期刊
MARINE ENVIRONMENTAL RESEARCH
卷 169, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2021.105353
关键词
Carryover effects; Egg capsules; Embryos; Feeding rate; Growth rate; Hatching size; Nurse eggs; Oxygen consumption rate
资金
- Fondo Nacional de Investigacion Cientifica y Tecnologica (FONDECYT Chile) [1180643]
- ANID-Chile (REDES) [190027 UACh]
- FONDECYT Chile [11190720]
Encapsulated development with extraembryonic yolk can lead to competition for nutrients within egg capsules. Research found that more crowded egg capsules resulted in lower survival rates for juveniles, while individuals hatching from less crowded capsules showed better performance initially. However, over time, the largest surviving juveniles became the best performers, regardless of initial embryo density within the capsules.
Encapsulated development with extraembryonic yolk may lead to competition for nutrients within egg capsules. In this research, different degrees of competition among embryos in subtidal egg capsules of Acanthina monodon resulted in considerable differences in hatching size. For newly hatched juveniles, individuals hatching from less crowded egg capsules showed better survival, larger SL, higher rates of oxygen consumption, and higher rates of food consumption. However, by 28 days after hatching, the largest surviving juveniles were the best-performing individuals, regardless of the initial embryo density within the capsules. In summary, more crowded egg capsules resulted in poorer survival. These findings may help to explain the variability seen in juvenile success in some field populations; much of that variation may reflect stressful experiences that the new recruits have had during the early stages of their encapsulated development.
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