Marine Ecology Progress Series | |
Offspring size and maternal environments mediate the early juvenile performance of two congeneric whelks | |
Alejandro P#xe9rez-Matus1  Nicole E. Phillips1  Sergio A. Carrasco1  | |
关键词: Progeny size; Reproductive strategies; Environmental variation; Phenotypic plasticity; Offspring size-fitness; Cominella; | |
DOI : 10.3354/meps09763 | |
学科分类:海洋学与技术 | |
来源: Inter-Research | |
【 摘 要 】
ABSTRACT: Offspring size variation can have pervasive ecological and evolutionary implications for both offspring and mother, affecting an organism’s performance throughout its life. Using 2 marine intertidal whelk species Cominella virgata and C. maculosa as model organisms, we examined how different maternal environments and contrasting hatchling size influence juvenile performance. The average size of field-collected hatchlings greatly differed between the species and at different scales of variation (i.e. among sites). Species-specific differences in hatching size were reflected in juvenile performance. Overall, C. virgata with larger hatchlings (~3 mm), exhibited faster growth rates and higher survival than the smaller C. maculosa (~1.5 mm). Desiccation treatment did not affect the performance of fed juveniles; however, large hatchlings had higher growth rates than small conspecifics for both species. Starved hatchlings of both species performed more poorly than fed ones; however, species-specific and size differences were less significant for the evaluated traits, suggesting a non-size-related allocation of resources and similar resource utilization during starvation conditions (i.e. within species). As has been described for many taxa, large offspring often perform better than small conspecifics; however, because this performance is likely context-dependent, understanding the importance of different scales of variation is crucial for determining when variation in size is an advantage or a disadvantage in terms of an organism’s performance.
【 授权许可】
Unknown
【 预 览 】
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RO201912010134997ZK.pdf | 8KB | download |