Gametogenesis in the Sunray VenusMacrocallista nimbosa(Bivalvia: Veneridae) in West Central Florida in Relation to Temperature and Food Supply
| Autor: | Bruce J. Barber |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
biology Ecology 010604 marine biology & hydrobiology Macrocallista nimbosa Zoology Venus Veneridae 04 agricultural and veterinary sciences Broodstock Aquatic Science biology.organism_classification Bivalvia Macrocallista 01 natural sciences Spawn (biology) 040102 fisheries 0401 agriculture forestry and fisheries Sex ratio |
| Zdroj: | Journal of Shellfish Research. 36:55-60 |
| ISSN: | 1943-6319 0730-8000 |
| DOI: | 10.2983/035.036.0107 |
| Popis: | In Florida, culture of the sunray venus Macrocallista nimbosa is currently limited by seed supply. Hatcheries have not been able to condition and spawn brood stock on a predictable and consistent basis. The objective of this study was to determine the relative effects that temperature and diet have on the natural gametogenic cycle of this species so that improved conditioning protocols can be established for this species. The sunray venus M. nimbosa from west central Florida (Anna Maria Island) reached sexual maturity at a shell length >35 mm (age 6–8 mo). Small clams (mean shell length: 60 mm) had a 1:1 sex ratio, whereas larger clams (mean shell length: 129 mm) were predominantly female. This species exhibited a poorly defined annual reproductive cycle, and development was not synchronous between the sexes. Males developed mostly over the cooler months and spawned in the spring and early summer. Females exhibited two periods of relatively greater development: June to October and December to Feb... |
| Databáze: | OpenAIRE |
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