Estimating a new suitable catch size for two clam species: Implications for shellfishery management

摘要: Abstract The present study analyzes the weight gain patterns per unit of size and estimates minimum suitable catch two clam species: carpet shell Ruditapes decussatus Manila philippinarum . For this purpose, data from largest estuaries along northern coast Spain (Cantabrian Sea) were used. length–weight relationship both studied species was estimated using models: a classic allometric model nonparametric regression based on local linear kernel smoothers. Additionally, first derivatives used to estimate capture for species, corresponding at which derivative reached maximum. Within context, models application showed (a) resulted in better fit (b) different sizes each maximum length (49.5 mm R. decussatus 44.7 mm R. philippinarum ), considerably larger than currently established EU (c) an effect zones individuals patterns. This confirmed as alternative approach analyze capture. specific obtained could lead increase available commercial stocks positive effects conservation native species. In addition, zone-specific weight-gain support zone-based management. Therefore, provides preliminary starting point consider revision legal order improve current shellfishery management model.