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Biodiversity Study of Sis (small Indigenous Species) of Fish in Northwest Part of Bangladesh and Detection of Threatened Species

Rohul AMIN
Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.

Shakur AHAMMAD
Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.

Hafiz All AMIN
Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.

Ferdous MEHBUB
Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.

Main UDDIN-MIAH
Bhangabondhu Agricultural University, Gazipur, Bangladesh.

Abstract/ Executive Summary:

This study provides the current status of small indigenous fish species especially the threatened species. Regular data were collected from some important urban and peri-urban fish markets and from natural waters of the Northwest part of Bangladesh. The availability of SIS of fish declined to a great extent over the years and many of them are rare or endangered. Due to high population growth there is an ever-increasing gap between supply and demand of SIS of fish. Some rivers of the Northwest part of Bangladesh are well connected with Indian rivers and that causes the SIS of fish diversity in the natural waters comparatively rich. The most significant message of this study is that, some vulnerable and endangered SIS of fish are locally abundant in the natural waters of the Northwest part of Bangladesh. So they should be conserved for their common availability and sustenance throughout the country that would be a most important step in favor of global ichthyo-biodiversity conservation.

Keywords: Ichthyo-biodiversity, Small indigenous species, Endangered fish

Location: Dinajpur district

Start Date: 00-01-2008

End Date: 00-12-2008

Program Area: Conservation and Biodiversity

Commodity: Aquatic animal

Objectives:

To know the biodiversity of SIS of fish in Dinajpur district
To identify status of threatened SIS of fish in Dinajpur district

Methodology:

Bangladesh lies between the longitude of 88E and 92.30 E and the latitudes of 20 N and 26.30 N. The country is an extensive plain land except its eastern and southeastern margin where low ranges of Lusai and the Garo Hills are found. This flat plain is built by the enormous load of alluvium laid down by the great rivers and their tributaries. This country is called country of hundred rivers and it has 290 rivers from which 94 are international along with numerous ponds, beels, haors, lakes, flood plains, brackish water and marine waterbodies. However, Northwest part of Bangladesh is mainly important for the availability of various freshwater ecosystems. The research work has been performed from January – December/2008. Two types of fish markets were used for this study- urban and peri-urban fish markets. On the other hand, required data about SIS of fish were collected from important rivers and beels of the Northwest part of Bangladesh. Experimental fish markets: a) Urban fish markets: Among the studied urban fish markets, Bahadurbazar if a larger fish market of the Northwest part of Bangladesh and is situated in the main town of Dinajpur district. Fish from various natural waters and ponds of different sites of Dinajpur district have been supplied here for selling. Fishes have also been distributed to various local small fish markets of this district from here. The main consumer group of this fish market is businessman and service holders. Besides, Railway bazar, Fulbari bazar and Parbotipur bazar are also the largest fish markets of the Northwest part of Bangladesh which are located in various upazilas of Dinajpur district. b) Peri-urban fish markets: The data collecting peri-urban fish markets of this study were- Basherhat fish market, Jamtoli bazaar, Doshmail bazar, Bushirbandar bazar and Chirirbandar bazaar which are located near to important natural waters of the Northwest part of Bangladesh. The main consumer groups of these peri-urban fish marketss are the villagers, businessmen and service holders of the respective localities. Experimental natural waterbodies: Required data about small indigenous species of fish (SIS) were collected from important natural waterbodies of the Northwest part of Bangladesh. Data collection: Field works were undertaken in each of the 6 Upazillas over which important rivers and beels spread in Northwest part of Bangladesh: Dinajpur sadar, Parbatipur, Fulpur, Chirir bondar, Birol and Nawabgonj. Data were collected from: interviews and focus group discussions with fishermen, retailers, middlemen and consumers of fish; secondary literature, semi structured and structured questionnaires were developed, pretested and adapted prior to the survey proper. Weekly sampling was performed through the whole year from the major natural water bodies and fish markets of the Northwest part of Bangladesh both in morning (7 am to 9 am) and evening (4 pm to 6 pm). Data analysis: The analysis of the data mainly involved tabular and descriptive technique. The data were summarized and a number of tables and graphs were prepared in accordance to the objectives of the study. The technique of analysis included the classification of tables and graphs into meaningful result by arithmetic mean and Percentage. Species identification: The collected fish were identified by using references.

Source of Information: Biological Diversity and Conservation 3/1 (2010) 56-65 ISSN 1308-5301 Print; ISSN 1308-8084 Online

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The availability of SIS of fish is in decline, partly due to fishing pressure from the ever increasing population and partly due to loss of natural habitats. Apart from this, the presently practiced carp and large fish always encourage fish farmer to eliminate indiscriminately all the SIS from their water bodies before large fish stocking. It causes the supply of SIS of fish is highly fluctuating and far less than the market demand. So, the price is increasing alarmingly. Therefore, once mostly abundant and easily available SIS of fish is quickly getting out of the reach of poor people and ultimately become gradually rare available. So, it is significant and urgent to take all the necessary steps to protect and conserve all the most and least available SIS of fish through out the world including Bangladesh.

Knowledge Management: Journal, Online Circulation