Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird

Autor: Jeroen Onrust, Jan A. van Gils, Bernard Spaans, Jimmy de Fouw, Tamar Lok, Theunis Piersma, Maarten Brugge, Anne Dekinga, Tjisse van der Heide, Piet J. van den Hout, Matthijs van der Geest, Jutta Leyrer, Thomas Oudman
Přispěvatelé: Arctic and Antarctic studies, Piersma group, Olff group
Jazyk: angličtina
Rok vydání: 2013
Předmět:
0106 biological sciences
Survival rate
predator-prey interactions
Population Dynamics
01 natural sciences
Population density
Choice Behavior
Predation
Charadriiformes
Hydrogen sulphide
Toxins
Research Articles
EDUCATED PREDATORS
General Environmental Science
Trophic level
education.field_of_study
biology
Ecology
Population size
MARKED ANIMALS
Mauritania
toxins
General Medicine
CHEMICAL DEFENSE
APOSEMATIC PREY
WARNING SIGNALS
General Agricultural and Biological Sciences
diet choice
hydrogen sulphide
BANC-DARGUIN
survival rate
Population
Diet choice
Optimal foraging theory
Predator-prey interactions
STRATEGIC DECISIONS
010603 evolutionary biology
Models
Biological
General Biochemistry
Genetics and Molecular Biology
AFFECTS FORAGING DECISIONS
Animals
14. Life underwater
education
optimal foraging theory
Toxins
Biological
Population Density
General Immunology and Microbiology
010604 marine biology & hydrobiology
predator–prey interactions
Aquatic Ecology
Feeding Behavior
RED KNOTS
biology.organism_classification
Bivalvia
KNOTS CALIDRIS-CANUTUS
Predatory Behavior
Molluscivore
Zdroj: Proceedings of the Royal Society B: Biological Sciences, 280(1763)
Proceedings of the Royal Society B: Biological Sciences 280 (2013) 1763
Proceedings of the Royal Society B-Biological Sciences, 280, 1-10
Proceedings of the Royal Society of London. Series B, Biological Sciences, 280(1763):20130861. ROYAL SOC
Proceedings of the Royal Society B-Biological Sciences, 280, 1763, pp. 1-10
%2C+%3Cb%3E%3Ci%3Ein%3C%2Fi%3E%3C%2Fb%3E%3A+Oudman%2C+T.+%3Ci%3ERed+knot+habits+%3A+An+optimal+foraging+perspective+on+intertidal+life+at+Banc+d%E2%80%99Arguin%2C+Mauritania.%3C%2Fi%3E+pp.+32-53
Proceedings of the Royal Society B: Biological Sciences
ISSN: 1471-2954
0962-8452
DOI: 10.1098/rspb.2013.0861
Popis: Recent insights suggest that predators should include (mildly) toxic prey when non-toxic food is scarce. However, the assumption that toxic prey is energetically as profitable as non-toxic prey misses the possibility that non-toxic prey have other ways to avoid being eaten, such as the formation of an indigestible armature. In that case, predators face a trade-off between avoiding toxins and minimizing indigestible ballast intake. Here, we report on the trophic interactions between a shorebird (red knot, Calidris canutus canutus ) and its two main bivalve prey, one being mildly toxic but easily digestible, and the other being non-toxic but harder to digest. A novel toxin-based optimal diet model is developed and tested against an existing one that ignores toxin constraints on the basis of data on prey abundance, diet choice, local survival and numbers of red knots at Banc d'Arguin (Mauritania) over 8 years. Observed diet and annual survival rates closely fit the predictions of the toxin-based model, with survival and population size being highest in years when the non-toxic prey is abundant. In the 6 of 8 years when the non-toxic prey is not abundant enough to satisfy the energy requirements, red knots must rely on the toxic alternative.
Databáze: OpenAIRE
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