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 showed that the constitutive antibacterial activity present in the haemolymph of H. axyridis beetles can be attributed to the chemical defence compound harmonine. Here, we demonstrate that H. axyridis differs from other insects, including the native ladybird Coccinella septempunctata, by reducing rather than increasing the antimicrobial activity of its haemolymph following the injection of bacteria. However, both species produce new or more abundant proteins in the haemolymph, indicating that bacterial challenge induces innate immune responses associated with the synthesis of immunity-related proteins. Our results suggest that H. axyridis beetles can switch from constitutive chemical defence to inducible innate immune responses, supporting hypothesis that inducible antimicrobial peptides protect host beetles against pathogens that survive constitutive defences. These alternative antimicrobial defence mechanisms may reflect a trade-off resulting from fitness-related costs associated with the simultaneous synthesis of harmonine and antimicrobial peptides/proteins.
journal_name
Biol Lettjournal_title
Biology lettersauthors
Schmidtberg H,Röhrich C,Vogel H,Vilcinskas Adoi
10.1098/rsbl.2013.0006subject
Has Abstractpub_date
2013-03-06 00:00:00pages
20130006issue
3eissn
1744-9561issn
1744-957Xpii
rsbl.2013.0006journal_volume
9pub_type
杂志文章相关文献
Biology Letters文献大全abstract::Anthropogenic salinization of rivers is an emerging issue of global concern, with significant adverse effects on biodiversity and ecosystem functioning. Impacts of freshwater salinization on biota are strongly mediated by evolutionary history, as this is a major factor determining species physiological salinity tolera...
journal_title:Biology letters
pub_type: 杂志文章,评审
doi:10.1098/rsbl.2015.1072
更新日期:2016-03-01 00:00:00
abstract::Novel object trials are commonly used to assess aversion to novelty (neophobia), and previous work has shown neophobia can be influenced by the social environment, but whether the altered behaviour persists afterwards (social learning) is largely unknown in wild animals. We assessed house sparrow (Passer domesticus) n...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2020.0286
更新日期:2020-09-01 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::The Didelphidae are considered solitary opossums with few social interactions, usually limited to mating-related or mother-pouch young interactions. Anecdotal reports suggest that additional interactions occur, including den sharing by a few individuals, usually siblings. Here, we report novel observations that indica...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0307
更新日期:2015-06-01 00:00:00
abstract::Despite having a profound effect on population dynamics, the reasons that animals disperse are poorly understood. Evolutionary explanations have focused on inbreeding and competition, where the potential cost of philopatry is negated through dispersal. Such scenarios lead to the prediction that less successful individ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2010.1119
更新日期:2011-06-23 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::Sexual conflict occurs when selection to maximize fitness in one sex does so at the expense of the other sex. In the burying beetle Nicrophorus vespilloides, repeated mating provides assurance of paternity at a direct cost to female reproductive productivity. To reduce this cost, females could choose males with low re...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.1064
更新日期:2016-03-01 00:00:00
abstract::The response to intradermally injected phytohaemagglutinin (PHA-response) is a commonly used quantification of avian immunocompetence (the ability to resist pathogens). Parasite-mediated sexual selection requires heritable immunocompetence, but evidence for heritability of PHA-response in birds largely stems from full...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2007.0135
更新日期:2007-08-22 00:00:00
abstract::Despite major advances in the study of animal tool behaviour, researchers continue to debate how exactly certain behaviours are acquired. While specific mechanisms, such as genetic predispositions or action copying, are sometimes suspected to play a major role in behavioural acquisition, controlled experiments are req...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2020.0122
更新日期:2020-06-01 00:00:00
abstract::Human-induced environmental change can affect the evolutionary trajectory of populations. In Mexico, indigenous Zoque people annually introduce barbasco, a fish toxicant, into the Cueva del Azufre to harvest fish during a religious ceremony. Here, we investigated tolerance to barbasco in fish from sites exposed and un...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2010.0663
更新日期:2011-04-23 00:00:00
abstract::Prior to the 1920s, the northeast Arctic (NA) cod were caught at spawning grounds ranging from the southernmost to the northernmost parts of the Norwegian coast, but have for the last 50 yr mainly been caught around the Lofoten archipelago and northwards. The NA cod have their feeding and nursery grounds in the Barent...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2009.0789
更新日期:2010-04-23 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::Mosquitoes, which evade contact with long-lasting insecticidal nets and indoor residual sprays, by feeding outdoors or upon animals, are primary malaria vectors in many tropical countries. They can also dominate residual transmission where high coverage of these front-line vector control measures is achieved. Compleme...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2012.0352
更新日期:2012-10-23 00:00:00
abstract::Many amphibian lineages show terrestrialization of their reproductive strategy and breeding is partially or completely independent of water. A number of causal factors have been proposed for the evolution of terrestrialized breeding. While predation has received repeated attention as a potential factor, the influence ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2012.1146
更新日期:2013-03-27 00:00:00
abstract::Long-distance migrants are particularly recognized for the distances covered on migration, yet little is known about the distances they cover during the rest of the year. GPS-tracks of 29 Montagu's harriers from breeding areas in France, The Netherlands and Denmark showed that harriers fly between 35 653 and 88 049 km...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2017.0073
更新日期:2017-06-01 00:00:00
abstract::In this study of body temperatures (T(b)) in free ranging dromedary camels, we found that bulls in rut start the days cooler. Daily minima during rut averaged 0.6 degrees C lower than at other times (95% CI 0.27-0.94 degrees C) and daily maxima averaged 0.45 degrees C higher (95% CI -0.01 to -0.91 degrees C), increasi...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2009.0450
更新日期:2009-12-23 00:00:00
abstract::In a warming climate, higher temperatures are likely to modulate positively or negatively the effect of other environmental factors on biota, although such interactions are poorly documented. Here, we explore under controlled conditions the combined effects of two common stressors in freshwater ecosystems, higher temp...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2016.0745
更新日期:2016-12-01 00:00:00
abstract::Fire is the most frequent disturbance in the Ericaceous Belt (ca 3000-4300 m.a.s.l.), one of the most important plant communities of tropical African mountains. Through resprouting after fire, Erica establishes a positive fire feedback under certain burning regimes. However, present-day human activity in the Bale Moun...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2019.0357
更新日期:2019-07-26 00:00:00
abstract::The interaction between neuromuscular systems and body mechanics plays an important role in the production of coordinated movements in animals. Lepidopteran insects move their wings by distortion of the thorax structure via the indirect flight muscles (IFMs), which are activated by neural signals at every stroke. Howe...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0733
更新日期:2016-01-01 00:00:00
abstract::Spatial and temporal heterogeneity in relative fitness of competing species is a key factor affecting the structure of communities. However, it is not intuitive why species that are ecologically similar should differ in their response to environmental changes. Here we show that two sympatric flycatchers differ in repr...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2004.0265
更新日期:2005-03-22 00:00:00
abstract::Most large raptors on migration avoid crossing the sea because of the lack of atmospheric convection over temperate seas. The osprey Pandion haliaetus is an exception among raptors, since it can fly over several hundred kilometres of open water. We equipped five juvenile ospreys with GPS-Accelerometer-Magnetometer log...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2018.0687
更新日期:2018-12-21 00:00:00
abstract::Inbreeding causes increases in homozygosity and is commonly associated with reductions in fertility and embryogenesis. Although the mechanisms underlying such effects are unknown, recent work has suggested that inbred males may suffer impaired ejaculate quality, thus providing a functional explanation for reductions i...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2008.0734
更新日期:2009-06-23 00:00:00
abstract::Nursery areas are fundamental for the success of many marine species, particularly for large, slow-growing taxa with low fecundity and high age of maturity. Here, we examine the population size-class structure of the extinct gigantic shark Otodus megalodon in a newly described middle Miocene locality from Northeastern...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2020.0746
更新日期:2020-11-01 00:00:00
abstract::Long-term memory can be critically important for animals in a variety of contexts, and yet the extreme reduction in body temperature in hibernating animals alters neurochemistry and may therefore impair brain function. Behavioural studies on memory impairment associated with hibernation have been almost exclusively co...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2010.0585
更新日期:2011-02-23 00:00:00
abstract::Recent evidence for feathers in theropods has led to speculations that the largest tyrannosaurids, including Tyrannosaurus rex, were extensively feathered. We describe fossil integument from Tyrannosaurus and other tyrannosaurids (Albertosaurus, Daspletosaurus, Gorgosaurus and Tarbosaurus), confirming that these large...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2017.0092
更新日期:2017-06-01 00:00:00
abstract::In Drosophila melanogaster, prolonged exposure to males reduces the longevity and fecundity of females. This harm arises from the effects of male courtship behaviours and the toxic side effects of the accessory gland proteins (Acps) in their seminal fluids. Here, we examine the relationship between male exposure and i...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2016.0105
更新日期:2016-04-01 00:00:00
abstract::In contrast to daily rhythms that are common in the presence of the geophysical light-dark cycle, organisms at polar latitudes exhibit many diel activity patterns during natural periods of continuous solar light or darkness (polar day and night, respectively), from 24 h rhythms to arrhythmicity. In Arctic Greenland (7...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2016.0289
更新日期:2016-09-01 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::The hormone corticosterone (CORT) is an important component of a bird's response to environmental stress, but it can also have negative effects. Therefore, birds on migration are hypothesized to have repressed stress responses (migration-modulation hypothesis). In contrast to earlier studies on long-distance migrants,...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2009.0193
更新日期:2009-08-23 00:00:00
abstract::Cooperative alliances among kin may not only lead to indirect fitness benefits for group-living species, but can also provide direct benefits through access to mates or higher social rank. However, the immigrant sex in most species loses any potential benefits of living with kin unless immigrants disperse together or ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.0336
更新日期:2015-07-01 00:00:00