Habitat selection and foraging ecology of seabirds in the Gulf of St. Lawrence
| Autor: | Guse, Nils |
|---|---|
| Přispěvatelé: | Garthe, Stefan, Bork, Hans-Rudolf |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
diving
seabird Abschlussarbeit Gulf of St. Lawrence Northern Gannet habitat selection multi-species feeding association Northwest Atlantic Faculty of Mathematics and Natural Sciences at-sea number data logger water mass spatial constraint doctoral thesis primary productivity ddc:590 Atlantic Mackerel cetacean distribution ddc:5XX foraging ecology hotspot Mathematisch-Naturwissenschaftliche Fakultät seabird habitat selection Gulf of St. Lawrence foraging ecology Northern Gannet cetacean multi-species feeding association distribution water mass primary productivity at-sea number diving data logger Atlantic Mackerel spatial constraint Northwest Atlantic hotspot |
| Popis: | The study focuses on at-sea distribution, habitat selection and foraging ecology of seabirds in a seabird hotspot, the Gulf of St. Lawrence. Analyses are based on standardized ship-based surveys with oceanographic sampling, and equipment of breeding birds with data loggers. The Northern Gannet as focal species was most abundant. At-sea totals for the Southern Gulf proved regional and international importance for several species. New insights into links between seabirds and at-sea habitats were gained using generalized additive models (GAMs). Colony location as spatial constraint showed strong influence on breeding species. Water mass indicators were important predictors of seabird distribution. Northern Gannets were highly associated with cetaceans which had a strong influence on foraging behavior and general distribution of Gannets. Breeding Gannets from Bonaventure feeding on Atlantic Mackerel showed short, high speed and shallow V-shaped dives in response to this type of prey. |
| Databáze: | OpenAIRE |
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