Long-term changes in the trophic level of western Mediterranean fishery and aquaculture landings
Long-term changes in the trophic level of western Mediterranean fishery and aquaculture landings
复制标题
西地中海渔业和水产养殖上岸营养级的长期变化
DOI：
10.1139/f03-016
复制
发表时间：
2003
影响因子：
2.4
通讯作者：
F. Badalamenti
中科院分区：
文献类型：
--
作者：
J. Pinnegar;N. Polunin;F. Badalamenti
我们利用氮稳定同位素分析得出的营养级 (TL) 估计值，结合地中海渔业总委员会 (GFCM) 整理的地理详细渔业数据，探讨了西地中海渔业和水产养殖登陆量的变化。我们的分析证实了之前的建议，即地中海登陆的平均营养水平显着下降（26 年来下降了约 0.15 TL）。然而，这种下降几乎完全是由于海水养殖双壳类软体动物上岸量增加的结果，而不是由于捕捞渔业上岸量变化造成的。自 1973 年以来，有鳍鱼类登陆量的平均营养级没有发生显着变化，尽管鱼类和总登陆量都显着变得更加多样化。对小型中上层鱼类登陆的检查显示，凤尾鱼的贡献显着下降，并被沙丁鱼取代。自1981年以来，网箱养殖高营养级物种，如鲈鱼（D...
We explored changes in western Mediterranean fishery and aquaculture landings using trophic level (TL) estimates derived from nitrogen stable isotope analysis combined with geographically detailed fishery data collated by the General Fisheries Council for the Mediterranean (GFCM). Our analyses confirmed earlier suggestions that there has been a significant decline in the mean trophic level of Mediterranean landings (by ~0.15 TL over 26 years). However, this decline is suggested to be almost entirely a result of increased landings of bivalve molluscs from mariculture and not due to changes in landings from capture fisheries. The mean trophic level of finfish landings has not changed significantly since 1973, although both fish and total landings have become significantly more diverse. Inspection of small pelagic fish landings revealed a marked decrease in the contribution played by anchovy and replacement of this species by sardine. Since 1981, cage culture of high trophic level species such as sea bass (D...