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Fin Fish Assemblage and Biodiversity Status of Carps on Halda River, Bangladesh

Ferdous Mst Jannatul
Department of Fish Biology and Genetics, Sylhet Agricultural University, Sylhet-3100

Karim Md Rashidul
Department of Fish Biology and Genetics, Sylhet Agricultural University, Sylhet-3100

Hossain Mohammad Amzad
Department of Fish Biology and Genetics, Sylhet Agricultural University, Sylhet-3100

Rahman Md Arifur
Department of Fish Biology and Genetics, Sylhet Agricultural University, Sylhet-3100

Iqbal Mohammed Mahbub.
Department of Fish Biology and Genetics, Sylhet Agricultural University, Sylhet-3100

Abstract/ Executive Summary:

The Halda River is the only natural spawning ground of Indian major carp species. A twelve months long study was conducted from July 2013 to June 2014 in Halda River at Garduara point in Chittagong districts of Bangladesh. Sampling was done during full and new moon for two successive days in each month. A total of 53 fish species belonging to 18 families were identified. However, the concerning fact was carp species r at Garduara point and 15 species were identified. Among them 5 were Not Threatened (NT), 2 Vulnerable (VU), 5 Endangered (EN) and 3 Exotic (EX). The Shannon-Weaver diversity index (H') ranged from 1.72 (in July) to 2.13 (in January), tiniest Margalef richness index was witnessed in November/December (1.05), while utmost value observed in July (1.22), peak mean evenness value (0.79) was encountered in January and bottommost (0.63) in July and the uppermost mean dominance value (0.85) was observed in January and lowest (0.7) in July. The Shannon-Weaver and Pielou’s index was found to be significant among the seasons at 0.05% significance level, while the Margalef and Simpson index was not significant among the seasons. The carp species at Garduara point found to be not evenly distributed. Among the Indian major carps encountered in the study area, Catla catla found to be comprised 4.78% of the total biomass followed by Cirrhinus cirrhosus 5.74%, Labeo rohita 4.95% and Labeo calbasu 0.66%.

Keywords: Halda River, Carp species, Biodiversity, Garduara point.

Location: Chittagong district

Start Date: 00-07-2013

End Date: 00-06-2014

Program Area: Conservation and Biodiversity

Commodity: Fish

Objectives:

To find out the carp diversity of the river at Garduara point, Chittagong.

Methodology:

Study area: The study was conducted in the South- Eastern region (Chittagong Division) of Bangladesh. Geographic coordinates of Chittagong district in Bangladesh is 22°00′ N to 23°00′ N latitude and 91°20′ E to 91°00′ E longitude. The research was accomplished in the Halda River, a major tributary of river Karnaphuli at Garduara point of Chittagong district of Bangladesh. The present study were conducted at Garduara point, which is belongs to the Chittagong district of Bangladesh between Latitude 22° 29' 59" N and Longitude 91° 51' 58" E. Diversity analysis tools: In the present study, diversity of fish species were evaluated by dint of Shannon-Weaver index (H′), species richness by Margalef index (d), evenness by Pielou’s index (J′), and dominance by Simpson index. Statistical analysis: A one-way analysis of variance (ANOVA) in SPSS was used to test for significant difference in diversity indices among the seasons. For ANOVA test SPSS software V15.0 (Statistical Package for Social Sciences) was used. All the diversity indices analyses were performed by the software PAST (Paleontological statistics) version 2.16.

Source of Information: Annals of Veterinary and Animal Science 2015 2(6), 152-161 ISSN: 2312-9123

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

A little monthly variation found in total diversity of the fish species assemblage in the Halda river at Garduara point. From the sampling site, 15 carp species were identified, and it covers 28.3% of the total biomass followed by bagridae 13.2%. Among the 15 carp species Mola (A. mola) contributing highest percentage 30.16% (on the basis of total individuals encountered in the study area) followed by Dhela (O. cotio) contributing 22.54% of the total carp individuals encountered in the study area. Fish catching percentage also indicates the maximum relative abundance of species in the river. As 53 species are identified from a single point, so the proper steps should be taken for the protection and conservation of these valuable fisheries resources. Restriction on fishing prior to breeding season, controlled discharge of domestic wastes, banning the use of illegal fishing gears in fishing, and the establishment of fish sanctuary, etc. could be done for the protection of fisheries biodiversity.

Knowledge Management: Journal