Effects of fishing on a protogynous hermaphrodite

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Abstract:

Population dynamic models and simulations are analysed for a harvested reef fish species that is a monandric, protogynous hermaphrodite. The models are applied to data for the coral trout Plectropomus leopardus (Pisces: Serranidae) on the Great Barrier Reef. One model examines the situation where sexual transition is induced by some exogenous behavioural mechanism, and another considers the case where transition is determined by some endogenous developmental schedule. The conclusions regarding the effects of fishing are common to both models, and the implementation of more efficient harvesting practices may not require a precise understanding of the mechanisms governing sexual transition.

On trouvera ici une analyse de modèles et de simulations de la dynamique d'une population de poissons de récif hermaphrodites monandres et protogynes qui est soumise à pêche commerciale. Les modèles ont été appliqués à des données provenant d'une population du serranidé, Plectropomus leopardus (Pisces: Serranidae), du récif de la Grande Barrière. L'un des modèles examine la situation où la transition sexuelle est causée par un mécanisme comportemental exogène et l'autre celle où cette transition est déterminé par un calendrier de développement endogène. Les effets de la pêche calculés à l'aide des deux modèles sont semblables; il n'est donc probablement pas nécessaire de connaître de façon précise les mécanismes qui régissent la transition sexuelle pour mettre en place des pratiques de pêche plus efficaces.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: March 1, 2001

More about this publication?
  • Published continuously since 1901 (under various titles), this monthly journal is the primary publishing vehicle for the multidisciplinary field of aquatic sciences. It publishes perspectives (syntheses, critiques, and re-evaluations), discussions (comments and replies), articles, and rapid communications, relating to current research on cells, organisms, populations, ecosystems, or processes that affect aquatic systems. The journal seeks to amplify, modify, question, or redirect accumulated knowledge in the field of fisheries and aquatic science. Occasional supplements are dedicated to single topics or to proceedings of international symposia.
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