Climate change has had large impacts on marine animals,including neon flying squid Ommastrephes bartramii(O.bartramii)in the North Pacific Ocean.O.bartramii statoliths from 2012,2015,and 2016 were used to evaluate the...Climate change has had large impacts on marine animals,including neon flying squid Ommastrephes bartramii(O.bartramii)in the North Pacific Ocean.O.bartramii statoliths from 2012,2015,and 2016 were used to evaluate the variations in life cycle events.The relationship between mantle length and body weight showed significant differences between years and gender.The oldest squid was collected in 2016 at 271 days old,further proving that O.bartramii has nearly a 1-year life span.The hatching season ranged from December to May and the peak hatching time in 2015 was one-half month later than in 2012 and 2016.Growth rates varied with environmental factors such as sea surface temperature(SST)and chlorophyll a concentration(chl.a),indicating that higher SST and chl.a concentrations led to faster growth.An extreme El Ni˜no event with lower SST in 2015 also led to younger age class and slower growth rates.The occurrence of differences in body size and growth rates between years,caused by the interannual variations of environmental factors,makes it necessary to use separate growth curves for different years when analyzing North Pacific O.Bartramii populations.展开更多
基金funded by the National Key R&D Program of China(2019YFD0901404)National Science Foundation of China(41876141)+1 种基金Shanghai Science and Technology Innovation Program(19DZ1207502)Fund of Key Laboratory of Open-Sea Fishery Development,Ministry of Agriculture,P.R.China(LOF 2018-02).
文摘Climate change has had large impacts on marine animals,including neon flying squid Ommastrephes bartramii(O.bartramii)in the North Pacific Ocean.O.bartramii statoliths from 2012,2015,and 2016 were used to evaluate the variations in life cycle events.The relationship between mantle length and body weight showed significant differences between years and gender.The oldest squid was collected in 2016 at 271 days old,further proving that O.bartramii has nearly a 1-year life span.The hatching season ranged from December to May and the peak hatching time in 2015 was one-half month later than in 2012 and 2016.Growth rates varied with environmental factors such as sea surface temperature(SST)and chlorophyll a concentration(chl.a),indicating that higher SST and chl.a concentrations led to faster growth.An extreme El Ni˜no event with lower SST in 2015 also led to younger age class and slower growth rates.The occurrence of differences in body size and growth rates between years,caused by the interannual variations of environmental factors,makes it necessary to use separate growth curves for different years when analyzing North Pacific O.Bartramii populations.
