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Hilsa Fishery Management Research. I) Reproductive Biology of Hilsa and Abundance of Jatka in the Major Nursery Grounds

Dr. Khan Kamal Uddin Ahmed
Principal Scientific Officer (cc)
Riverine Station, Bangladesh Fisheries Research Institute, Chandpur

Md. Anisur Rahman
Scientific Officer
Riverine Station, Bangladesh Fisheries Research Institute, Chandpur

Mrs. Tayfa Ahmed
Scientific Officer
Riverine Station, Bangladesh Fisheries Research Institute, Chandpur

Mohammad Asraful Alam
Scientific Officer
Riverine Station, Bangladesh Fisheries Research Institute, Chandpur

Abstract/ Executive Summary:

Comparative percentage of spent hilsa (33.69%) observed in the spawning areas which were found 67% higher than based on the year 2003 (0.5%) indicating successful breeding of hilsa in the spawning grounds. About seven times higher amount of jatka were produced in the year present year than the base year 2007-2008 due to ten days fishing ban in the spawning grounds of hilsa during peak spawning period indicating successful breeding and positive impacts of fishing ban. Abundance of jatka was found higher than previous years and it was 160% times higher than based on the year 2005. Water quality of the jatka assessed areas was found congenial.

Keywords: Hilsa, Breeding, Jhatka, Water quality

Location: Chandpur

Start Date: 01-07-2006

End Date: 30-06-2009

Program Area: Resource Development and Management

Commodity: Hilsa

Objectives:

A) To study the maturity and recent spawning status of hilsa; to assess the abundance and distribution of jatka in the major nursery grounds, covering Sureshwar-Maoa region in the Padma river confluence; to study the impact of jatka fishing ban on the abundance and distribution of jatka and hilsa; and to assess the spawning success of hilsa due to imposing fishing ban in the major spawning grounds. B) To assess the socio-economic changes in the fishers related to harvest hilsa (up to 30 cm); to assess the impact of proposed size hilsa protection on the abundance and production of hilsa; and to determine the catch per unit effort (CPUE) and landing status of grown up hilsa.

Methodology:

Major spawning and nursery grounds of hilsa were visited for comprehensive study. Hilsa landing data was recorded from major and small fish landing sites along the major rivers of southern belt and estuarine areas as well during peak and lean spawning season of hilsa. Fishers’ catch was observed directly and percent of oozing and spent hilsa was recorded during full moon period of August to November. Commercial hilsa landing centers, small landing sites along the major river bank will also be observed directly and per cent of male-female, gravid, ovulating (oozing) and spent hilsa were recorded during peak spawning season. Length-weight and length-frequency data from Chandpur, Cox’sbazar, Ramgoti, Barisal, Mohipur, Khulna, Aricha, Bhairob, Bagerhat, Godagari, areas was collected to study population dynamics of hilsa and to estimate the MSY and biomass.

Source of Information: Annual Research Program 2008-09 . BFRI, Mymensingh.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Seven lakh fifty thousand

Total Budget (Tk.) : Seven lakh fifty thousand

Achievement/Findings:

Continuous information on changes in hilsa spawning and nursing grounds with special reference to ecological and hydrological aspects generated. Maximum sustainable yield (MSY) and biomass were estimated. Jatka (juveniles of hilsa) could be well conserved and livelihood of hilsa/jatka fisherfolk will be uplifted.

Knowledge Management: Report/Proceedings