Abstract: Energy density and its impact factors were investigated in gonads of samples of Alaska pollock Gaduschalcogrammus collected in Western Bering Sea from June to September in 2017 and from August to October in 2018 in order to know the energy change process during the development and reproduction of Alaska pollock by Generalized additive model (GAM). The results showed that there was significant difference in the energy density of pollock gonad in 2017 [(22.28±1.37) kJ/g] and 2018 [(24.27±1.09) kJ/g](t=3.481， P<0.05), with total explained rates of 25.2% and 8.82% for deviation derived based on GAM, respectively. The maximal contributed factor impacting energy density in both years was found to be maturity stage, namely, slow increase in energy density in the early development stage of the gonad, and rapid increase in energy density after mature, with the maximal value during spawning period. The whole process of energy density change was considered as the process that shifts from the fish growth in the early development to the rapid growth of gonadal tissue, and significantly affected by the degree of individual development (P<0.05). The findings provide basic data with understanding of energy allocation strategy of Alaska pollock during reproductive development.
黄开, 韦贝贝, 朱国平. 西白令海夏季狭鳕性腺组织能量密度的影响因素分析[J]. 大连海洋大学学报, 2020, 35(4): 564-583.
HUANG Kai, WEI Beibei, ZHU Guoping, . Evaluation of factors affecting energy density of gonad of Alaska pollock Gadus chalcogrammus in the Western Bering Sea during summer. Journal of Dalian Ocean University, 2020, 35(4): 564-583.
2020, Vol. 35 
