title: Family Growth and Survival Response to Two Simulated Water Temperature Environments in the Sea Urchin Strongylocentrotus intermedius.
abstract: Heat tolerance is a target trait in the selective breeding of the sea urchin Strongylocentrotus intermedius, as it plays an important role in the survival and growth of cultured S. intermedius during summer. We investigated family growth and survival response to two temperature treatments to evaluate the genotype by temperature interaction (GEI) in the family selection of S. intermedius. Sea urchins from 11 families were exposed to two simulated water temperature environments-high temperature (HE) and control temperature (CE)-for 12 months, with each experiment divided into four periods (P1, stress-free period I; P2, stress-full high period; P3, stress-response period; and P4, stress-free period II) based on the temperature changes and the survival. Test diameter (TD), body weight (BW), and survival rate (SR) in HE and CE were measured monthly. Effects of family, temperature, and family-temperature interaction on TD, BW, SR, and specific growth rate (SGR) for BW were examined. In CE, BW differed significantly between families in P2, P3, and P4, while TD differed significantly between families in P3 and P4 (p < 0.05). In HE, family had significant effects on BW in P4, and on TD in P3 and P4, while temperature had significant effects on SR, TD, and BW in P3 and P4 (p < 0.05). GEI effects were not significant for TD or BW; however, family ranking changes revealed the existence of GEI in SR. The GEI results indicate the necessity of applying family selection in CE and HE for SR, but not for TD or BW. These results may provide a guide for aquaculture and selective breeding of S. intermedius under temperature pressure.
authors: Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China. yqchang@dlou.edu.cn.
authors: Yaqing
authors: Y
authors: Chang
authors: Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China. wangbei0303@yeah.net.
authors: Xiaofei
authors: X
authors: Tian
authors: Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China. zhangweijie5217@163.com.
authors: Weijie
authors: W
authors: Zhang
authors: Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China. fenjiehan@163.com.
authors: Fenjie
authors: F
authors: Han
authors: Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China. CS18842608395@126.com.
authors: Shun
authors: S
authors: Chen
authors: Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China. 13342258953@163.com.
authors: Mi
authors: M
authors: Zhou
authors: Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China. pangzsr@gmail.com.
authors: Zhenguo
authors: Z
authors: Pang
authors: Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China. qishoubing521@126.com.
authors: Shoubing
authors: S
authors: Qi
authors: Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China. wpfeng90@163.com.
authors: Wenping
authors: W
authors: Feng
mesh_terms: D000818:Animals; D017756:Aquaculture; D001947:Breeding; D059647:Gene-Environment Interaction; D018869:Heat-Shock Response; D012098:Reproduction; D047269:Strongylocentrotus / Q000235:genetics / Q000254:growth & development / Q000502:physiology*
keywords: Strongylocentrotus intermedius; genotype-environment interaction; growth; sea urchin; survival; temperature