INVESTIGADORES
DOLDAN Maria Del Socorro
artículos
Título:
Population dynamics of the native oyster Ostrea puelchana d'Orbigny, 1842 in north-Patagonian gulfs, Argentina: a multiscale spatial approach
Autor/es:
DOLDAN, M. SOCORRO; OEHRENS KISSNER, ERICA; KROECK, MARINA; MORSAN, ENRIQUE M.
Revista:
MARINE ENVIRONMENTAL RESEARCH
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2021
ISSN:
0141-1136
Resumen:
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 José 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 envelope relationship between adult density and carriage incidence, suggesting a density-dependent compensation. Temporal data revealed decreased mean O. puelchana shell heights during recent decades. We discuss the success of extractive closures for long-term management and stress the effectiveness of a multiscale approach to determine the density-dependent processes structuring and driving marine-bivalve?population development.
