[MARMAM] New publication

Charlotte Lambert charlotte.lambert at univ-lr.fr
Wed Nov 7 00:19:52 PST 2018


Dear MARMAM readers,

We are pleased to announce the publication of
the article _"Hide and seek in the Bay of Biscay--a functional
investigation of marine megafauna and small pelagic fish interactions"_
in ICES Journal of Marine Science. 
By C. Lambert, M. Authier, M. Doray,
G. Dorémus, J. Spitz and V. Ridoux
https://doi.org/10.1093/icesjms/fsy143 [1]


Prey and predator
distributions influence one another. Understanding the scale and the
orientation of predator-prey spatial correlations is crucial in foraging
ecology. Growing evidence suggests that predator-prey interactions are
more constrained by functional characteristics of both the predator and
the prey. Unfortunately, in marine pelagic systems, the scale and
orientation of spatial correlations between predators and prey have been
only little explored from a functional point of view. We tested the
existence of fine-scale association between predators and fish
functional groups. Visual predator sightings and acoustic fish records
were collected synchronously during oceanographic surveys from 2004 to
2014. Prey biomass was integrated by nautical miles and split into four
size classes (<10 cm; 10-20 cm; 20-30 cm; >30 cm) and two depth layers
(surface, deep). We computed the relative biomass by prey size and depth
category from 0 to 12 nm around predator sightings to determine the
predators' proximity to local prey biomass. Two cetaceans (common,
bottlenose dolphins) and three seabirds (northern gannets, auks,
northern fulmars) were studied. No association was found in fulmars,
indicating they probably do not feed on considered fishes in the area.
Gannets and auks were positively correlated with local prey biomass for
sizes <20 cm at both depth layers. Significant negative relationships
were found between common dolphins and prey size classes <20 cm at both
depth layers, and between bottlenose dolphins and all size ranges at the
deeper layer. Our results suggest that the fine-scale spatial overlap of
predator and prey is influenced by their functional traits, and that
prey exhibit predator avoidance behaviour in presence of swimming
predators but not of flying ones.

For any questions or pdf requests,
please feel free to email me !

Best regards,

Charlotte Lambert

PELAGIS, UMS 3462 Universite de la Rochelle - CNRS 
La Rochelle, France 
mail: charlotte.lambert at univ-lr.fr 
profile: ResearchGate [2]


[1] https://doi.org/10.1093/icesjms/fsy143
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.uvic.ca/pipermail/marmam/attachments/20181107/8dde8690/attachment.html>

More information about the MARMAM mailing list