National Aquatic Resources Research & Development Agency (NARA)

Some Aspect of the Biology and Population Dynamics of Amblygaster Sirm (walbaum) from the West Coast of Sri Lanka

By: Series: Journal of National Science CouncilPublication details: Sri Lanka, Journal of National Science Council, 1989,Description: 53-66p
Contents:
The spawning of Amblygaster sirm was found to occur twice a year in April / May and August / September. The growth rate and the asymptotic length were fotind to be 2.1 (annually) and 24.4 cm respectively. Growth pattern determined from length frequency distribution, corresponded with the spawning season. Natural morta­ lity coefficient was estimated as 2.54. The sex ratio indicated that more females than males were abundant in the catches. At present about 75 — 85% of the maximum yield is being obtained. The yield per recruit can be increased by increasing the'fishing intensity. However, an increase in fishing intensity could lead to a reduction in the spawning stock below the level where the recruitment could be affected.
Tags from this library: No tags from this library for this title. Log in to add tags.
Star ratings
    Average rating: 0.0 (0 votes)
Holdings
Item type Current library Copy number Status Barcode
Research Papers Research Papers NARA Main Library Ready Reference RP0393 Available RP0393

The spawning of Amblygaster sirm was found to occur twice a year in April / May and August / September. The growth rate and the asymptotic length were fotind to be 2.1 (annually) and 24.4 cm respectively. Growth pattern determined from length frequency distribution, corresponded with the spawning season. Natural morta­ lity coefficient was estimated as 2.54. The sex ratio indicated that more females than males were abundant in the catches. At present about 75 — 85% of the maximum yield is being obtained. The yield per recruit can be increased by increasing the'fishing intensity. However, an increase in fishing intensity could lead to a reduction in the spawning stock below the level where the recruitment could be affected.

There are no comments on this title.

to post a comment.
NARA Library Management System Maintaining by Ceymarc Technologies