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Séminaire de Pierre Pepin (Northwest Atlantic Fisheries Centre, Canada)

Le 12 décembre 2016 à 11h00 à Wimereux salle de conférences MREN

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Séminaire de Pierre Pepin (Northwest Atlantic Fisheries Centre, Fisheries and Oceans Canada, 80 White Hills Road, St. John’s, Newfoundland & Labrador, Canada) intitulé :

The growth-survival paradigm : the view from a probabilistic framework

Date : Le 12 décembre 2016 à 11h00

Lieu : salle de conférences à la MREN (Wimereux)

Survival through the larval phase (e.g. from hatch to metamorphosis) is predicated on the probabilities of successful feeding, which dictates growth rates, the probabilities of encountering (or not) predators, and the likelihood that currents will carry an individual to a suitable habitat for further development. The growth-survival paradigm (GSP) centers on the concept that an individual with a high growth rate is expected, on average, to have a greater likelihood of surviving than another larva with a slower growth rate. In this presentation I will focus on how to take a probabilistic approach to the investigation of early life dynamics to assess how changes in the distribution of growth histories and mortality rates inform us of the processes that affect survival. The basic premise for this presentation is that functional relationships (e.g. regressions, GAMs, etc.) may not be sufficient to understand the processes that affect survivorship without consideration of the variance around the predicted value (i.e. average). I will seek to provide greater sense of the patterns of variance around average feeding, growth and mortality rates, how the variability in these vital rates changes in relation to the average, and why it may be important