海洋环境变化对北太平洋柔鱼个体生长的影响

海洋环境变化会对海洋生物个体大小及其生长产生影响,特别是短生命周期的种类.为此根据2009—2012、2015—2016年8—10月采集的6091尾北太平洋柔鱼样本,对其渔业生物学特征进行了研究,并分析海洋环境因子对其个体生长的影响.结果显示,雌雄个体生物学特征在不同海洋环境年均存在显著差异.柔鱼胴长与太平洋年代际涛动...

Effects of marine environment variation on the growth of neon flying squid (Ommastrephes bartramii) in the north Pacific Ocean

Marine environment variation has a profound impact on the marine organisms and their growth, especially for the short life span species. Based on 6091 samples of neon flying squid (Ommastrephes bartramii) collected from August to October in 2009 to 2012 and 2015 to 2016 in the north Pacific Ocean, the fisheries biological characteristics combined with the marine environmental factors of O. bartramii were studied. The result indicated that significant difference of fisheries biological characteristics was found between different sexes and marine environment years. The mantle length of O. bartramii was positive correlated to the Pacific Decadal Oscillation index with one-year lag. Samples in El Ni?o years were lager than those in La Ni?a years, while individuals in El Ni?o year with very strong intensity were the smallest of all. The El Ni?o event with very strong intensity caused lower sea surface temperature (SST) and Chlorophyll a (Chl. a) concentration was not beneficial to the growth and their mature of O. bartramii, while higher SST and Chl. a concentration provided favorable environment for O. bartramii with a larger body size and early maturement. The fisheries biological characteristics had significant different between different marine environment years, and the synthetic influence of PDO, El Ni?o/La Ni?a, SST and Chl. a concentration is the dominate factor that affect the growth of O. bartramii.