A model for energetics and bioaccumulation in marine mammals with applications to the right whale
Nisbet, Roger M.
Neubert, Michael G.
MetadataShow full item record
KeywordBioaccumulation; Dynamic energy budget (DEB); Model; Energy intake and utilization; Eubalaena glacialis; Lipophilic; Marine mammal; North Atlantic right whale growth and reproduction; PCB; Toxicant transfer
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.
Author Posting. © Ecological Society of America, 2007. This article is posted here by permission of Ecological Society of America for personal use, not for redistribution. The definitive version was published in Ecological Applications 17 (2007): 2233–2250, doi:10.1890/06-0426.1.
Suggested CitationEcological Applications 17 (2007): 2233–2250
Showing items related by title, author, creator and subject.
Dynamic energy budgets and bioaccumulation : a model for marine mammals and marine mammal populations Klanjscek, Tin (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2006-06)Energy intake of individuals affects growth of organisms and, therefore, populations. Persistent lipophilic toxicants acquired with the energy can bioaccumulate and harm individuals. Marine mammals are particularly ...
Biomechanics of North Atlantic right whale bone : mandibular fracture as a fatal endpoint for blunt vessel-whale collision modeling Campbell-Malone, Regina (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2007-09)The North Atlantic right whale, Eubalaena glacialis, one of the most critically endangered whales in the world, is subject to high anthropogenic mortality. Vessel-whale collisions and entanglement in fishing gear were ...
Teuten, Emma L.; Reddy, Christopher M. (2006-07-24)To provide additional evidence that several halogenated organic compounds (HOCs) found in environmental samples are natural and not industrially produced, we analyzed an archived whale oil sample collected in 1921 from the ...