Search results for "Natal homing"

showing 3 items of 3 documents

Seabirds mated for life migrate separately to the same places: behavioural coordination or shared proximate causes?

2015

Long-term pair bonds occur in diverse animal taxa, but they are most common in birds, and can last from a few years to a lifetime. In many of these species, after the reproductive season, birds migrate to distant nonbreeding grounds where they remain for several months, and until recently, little was known about whether partners maintain contact during migration. This gap in knowledge was primarily due to past methodological difficulties in tracking long-term, large-scale movements of individuals. However, the development of new animal-borne geolocation devices has enabled researchers to track movements of individuals for a year or more. We tracked the annual migrations of both members of b…

Global location sensorGLS loggerCalonectris diomedeapartner coordinationbiologyEcologyBehavioural strategycarryover effectinbreedingbehavioural strategy; carryover effects; global location sensor; GLS logger; inbreeding; mate fidelity; movement ecology; partner coordinationbiology.organism_classificationReproductive seasonEcology Evolution Behavior and SystematicBehavioural strategy; Carryover effects; Global location sensor; GLS logger; Inbreeding; Mate fidelity; Movement ecology; Partner coordination; Ecology Evolution Behavior and Systematics; Animal Science and ZoologyMovement ecologyGeolocationSettore AGR/11 - Entomologia Generale E ApplicataGeographyNatal homingMate fidelityAnimal Science and ZoologyInbreedingEcology Evolution Behavior and Systematics
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EVIDENCE FOR KIN-STRUCTURED GROUP FOUNDING AND LIMITED JUVENILE DISPERSAL IN THE SUB-SOCIAL SPIDER STEGODYPHUS LINEATUS (ARANEAE, ERESIDAE)

2001

Abstract In sub-social spiders, restricted dispersal of young (i.e., natal philopatry) and the potential for inbreeding could contribute to within-population subdivision, thus resulting in a population structure similar to that found in social congeners. In this context, we analyzed the origin and mode of individual distribution patterns and their contribution to within-population structure in juveniles of the sub-social spider Stegodyphus lineatus. We investigated the distribution of juveniles for four months after leaving the maternal nest using allozyme genetic markers. We found that isolated groups of juveniles consisted predominantly of siblings, whereas larger aggregations of individu…

Spidereducation.field_of_studyEcologyPopulationContext (language use)Biologybiology.organism_classificationNatal homingInsect ScienceStegodyphus lineatusBiological dispersalJuvenileeducationSocial spiderJournal of Arachnology
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Stepping stones of life: natal dispersal in the group-living but noncooperative speckled warbler

2003

In most cooperatively breeding birds the offspring of one sex, usually male, delays dispersal to remain on the natal territory and helps its parents to rear subsequent young. Thus delayed dispersal could be the first step in the evolution of cooperative breeding. We studied natal dispersal in a population of the group-living speckled warbler, Chthonicola sagittata, based on observations of a colour-banded population over 3 years. Unlike other group-living members of the Acanthizinae, all juvenile males in this population dispersed to settle on foreign territories as subordinates, which do not help rear the young. Speckled warblers showed all the life history traits that are thought to resul…

education.field_of_studyPopulationBiologybiology.organism_classificationLife history theoryNatal homingCooperative breedingBiological dispersalAnimal Science and ZoologyPhilopatryeducationEcology Evolution Behavior and SystematicsSex ratioDemographySpeckled warblerAnimal Behaviour
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