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A model for energetics and bioaccumulation in marine mammals with applications to the right whale

Klanjšček, Tin; Nisbet, Roger M.; Caswell, Hal; Neubert, Michael G. (2007) A model for energetics and bioaccumulation in marine mammals with applications to the right whale. Ecological applications, 17 (8). pp. 2233-2250. ISSN 1051-0761

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We present a dynamic energy budget (DEB) model for marine mammals, coupled with a pharmacokinetic model of a lipophilic persistent toxicant. Inputs to the model are energy availability and lipid-normalized toxicant concentration in the environment. The model predicts individual growth, reproduction, bioaccumulation, and transfer of energy and toxicant from mothers to their young. We estimated all model parameters for the right whale ; with these parameters, reduction in energy availability increases the age at first parturition, increases intervals between reproductive events, reduces the organisms' ability to buffer seasonal fluctuations, and increases its susceptibility to temporal shifts in the seasonal peak of energy availability. Reduction in energy intake increases bioaccumulation and the amount of toxicant transferred from mother to each offspring. With high energy availability, the toxicant load of offspring decreases with birth order. Contrary to expectations, this ordering may be reversed with lower energy availability. Although demonstrated with parameters for the right whale, these relationships between energy intake and energetics and pharmacokinetics of organisms are likely to be much more general. Results specific to right whales include energy assimilation estimates for the North Atlantic and southern right whale, influences of history of energy availability on reproduction, and a relationship between ages at first parturition and calving intervals. Our model provides a platform for further analyses of both individual and population responses of marine mammals to pollution, and to changes in energy availability, including those likely to arise through climate change.

Item Type: Article
Uncontrolled Keywords: bioaccumulation; dynamic energy budget (DEB) model; energy intake and utilization; Eubalaena glacialis; lipophilic; marine mammal; North Atlantic right whale growth and reproduction; PCB; toxicant transfer
Subjects: NATURAL SCIENCES > Mathematics
NATURAL SCIENCES > Mathematics > Applied Mathematics and Mathematical Modeling
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Environmental Science
Divisions: Division for Marine and Enviromental Research
Project titleProject leaderProject codeProject type
Ecological modelling for sustainable management of resources (Ekološko modeliranje za održivo upravljanje resursima)-Tarzan Legović098-0982934-2719MZOS
Depositing User: Tin Klanjšček
Date Deposited: 05 Nov 2015 13:39
DOI: 10.1890/06-0426.1

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