Abstract:
:Seasonal changes in stress steroid hormone secretions are thought to reflect investment in self-maintenance versus reproduction. The capricious conditions hypothesis (CCH) posits that reduced corticosterone (CORT) secretion during stress coincident with parental phases of breeding is necessary in harsh environments because a full response would otherwise trigger repeated nest abandonments. To test this hypothesis, we measured seasonal changes in stress physiology in free-living red crossbills (Loxia curvirostra), an opportunistically breeding songbird that regularly breeds in summer and winter. This species allows unique comparisons of breeding physiology under very different seasonal environmental conditions within locations. We found strong support for the CCH: red crossbills showed reduced CORT secretion only when in high reproductive condition in the winter, when compared with summer breeders and winter non-breeders. These data demonstrate that behavioural status and local environmental conditions interact to affect mechanisms underlying investment trade-offs, presumably in a way that maximizes lifetime reproductive success.
journal_name
Biol Lettjournal_title
Biology lettersauthors
Cornelius JM,Breuner CW,Hahn TPdoi
10.1098/rsbl.2011.0865subject
Has Abstractpub_date
2012-04-23 00:00:00pages
312-5issue
2eissn
1744-9561issn
1744-957Xpii
rsbl.2011.0865journal_volume
8pub_type
杂志文章相关文献
Biology Letters文献大全abstract::Here, we use 30 long-term, high-resolution palaeoecological records from Mexico, Central and South America to address two hypotheses regarding possible drivers of resilience in tropical forests as measured in terms of recovery rates from previous disturbances. First, we hypothesize that faster recovery rates are assoc...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2020.0005
更新日期:2020-04-01 00:00:00
abstract::In group-living mammals, the eviction of subordinate females from breeding groups by dominants may serve to reduce feeding competition or to reduce breeding competition. Here, we combined both correlational and experimental approaches to investigate whether increases in food intake by dominant females reduces their te...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2016.0961
更新日期:2017-04-01 00:00:00
abstract::Hunter-gatherer Pygmies from Central Africa are described as being extremely mobile. Using neutral genetic markers and population genetics theory, we explored the dispersal behaviour of the Baka Pygmies from Cameroon, one of the largest Pygmy populations in Central Africa. We found a strong correlation between genetic...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2010.0192
更新日期:2010-12-23 00:00:00
abstract::Placoderms are a diverse group of armoured fishes that dominated the aquatic ecosystems of the Devonian Period, 415-360 million years ago. The bladed jaws of predators such as Dunkleosteus suggest that these animals were the first vertebrates to use rapid mouth opening and a powerful bite to capture and fragment evasi...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2006.0569
更新日期:2007-02-22 00:00:00
abstract::In many host populations, one of the most striking differences among hosts is their age. While parasite prevalence differences in relation to host age are well known, little is known on how host age impacts ecological and evolutionary dynamics of diseases. Using two clones of the water flea Daphnia magna and two clone...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0131
更新日期:2015-05-01 00:00:00
abstract::Plants have evolved numerous herbivore defences that are resistance- or tolerance-based. Resistance involves physical and chemical traits that deter and/or harm herbivores whereas tolerance minimizes fitness costs of herbivory, often via compensatory growth. The Poaceae frequently accumulate large amounts of silicon (...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2019.0361
更新日期:2019-07-26 00:00:00
abstract::Agricultural intensification is a leading cause of global biodiversity loss, especially for threatened and near-threatened species. One widely implemented response is 'wildlife-friendly farming', involving the close integration of conservation and extensive farming practices within agricultural landscapes. However, th...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2012.0367
更新日期:2012-10-23 00:00:00
abstract::Malpighian tubules play an essential role in excretion, osmoregulation and immunity of most insects. Exceptionally, aphids lack Malpighian tubules, providing the opportunity to investigate the fate of genes expressed in an organ that has undergone evolutionary reduction and loss. Making use of the sequenced genomes of...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0154
更新日期:2015-05-01 00:00:00
abstract::Coral-associated invertebrates are the most significant contributors to the diversity of reef ecosystems, but no studies have examined how larvae manage to settle and grow in their coral hosts. Video recordings were used to document this process in the coral barnacle Darwiniella angularis associated with the coral Cyp...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2016.0124
更新日期:2016-06-01 00:00:00
abstract::Information on migration patterns is critical to using no-take migratory corridors and marine reserves to protect the spawning stock of commercially exploited species. Both active and passive acoustic tracking methods quantified movement of commercially and ecologically important blue crabs in the White Oak River estu...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2014.0936
更新日期:2015-05-01 00:00:00
abstract::Male-biased susceptibility to parasites is common in dioecious plants. However, why males have higher parasite loads than females is unclear. Unlike males, females must subsidize post-fertilization costs of reproduction (e.g. seed and fruit development). As a result, females may have smaller pools of resources potenti...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2018.0761
更新日期:2019-03-29 00:00:00
abstract::Although the adaptive value of flight may seem obvious, it is the most difficult behaviour of birds to monitor. Here, we describe a technique to quantify the frequency and the duration of flights over several months by implanting a data logger that records heart rate (fH), hydrostatic pressure (diving depth) and the b...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2007.0088
更新日期:2007-08-22 00:00:00
abstract::Telomeres are sensitive to damage induced by oxidative stress, and thus it is expected that dietary antioxidants may support the maintenance of telomere length in animals, particularly those with a fast rate of life (e.g. fast metabolism, activity and growth). We tested experimentally the effect of antioxidant supplem...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0211
更新日期:2015-05-01 00:00:00
abstract::Lateralization is a well-described phenomenon in humans and other vertebrates and there are interesting parallels across a variety of different vertebrate species. However, there are only a few studies of lateralization in invertebrates. In a recent report, we showed lateralization of olfactory learning in the honeybe...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2007.0466
更新日期:2008-02-23 00:00:00
abstract::Animals living around humans may habituate to us, but little is known about the consequences of this habituation. Some wildlife managers assume that habituation to humans makes individuals less likely to respond to natural predators, which is something to be avoided in captive breeding programmes where animals are des...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2008.0078
更新日期:2008-06-23 00:00:00
abstract::Historically, bird song has been regarded as a sex-specific signalling trait; males sing to attract females and females drive the evolution of signal exaggeration by preferring males with ever more complex songs. This view provides no functional role for female song. Historic geographical research biases generalized p...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2019.0059
更新日期:2019-04-26 00:00:00
abstract::The existence of consistent individual differences in behaviour ('animal personality') has been well documented in recent years. However, how such individual variation in behaviour is maintained over evolutionary time is an ongoing conundrum. A well-studied axis of animal personality is individual variation along a bo...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0029
更新日期:2015-04-01 00:00:00
abstract::The phenotypic effect of mutations can depend on their genetic background, a phenomenon known as epistasis. Many experimental studies have found that epistasis is pervasive, and some indicate that it may follow a general pattern dependent on the fitness effect of the interacting mutations. These studies have, however,...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2012.0328
更新日期:2013-02-23 00:00:00
abstract::Ecological resilience has become a focal concept in ecosystem management. Palaeoecological records (i.e. the sub-fossil remains preserved in sediments) are useful archives to address ecological resilience since they can be used to reconstruct long-term temporal variations in ecosystem properties. The special feature p...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2020.0881
更新日期:2021-01-01 00:00:00
abstract::Disentangling the relative contribution of predation avoidance and increased foraging efficiency in the evolution of sociality in animals has proven difficult given that the two types of benefits often operate concurrently. I identified different types of refuges from predation in birds related to morphological and ec...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2009.1063
更新日期:2010-08-23 00:00:00
abstract::Postzygotic isolation may be important for maintaining species boundaries, particularly when premating barriers are incomplete. Little is known about the course of events leading from minor environmental mismatches affecting hybrid fitness to severe genetic incompatibilities causing sterility or inviability. We invest...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2013.0169
更新日期:2013-04-10 00:00:00
abstract::Natural populations of free-living protists often exhibit high-levels of intraspecific diversity, yet this is puzzling as classic evolutionary theory predicts dominance by genotypes with high fitness, particularly in large populations where selection is efficient. Here, we test whether negative frequency-dependent sel...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0192
更新日期:2015-06-01 00:00:00
abstract::Despite hopes that the processes of molecular evolution would be simple, clock-like and essentially universal, variation in the rate of molecular evolution is manifest at all levels of biological organization. Furthermore, it has become clear that rate variation has a systematic component: rate of molecular evolution ...
journal_title:Biology letters
pub_type: 杂志文章,评审
doi:10.1098/rsbl.2009.0136
更新日期:2009-06-23 00:00:00
abstract::Males of the coqui treefrog, Eleutherodactylus coqui, produce a distinct two-note 'co-qui' advertisement call from sunset to midnight throughout most of the year. Previous work established that both the spectrotemporal aspects of the call and the frequency of highest inner-ear sensitivity change with altitude above se...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2017.0317
更新日期:2017-12-01 00:00:00
abstract::Most songbirds learn their songs from adult tutors, who can be their father or other male conspecifics. However, the variables that control song learning in a natural social context are largely unknown. We investigated whether the time of hatching of male domesticated canaries has an impact on their song development a...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0522
更新日期:2015-08-01 00:00:00
abstract::Lack of information is a constraint but ignorance can sometimes assist the evolution of cooperation by constraining selfishness. We discuss examples involving both ignorance of role or pay-off and ignorance of relatedness. Ignorance can favour cooperative traits like grouping and warning coloration and reduce conflict...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2013.0365
更新日期:2013-10-16 00:00:00
abstract::Tool use in extant primates may inform our understanding of the conditions that favoured the expansion of hominin technology and material culture. The 'method of exclusion' has, arguably, confirmed the presence of culture in wild animal populations by excluding ecological and genetic explanations for geographical vari...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2014.0508
更新日期:2014-11-01 00:00:00
abstract::The plight of the marine fisheries is attracting increasing attention as unsustainably high exploitation levels, exacerbated by more extreme climatic conditions, are driving stocks to the point of collapse. The North Atlantic cod (Gadus morhua), a species which until recently formed a major component of the demersal f...
journal_title:Biology letters
pub_type: 社论
doi:10.1098/rsbl.2008.0443
更新日期:2008-12-23 00:00:00
abstract::Domestic dogs have been recognized for their social sensitivity and aptitude in human-guided tasks. For example, prior studies have demonstrated that dogs look to humans when confronted with an unsolvable task; an action often interpreted as soliciting necessary help. Conversely, wolves persist on such tasks. While do...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0489
更新日期:2015-09-01 00:00:00
abstract::The muscles that effect lung ventilation are key to understanding the evolutionary constraints on animal form and function. Here, through electromyography, we demonstrate a newly discovered respiratory function for the iliocostalis muscle in the American alligator ( Alligator mississippiensis). The iliocostalis is act...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2019.0354
更新日期:2019-07-26 00:00:00