Foraging patterns of common crossbills (Loxia curvirostra) on spruces (Picea spp.) in Scotland
نویسندگان
چکیده
منابع مشابه
The role of marker traits in the assortative mating within red crossbills, Loxia curvirostra complex.
We conducted mate choice experiments to determine whether differences in calls or bill morphology might influence assortative mating between call types of red crossbills (Loxia curvirostra complex) that have diverged in bill structure to specialize on different species of conifers. Females preferred males that gave calls that matched their own type, but did not prefer males that more closely ap...
متن کاملSocial experience modifies behavioural responsiveness to a preferred vocal signal in red crossbills, Loxia curvirostra
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متن کاملPatterns of genetic variation in the adaptive radiation of New World crossbills (Aves: Loxia).
Incipient species groups or young adaptive radiations such as crossbills (Aves: Loxia) present the opportunity to investigate directly the processes occurring during speciation. New World crossbills include white-winged crossbills (Loxia leucoptera), Hispaniolan crossbills (Loxia megaplaga), and red crossbills (Loxia curvirostra complex), the last of which is comprised of at least nine morpholo...
متن کاملCan selection by an ectoparasite drive a population of red crossbills from its adaptive peak?
The bill structures of different call types of red crossbills (Loxia curvirostra complex) in western North America usually approximate the predicted optima for foraging on single species of conifers. One clear exception is the call type in the South Hills, Idaho, that is coevolving in an evolutionary arms race with Rocky Mountain lodgepole pine (Pinus contorta ssp. latifolia). Although South Hi...
متن کاملPhotoperiod but not food restriction modulates innate immunity in an opportunistic breeder, Loxia curvirostra.
An organism's investment in immune function often varies seasonally but understanding of how fluctuations in environmental conditions directly modulate investment remains limited. This experiment investigated how changes in photoperiod and food availability affect investment in constitutive innate immunity and the acute phase response induced by lipopolysaccharide (LPS) injections in captive re...
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ژورنال
عنوان ژورنال: Forestry: An International Journal of Forest Research
سال: 2018
ISSN: 0015-752X,1464-3626
DOI: 10.1093/forestry/cpy002