[MARMAM] new article on strandings as indicators of cetacean populations

Hélène Peltier hpeltier at univ-lr.fr
Mon Feb 10 06:49:59 PST 2014


Dear colleagues,

I am glad to inform you that following article was recently published in 
Ecological Indicators:
<http://www.sciencedirect.com/science/article/pii/S1470160X13005153>

Peltier, H., P. D. Jepson, W. Dabin, R. Deaville, O. Van Canneyt, P. 
Daniel, and V. Ridoux. (2014). THE CONTRIBUTION OF STRANDING DATA TO 
MONITORING AND CONSERVATION STRATEGIES FOR CETACEANS: DEVELOPING 
SPATIALLY EXPLICIT MORTALITY INDICATORS FOR COMMON DOLPHINS (DELPHINUS 
DELPHIS) IN THE EASTERN NORTH-ATLANTIC. Ecological Indicators, 39, 203-214.

Abstract

Cetacean strandings are an important source of information on cetacean 
population status and of biological samples. Nevertheless, collecting 
stranding data remains opportunistic and their representativity must be 
improved. The aim of this study was to improve the ecological 
significance of strandings, through the determination of stranded common 
dolphin origin found along the coasts of the Channel and the Bay of 
Biscay, by using the drift prediction model MOTHY. In order to map 
inferred distribution of dead dolphins, origin of strandings were 
weighted by the probability that cetaceans dying at sea become stranded. 
The difference between observed stranding origin and origin of expected 
strandings under the hypothesis of spatial and temporal uniformity of 
dead cetaceans, constituted the anomaly in stranding origin. Between 
1990 and 2009, 6182 common dolphin strandings were reported by the UK 
and French stranding networks. Distribution inferred from strandings 
suggested that common dolphins died mostly in the neritic Bay of Biscay. 
The anomaly in stranding origin was maximal in the southern Bay of 
Biscay, highlighted as an area of high relative abundance or strong 
mortality for common dolphin. The monthly decomposition of this anomaly 
showed that positive anomaly was located in the southern Bay of Biscay 
in winter and expanded northward over the whole Bay of Biscay and 
western Channel in spring and summer. These results were consistent with 
current knowledge on common dolphin distribution and provide new insight 
on strandings as cetacean population indicators. These parameters are 
essential components for assessing the conservation status of vulnerable 
populations.

The pdf is available on request.

Please note too that recent article on stranding anomaly of harbor 
porpoises published in Plos ONE was corrected.
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0062180

Best wishes
Helene Peltier.

-- 

Hélène PELTIER -PhD

Observatoire PELAGIS UMS 3462
Université de La Rochelle-CNRS
5, allées de l'océan
17000 La Rochelle, France


hpeltier at univ-lr.fr

+33 (0) 16 49 67 82 /+33 (0) 6 82 74 08 41

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