Size composition of the catches of the pink shrimp Penaeus duorarum notialis in the shrimp fishery of Sierra Leone

Scott, R.B.S. (1978) Size composition of the catches of the pink shrimp Penaeus duorarum notialis in the shrimp fishery of Sierra Leone. Bulletin of the Institute of Marine Biology & Oceanography, Fourah Bay College, University of Sierra Leone, 3(1), pp. 65-66.

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Abstract

Measurements were taken of size distribution of P. d. notialis collected off Sierra Leone over a period of six months from October 1977 to March 1978. From the frequency distribution curves it is observed that the curves for male shrimps show only one or two major modes, which show prominence between 12.5 and 14.1 cm of total length. Females mostly exhibited size groups with three or four different length ranges and occasional occurrence of 1 to 5 modes. These size groups were observed to show continuous changes. No one group could be said to be permanent. The point of entry into the fishery of male shrimps was found to be at an average total length of 10.5 cm, while females did so at 11 cm. Sex ratios in the different samples were usually 1:1 but in one case the males were more numerous by 2:1 and in four other samples females were significantly preponderent. These departures from the 1:1 ratio may have been artificially created by sorting of the catches on board the ships.

Item Type: Article
Title: Size composition of the catches of the pink shrimp Penaeus duorarum notialis in the shrimp fishery of Sierra Leone
Personal Creator/Author:
CreatorsEmail
Scott, R.B.S.
Corporate Creator/Author: Institute of Marine Biology & Oceanography, Fourah Bay College, University of Sierra Leone
Journal or Publication Title: Bulletin of the Institute of Marine Biology & Oceanography, Fourah Bay College, University of Sierra Leone
Volume: 3
Number: 1
Page Range: pp. 65-66
Date: 1978
Issuing Agency: University of Sierra Leone Fourah Bay College Institute of Marine Biology & Oceanography
Additional Information: Also available in "Bulletin of the Institute of Marine Biology and Oceanography", Special edition (1993) - ICLARM contribution no. 1002
Uncontrolled Keywords: Sierra Leone; pink shrimp; Penaeus duorarum notialis; shrimp fisheries
Subjects: Fisheries
Management
Item ID: 6340
Depositing User: Ms Maria Kalentsits
Date Deposited: 22 Jul 2011 12:39
Last Modified: 22 Jul 2011 12:39
URI: http://aquaticcommons.org/id/eprint/6340

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