Foraging flight distances of wintering ducks and geese: a review
The distance covered by foraging animals, especially those that radiate from a central area when foraging, may affect ecosystem, community, and population dynamics, and has conservation and landscape planning implications for multiple taxa, including migratory waterfowl. Migrating and wintering wate...
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Published in | Avian conservation and ecology Vol. 9; no. 2; p. 1 |
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Main Authors | , , |
Format | Journal Article |
Language | English French |
Published |
Resilience Alliance
2014
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Subjects | |
Online Access | Get full text |
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Summary: | The distance covered by foraging animals, especially those that radiate from a central area when foraging, may affect ecosystem, community, and population dynamics, and has conservation and landscape planning implications for multiple taxa, including migratory waterfowl. Migrating and wintering waterfowl make regular foraging flights between roosting and feeding areas that can greatly impact energetic resources within the foraging zone near roost sites. We reviewed published studies and gray literature for one-way foraging flight distances (FFDs) of migrating and wintering dabbling ducks and geese. Thirty reviewed studies reported FFDs and several reported values for multiple species or locations. We obtained FFD values for migration (n = 7) and winter (n = 70). We evaluated the effects of body mass, guild, i.e., dabbling duck or goose, and location, i.e., Nearctic or Palearctic, on FFDs. We used the second-order Akaike's Information Criterion for model selection. We found support for effects of location and guild on FFDs. FFDs of waterfowl wintering in the Nearctic (7.4 + or - 6.7 km, mean + or - SD; n = 39 values) were longer than in the Palearctic (4.2 + or - 3.2 km; n = 31 values). The FFDs of geese (7.8 + or - 7.2 km, mean + or - SD; n = 24 values) were longer than FFDs of dabbling ducks (5.1 + or - 4.4 km, mean + or - SD; n = 46 values). We found mixed evidence that distance flown from the roost changed, i.e., increased or decreased, seasonally. Our results can be used to refine estimates of energetic carrying capacity around roosts and in biological and landscape planning efforts.Original Abstract: La distance parcourue par les animaux aux fins de recherche alimentaire, particulierement chez ceux qui rayonnent a partir d'un point central, peut influencer l'ecosysteme, la biocenose, ainsi que les dynamiques de population. Pour beaucoup de taxons incluant les anatides migrants, la distance parcourue a egalement des implications sur la conservation et la planification des paysages. Les vols reguliers des anatides (migrants ou hivernants) entre l'espace de nourrissage et de repos, peuvent impacter lourdement les ressources energetiques au sein de la zone de nourrissage proche des sites de repos. Nous avons examine les etudes et la litterature grise concernant les distances des alles vers les sites de nourrissage (DASN) des barboteurs et des oies migrants et hivernants. Trente etudes examinees ont indique les DASN dont un certain nombre ont mentionne des valeurs pour plusieurs especes ou lieux. Nous avons obtenu des valeurs de DASN pour la migration (n=7) et pour l'hiver (n=70). Nous avons evalue les effets de la masse corporelle, guilde, i.e., barboteur ou oie, et lieu, i.e., Nearctique ou Palearctique, sur les DASN. Nous avons utilise comme modele de selection le Critere d'Information d'Akaike de second ordre. Nous avons trouve des effets de lieu et guilde sur les DASN. Les DASN des anatides hivernant dans le Nearctique (7.4 + or - 6.7km, moyenne + or - ET; n = 39 valeurs) etaient plus longues que dans le Palearctique (4.2 + or - 3.2 km; n = 31 valeurs). Les DASN des oies (7.8 + or - 7.2 km, moyenne + or - ET; n = 24 valeurs) etaient plus longues que les DASN des barboteurs (5.1 + or - 4.4 km, moyenne + or - ET; n = 46 valeurs). Nous avons constate que les distances parcourues a partir des sites de repos varient, i.e., augmentent ou se reduisent en fonction de la saison. Nos resultats peuvent etre utilises pour ameliorer les estimations des capacites de charges energetiques autour des zones de repos et dans les efforts de planifications biologiques et paysages. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1712-6568 1712-6568 |
DOI: | 10.5751/ACE-00683-090202 |