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Ecology and Conservation of Marine Mammals 
University of La Rochelle




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Marine Mammal Populations

The state of marine mammal population is a concept with a very large content that is often used fairly intuitively without reference to any clear definition. Several sets of criteria could be distinguished.

The status of conservation specifically deals with comparisons of current abundance and distribution data with a supposedly undisturbed initial situation where population would be in equilibrium with their habitats and resources. The demographic status describes fecundity and mortality parameters which may lead to changes in abundance and distribution. The health status of a population describes the main pathologies and causes of death, including nutritional state and contamination by pollutants, all being processes that determine reproduction and survival of individuals. 

Conservation status is the ultimate criteria allowing one to state that a population has changed. However, the demographic and health statuses of a population are also of great interest for management purpose as they permit on-going processes to be identified before they have fully produced their effects on population abundance and distribution, thus allowing adapted conservation decisions to be taken earlier.

Precocity in the decision process is essential for marine mammals since, because of their low fecundity, they recover slowly from degraded situations.


STRANDINGS


Detecting changes in species occurrence and distribution, determining  demographic and sanitary status
AT SEA SIGHTING


Detecting changes in cetacean relative abundance and distribution

BY-CATCH


Follow and understand the interactions with fisheries


SIGNAL YOUR SIGHTING OR STRANDING IN FRANCE AT THE +33 (0)5.46.44.99.10 - Website CRMM http://crmm.univ-lr.fr
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