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Status and Diversity of Ichthyofauna of Jamuna River, Bangladesh

Mst. Nahida Easmin
Department of Zoology, Jagannath University, Dhaka-1100, Bangladesh

AHM Shafiullah Habib*
Department of Zoology, Jagannath University, Dhaka-1100, Bangladesh

Shimu Akter and
Department of Zoology, Jagannath University, Dhaka-1100, Bangladesh

Keya Majumder
Department of Zoology, Jagannath University, Dhaka-1100, Bangladesh

Abstract/ Executive Summary:

An investigation was made in Jamuna River of Pabna district from May 2016 to April 2017 to assess the diversity of ichthyofauna. A total of 77 species were recorded under 10 orders 25 families and 54 genera. Cypriniformes was recorded as dominant order comprising 36% of the total, followed by Siluriformes (27%), Perciformes (17%) and Clupeiformes (7%). The lowest species composition was less than 1% belonging 3 orders, Anguiliformes, Synbranchiformes and Tetraodontiformes. According to IUCN (2015) status 23% of found species was threatened, comprising 1% Critically Endangered (CR), 12% Endangered (EN) and 10% Vulnerable (VU) in nature. However only 3% were found Vulnerable (VU) globally during the study period. Annual values of Shannon diversity index (H), Simpson index, Margalef’s richness index (D) and Pielou’s evenness index (E) were 3.35, 0.053, 6.931 and 0.772 respectively. Considering all findings this study emphasized the establishment of proper management strategy for the improvement of biodiversity and retaining good environment of the river.

Keywords: Jamuna River, Fish fauna, Diversity status, Diversity indices.

Location: Jamuna River of Pabna district

Start Date: 00-05-2016

End Date: 00-04-2017

Program Area: Conservation and Biodiversity

Commodity: Algae

Objectives:

In this study, Jamuna River had been selected for addressing its contribution in fisheries resources in Bangladesh. This work was done to quantify the status and diversity of fishes of the Jamuna River of Bangladesh.

Methodology:

Two sites of Jamuna River at Bera Upazila under Pabna District have been selected for collecting fish specimens. The two points were the Kazirhat Launch Ghat (23.88288° N and 89.6708° E) and the Nagarbari Ghat (23.947208° N, 89.652662° E).

The present study was conducted for one year from May 2016 and continued to April 2017. Data were collected once in each month usually in the last week from 6 am to 10 am. Some of the fishes were identified during the field visit. The unidentified fishes were collected and preserved in 4-6 % buffered formalin solution for further laboratory study at the Fisheries Laboratory Department of Zoology at the Jagannath University.

For determination of species composition, the following formula was used for counting small fish which were very easy to count.

These specimens were identified according to their morphometric and meristic characteristics following Bhuiyan (1964), Rahman (2005) and Talwar and Jhingran (1991). After identification, fish were systematically arranged according to Nelson (2006). The threatened status of the fishes was evaluated in accordance with the Red List of IUCN Bangladesh (2015). Three criteria were considered as threatened viz. Critically Endangered (CR), Endangered (EN) and Vulnerable (VU).

Source of Information: Jagannath University Journal of Life and Earth Sciences, 4(1): 12 – 24, 2018 ISSN 2414-1402

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It is apparent from the present study that the status of the fish fauna diversity of the Jamuna River is more or less satisfactory but extensive survey with the condition of river, navigation and ecological healthiness assessment is needed for the conservation of the fish.

Knowledge Management: Journal