Wadge Bank trawl fishery studies. Pt. 5. Rational exploitation of the resident demersal stock
The general history of the trawl fishery of the Wadge Bank off Cape Comorin, South India (Fig. 1), the nature and composition of its demersal fish population, and the present state of its fishery has been given by various authors (Malpas 1926, Pearson and Malpas 1926, Sivalingam and Medcof 1957, Medcof 1963, Mendis 1965a, 1965b, Sivalingam 1966a, 1966b, 1969a and 1969b). It has been shown earlier (Sivalingam and Medcof 1957, Sivalingam 1969a) that the Wadge Bank stock is made up of two groups. The resident stock which is present on the fishing grounds throughout the year and the migrant stock that appears on the fishing grounds only during the southwest monsoon months. The object of this paper is to discuss the effect of fishing on the resident stock between 1945 and 1962 and based on the information available; assess the maximum sustained yield of the resident stock. The "Bigfish" of the resident stock is the mainstay of the Wadge Bank trawl fishery (Sivalingam 1969a) and it will be shown that this stock has been overexploited from 1953 to 1957. The first sign of recovery was evident in 1960 and continued till 1962. The data since 1962 are not available to the author for analysis. It has been reported by Mendis (1965b) that considerable expansion of the trawler fleet was anticipated in 1966, and if so, the history of the fishery from 1953 to 1957 may be repeated. The assessment presented in this paper should form a rational basis for management programs.
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1969
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Subjects: | Fisheries, fishery resources exploitation, trawling effects, man-induced effects, commercial fishery, abundance, Wadge Bank, Sri Lanka, |
Online Access: | http://hdl.handle.net/1834/32559 |
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dig-aquadocs-1834-325592021-07-08T03:04:36Z Wadge Bank trawl fishery studies. Pt. 5. Rational exploitation of the resident demersal stock Sivalingam, S. Fisheries fishery resources exploitation trawling effects man-induced effects commercial fishery abundance Wadge Bank Sri Lanka The general history of the trawl fishery of the Wadge Bank off Cape Comorin, South India (Fig. 1), the nature and composition of its demersal fish population, and the present state of its fishery has been given by various authors (Malpas 1926, Pearson and Malpas 1926, Sivalingam and Medcof 1957, Medcof 1963, Mendis 1965a, 1965b, Sivalingam 1966a, 1966b, 1969a and 1969b). It has been shown earlier (Sivalingam and Medcof 1957, Sivalingam 1969a) that the Wadge Bank stock is made up of two groups. The resident stock which is present on the fishing grounds throughout the year and the migrant stock that appears on the fishing grounds only during the southwest monsoon months. The object of this paper is to discuss the effect of fishing on the resident stock between 1945 and 1962 and based on the information available; assess the maximum sustained yield of the resident stock. The "Bigfish" of the resident stock is the mainstay of the Wadge Bank trawl fishery (Sivalingam 1969a) and it will be shown that this stock has been overexploited from 1953 to 1957. The first sign of recovery was evident in 1960 and continued till 1962. The data since 1962 are not available to the author for analysis. It has been reported by Mendis (1965b) that considerable expansion of the trawler fleet was anticipated in 1966, and if so, the history of the fishery from 1953 to 1957 may be repeated. The assessment presented in this paper should form a rational basis for management programs. Pt. 1. The effect of the 1928 to 1935 commercial trawling on the demersal stock. Bulletin of the Fisheries Research Station, Ceylon, 19(1-2), pp. 13-18. - Pt. 2. The effect of trawling on the catch per hour from 1945 to 1960. Bulletin of the Fisheries Research Station, Ceylon, 19(1-2), pp. 19-26. - Pt. 3. Nature and composition of the resident population. Bulletin of the Fisheries Research Station, Ceylon, 20(1), pp. 27-38. - Pt. 4. An analysis of the length frequency measurements of the sea bream (Lethrinus nebulosus) made in 1949 and 1953 to 1958. Bulletin of the Fisheries Research Station, Ceylon, 20(1), pp. 39-50. - Department of Fisheries, Fisheries Research Station, Ceylon now incorporated in: National Aquatic Resources Research and Development Agency, Sri Lanka 2021-06-24T17:23:11Z 2021-06-24T17:23:11Z 1969 article http://hdl.handle.net/1834/32559 en application/pdf application/pdf 51-64 http://aquaticcommons.org/id/eprint/16751 12051 2015-04-24 06:40:47 16751 National Aquatic Resources Research and Development Agency, Sri Lanka |
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Fisheries fishery resources exploitation trawling effects man-induced effects commercial fishery abundance Wadge Bank Sri Lanka Fisheries fishery resources exploitation trawling effects man-induced effects commercial fishery abundance Wadge Bank Sri Lanka |
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Fisheries fishery resources exploitation trawling effects man-induced effects commercial fishery abundance Wadge Bank Sri Lanka Fisheries fishery resources exploitation trawling effects man-induced effects commercial fishery abundance Wadge Bank Sri Lanka Sivalingam, S. Wadge Bank trawl fishery studies. Pt. 5. Rational exploitation of the resident demersal stock |
description |
The general history of the trawl fishery of the Wadge Bank off Cape Comorin, South India (Fig. 1), the nature and composition of its demersal fish population, and the present state of its fishery has been given by various authors (Malpas 1926, Pearson and Malpas 1926, Sivalingam and Medcof 1957, Medcof 1963, Mendis 1965a, 1965b, Sivalingam 1966a, 1966b, 1969a and 1969b). It has been shown earlier (Sivalingam and Medcof 1957, Sivalingam 1969a) that the Wadge Bank stock is made up of two groups. The resident stock which is present on the fishing grounds throughout the year and the migrant stock that appears on the fishing grounds only during the southwest monsoon months. The object of this paper is to discuss the effect of fishing on the resident stock between 1945 and 1962 and based on the information available; assess the maximum sustained yield of the resident stock. The "Bigfish" of the resident stock is the mainstay of the Wadge Bank trawl fishery (Sivalingam 1969a) and it will be shown that this stock has been overexploited from 1953 to 1957. The first sign of recovery was evident in 1960 and continued till 1962. The data since 1962 are not available to the author for analysis. It has been reported by Mendis (1965b) that considerable expansion of the trawler fleet was anticipated in 1966, and if so, the history of the fishery from 1953 to 1957 may be repeated. The assessment presented in this paper should form a rational basis for management programs. |
format |
article |
topic_facet |
Fisheries fishery resources exploitation trawling effects man-induced effects commercial fishery abundance Wadge Bank Sri Lanka |
author |
Sivalingam, S. |
author_facet |
Sivalingam, S. |
author_sort |
Sivalingam, S. |
title |
Wadge Bank trawl fishery studies. Pt. 5. Rational exploitation of the resident demersal stock |
title_short |
Wadge Bank trawl fishery studies. Pt. 5. Rational exploitation of the resident demersal stock |
title_full |
Wadge Bank trawl fishery studies. Pt. 5. Rational exploitation of the resident demersal stock |
title_fullStr |
Wadge Bank trawl fishery studies. Pt. 5. Rational exploitation of the resident demersal stock |
title_full_unstemmed |
Wadge Bank trawl fishery studies. Pt. 5. Rational exploitation of the resident demersal stock |
title_sort |
wadge bank trawl fishery studies. pt. 5. rational exploitation of the resident demersal stock |
publishDate |
1969 |
url |
http://hdl.handle.net/1834/32559 |
work_keys_str_mv |
AT sivalingams wadgebanktrawlfisherystudiespt5rationalexploitationoftheresidentdemersalstock |
_version_ |
1756078975363317760 |