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Author |
Benhamou S. |
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Title |
How to reliably estimate the tortuosity of an animal's path: straightness, sinuosity, or fractal dimension ? |
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Journal Article |
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Year |
2004 |
Publication |
Journal of theoretical biology |
Abbreviated Journal  |
J. Theor. Biol. |
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Volume |
229 |
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Pages |
209-220 |
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354;421 |
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Bachelor's thesis |
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0022-5193 |
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yes |
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3479 |
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Author |
Pontier Dominique, Fouchet David, Bried Jol, |
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Title |
Can cat predation help competitors coexist in seabird communities?
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Type |
Journal Article |
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Year |
2010 |
Publication |
Journal of Theoretical Biology |
Abbreviated Journal |
J. Theor. Biol. |
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Volume |
262 |
Issue |
1 |
Pages |
90 -96 |
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Keywords |
Oceanic islands, Seabirds, Feral cats, Nest site availability, Date of arrival, Community structure, Predator-prey relationships, Model, |
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Abstract |
On oceanic islands, nest site availability can be an important factor regulating seabird population dynamics. The potential for birds to secure a nest to reproduce can be an important component of their life histories. The dates at which different seabird species arrive at colonies to breed will have important consequences for their relative chances of success. Early arrival on the island allows birds to obtain nests more easily and have higher reproductive success. However, the presence of an introduced predator may reverse this situation. For instance, in the sub-Antarctic Kerguelen archipelago, early arriving birds suffer heavy predation from introduced cats. Cats progressively switch from seabirds to rabbits, since the local rabbit population starts to peak after early arriving seabird species have already returned to the colony. When late-arriving birds arrive, cat predation pressure on seabirds is thus weaker. In this paper, we investigate the assumption that the advantage of early nest mnopolization conferred to early arriving birds may be counterbalanced by the cost resulting from predation. We develop a mathematical model representing a simplified situation in which two insular seabird species differ only in their arrival date at the colony site and compete for nesting sites. We conclude that predation may ensure the coexistence of the two bird species or favor the late-arriving species, but only when seasonal variations in predation pressure are large. Interestingly, we conclude that arriving early is only favorable until a given level where high reproductive success no longer compensates for the long exposure to strong predation pressure. Our work suggests that predation can help to maintain the balance between species of different phenologies. |
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279 |
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0022-5193 |
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yes |
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Serial |
141 |
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Author |
Angelier J., Bergerat F., Bellou M. & Homberg C. |
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Type |
Journal Article |
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Year |
2004 |
Publication |
Journal of structural biology |
Abbreviated Journal |
J. Struct. Biol. |
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Volume |
26 |
Issue |
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Pages |
709-724 |
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316 |
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1047-8477 |
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yes |
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2553 |
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Author |
Delille D. & Razouls S. |
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Title |
Community structures of heterotrophic bacteria of copepod fecal pellets. |
Type |
Journal Article |
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Year |
1994 |
Publication |
Journal of plankton research |
Abbreviated Journal |
J. Plankton Res. |
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Volume |
16 |
Issue |
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Pages |
603 |
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193 |
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0142-7873 |
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yes |
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430 |
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Author |
Delille D., Marty G., Cansemi Soullard M. & Frankignoulle M. |
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Title |
Influence of subantarctic Macrocystis bed metabolism in diel changes of marine bacterioplankton and CO2 fluxes. |
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Journal Article |
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Year |
1997 |
Publication |
Journal of plankton research |
Abbreviated Journal |
J. Plankton Res. |
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Volume |
19 |
Issue |
9 |
Pages |
1251-1264 |
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193 |
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0142-7873 |
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Approved |
yes |
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Call Number |
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Serial |
1431 |
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Author |
Bocher P., Cherel Y., Alonzo F., Razouls S., Labat J.P., Mayzaud P. & Jouventin P. |
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Title |
Importance of the large copepod Paraeuchaeta antarctica (Giesbrecht, 1902) in coastal waters and the diet of seabirds at Kerguelen, Southern Ocean. |
Type |
Journal Article |
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Year |
2002 |
Publication |
Journal of plankton research |
Abbreviated Journal |
J. Plankton Res. |
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Volume |
24 |
Issue |
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Pages |
1317-1333 |
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109;166 |
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0142-7873 |
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yes |
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Serial |
2172 |
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Author |
Dumonteil E., Barre H. & Meissner G. |
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Book Chapter |
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Year |
1994 |
Publication |
Journal of physiology-Paris |
Abbreviated Journal |
J. Physiol. Paris |
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Volume |
479 |
Issue |
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Pages |
29-39 |
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Programme |
131 |
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Bachelor's thesis |
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ISSN |
0928-4257 |
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yes |
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523 |
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Author |
Talbot, D.A.; Duchamp, C.; Rey, B.; Hanuise, N.; Rouanet, J.L.; Sibille, B.; Brand, M.D. |
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Title |
Uncoupling protein and ATP/ADP carrier increase mitochondrial proton conductance after cold adaptation of king penguins |
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Journal Article |
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Year |
2004 |
Publication |
Journal of physiology-london |
Abbreviated Journal |
J. Physiol. (Lond.) |
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Volume |
558 |
Issue |
1 |
Pages |
123-135 |
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Abstract |
Juvenile king penguins develop adaptive thermogenesis after repeated immersion in cold water. However, the mechanisms of such metabolic adaptation in birds are unknown, as they lack brown adipose tissue and uncoupling protein-1 (UCP1), which mediate adaptive non-shivering thermogenesis in mammals. We used three different groups of juvenile king penguins to investigate the mitochondrial basis of avian adaptive thermogenesis . Skeletal muscle mitochondria isolated from penguins that had never been immersed in cold water showed no superoxide-stimulated proton conductance, indicating no functional avian UCP. Skeletal muscle mitochondria from penguins that had been either experimentally immersed or naturally adapted to cold water did possess functional avian UCP, demonstrated by a superoxide-stimulated, GDP-inhibitable proton conductance across their inner membrane. This was associated with a markedly greater abundance of avian UCP mRNA. In the presence (but not the absence) of fatty acids, these mitochondria also showed a greater adenine nucleotide translocase-catalysed proton conductance than those from never-immersed penguins. This was due to an increase in the amount of adenine nucleotide translocase. Therefore, adaptive thermogenesis in juvenile king penguins is linked to two separate mechanisms of uncoupling of oxidative phosphorylation in skeletal muscle mitochondria: increased proton transport activity of avian UCP (dependent on superoxide and inhibited by GDP) and increased proton transport activity of the adenine nucleotide translocase (dependent on fatty acids and inhibited by carboxyatractylate). |
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131 |
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0022-3751 |
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Notes |
10.1113/jphysiol.2004.063768 |
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yes |
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Call Number |
IPEV @ Thierry.Lemaire @ |
Serial |
5614 |
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Author |
Pisanu B., Chapuis J.L. & Durette Desset M.C. |
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Title |
Helminths from introduced small mammals on Kerguelen, Crozet, and Amsterdam Islands (Southern Indian Ocean). |
Type |
Journal Article |
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Year |
2001 |
Publication |
Journal of parasitology |
Abbreviated Journal |
J. Parasitol. |
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Volume |
87 |
Issue |
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Pages |
1205-1208 |
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276 |
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ISSN |
0022-3395 |
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yes |
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453 |
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Author |
McCoy K.D. & Tirard C. |
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Title |
Reproductive strategies of the seabird tick Ixodes uriae (Acari: Ixodidae). |
Type |
Journal Article |
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Year |
2002 |
Publication |
Journal of parasitology |
Abbreviated Journal |
J. Parasitol. |
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Volume |
88 |
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Pages |
813-816 |
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333 |
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0022-3395 |
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yes |
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614 |
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