Fishery status of the longnose parrotfish, Hipposcarus harid (Forsskal, 1775) in the southern Red Sea, Shalateen, Egypt.

M. Amin, Amal; A. El-Ganainy, Azza; M. Sabrah, Manal

doi:10.21608/ejabf.2019.68009

Fishery status of the longnose parrotfish, Hipposcarus harid (Forsskal, 1775) in the southern Red Sea, Shalateen, Egypt.

Document Type : Original Article

Authors

10.21608/ejabf.2019.68009

Abstract

This is the first analysis for estimating the essential fisheries indices for Hipposcarus haridfrom Shalateen fishing port on the northern Red Sea coast of Egypt. The age was predicted by using scales reading for 179 fish collected through the fishing season from 2014 to 2016. Six age groups were observed for sexes combined. Calculated "b" value was 2.899 showed negative allometric growth. The estimated Von Bertalanffy growth parameters was L_∞ = 55.95 cm, K = 0.22 year^-1and t₀ = -0.724year¹. The rate of total mortality (Z) was (1 year^–1), natural mortality (M) was 0.30 lower than the fishing mortality (F= 0.70). The exploitation ratio (E = 0.70) was higher and exceeded the 0.5 optimal values for sustainable yield. The length at first capture (Lc= 20.6cm, 1.3year) was lower than the length at first sexual maturity (Lm= 22.3 and 23.5 cm; 1.6 and 1.8 years) for males and females respectively). In addition, (F=0.70 year^–1) was higher than the target biological reference point (F_opt=0.15; F_limi= 0.2; F_max =0.43 and F_0.10=0.3). By using the reference points of E_max, E_0.1,and E_0.5, current exploitation rates suggest unsustainable stocks for this species in the Shalateen fishing port.

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