Gadids and Alewives: Structure within complexity in the Gulf of Maine
Gadids and Alewives: Structure within complexity in the Gulf of Maine
复制标题
Gadids 和 Alewives：缅因湾复杂的结构
DOI：
10.1016/j.fishres.2012.09.011
复制
发表时间：
2013
影响因子：
2.4
通讯作者：
J. Lichter
中科院分区：
文献类型：
--
作者：
E. Ames;J. Lichter
大西洋鳕鱼（Gadus morhua）沿着北方240公里的新英格兰历史上多产的沿海大陆架的崩溃已经持续了近20年。常驻产卵群体及其亚种群已经消失，尚未恢复，导致当地底栖鱼类渔业崩溃。在同一时期，另外三种鳕，黑线鳕（Melanogrammus aeglefinus），狭鳕（Pollachius virens）和白色无须鳕（Urophyscus tenuis）沿着沿着北方沿海大陆架消失，引起了人们的关注，他们的居民沿海群体是集合种群的一部分，也可能已经消失。对20世纪20年代他们的分布和流动情况的分析似乎证实了这一点。这四个gadids有集群的居民沿海团体沿着沿海货架共存于同一地区。鳕鱼、白色无须鳕和鳕鱼似乎表现出集合种群特征，居民和迁徙成分沿海岸分布在三个不同的地区，迁徙成分沿着共同的迁徙路线到达和离开，当阿莱维夫离开时，迁徙成分就会沿着共同的迁徙路线到达和离开。这些群体集中在附近的河流与alewife产卵运行，并从该地区消失后，alewives（Alosa pseudoharengus）在20世纪50年代下降。研究结果表明，大，稳定的浓度的一年中的一年alewives是一个因素，在那里的居民和迁移gadid组位于。
The collapse of Atlantic cod (Gadus morhua) along the northern 240km of New England's historically productive coastal shelf has continued for nearly twenty years. Resident spawning groups and their subpopulations have disappeared and have yet to recover, causing local groundfish fisheries to collapse. Three additional gadid species, haddock (Melanogrammus aeglefinus), pollock (Pollachius virens), and white hake (Urophyscus tenuis) collapsed along the northern coastal shelf during the same period, raising concerns that their resident coastal groups were part of a metapopulation and may have also been lost. Analysis of their distribution and movements in the 1920s appeared to corroborate this. The four gadids had clusters of resident coastal groups along the coastal shelf that coexisted in the same area. Cod, white hake and pollock appeared to exhibit metapopulation characteristics, having resident and migrating components distributed along the coast in three different areas, with migrating components arriving and leaving along common migration routes fall when alewives left. The groups were centered near rivers with alewife spawning runs and disappeared from the area during the 1950s after alewives (Alosa pseudoharengus) declined locally. The results suggest that large, stable concentrations of young-of-the-year alewives were a factor in where resident and migrating gadid groups were located.