A method of analysis of Sakhalin surf clam [Spisula sachalinensis] stock in dredge fishery, based on a dynamic model

A method of analysis of Sakhalin surf clam [Spisula sachalinensis] stock in dredge fishery, based on a dynamic model

A method of analysis was developed to estimate biomass and yield of Sakhalin surf clam Spisula sachalinensis through fishing season in dredge fishery. This model is based on successive growth process of shell size, and composed of three fundamental equations: biomass change, yield, and growth speed...

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Veröffentlicht in:NIPPON SUISAN GAKKAISHI 1989/03/25, Vol.55(3), pp.417-422
Hauptverfasser: Nakamura, Y. (Fukushima-ken. Fisheries Experiment Station, Iwaki (Japan)), Hirayama, N, Akimoto, Y
Format: Artikel
Sprache:eng ; jpn
Schlagworte:
DINAMICA DE LA POBLACION
DRAGADO
DRAGAGE
DREDGING
DYNAMIQUE DES POPULATIONS
EFFORT DE PECHE
ESFUERZO PESQUERO
FISHING EFFORT
GROWTH RATE
INDICE DE CRECIMIENTO
Marine
MODELE
MODELOS
POPULATION DYNAMICS
RENDEMENT
RENDIMIENTO
SPISULA
Spisula sachalinensis
TAUX DE CROISSANCE
YIELDS
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Beschreibung
Zusammenfassung:A method of analysis was developed to estimate biomass and yield of Sakhalin surf clam Spisula sachalinensis through fishing season in dredge fishery. This model is based on successive growth process of shell size, and composed of three fundamental equations: biomass change, yield, and growth speed of the shell during the fishing season. Solving the three equations simultaneously, the biomass and CPUE are calculated successively at each time. When applied to actual data of the dredge fishery, the method was found highly valid.
ISSN:0021-5392
1349-998X
DOI:10.2331/suisan.55.417