Abstract:
:Western scrub-jays (Aphelocoma californica) have been shown to overcome present satiety to cache food they will desire in the future. Here, we show that another corvid, the Eurasian jay (Garrulus glandarius), can distinguish between two distinct future desires and plan for each appropriately, despite experiencing a conflicting current motivation. We argue that these data address the criticisms of previous work, and suggest a way in which associative learning processes and future-oriented cognition may combine to allow prospective behaviour.
journal_name
Biol Lettjournal_title
Biology lettersauthors
Cheke LG,Clayton NSdoi
10.1098/rsbl.2011.0909subject
Has Abstractpub_date
2012-04-23 00:00:00pages
171-5issue
2eissn
1744-9561issn
1744-957Xpii
rsbl.2011.0909journal_volume
8pub_type
杂志文章相关文献
Biology Letters文献大全abstract::Infection density is among the most important factors for understanding the biological effects of Wolbachia and other endosymbionts on their hosts. To gain insight into the mechanisms of infection density regulation, we investigated the adzuki bean beetles Callosobruchus chinensis and their Wolbachia endosymbionts. Do...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2005.0340
更新日期:2005-12-22 00:00:00
abstract::Social insect cuticular hydrocarbon (CHC) mixtures are among the most complex chemical cues known and are important in nest-mate, caste and species recognition. Despite our growing knowledge of the nature of these cues, we have very little insight into how social insects actually perceive and discriminate among these ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2011.0643
更新日期:2012-02-23 00:00:00
abstract::Hosts may defend themselves against parasitism through a wide variety of defence mechanisms, but due to finite resources, investment in one defence mechanism may trade-off with investment in another mechanism. We studied resistance strategies against the parasitoid wasp Leptopilina boulardi in two Drosophila species. ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2011.0725
更新日期:2012-04-23 00:00:00
abstract::Although the presence of feathers in the nest is widespread among birds, it has not been previously suggested that feathers can be used as sexual signals. Females of the spotless starling (Sturnus unicolor) regularly carry feathers to their nest, mostly during laying and incubation. We show that the arrangement of the...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2005.0329
更新日期:2005-09-22 00:00:00
abstract::Theories of extreme lifespan evolution in vertebrates commonly implicate large size and predator-free environments together with physiological characteristics like low metabolism and high protection against oxidative damages. Here, we show that the 'human fish' (olm, Proteus anguinus), a small cave salamander (weighin...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2010.0539
更新日期:2011-02-23 00:00:00
abstract::There is increasing evidence from non-human animals that males adjust their ejaculate expenditure according to the risk of sperm competition. In this study we show that, after controlling for lifestyle factors known to influence semen quality, human males viewing images depicting sperm competition had a higher percent...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2005.0324
更新日期:2005-09-22 00:00:00
abstract::In group-living vertebrates, reliable social allies play a decisive role in dealing with stressors. For example, support by social allies is known to dampen glucocorticoid responses. It remains unknown, however, how social embedding affects the sympatho-adrenergic axis as indicated by heart rate (HR) in non-human anim...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2011.0917
更新日期:2012-06-23 00:00:00
abstract::The harlequin ladybird, Harmonia axyridis, has emerged as a model species for invasion biology, reflecting its remarkable capacity to outcompete native ladybird species when introduced into new habitats. This ability may be associated with its prominent resistance to pathogens and intraguild predation. We recently sho...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2013.0006
更新日期:2013-03-06 00:00:00
abstract::Inclusive fitness theory predicts that organisms will tend to help close kin more than less related individuals. In a variety of birds and mammals, relatives are recognized by comparing their phenotype to an internal representation or template, which might be learned through either repeated exposure to family members ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2008.0789
更新日期:2009-06-23 00:00:00
abstract::The Himalayas are assumed to be undergoing rapid climate change, with serious environmental, social and economic consequences for more than two billion people. However, data on the extent of climate change or its impact on the region are meagre. Based on local knowledge, we report perceived changes in climate and cons...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2011.0269
更新日期:2011-10-23 00:00:00
abstract::White-nose syndrome is devastating North American bat populations but we lack basic information on disease mechanisms. Altered blood physiology owing to epidermal invasion by the fungal pathogen Geomyces destructans (Gd) has been hypothesized as a cause of disrupted torpor patterns of affected hibernating bats, leadin...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2013.0177
更新日期:2013-05-29 00:00:00
abstract::Marsupial frogs have a unique reproductive mode in which females carry eggs enclosed in a sealed dorsal brood pouch. While most anurans are considered to be oviparous with lecithotrophic eggs, the extensively vascularized membrane of the brood pouch in marsupial frogs suggests potential opportunities for nutrient tran...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2016.0673
更新日期:2016-10-01 00:00:00
abstract::Research on reproductive isolation in African cichlid fishes has largely focused on the role of nuptial colours, but other sensory modes may play an important role in mate choice. Here, we compare the relative importance of visual and olfactory cues in mate recognition by females of a Lake Malawi cichlid species. Fema...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2005.0355
更新日期:2005-12-22 00:00:00
abstract::The songs of oscine passerine birds vary on many spatial scales, reflecting the actions of diverse evolutionary pressures. Here we examine the songs of Cisticola erythrops, which effectively signal species identity across a geographical area spanning 6500 km in sub-Saharan Africa. Selection for species identification ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2009.0244
更新日期:2009-08-23 00:00:00
abstract::Regressive evolution of structures associated with vision in cave-dwelling organisms is the focus of intense research. Most work has focused on differences between extreme visual phenotypes: sighted, surface animals and their completely blind, cave-dwelling counterparts. We suggest that troglodytic systems, comprising...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2009.0549
更新日期:2010-02-23 00:00:00
abstract::Since the modern evolutionary synthesis was first proposed early in the twentieth century, attention has focused on assessing the relative contribution of mutation versus natural selection on protein evolution. Here we test a model that yields general quantitative predictions on rates of protein evolution by combining...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2007.0403
更新日期:2007-12-22 00:00:00
abstract::Parental effects have been shown to buffer the negative effects of within-generation exposure to ocean acidification (OA) conditions on the offspring of shallow water marine organisms. However, it remains unknown if parental effects will be impacted by the presence of diel CO2 cycles that are prevalent in many shallow...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2018.0724
更新日期:2019-02-28 00:00:00
abstract::Migratory animals present a unique challenge for predicting population size because they are influenced by events in multiple stages of the annual cycle that are separated by large geographic distances. Here, we develop a model that incorporates non-fatal carry-over effects to predict changes in population size and sh...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2005.0397
更新日期:2006-03-22 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::Understanding the pressures of fisheries on the ecosystem is crucial for effective management. Fishery removals, or catch, are composed of both landings and discards. However, the use of discards data in studies investigating the effect of the fishing pressures is sparse. Here, we explore the individual contribution o...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2013.0812
更新日期:2013-12-04 00:00:00
abstract::Drug resistance is a long-standing economic, veterinary and human health concern in human and animal populations. Efficacy of prophylactic drug treatments targeting a particular pathogen is often short-lived, as drug-resistant pathogens evolve and reach high frequency in a treated population. Methods to combat drug re...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0783
更新日期:2015-11-01 00:00:00
abstract::The role of niche specialization and narrowing in the evolution and extinction of the ichthyosaurs has been widely discussed in the literature. However, previous studies have concentrated on a qualitative discussion of these variables only. Here, we use the recently developed approach of quantitative ecospace modellin...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0339
更新日期:2015-07-01 00:00:00
abstract::The fluid-containing traps of Nepenthes carnivorous pitcher plants (Nepenthaceae) are often inhabited by organisms known as inquilines. Dipteran larvae are key components of such communities and are thought to facilitate pitcher nitrogen sequestration by converting prey protein into inorganic nitrogen, although this h...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2016.0928
更新日期:2017-03-01 00:00:00
abstract::Although plant-arthropod relationships underpin the dramatic rise in diversity and ecological dominance of flowering plants and their associated arthropods, direct observations of such interactions in the fossil record are rare, as these ephemeral moments are difficult to preserve. Three-dimensionally preserved charre...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2011.0696
更新日期:2012-04-23 00:00:00
abstract::The relationship between algae and their zooplanktonic predators typically involves consumption of nutrients by algae, grazing of the algae by zooplankton which in turn enhances predator biomass, controls algal growth and regenerates nutrients. Eutrophication raises nutrient levels, but does not simply increase normal...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2006.0447
更新日期:2006-06-22 00:00:00
abstract::Heritable bacterial endosymbionts play an important role in aphid ecology. Sequence-based evidence suggests that facultative symbionts such as Hamiltonella defensa or Regiella insecticola also undergo horizontal transmission. Other than through male-to-female transfer during the sexual generation in autumn, the routes...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2012.0144
更新日期:2012-08-23 00:00:00
abstract::While we can usually understand the impacts of invasive species on recipient communities, invasion biology lacks methodologies that are potentially more predictive. Such tools should ideally be straightforward and widely applicable. Here, we explore an approach that compares the functional responses (FRs) of invader a...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2007.0554
更新日期:2008-04-23 00:00:00
abstract::There is growing interest in the capacity of mangrove ecosystems to sequester and store 'blue carbon'. Here, we provide a synthesis of 66 dated sediment cores with previously calculated carbon accumulation rates in mangrove ecosystems to assess the effects of environmental and anthropogenic pressures. Conserved sedime...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2018.0237
更新日期:2018-10-31 00:00:00
abstract::Trophically transmitted parasites often alter their intermediate host's phenotype, thereby predisposing hosts to increased predation. This is generally considered to be a parasite strategy evolved to enhance transmission to the next host. However, the adaptive value of host manipulation is not clear, as it may be asso...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2008.0335
更新日期:2008-12-23 00:00:00
abstract::Coevolution with parasites is thought to maintain genetic diversity in host populations. However, while there are sound theoretical reasons to expect heterozygosity and parasite resistance to be related, this pattern has generally been shown only in inbred laboratory and island populations. This leaves doubt as to whe...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2004.0264
更新日期:2005-03-22 00:00:00