Territoriality, Prospecting, and Dispersal in Cooperatively Breeding Micronesian Kingfishers (Todiramphus Cinnamominus Reichenbachii)

Kesler, Dylan C.; Haig, Susan M.

doi:10.1642/0004-8038(2007)124[381:tpadic]2.0.co;2

Cited by 22 publications

(3 citation statements)

References 68 publications

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“…We located radiotagged birds throughout daylight hours (between 0500 and 1800 hour.s) because previous investigations of a congener found that nocturnal movements were unlikely (Kesler and Haig 2007c). Birds were located approximately twice daily, with consecutive sampling separated by >2 h to avoid serial correlation (Kesler and Haig 2007b).…”

Section: Home-range-scale Resource Selectionmentioning

confidence: 99%

Agricultural Coconut Forest as Habitat for the Critically Endangered Tuamotu Kingfisher (Todiramphus Gambieri Gertrudae)

Coulombe

Kesler²,

Gouni

2011

The Auk

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The effects of anthropogenic habitat modification are evident on tropical Pacific islands where forests have been extensively converted to plantations of Coconut Palm {Cocos nucífera). We evaluated resource selection in the critically endangered Tuamotu Kingfisher {Todiramphus gambieri gertrudae), which is confined to a single population on the low-elevation island of Niau Atoll in French Polynesia. Our analyses indicate that resources associated with foraging underlie space use and habitat selection of Tuamotu Kingfishers at multiple spatial scales. At the island scale, the occurrence of the species was best predicted by habitat features associated with foraging opportunities, including agricultural coconut forest with open understory, hunting perches, and exposed ground. Conversely, the species' distribution was negatively associated with undisturbed vegetation, including primary feo forest and fallow coconut plantation. At the home-range scale, utilization distributions of radiomarked Tuamotu Kingfishers also indicated that birds selected agricultural coconut forest and least preferred native feo forest. Observations further indicated that foraging birds selected coconut plantations managed with prescribed burning for hunting. The Tuamotu Kingfisher is a rare example of a threatened tropical species that likely benefits from agricultural management, and our findings provide support for conservation strategies based on establishing rescue populations on other islands with coconut plantations. We suggest that incorporating agricultural coconut forests into conservation planning could help prevent the extinction of several kingfisher species that historically relied on the natural broadleaf habitats that are now almost entirely absent from insular Pacific Oceania. Les plantations de cocotiers comme habitat d'une espèce en danger critique d'extinction, Todiramphus gambieri gertrudaeRÉSUMÉ.-Les effets de la modification anthropique de l'habitat sont évidents sur les iles tropicales du Pacifique où les forêts ont été extensivement converties en plantations de Cocos nucifera. Nous avons évalué la sélection des ressources chez Todiramphus gambieri gertrudae, une espèce en danger critique d'extinction limitée à une seule population sur l'ile à basse altitude de Niau Atoll, en Polynésie française. Nos analyses indiquent que les ressources associées à la quête de nourriture sont à la base de l'utilisation de l'espace et de la sélection de l'habitat par cette espèce à plusieurs échelles spatiales. À l'échelle de l'ile, les caractéristiques de l'habitat associées à des opportunités d'alimentation, telles que les plantations de cocotiers avec un sous-étage ouvert, des perchoirs de chasse et un sol exposé, sont les facteurs qui permettent le mieux de prédire la présence de l'espèce. À l'inverse, la répartition de l'espèce était négativement associée à une végétation non perturbée, telle que les forêts primaires et les plantations de cocotiers en jachère. À l'échelle du domaine vital, la répartition des individus munis d'émet...

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Section: Home-range-scale Resource Selectionmentioning

confidence: 99%

Agricultural Coconut Forest as Habitat for the Critically Endangered Tuamotu Kingfisher (Todiramphus Gambieri Gertrudae)

Coulombe

Kesler²,

Gouni

2011

The Auk

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“…Indeed, individuals in several cooperative species have been described as frequently prospecting foreign groups (Bergmüller, Heg, Peer, & Taborsky, 2005;Doolan & Macdonald, 1996;Kesler & Haig, 2007). This may generate familiarity with members of potential target groups, reduce aggression and thereby enable eventual integration into the respective group's hierarchy.…”

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confidence: 99%

“…Other potential benefits of such between-group visits have also been proposed, e.g. extragroup matings (Young, Spong, & Clutton-Brock, 2007) or the establishment of safe havens (Bergmüller, Heg, Peer, et al, 2005), besides their potential importance for dispersal (Bergmüller, Heg, Peer, et al, 2005;Cox & Kesler, 2012;Delgado et al, 2014;Doolan & Macdonald, 1996;Kesler & Haig, 2007). Thus, in many cooperative species, individuals appear to build familiarity networks outside their own group by visiting and interacting with foreign groups.…”

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Prospecting precedes dispersal and increases survival chances in cooperatively breeding cichlids

2015

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Survival and population persistence in the critically endangered Tuamotu kingfisher

et al. 2012

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A wide range of threats affect populations of Pacific island birds and conservationists have been challenged to identify factors upon which to focus management. The Tuamotu kingfisher (Todiramphus gambieri) is one of the most endangered vertebrate species in the world, yet little has been published about basic biology or causes of the population decline. We used 4 years of mark-resight and territory resource information to model survival in juvenile and adult Tuamotu kingfishers. Annual survival of adult males (f ¼ 0.77) was similar to congeneric species, whereas survival of adult females (f ¼ 0.40) and juveniles (f ¼ 0.12) was much lower. The best-supported survival model indicated adult female survival was positively related to territory size, whereas adult male survival was negatively related to atoll forest within territories. We used parameter estimates from survival models in a life-stage simulation analysis to evaluate the relative influence of vital rates and territory habitats on population processes. Results indicated that adult female and juvenile survival had the greatest impact on Tuamotu kingfisher populations, accounting for 58% and 32% of variation in the finite rate of population increase, respectively. Nocturnal predation by rats (Rattus spp.) on incubating kingfishers may explain the lower survival of females than males, whereas juvenile birds may be especially vulnerable to predation by cats (Felis catus). Thus, conservation management for Tuamotu kingfishers should include use of metal guards on cavity trees to protect nests and incubating females, and control predator access during fledging periods. ß 2012 The Wildlife Society.

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Territoriality, Prospecting, and Dispersal in Cooperatively Breeding Micronesian Kingfishers (Todiramphus Cinnamominus Reichenbachii)

Cited by 22 publications

References 68 publications

Agricultural Coconut Forest as Habitat for the Critically Endangered Tuamotu Kingfisher (Todiramphus Gambieri Gertrudae)

Agricultural Coconut Forest as Habitat for the Critically Endangered Tuamotu Kingfisher (Todiramphus Gambieri Gertrudae)

Prospecting precedes dispersal and increases survival chances in cooperatively breeding cichlids

Survival and population persistence in the critically endangered Tuamotu kingfisher

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