New South Wales Department of Primary Industries, Fisheries Conservation Technology Unit, National Marine Science Centre, Coffs Harbour, NSW 2450, Australia.
J Fish Biol. 2012 Mar;80(3):638-50. doi: 10.1111/j.1095-8649.2011.03202.x.
This study assessed the mortality of 157 snapper Pagrus auratus (9-29 cm, total length, L(T) ) after being conventionally angled and then released into cages (along with 48 controls) for 4 days off south-eastern Australia. Fatalities were restricted to 12 angled fish (7·6%) and mostly attributed to the ingestion of hooks and especially their subsequent removal, which caused substantial blood loss and immediate death. Hook ingestion was significantly biased towards smaller fish (<21 cm L(T)) and attributed to a lower chance of anglers initially detecting these individuals on the line (allowing them to consume more of the baits). While mortalities might be reduced in future via (1) choosing terminal rigs that promote mouth hooking and (2) cutting the line on any-hook ingested fish, the results nevertheless validate releasing unwanted angled inshore juvenile P. auratus as a means for managing their exploitation.
本研究评估了在澳大利亚东南部,将 157 尾金鲷 Pagrus auratus(9-29 厘米,全长,L(T))用传统钓法钓起并放回笼子中(与 48 尾对照鱼一起)4 天后的死亡率。死亡仅限于 12 尾钓获鱼(7.6%),主要归因于鱼钩的吞食,尤其是鱼钩随后被取出,这导致了大量的血液流失和立即死亡。鱼钩的吞食明显偏向于较小的鱼(<21 厘米 L(T)),这归因于钓手最初在线上发现这些个体的机会较低(让它们更多地吞食诱饵)。虽然未来可以通过(1)选择促进口钩的终端钓具,以及(2)在任何钩鱼被吞食时切断鱼线,来降低死亡率,但这些结果仍然验证了将不需要的近海幼年金鲷放流作为管理其捕捞的一种手段。