Développement du budget d'activité et du comportement de plongée chez le jeune phoque commun (Phoca vitulina) de l'Estuaire du Saint-Laurent au courant de la lactation

Authors: Lessard, Pierre-Etienne
Advisor: Turgeon, JulieHammill, M. O.
Abstract: Young mammals face a trade-off regarding the allocation of maternal energy: to build up body reserves or spend this energy to develop foraging skills. This study examined this conflict by monitoring growth and ontogeny of diving in 33 nursing harbour seal (Phoca vitulina) pups from the St. Lawrence River Estuary. Pups could be discriminated into frequent, intermediate and limited divers. Frequent and intermediate divers spent more time underwater, than limited divers. The daily amount of time dedicated to deeper and longer dives increased for frequent divers, remained unchanged for intermediate divers and decreased for limited divers. Such different aquatic training tactics prior to nutritional independence were also associated with greater growth rates exhibited by frequent and intermediate divers compared to that of limited divers. Higher growth and better diving ability may contribute to improving the probability of first year survival.
Document Type: Mémoire de maîtrise
Issue Date: 2014
Open Access Date: 20 April 2018
Permalink: http://hdl.handle.net/20.500.11794/25299
Grantor: Université Laval
Collection:Thèses et mémoires

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