Mesopredator release effect on long-live prey

Russell James C., Lecomte Vincent, Dumont Yves, Le Corre Matthieu. 2010. Mesopredator release effect on long-live prey. In : 1st World Seabird Conference, Victoria, Canada, September 7-10, 2010. Pacific Seabird Group. s.l. : s.n., 1 p. World Seabird Conference. 1, Victoria, Canada, 7 Septembre 2010/10 Septembre 2010.

Résumé : "Mesopredator release effect" has been hypothesised as a possible indirect effect from eradications, where superpredator (e.g. 'cat') removal can generate a mesopredator (e.g. 'rat') increase which may increase the impact on their shared prey (e.g. 'birds'). Using more biologically realistic models for seabirds and introduced mammalian predators we show that mesopredator release only occurs in strongly top-down moderated (resource-abundant) systems. Even when mesopredator release can occur, the negative impact of more mesopredators is outweighed by the benefit of superpredator removal, allowing recovery of the prey population. The consideration of age-structured prey contradicts previous theoretical results for mesopredator release effect. Only superpredator eradication (not control) allows the population recovery of long-lived insular species.

Classification Agris : L20 - Écologie animale

Auteurs et affiliations

• Russell James C., Université de la Réunion (REU)
• Lecomte Vincent, Université de la Réunion (REU)
• Dumont Yves, CIRAD-BIOS-UMR AMAP (FRA) ORCID: 0000-0003-4817-685X
• Le Corre Matthieu, Université de la Réunion (REU)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/560645/)

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