Fishery of the Deep-water Rose Shrimp Parapenaeus longirostris (Lucas, 1846) (Crustacea: Decapoda) in the Northern Tyrrhenian Sea (Western Mediterranean) |
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Authors: | Mario Sbrana Claudio Viva Paola Belcari |
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Institution: | (1) Centro Interuniversitario di Biologia Marina ed Ecologia Applicata, Viale Nazario Sauro 4, 57127 Livorno, Italy;(2) Dipartimento di Scienze dell’Uomo e dell’Ambiente, Università di Pisa, Via Volta 6, 56126 Pisa, Italy |
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Abstract: | The aim of this study is to provide information on the fishing pattern of Parapenaeus longirostris in the northern Tyrrhenian Sea (western Mediterranean), in order to improve the management of the resource in the area. Data
were obtained from commercial fishery, covering the period 1991–2002. Catch rates revealed notable inter-annual fluctuation
of the P. longirostris landing, probably due to the life cycle of the species. The highest yields (kg per hour of trawl) of the commercial fishery
were obtained at depths ranging between 180 and 300 m, the lower ones at depths between 100 and 180 m, where small specimens
are more abundant. Commercial catches were characterised by a very low presence of specimens smaller than 20 mm carapace length
(CL), mainly due to the deeper localisation of the fishing grounds when compared to the recruitment areas of the species.
The size at which 50% of the specimens were discarded by the fishermen was 15 mm CL, while the estimated size at first capture
of the individuals caught by the commercial net was 12.4 mm CL. |
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Keywords: | Parapenaeus longirostris deep-water rose shrimp fishery selectivity discard western Mediterranean |
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