Dear colleagues,
My co-authors and I are pleased to announce the publication of
our article:
Peltier, H., Authier, M., Dabin, W., Daniel, P., Dars, C.,
Demaret,
F., Meheust, E., Ridoux, V., Spitz, J., Van-Canneyt, O., 2025. I sink therefore I
am:
20 years of tagging small cetacean carcasses in the North-East
Atlantic
for bycatch estimation. J. Nat.
Conserv.
87, 127005. https://doi.org/10.1016/j.jnc.2025.127005
Abstract: For common dolphin (Delphinus delphis Linnaeus, 1758)
and harbour porpoise (Phocoena phocoena Linnaeus, 1758), bycatch
levels exceed the thresholds in the North-East Atlantic. Reverse
drift modelling was developed to infer bycatch from stranding
data. It is then necessary to define three parameters: the
proportion of carcasses that float, the probability of a floating
carcass drifting until stranding; and finally, the proportion of
beached carcasses that are discovered and reported. The proportion
of floating carcasses is the most influential corrective factor in
the reverse drift modelling process. The objective of this study
is to provide a better estimation of this proportion following
bycatch in fishing gear. The predicted drift of 455 common
dolphins and harbour porpoises that were tagged and discarded by
fishing vessels was calculated by a drift prediction model
(MOTHY). Of the tags deployed, stranding was predicted for 309
carcasses (278 common dolphins and 31 harbour porpoises), and 84
animals were discovered (78 common dolphins and 6 harbour
porpoises). Bycatch in trammel nets and in midwater pair trawls
resulted in a higher probability of these carcasses being
recovered stranded. The predicted duration of the drift, on the
other hand, had a negative effect on the number of strandings
observed. The percentage of harbour porpoises that float was 27%
(95% CI [12%,43%]), while it was 31% (95% CI [24%, 39%]) for
common dolphins. These results contribute to the improvement of
estimates of bycatch of small cetaceans inferred from strandings,
which are used to inform conservation measures, particularly for
the common dolphin in the North-East Atlantic.
You can download
this Open Access paper here:
https://www.sciencedirect.com/science/article/pii/S1617138125001827
Enjoy your reading!
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habituelles.
I have
sent this email at a time that is convenient for me. I
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Hélène Peltier -PhD
Observatoire PELAGIS – UAR 3462 La Rochelle Université -
CNRS
Pôle Analytique
5, Allées de l'Océan
17000 La Rochelle, FRANCE
St: 05 46 44 99 10
LD: 05 46 50 76 83
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"S'il
n'y a pas de solution, c'est qu'il n'y a pas de problème"
proverbe Shadockien.