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Title: | Fishery, growth, yield per recruit and stock assessment of Sphyraena obtusata Cuvier off Tuticorin, Gulf of Mannar |
Other Titles: | Not Available |
Authors: | Balasubramanian,T S Mohamad Kasim,H |
ICAR Data Use Licennce: | Not Available |
Author's Affiliated institute: | Not Available |
Published/ Complete Date: | 1990 |
Project Code: | Not Available |
Keywords: | Fishery stock assessment Sphyraena obtusata Tuticorin Gulf of Mannar |
Publisher: | CMFRI/ICAR |
Citation: | Not Available |
Series/Report no.: | Not Available |
Abstract/Description: | Annual average catch of 612.2 t of barracudas were landed at the catch rate of 17.1 kg/unit which constituted 3.9% in the total catch landed by trawlers during 1987 - '89 at Tuticorin. Higher effort input during certain months did not coincide with better abundance of barracudas. Sphyraena obtusata Cuvier constituted on an average 69.6% of the total catch of barracudas. Based on the length-frequency data, the growth ^ameters have been estimated to be L <»> 470.0 mm, K 1.0364/year and t^ -0.0098 ye. The natural mortality coefficient (M) is 1.591, the average annual total mortality coefficient (Z) is 2.8317 and the average exploitation rate (U) is 0.4123. The average standing stock is estimated to be 343.2 t and average annual stock 1,032.71. Yield per recruit studies indicate that S. obtusata is not exposed to higher fishing pressure as the average fishing mortality coefficient (F), 1.2407, for the prevailing age at first capture, 0.4709 ye is lower than the respective F,^which can yield the Y,^ in both the M/K ratios 1.0 and 1.535. There is scope for increasing the effort of trawl net with a view to increase the catch of this species at the prevailing conditions. |
Description: | Not Available |
Type(s) of content: | Article |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | Indian Journal of Fisheries |
Volume No.: | 37 |
Page Number: | 281-288 |
Name of the Division/Regional Station: | Not Available |
Source, DOI or any other URL: | http://eprints.cmfri.org.in/299/2/Article_04.pdf |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/57825 |
Appears in Collections: | FS-CMFRI-Publication |
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