Population dynamics of the native oyster Ostrea puelchana d'Orbigny, 1842 in north-Patagonian gulfs, Argentina: a multiscale spatial approach
- Doldan, María del Socorro
- Oehrens Kissner, Erica Mercedes
- Kroeck, Marina Andrea
- Morsan, Enrique Mario
DOIAbstract
Global losses of oyster populations urgently necessitate evaluating the status of underdocumented populations. The north-Patagonian Ostrea puelchana metapopulation changed in recent decades: certain beds grew and expanded; others became depleted by the Bonamia exitiosa epizootic. We surveyed eight oyster beds from the San Matías and San Jos´e gulfs; assessing the extension, demographic structure, and density-distribution pattern of each. We integrated biologic and environmental data on different spatial and temporal scales. Beds from the northestern and southern coasts continued expanding; while the northwestern beds— decimated by B. exitiosa in mid-1990—evidenced signs of recovery. We observed an en velope relationship between adult densit...
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