Female pied flycatchers sharing the same nestbox
نویسندگان
چکیده
منابع مشابه
Experimentally activated immune defence in female pied flycatchers results in reduced breeding success.
Traditional explanations for the negative fitness consequences of parasitism have focused on the direct pathogenic effects of infectious agents. However, because of the high selection pressure by the parasites, immune defences are likely to be costly and trade off with other fitness-related traits, such as reproductive effort. In a field experiment, we immunized breeding female flycatchers with...
متن کاملFemale Hematozoan Infection Reduces Hatching Success but not Fledging Success in Pied Flycatchers Ficedula hypoleuca
—We report association between female blood parasite prevalence (percentage of infected birds) just after egg laying and reproductive success in two successive breeding seasons, in a breeding population of Pied Flycatcher Ficedula hypoleuca in central Spain. Females infected with Trypanosoma spp. had a higher probability of deserting their clutches during the incubation period than noninfected ...
متن کاملGender and viability selection on morphology in fledgling pied flycatchers.
Until recently, analyses of gender-dependent differences in viability selection and the ontogeny of sexual size dimorphism have been plagued by difficulties in determining the sex of nestling birds on the basis of morphology. Recently, this problem was overcome using molecular sex identification to report for the first time body-size-mediated antagonistic selection on the viability of male and ...
متن کاملAlternate non-stop migration strategies of pied flycatchers to cross the Sahara desert.
Each year more than two billion songbirds cross the Sahara, but how they perform this formidable task is largely unknown. Using geolocation tracks from 27 pied flycatchers, a nocturnally migrating passerine, we show that most birds made diurnal flights in both autumn and spring. These diurnal flights were estimated to be part of non-stop flights of mostly 40-60 h. In spring, birds flew across t...
متن کاملSex-Specific Associations Between Nest Defence, Exploration and Breathing Rate in Breeding Pied Flycatchers
Correlations between behavioural traits constrain animals to a limited range of behavioural choices and set a limit to the available variation in behavioural phenotype of a population. These constraints are especially important during stressful situations, potentially limiting the ability to cope with stress appropriately. As yet, very little consideration has been given to a possible role for ...
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ژورنال
عنوان ژورنال: Ringing & Migration
سال: 1990
ISSN: 0307-8698,2159-8355
DOI: 10.1080/03078698.1990.9673959