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Fish Diversity at the Vicinity of Hatiya Island, Bangladesh

Sourav Mahmood
Department of Fisheries, University of Dhaka, Dhaka 1000, Bangladesh

Bijoya Paul
Department of Fisheries, University of Dhaka, Dhaka 1000, Bangladesh

Mohammad Raknuzzaman
Department of Fisheries, University of Dhaka, Dhaka 1000, Bangladesh

Md Habibullah Al Mamun
Department of Fisheries, University of Dhaka, Dhaka 1000, Bangladesh

Abstract/ Executive Summary:

This study was aimed to identify the present status and threats on the fish diversity of Hatiya Island, Noakhali, Bangladesh. Five sampling stations were at Chairman ghat, Katakhali ghat, Tamruddin ghat, Burirdona ghat, Domar Bazar. Data were collected using questionnaire interviews (QI), focus group discussions (FGD), and key informant interviews (KII). A total of 38 fish species were recorded belonging to 9 orders and 21 families. Siluriformes was the most abundant order (38%), whereas Cyprinidae was the richest family (18.42%). Based on IUCN red list of threatened species 2015, 26% species was categorized as Locally Threatened in Bangladesh, following 13% as Vulnerable, 13% as Endangered, 63% as Least concerned, 3% as Data Deficient (DD) and 8% was Not Threatened (NT). Overexploitation, water pollution, habitat degradation and climate change were identified as the major threats for declining of fish diversity in the study area. This study recommends sustainable fisheries management, restocking economically important fish species, establishment of sanctuary, maintenance of fishing gears, control of pollution, and the implementation of the fish act for conservation of fish biodiversity of the Hatiya Island, Noakhali.

Keywords: Fish; diversity; status, Threats; Hatiya Island

Location: Hatiya Island, Noakhali, Bangladesh

Start Date: 00-00-2018

End Date: 00-00-2018

Program Area: Conservation and Biodiversity

Commodity: Aquatic animal

Objectives:

The specific objectives of the present study were to (i) assess the fish diversity including threatened fishes in Hatiya Island (ii) identify threats to fish diversity and suggest recommendations to improve present conservation status of threatened fishes (iii) to disseminate baseline information for the status of fish diversity the Hatiya island.

Methodology:

Study area: Fish biodiversity data were collected from five stations of Hatiya Island such as Chandnandi (Chairman ghat), Jahajmara (Katakhali ghat), Tamruddin (Tamruddin ghat), Burirchar (Burirdona ghat), and Nijhum dwip (Domar Bazar) in April 2018. Data collection: Primary information about fish species was collected through questionnaire interviews (QI) by a face to face interview method. The questionnaire was formulated as a set of both closed and open-ended questions including general information such as local name, distribution and availability of the fish species, fishing gears and crafts being used, major factors threatening the fisheries diversity, etc. The respondents for the questionnaire interview were fishermen, fishing boat owners, fish traders, retailers and other local people from the study areas. To justify the primary information, a crosscheck was done by the key informant interviews (KII) such as Upazila Fisheries Officer (UFO), District Fisheries Officers (DFO), experienced fishermen and relevant NGO workers. Focus group discussion (FGD) was also done in fish landing centers, fish markets, and fisher’s village of those selected surveyed areas. Secondary data to support the primary information was collected from various commune's annual reports and documents. Different field guides were used for the identification of species in the field. Photographs were taken for future identification and documentation. Determination of conservation status: The conservation status of the recorded fish specimen was determined following the database of the Red List of Bangladesh (IUCN Bangladesh, 2015). Analysis of data: The collected data were firstly scrutinized carefully and then summarized into tabulation. To ensure the accuracy of the data entry, the result sheets were compared carefully with preliminary data sheets and the original questionnaire. The data were finally processed and analyzed with Microsoft Excel Professional version 2013.

Source of Information: Bangladesh J. Zool. 48(1): 45-55, 2020

Article Link (Online Journal): DOI: https://doi.org/10.3329/bjz.v48i1.47875

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present study is reporting the current fish diversity of the Hatiya Island, identifying major threats to fish diversity and providing recommendations for fish biodiversity conservation. A total of 38 fish species and 10 threatened fish species out of 38 recorded from the Hatiya Island indicates an alarming threat to the present conservation status of fishes in Bangladesh. Some recommendations would be mentioned from the study for policy making, implementation, and conservation of fish diversity in the Hatiya Island: banning indiscriminate killing of fish fry and fingerling; controlling over destructive fishing gears and crafts; establishing and managing fish sanctuaries on fish breeding and nursery ground in that area; controlling over pollution around the Island; research should be carried out on the conservation of threatened fishes; introducing awareness raising program on conservation among fisherman, fish retailers, fish traders and local people.

Knowledge Management: Journal