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Status of Vulnerable Leopard Whip Ray (himantura Undulata) at Two Landing Centres of Chittagong and Cox's Bazar, Bangladesh

Bikram Jit Roy
Marine Fisheries Survey Management Unit, Agrabad, Chittagong, Bangladesh.

Nripendra Kumar Singha
Marine Fisheries Survey Management Unit, Agrabad, Chittagong, Bangladesh.

S. M. Hasan Ali
Marine Fisheries Survey Management Unit, Agrabad, Chittagong, Bangladesh.

Md. Gaziur Rahman
Marine Fisheries Survey Management Unit, Agrabad, Chittagong, Bangladesh.

Md. Fokhrul Alam
Marine Fisheries Survey Management Unit, Agrabad, Chittagong, Bangladesh.

Abstract/ Executive Summary:

Landing of vulnerable ray species, Leopard whip ray, Himantura undulata (Bleeker, 1852) was recorded from two fish landing centers of Bangladesh Fisheris Development Corporation. The highest landing volume was recorded 0.420 mt in March 2010 and the lowest 0.112 mt in August 2011. Average highest and lowest landings were 52.5 kg and 2.88 kg in the months of November 2012 and in March 2009 respectively . During 2009-2010 H. undulata contributed only 0.560 MT (0.33 %) followed by 2010-2011, 2011-2012 and 2012-2013 period were 0.893 MT (0.28%), 0.882 MT (0.23% ) and 0.434MT (0.12%) of the year wise total landing volume of sharks and rays respectively. Month wise maximum and minimum recorded numbers of landed H. undulata were 59 and 4 in the month of November, 2012 and July, 2009 respectively. The highest and lowest percentage contributions were 2.54% and 0.28% in July, 2009 and March, 2013 respectively.

Keywords: Landing, Whip ray, Fish harbour BFDC

Location: BFDC Fish harbour, Cox's Bazar and Fishery ghat fish landing center, Chittagong

Start Date: 00-07-2009

End Date: 00-06-2013

Program Area: Socio-economic and Policy

Commodity: Fish

Objectives:

To know the present status of this species in Bangladesh.

Methodology:

The study was conducted from July, 2009 to June, 2013 in two shark and ray fish landing centers at BFDC Fish harbour, Cox’s Bazar and Fishery ghat fish landing center, Chittagong. These sampling centers were selected in order to cover a wide range of the most landing centers, retail and whole sale markets, target and incidental catches of the species, from the Bay of Bengal of Bangladesh region. Month wise total landing data, total numbers were recorded both at landing stations and interview of boat owners of commercial fishing vessels. The data were collected in new-moon, full-moon, first quarter, last quarter and other days of the moon month from the landing centers. Sampling days were 8 in each month of the year.

Source of Information: Bangladesh J. Zool. 42(1): 11-17, 2014

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It has been observed that, during 2009-2010 total landed numbers and average weight of H. undulata were 12 numbers & 46.66 kg in each followed by 27 and 33.07 kg, 45 and 19.60 kg and 74 and 5.86 kg in the year 2010-11, 2011-12 and 2012-13, respectively. Thus the total number of H. undulata was gradually increased but average landing we was gradually decreased. So it is clear that, in before exploitation of Leopard whip ray were large in size and weight, but now days is captured as small in size and weight. For the fishing pressure, it is now in vulnerable position.

Knowledge Management: Journal