Dynamic geography of small pelagic fish populations in the California Current System on the regimen time sacale (1931-1997)
Dynamic geography of small pelagic fish populations in the California Current System on the regimen time sacale (1931-1997)
复制标题
加州洋流系统中小型中上层鱼类种群在 sacale 时间（1931-1997）的动态地理
DOI：
10.1139/f02-142
复制
发表时间：
2002
影响因子：
2.4
通讯作者：
S. O. García
中科院分区：
文献类型：
--
作者：
R. Sánchez;D. Belda;Héctor Villalobos Ortíz;S. O. García
东北太平洋地区的气候变化似乎迫使太平洋沙丁鱼（Sardinops caeruleus）的种群规模发生变化，这与分布中心位置和生物量的主要地理变化有关。这些发现有助于解释沙丁鱼在大约60年前在加利福尼亚洋流系统北部消失，并在20世纪80年代之后回归的原因。这里所描述的空间过程不同于那些表明环境制度变化导致种群丰度逐渐增加-减少的过程，这些过程与其分布范围在固定地理中心周围的均匀扩张-收缩有关。沙丁鱼种群数量的变化似乎与环境变化有关，而北凤尾鱼（Engraulis mordax）丰度的空间格局似乎与沙丁鱼种群丰度呈负相关。在没有沙丁鱼或沙丁鱼数量低的地方，凤尾鱼的数量会增加。因此，从……
Climate regime shifts in the Northeast Pacific appear to have forced population size changes associated with major geographical variations in the position of the center of distribution and bulk of biomass of Pacific sardine (Sardinops caeruleus). These findings help explain the disappearance of sardines around 60 years ago at the northern part of the California Current System and their return following the 1980s. The spatial processes described here differ from those suggesting that environmental regime shifts lead to progressive increasedecrease of stock abundance associated with homogeneous expansioncontraction of its distribution range around a fixed geographical center. Sardine population changes are seemingly related to environmental variability, whereas the spatial pattern of abundance for the northern anchovy (Engraulis mordax) appears to be inversely related to sardine population abundance. Anchovies increased where and when sardines were either absent or at a low population level. Thus, from th...