Charles-André Bost, Researcher
born in 1959
Telephone:+ 33 (0)5 49 09 96
and research interests
Ornithology, ecology, evolution of life-history traits, foraging strategies, dive, energetic, marine predators, climat changes
Study models: penguins, cormorants, petrels, barnacle goose
Foraging strategies of diving seabirds
For diving seabirds, the way of resources acquisition play a key role because of important constraints imposed by the marine environment. Our objectives are to study the feeding behaviour during at-sea foraging in relation with trophic al and physical characteristics of the prospected environment. This study is based on the use of various dataloggers measuring the depth and the duration of the divings, swim speed, acceleration and frequency of captures of preys.
One of its application is the
development of bio indicators indices of the availability of the marine
resources on which rely these predators.
Impacts of climatic variability on marine predators
This study is based
on interannual monitoring of the foraging performances of penguins with
telemetric instruments (Argos system, data acquisition system). During
foraging trip at sea, the sensors measure the temperature of water masses
and the depths prospected during dive. With in situ data
, we can reconstitute the fishing effort of this predators in 3D as well
as the profiles of temperature of prospected water masses. The use of diving
animals as, autonomous and efficient vector of oceanographic instruments
in order to collect hydrological data, allow us to study the impact of
changes of hydrological structure on
efforts of marine predators and resources distribution at a regional scale
(Kerguelen and Crozet areas) (collaboration with l’OdyC
Département Milieux et Peuplements Aquatiques).
Thereafter, it will be possible to propose scenarios concerning the influence
of the climate variations on the distribution of resources of Southern
Ocean (pelagic fish).
Relations between foraging strategies, plasticity of life-history traits and oceanographic conditions
The objective is to
study the relations between foraging strategies, plasticity of life-history
traits and oceanographic conditions on various populations of the same
species (penguins, cormorants, petrels). We study the
adaptative value of different variations observed, as well as the character,
inherited or phenotypic, of the variations observed
Wintering strategies of the Barnacle Goose on the western coast of France
I also partici pate to the study of the energetic strategy during wintering of the Barnacle Goose, an arctic goose whose significant population winter on the Charente coastal. This work undertaken with H. Fritz (CEBC-CNRS), study the modes of exploitation of wintering resources and the links between plasticity in foraging strategy and fitness.