Non‐commercial invertebrate discards in an experimental trammel net fishery
作者： J. M. S. GONÇALVES , L. BENTES , R. COELHO , P. MONTEIRO , J. RIBEIRO
DOI: 10.1111/J.1365-2400.2008.00607.X
关键词:
摘要: Non-commercial invertebrate discards in an experimental trammel net fishery were studied relation to selectivity of the gear, depth, soak time and season. Forty fishing trials carried out over a 1-year period with six combinations small mesh (100, 120 140 mm) inner large (600 800 mm) outer panels. On average, 43.8 ± 12.2 (SD) (individuals 1000 m−1 net) non-commercial invertebrates discarded, accounting for 48% 65% total catch by numbers, respectively. Within discards, most abundant species number Phallusia mammillata (Cuvier) (27.5%), Cymbium olla (L.) (13.0%), Sphaerechinus granularis (Lamarck) (11.3%), Paracentrotus lividus (10.9%), Astropartus mediterraneus (Risso) (8.2%) Astropecten aranciacus (8.1%); Echinoderms (43.1%) particularly important. The highest lowest discard ratios found autumn winter, Discards generally decreased varied considerably not related size combinations. Trammel nets seem be important gear terms ecological impacts on benthic compared other coastal gears at depths (15–60 m).
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