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Title: | Fishery, population dynamics and stock assessment of the spotted seer in gill net fishery at Veraval |
Other Titles: | Not Available |
Authors: | Ghosh,Shubhadeep Pillai,N G K Dhokia,H K |
ICAR Data Use Licennce: | Not Available |
Author's Affiliated institute: | Not Available |
Published/ Complete Date: | 2009 |
Project Code: | Not Available |
Keywords: | Fishery Gill netters Population dynamics Scomberomorus guttatus Stock assessment Veraval |
Citation: | Not Available |
Series/Report no.: | Not Available |
Abstract/Description: | The fishery and population characteristics of Scomberomorus guttatus (Bloch & Schneider) from Veraval was studied for the period 2003 – 2006. The average annual catch was 378 t, forming 14.4% of the total gill net catches at Veraval. The postmonsoon and winter seasons (September to January) were the most productive seasons in terms of catch and catch rate. The length–weight relationship showed that growth was isometric for the species. The von Bertalanffy growth equation was: Lt = 61.27 [1 – e - 1.4 (t + 0.0046)] and length attained at the end of 1 and 2 years were 46.3 cm and 57.6 cm respectively. The growth performance index was 3.721 and longevity was 2.138 years. Recruitment pattern was unimodal with peak recruitment from February - July and the length at first capture was 21.1 cm. The natural mortality, fishing mortality and total mortality were 1.79, 2.92 and 4.71, respectively and exploitation ratio was 0.62. The maximum sustainable yield was 305 t, which was lower than the average annual catch indicating over-exploitation of the species. The yield per recruit and biomass per recruit was 198.9 g and 66.9 g respectively. An increase in relative yield to 101.8% would be obtained by decreasing the present level of fishing by 20%. |
Description: | Not Available |
ISSN: | Not Available |
Type(s) of content: | Article |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | Indian Journal of Fisheries |
Volume No.: | 56 |
Page Number: | 157-161 |
Name of the Division/Regional Station: | Not Available |
Source, DOI or any other URL: | http://eprints.cmfri.org.in/6806/1/fishery,_population.pdf |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/62431 |
Appears in Collections: | FS-CMFRI-Publication |
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