Length –Weight Relationship, Body Condition and Growth Parameters of the Deep-Water Rose Shrimp Parapenaeus longirostris (Decapoda, Dendrobranchiata) in GFCM- GSA04 (Central and Eastern Algeria)

Et Al., Imen

doi:10.21608/ejabf.2024.393895

Length –Weight Relationship, Body Condition and Growth Parameters of the Deep-Water Rose Shrimp Parapenaeus longirostris (Decapoda, Dendrobranchiata) in GFCM- GSA04 (Central and Eastern Algeria)

Author

Imen et al.

10.21608/ejabf.2024.393895

Abstract

Along the Algerian coast (GFCM-GSA04), the deep-water rose shrimp, Parapenaeus longirostris (Lucas, 1846), holds significant socio-economic value, yet its biological characteristics remain understudied. To fill this gap, the present study aimed to describe key traits of the species, including length-weight relationships (LWR), condition factors (CF), and growth parameters for 1560 specimens collected from commercial landings at four major harbors along the central and eastern coasts: Tenes (TN), Algiers (AL), Bejaia (BE), and Jijel (JL). The results revealed a negative allometric growth pattern, with the exponent b significantly less than 3 at all sites. The mean condition factor values averaged slightly above the unit, indicating a satisfactory condition with no significant spatial variation. The von Bertalanffy growth parameters were estimated as follows: TN: CL∞= 46.73 mm, K= 0.41 y-1, and t0 = -0.3555; AL: CL∞ = 44.63mm, K = 0.5 y-1, and t0 = -0.293; BE: CL∞ = 34.13 mm, K = 0.69 y-1, and t0 = -0.2258; JL: CL∞ = 41.48mm, K = 0.57 y-1, and t0 = -0.2609. These findings provide significant insights into the growth dynamics of P. longirostris, offering potential applications for the species' fishery management in Algeria.

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