VPA estimates of fishing mortality and exploited biomass from Sardinella aurita catch-at-length data in eastern Venezuela

Mendoza, J.J. and Fréon, P. and Guzmán, R. (1994) VPA estimates of fishing mortality and exploited biomass from Sardinella aurita catch-at-length data in eastern Venezuela. Naga, the ICLARM Quarterly, 17(4), pp. 32-36.

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Abstract

In this study, length-frequency data on Spanish sardine (Sardinella aurita) from northeastern Venezuela were analyzed for the period 1967-1989. Average growth parameters for the von Bertalanffy equation were established as L sub( infinity )= 26.6 cm (TL) and K = 1.26 year super(-1). The number of recruits to the fishing area, estimated from length-structured Virtual Population Analysis, varied from <10 super(8) in the late 1960s to >10 super(9) at the end of the 1980s. Exploited biomass estimates for the same period varied from less than 20,000 t in the first year to more than 100,000 in 1989. Both recruitment and exploited biomass showed different seasonal patterns between 1976-1983 and 1984-1988. Despite some uncertainty regarding these estimates, it is considered that major population tendencies are adequately represented by this analysis

Item Type: Article
Title: VPA estimates of fishing mortality and exploited biomass from Sardinella aurita catch-at-length data in eastern Venezuela
Personal Creator/Author:
CreatorsEmail
Mendoza, J.J.
Fréon, P.
Guzmán, R.
Journal or Publication Title: Naga, the ICLARM Quarterly
Volume: 17
Number: 4
Page Range: pp. 32-36
Date: 1994
ISSN: 0116-290X
Issuing Agency: WorldFish Center
Uncontrolled Keywords: Fishing mortality; Exploitation; Growth; Frequency analysis; Population dynamics; Biomass; Sardinella aurita
Subjects: Fisheries
Item ID: 9348
Depositing User: Mr William Ko
Date Deposited: 01 Dec 2012 07:10
Last Modified: 01 Dec 2012 07:10
URI: http://aquaticcommons.org/id/eprint/9348

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