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Social and Behavioural Factors in Cetacean Responses to Overexploitation: Are Odontocetes Less “Resilient” Than Mysticetes?
Joint Authors
Reeves, Randall R.
Wade, Paul R.
Mesnick, Sarah L.
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-07-29
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Earth Science , Water and Environment
Abstract EN
Many severely depleted populations of baleen whales (Mysticeti) have exhibited clear signs of recovery whereas there are few examples in toothed whales (Odontoceti).
We hypothesize that this difference is due, at least in part, to social and behavioural factors.
Clearly, a part of the lack of resilience to exploitation is explained by odontocete life history.
However, an additional factor may be the highly social nature of many odontocetes in which survival and reproductive success may depend on: (a) social cohesion and organization, (b) mutual defence against predators and possible alloparental care, (c) inter-generational transfer of “knowledge”, and (d) leadership by older individuals.
We found little evidence of strong recovery in any of the depleted populations examined.
Their relatively low potential rates of increase mean that odontocete populations can be over-exploited with take rates of only a few percent per year.
Exploitation can have effects beyond the dynamics of individual removals.
Four species showed evidence of a decrease in birth rates following exploitation; potential mechanisms include a deficit of adult females, a deficit of adult males, and disruption of mating systems.
The evidence for a lack of strong recovery in heavily exploited odontocete populations indicates that management should be more precautionary.
American Psychological Association (APA)
Wade, Paul R.& Reeves, Randall R.& Mesnick, Sarah L.. 2012. Social and Behavioural Factors in Cetacean Responses to Overexploitation: Are Odontocetes Less “Resilient” Than Mysticetes?. Journal of Marine Sciences،Vol. 2012, no. 2012, pp.1-15.
https://search.emarefa.net/detail/BIM-997009
Modern Language Association (MLA)
Wade, Paul R.…[et al.]. Social and Behavioural Factors in Cetacean Responses to Overexploitation: Are Odontocetes Less “Resilient” Than Mysticetes?. Journal of Marine Sciences No. 2012 (2012), pp.1-15.
https://search.emarefa.net/detail/BIM-997009
American Medical Association (AMA)
Wade, Paul R.& Reeves, Randall R.& Mesnick, Sarah L.. Social and Behavioural Factors in Cetacean Responses to Overexploitation: Are Odontocetes Less “Resilient” Than Mysticetes?. Journal of Marine Sciences. 2012. Vol. 2012, no. 2012, pp.1-15.
https://search.emarefa.net/detail/BIM-997009
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-997009