دورية أكاديمية
Interspecific and intraspecific foraging differentiation of neighbouring tropical seabirds
| العنوان: | Interspecific and intraspecific foraging differentiation of neighbouring tropical seabirds |
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| المؤلفون: | Austin R. E., De Pascalis F., Votier S. C., Haakonsson J., Arnould J. P. Y., Ebanks-Petrie G., Newton J., Harvey J., Green J. A. |
| المساهمون: | R.E. Austin, F. De Pascali, S.C. Votier, J. Haakonsson, J.P.Y. Arnould, G. Ebanks-Petrie, J. Newton, J. Harvey, J.A. Green |
| بيانات النشر: | BioMed Central. Part of Springer Nature |
| سنة النشر: | 2021 |
| المجموعة: | The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
| مصطلحات موضوعية: | brown booby, competition, foraging ecology, red-footed booby, resource partitioning, Settore BIO/07 - Ecologia |
| الوصف: | Background: Social interactions, reproductive demands and intrinsic constraints all influence foraging decisions in animals. Understanding the relative importance of these factors in shaping the way that coexisting species within communities use and partition resources is central to knowledge of ecological and evolutionary processes. However, in marine environments, our understanding of the mechanisms that lead to and allow coexistence is limited, particularly in the tropics. Methods: Using simultaneous data from a suite of animal-borne data loggers (GPS, depth recorders, immersion and video), dietary samples and stable isotopes, we investigated interspecific and intraspecific differences in foraging of two closely-related seabird species (the red-footed booby and brown booby) from neighbouring colonies on the Cayman Islands in the Caribbean. Results: The two species employed notably different foraging strategies, with marked spatial segregation, but limited evidence of interspecific dietary partitioning. The larger-bodied brown booby foraged within neritic waters, with the smaller-bodied red-footed booby travelling further offshore. Almost no sex differences were detected in foraging behaviour of red-footed boobies, while male and female brown boobies differed in their habitat use, foraging characteristics and dietary contributions. We suggest that these behavioural differences may relate to size dimorphism and competition: In the small brown booby population (n < 200 individuals), larger females showed a higher propensity to remain in coastal waters where they experienced kleptoparasitic attacks from magnificent frigatebirds, while smaller males that were never kleptoparasitised travelled further offshore, presumably into habitats with lower kleptoparasitic pressure. In weakly dimorphic red-footed boobies, these differences are less pronounced. Instead, density-dependent pressures on their large population (n> 2000 individuals) and avoidance of kleptoparasitism may be more prevalent in driving movements ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/wos/WOS:000655111800001; volume:9; issue:1; firstpage:1; lastpage:16; numberofpages:16; journal:MOVEMENT ECOLOGY; https://hdl.handle.net/2434/913330Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85107191726 |
| DOI: | 10.1186/s40462-021-00251-z |
| الإتاحة: | https://doi.org/10.1186/s40462-021-00251-zTest https://hdl.handle.net/2434/913330Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.34039F70 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1186/s40462-021-00251-z |
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