Results 31 to 40 of about 13,442 (233)

An Experimental Test of Defenses Against Avian Brood Parasitism in a Recent Host

open access: yesFrontiers in Ecology and Evolution, 2021
Theoretical studies predict that hosts of avian brood parasites should evolve defenses against parasitism in a matter of decades. However, opportunities to test these predictions are limited because brood parasites rarely switch to naïve hosts.
Virginia E. Abernathy   +2 more
doaj   +1 more source

Assessing the Consequences of Brood Parasitism and Nest Predation On Seasonal Fecundity in Passerine Birds [PDF]

open access: yes, 1995
Brood parasites and nest predators reduce the seasonal fecundity and, hence, the population growth rates of their victims. However, most field studies do not measure directly how parasites and predators decrease seasonal fecundity, but instead measure ...
Grzybowski, Joseph A., Pease, Craig M.
core   +1 more source

The neuroethology of avian brood parasitism [PDF]

open access: yesJournal of Experimental Biology, 2021
ABSTRACTObligate brood-parasitic birds never build nests, incubate eggs or supply nestlings with food or protection. Instead, they leave their eggs in nests of other species and rely on host parents to raise their offspring, which allows the parasite to continue reproducing throughout the breeding season. Although this may be a clever fitness strategy,
openaire   +2 more sources

Reproductive Strategies Change With Time in a Newly Founded Colony of Spotless Starlings (Sturnus unicolor)

open access: yesFrontiers in Ecology and Evolution, 2021
Variation in avian reproductive strategies is often studied from a comparative perspective, since even closely-related taxa differ greatly in the degree of polygyny, extra-pair paternity (EPP) or intra-specific brood-parasitism.
Patricia Celis   +2 more
doaj   +1 more source

Host species determines egg size in Oriental cuckoo [PDF]

open access: yes, 2018
© 2018 The Zoological Society of London.The Oriental cuckoo Cuculus optatus is an obligate brood parasite associated with species of the genus Phylloscopus.
Bachurin   +54 more
core   +2 more sources

Getting more than a fair share: nutrition of worker larvae related to social parasitism in the Cape honey bee Apis mellifera capensis [PDF]

open access: yes, 2002
Besides activation of ovaries and thelytokous reproduction of Cape workers, larval nutrition is an important aspect in parasitism of the African honey bee.
Allsopp, M.H.   +3 more
core   +2 more sources

Clutch Abandoning Parasitised Yellow Warblers Have Increased Circulating Corticosterone With No Effect of Past Corticosterone or Differences in Egg Maculation Characteristics

open access: yesFrontiers in Ecology and Evolution, 2022
Parental care can be costly to parents’ fitness. As such, abandonment of the current reproductive attempt may benefit potential future opportunities, maximising lifetime reproductive success.
Antoine V. Turcotte-van de Rydt   +6 more
doaj   +1 more source

The impact of a vertically transmitted microsporidian, Nosema granulosis on the fitness of its Gammarus duebeni host under stressful environmental conditions [PDF]

open access: yes, 2003
Although purely vertically transmitted parasites are predicted to cause low pathogenicity in their hosts, the effects of such parasites on host fitness under stressful environmental conditions have not previously been assessed.
Dunn, A.M., Hatcher, M.J., Kelly, A.
core   +1 more source

A comparative study of the function of heterospecific vocal mimicry in European passerines [PDF]

open access: yes, 2007
Although heterospecific vocal imitation is well documented in passerines, the evolutionary correlates of this phenomenon are poorly known. Here, we studied interspecific variation in vocal mimicry in a comparative study of 241 European songbirds.
Anders Pape Møller   +72 more
core   +1 more source

Russet Sparrows spot alien chicks from their nests

open access: yesAvian Research, 2018
Background In coevolutionary interactions between brood parasites and their hosts, host parents are under strong selection to evolve defenses against parasitism.
Juan Huo   +4 more
doaj   +1 more source

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