Results 21 to 30 of about 45,506 (292)

Expression and phylogenetic analyses reveal paralogous lineages of putatively classical and non-classical MHC-I genes in three sparrow species (Passer)

open access: yesBMC Evolutionary Biology, 2017
Background The Major Histocompatibility Complex (MHC) plays a central role in immunity and has been given considerable attention by evolutionary ecologists due to its associations with fitness-related traits.
Anna Drews   +3 more
doaj   +1 more source

Sparrow Preferences for Winter Cover Crops in California's Central Coast

open access: yesFrontiers in Sustainable Food Systems, 2020
Agriculture in many regions of the world has reduced bird habitat and abundance, and altered avian community structure. A study was conducted on an organic research farm over two winters (Oct to Mar) in an intensive agricultural region of Salinas Valley,
Eric B. Brennan
doaj   +1 more source

Avian Malaria Among House Sparrows: a Survey of Disease and Mosquito Vectors (Diptera: Culicidae) in Reed City, Michigan [PDF]

open access: yes, 2017
Nine of 350 house sparrows caught in Reed City, Michigan, had malaria parasites detectable on Giemsa-stained thin films. All of the infected birds were juveniles, Parasitemias were too low to permit identification of the Plasmodium present. Collection of
Freier, Jerome E, Gogolin, Luanne R
core   +3 more sources

The Consequences of Polyandry for Sibship Structures, Distributions of Relationships and Relatedness, and Potential for Inbreeding in a Wild Population [PDF]

open access: yes, 2017
We thank the Tsawout and Tseycum First Nations for access to Mandarte Island, Pirmin Nietlisbach, Lukas Keller, Greta Bocedi, Brad Duthie, and Matthew Wolak for helpful discussions, and the European Research Council, National Sciences and Engineering ...
Arcese, Peter   +2 more
core   +2 more sources

The role of a synanthropic bird in the nest niche expansion of a secondary cavity nester to man‐made structures

open access: yesEcology and Evolution, 2022
Species with similar ecological characters often compete with each other; however, a species may also facilitate the survival or reproduction of another ecologically similar species, although such interaction is rarely documented in birds.
Jing‐Chia Guo   +5 more
doaj   +1 more source

Increased initial task difficulty drives social foragers to develop sub-optimal conformity instead of adaptive diversity

open access: yesRoyal Society Open Science, 2023
The extent to which animal societies exhibit social conformity as opposed to behavioural diversity is commonly attributed to adaptive learning strategies. Less attention is given to the possibility that the relative difficulty of learning a task socially
Đorđe Marković   +3 more
doaj   +1 more source

Fine-scale population structure and asymmetrical dispersal in an obligate salt-marsh passerine, the Saltmarsh Sparrow (Ammodramus Caudacutus) [PDF]

open access: yes, 2012
Understanding the spatial scale of gene flow can yield valuable insight into the ecology of an organism and guide conservation strategies. Fine-scale genetic structure is uncommon in migratory passerines because of their high vagility and presumed high ...
Babbitt, Kimberly J.   +3 more
core   +2 more sources

Characterization of mercury and its risk in Nelson's, Saltmarsh, and Seaside Sparrows. [PDF]

open access: yesPLoS ONE, 2012
BACKGROUND: Nelson's, Saltmarsh, and Seaside Sparrows (Ammodramus nelsoni, A. caudacutus, and A. maritimus, respectively) depend on marsh and wetland habitats--ecosystems in which mercury (Hg) bioavailability is notoriously high.
Virginia L Winder
doaj   +1 more source

Supplementary feeding increases nestling feather corticosterone early in the breeding season in house sparrows [PDF]

open access: yes, 2017
Several studies on birds have proposed that a lack of invertebrate prey in urbanized areas could be the main cause for generally lower levels of breeding success compared to rural habitats.
De Neve, Liesbeth   +6 more
core   +1 more source

Differential introgression and the maintenance of species boundaries in an advanced generation avian hybrid zone [PDF]

open access: yes, 2016
Background: Evolutionary processes, including selection and differential fitness, shape the introgression of genetic material across a hybrid zone, resulting in the exchange of some genes but not others.
Kovach, Adrienne I.   +3 more
core   +4 more sources

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