Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 21, Issue 2, 2019; Page No.(339-346)

GROWTH PARAMETERS, MORTALITY RATE AND EXPLOITATION OF JINGGA SHRIMP METAPENAEUS AFFINIS (H. MILNE EDWARDS, 1837) ON THE NORTH COAST OF CENTRAL JAVA, INDONESIA

SURADI WIJAYA SAPUTRA, ANHAR SOLICHIN, WIWIET TEGUH TAUFANI AND AGUS SABDONO

Abstract

This research aims at studying the growth parameters, the first size of captured (Lc), the first size of gonad mature, mortality, recruitment pattern, and the exploitation rate of Metapenaeus affinis in the North coast of Central Java, Indonesia. The field research activities were conducted from May 2016 to April 2017 using the survey method and direct observations on the catch area of fishing units. The results showed that the relationship between the total length and weight of female shrimp was isometric, while male shrimp was negative allometric. Based on the value of the condition factor, female shrimp was fatter than males shrimp. Recruitment season of M. affinis shrimp occurred when it was in total length mode of 80 mm. Male shrimp recruitment season occurs from March to June, while female shrimp one happened from May to August. The infinity length (L") was estimated at 168 mmTL (male) and 178.5 mmTL (female), with a growth curve index (K) was 1.8 yr-1 (male) and 1.91 yr-1 (female). The total length of the first capture for the male shrimp was 76.4 mmTL and 63 mmTL for females. The total length of first sexual mature is 116 mmTL. The total mortality (Z) was estimated at 6.91 yr-1 (male) and 4.62 yr-1 (female), natural mortality (M) is 1.23 yr-1 (male) and 1.6 yr-1 (female), and fishing mortality (F) of 5.68 yr-1 (male) and 3.02 yr-1 (female). The exploitation rate as much as 0.84 yr-1 (male) and 0.65 yr-1 for female have exceeded the optimum exploitation limit (0.5 yr-1).

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