BECAS
CUMPLIDO ESMORIS Mariano JosÉ
artículos
Título:
Gametogenic cycle of the marine gastropod Trophon geversianus in a harsh Patagonian intertidal environment
Autor/es:
MARIANO CUMPLIDO; MARIA CRISTINA DAMBORENEA; GREGORIO BIGATTI
Revista:
INVERTEBRATE REPRODUCTION & DEVELOPMENT
Editorial:
Taylor & Francis
Referencias:
Año: 2022 vol. 66 p. 135 - 146
Resumen:
The edible marine gastropod Trophon geversianus shows a large geographic distribution along thesouthern tip of South America, inhabiting both rocky intertidal and shallow subtidal zones, withdistinct behavioural responses to environmental stressful conditions (desiccation, temperatureamplitude and high irradiation). Nevertheless, its reproductive biology has been poorly reportedto date. We studied the gametogenic cycle of an intertidal rocky shore population from northernPatagonia (Argentina), in order to investigate the relation between gonadal changes and seasonalenvironmental variables. Mature individuals were taken monthly during an annual reproductiveseason and processed by standard histology procedures (haematoxylin and eosin). Adults ofT. geversianus registered different gonadal maturation stages along the year, showing a markedseasonal variation without a resting period. The highest gamete evacuation season in both sexeswas registered when the environmental stress was minimum (winter), while a greater number ofindividuals with gonads in proliferation and growth were predominant during maximum environmental stress (summer). The reproduction pattern presented an extended period of evacuation and a short phase of non-evacuation, associated to drastic seasonal environmental changes in the intertidal zone of Atlantic Patagonia. This information is useful to protect the resource and assure the sustainability of intertidal populations.