Impact of Environment and Ontogeny on Relative Fecundity and Egg Quality of Female Oysters (Crassostrea virginica) from Four Sites in Northern Chesapeake Bay
| Autor: | Adriane K Michaelis, Stephanie T. Alexander, Kennedy T. Paynter, Heather N. Koopman, Hillary Lane Glandon, Emily A Vlahovich, Vincent Politano, Donald W. Meritt, Kimberly S. Reece |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Oyster animal structures media_common.quotation_subject Ontogeny Zoology Environment 010603 evolutionary biology 01 natural sciences Oogenesis biology.animal Animals Crassostrea Ovum media_common Maryland biology Ecology Chesapeake bay Reproduction 010604 marine biology & hydrobiology Fatty Acids fungi Age Factors food and beverages equipment and supplies biology.organism_classification Fecundity Bays Lipid content bacteria Female General Agricultural and Biological Sciences |
| Zdroj: | The Biological Bulletin. 231:185-198 |
| ISSN: | 1939-8697 0006-3185 |
| Popis: | Resource allocation to reproduction is a primary physiological concern for individuals, and can vary with age, environment, or a combination of both factors. In this study we quantified the impact of environment and individual age on the reproductive output of female oysters Crassostrea virginica. We determined the relative fecundity, egg total lipid content, and overall and omega-3/omega-6 (ω3/ω6) fatty acid signatures (FAS) of eggs spawned by female oysters over a 2-year period (n = 32 and n = 64). Variation was quantified spatially and ontogenetically by sampling young and old oyster populations from two rivers in Chesapeake Bay, totaling four collection sites. During Year 1, when oysters underwent oogenesis in different locations, overall and ω3/ω6 egg FAS varied significantly by river, with no significant differences observed in the FAS of oysters by age in Year 1. In Year 2, when oysters from different sites underwent oogenesis in a single location, no significant differences in the overall egg FAS or ω3/ω6 egg FAS by river or age were observed. These findings suggest that oysters integrate environment into their reproductive output, but that time spent growing at a specific location (in this case, represented by oyster age) plays a relatively minor role in the biochemical composition of oyster eggs. These results have consequences for our understanding of how resources are allocated from the female oyster to eggs and, more generally, the impact of environment and ontogeny on reproductive physiology. |
| Databáze: | OpenAIRE |
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