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Family Growth and Survival Response to Two Simulated Water Temperature Environments in the Sea Urchin Strongylocentrotus intermedius

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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.

No MeSH data available.


Comparison of specific growth rate of body weight between high temperature (HE) and control temperature (CE) environments. In each month, lower-case letters (a, b) indicate the difference between temperatures, different letters represent significant difference (p < 0.05).
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ijms-17-01356-f003: Comparison of specific growth rate of body weight between high temperature (HE) and control temperature (CE) environments. In each month, lower-case letters (a, b) indicate the difference between temperatures, different letters represent significant difference (p < 0.05).

Mentions: In HE, the BW specific growth rate (SGR) of the surviving sea urchin was close to zero (Figure 3), signifying that these surviving sea urchins did not grow. To determine the relationship between body size and survival, BW between surviving and deceased sea urchins (15.14 ± 7.02 g and 15.17 ± 8.16 g, respectively) were compared using one-way ANOVA. No significant differences were discovered between them (p = 0.984).


Family Growth and Survival Response to Two Simulated Water Temperature Environments in the Sea Urchin Strongylocentrotus intermedius
Comparison of specific growth rate of body weight between high temperature (HE) and control temperature (CE) environments. In each month, lower-case letters (a, b) indicate the difference between temperatures, different letters represent significant difference (p < 0.05).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5037655&req=5

ijms-17-01356-f003: Comparison of specific growth rate of body weight between high temperature (HE) and control temperature (CE) environments. In each month, lower-case letters (a, b) indicate the difference between temperatures, different letters represent significant difference (p < 0.05).
Mentions: In HE, the BW specific growth rate (SGR) of the surviving sea urchin was close to zero (Figure 3), signifying that these surviving sea urchins did not grow. To determine the relationship between body size and survival, BW between surviving and deceased sea urchins (15.14 ± 7.02 g and 15.17 ± 8.16 g, respectively) were compared using one-way ANOVA. No significant differences were discovered between them (p = 0.984).

View Article: PubMed Central - PubMed

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&mdash;high temperature (HE) and control temperature (CE)&mdash;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 &lt; 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 &lt; 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.

No MeSH data available.