness index (d) from 4.328 to 6.206. Based on the similarity of fish species that exist in each station, the species of fish in station IV were different from those of other stations.

scholarly journals Patterns of ichthyofaunal diversity and distribution across Jebba Hydro-Electric Power (HEP) dam, Jebba, north-central Nigeria

2020 ◽  
Author(s):  
S. O. Oladipo ◽  
L. M. Nneji ◽  
O. A. Iyiola ◽  
I. C. Nneji ◽  
A. O. Ayoola ◽  
...  
Keyword(s):  
Sampling Period ◽  
Freshwater Fishes ◽  
Fish Diversity ◽  
Hydroelectric Power ◽  
North Central ◽  
Gill Net ◽  
Unidentified Species ◽  
High Species Richness ◽  
Downstream Section ◽  
Taxonomic Approach

Abstract The ichthyofauna diversity of the Jebba Hydroelectric Power (HEP) Dam, Jebba, North-central Nigeria was studied. Fishes were sampled for 24 months using gill net, hook and line, and cast net. Individuals were identified using morphological and molecular (mitochondrial Cytochrome c Oxidase subunit I) data. A total of 9605 freshwater fishes were recorded during the sampling period. The use of an integrative taxonomic approach enabled the identification of 83 species belonging to 42 genera. Additionally, the study recorded three unidentified species – Ctenopoma sp, Malapterurus sp., and Protopterus sp. Analyses showed that individuals belonging to families Cichlidae and Mochokidae dominated the dam. The diversity analyses revealed relatively high fish diversity during the rainy season at the downstream section of Jebba HEP dam compared to the upstream section. The study, therefore, showed the presence of a diverse fish community comprising high species richness and diversity across the Jebba HEP dam. Finally, we recommend proper biodiversity monitoring and assessment of freshwater fish diversity across Nigeria. In addition, the use of an integrated taxonomic approach is recommended for appropriate species’ identification and studies of freshwater fishes from Nigeria.

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