[MARMAM] new article on common dolphin -fishery interactions

Hélène Peltier hpeltier at univ-lr.fr
Mon Dec 23 08:24:34 PST 2019

Dear colleagues,

My co-authors and I are pleased to announce you the publication of a new 
article : /

Peltier, H., Authier, M., Dabin, W., Dars, C., Demaret, F., Doremus, G., 
Van Canneyt, O., Laran, S., Mendez-Fernandez, P., Spitz, J., Daniel, P., 
Ridoux, V. /(/2020) /Can modelling the drift of bycaught dolphin 
stranded carcasses help identify involved fisheries? An exploratory 
study. /Global Ecology and Conservation. vol. 21. e00843.

The aim of this work is to test an approach that could help identify the 
fisheries potentially involved in a given stranding event. We explored 
this methodology during the multiple stranding event of common dolphins 
in winter 2017 along  the French Atlantic coasts, related to fishery 


Between the 1st of February and the March 31, 2017, 793 stranded 
cetaceans were found along the French Atlantic coasts. Common dolphins 
made up 84% of these strandings, and most of these presented evidence of 
death in fishing gear. The aim of this work is to test an approach that 
could help identify the fisheries potentially involved in a given 
stranding event. To do this we examined how the distributions of likely 
areas of mortality of bycaught dolphins, inferred from carcass drift 
modelling, coincide with fishing effort statistics of various fleets, 
generated from the Vessel Monitoring System, in the area over the same 
dates. Using reverse drift modelling, two main mortality areas were 
identified. A total of 3690 common dolphins (IC95% [2230; 6900]) were 
estimated to have died in fishing gear within the Bay of Biscay during 
this unusual stranding event. There was a positive correlation between 
the origin of stranded bycaught dolphins and the fishing effort 
distribution of French midwater pair trawlers, Spanish otter bottom 
trawlers and French Danish seiners. This co-occurrence highlights a risk 
and identifies fisheries that require further investigation (through 
observers or e-monitoring). These fisheries differed in their fishing 
gear, but two characteristics appear to be shared: they targeted 
predatory fishes (sea bass and hake) in winter and used high vertical 
opening gear.

The paper is freely available online:


We wish you great Christmas holidays!

Best wishes

On behalf of all co-authors, Helene Peltier



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

LD: +33 (0) 5 46 50 76 83
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