Results 111 to 120 of about 126,453 (209)

Reproductive success and male traits in the spotless starling, Sturnus unicolor [PDF]

, 2009
Selection operates when the variability among individuals in heritable traits translates to differences in the number of offspring that survive to breed, which is a close estimate of fitness. Consequently, the outcome of sexual-selection should be higher
Celis, Patricia
core  

You Scratch My Back: White‐Footed Mouse (Peromyscus leucopus) Sibling Pairs Engage in Allogrooming in Response to Tick Burdens

Journal of Zoology, EarlyView.
This study investigated whether blacklegged tick (Ixodes scapularis) infestation influences allogrooming behavior in sibling pairs of white‐footed mice (Peromyscus leucopus). Using laboratory‐reared siblings housed in pairs, we compared allogrooming frequency and cumulative duration between tick‐infested and non‐infested groups across both sexes ...
Jessica E. Brown, Caroline Stickler, Erika T. Machtinger   +2 more
wiley   +1 more source

Evidence for social parasitism of early insect societies by Cretaceous rove beetles

Nature Communications, 2016
Social insects are commonly parasitized by beetles that live inside colonies and consume nest resources or even the brood. Here, Yamamotoet al. present fossil evidence that social parasitism by beetles dates back at least 99 million years—contemporaneous
Shûhei Yamamoto, Munetoshi Maruyama, Joseph Parker   +2 more
doaj   +1 more source

Comparative Loss of Reproductive Potential Among Increased Clutch Sizes in Relation to Climate Change in a High Trophic Avian Predator: A 44‐Year Study

Journal of Zoology, EarlyView.
A North America, Wisconsin population of breeding Cooper's Hawks (Astur cooperii) is responding favorably to recent climate change with earlier egg‐laying and increased reproduction. But a 44‐year study demonstrated that tallies of older age offspring only at the nestling stage wouldunderestimate the comparatively higher loss of embryos and hatchlings ...
R. N. Rosenfield, J. Bielefeldt, P. N. Frater, G. T. Burns   +3 more
wiley   +1 more source

Predicting Nest Success from Habitat Features in Aspen Forests of the Central Rocky Mountains [PDF]

, 2001
We collected nesting data on bird use of aspen stands in the Routt and Medicine Bow National Forests between 1987 and 1989. We found active nest sites of 28 species of small nongame birds on nine study plots in undisturbed aspen forests.
Hayward, G., Struempf, H.M., Anderson, S., Finch, D.M.   +3 more
core  

Bacterial composition of Polygenis (Polygenis) bohlsi bohlsi (Wagner, 1901) (Siphonaptera: Rhopalopsyllidae) associated with Thrichomys fosteri (Rodentia: Echimyidae) in the Brazilian Pantanal wetland

Medical and Veterinary Entomology, EarlyView.
This study characterizes the bacteriome of Polygenis (Polygenis) bohlsi bohlsi fleas collected from free‐living Thrichomys fosteri in the Pantanal region of Brazil. The bacterial microbiota associated with male fleas exhibited greater phylogenetic diversity, and the overall community structure differed between the flea sexes.
Michelli Inácio Gonçalves Funnicelli, Renan Bressianini do Amaral, Victória Valente Califre de Mello, Ricardo Bassini‐Silva, Lizeth Fernanda Banguero Micolta, Marie Buysse, William Oliveira de Assis, Alanderson Rodrigues da Silva, Heitor Miraglia Herrera, Rosangela Zacarias Machado, Darci Moraes Barros‐Battesti, Daniel Guariz Pinheiro, Olivier Duron, Marcos Rogério André   +13 more
wiley   +1 more source

Comparison of parasitism level in two sympatric passerines: The pied flycatcher and the great tit [PDF]

, 1998
Parasites: have negative effects on their hosts and the latter evolve adaptations to reduce the burden of the parasites. This co-evolution profess may result in similar host species in similar habitats, parasitised by similar parasite species, having ...
Bauchau, V.
core  

Spatial relatedness and brood parasitism in a female-philopatric bird population

, 2008
The spatial structure of relatedness between individuals in a population can be crucial for social selection and evolution. Here we analyze a female alternative reproductive tactic, conspecific brood parasitism, in relation to spatial relatedness among ...
Peter Waldeck, Malte Andersson, Mikael Kilpi, Markus �st, Öst, M, Waldeck, Peter,, Andersson, Malte,, Kilpi, M.   +7 more
core   +1 more source

For colonization success, should hosts and microbes travel alone, together, or swap partners along the way?

New Phytologist, EarlyView.
Experimental co‐introduction of duckweeds (Lemna japonica) and their microbiome in a common pond. Summary Microbiomes that enhance the performance of host plants are likely to be co‐introduced with their host during colonization because of their intimate association.
Takuji Usui, Jingcheng Yu, Megan E. Frederickson   +2 more
wiley   +1 more source

Video evidence that cuckoos farm their hosts by ejecting nestlings

Ecology and Evolution
When host nests are scarce, avian brood parasites would benefit from behaviours that increase the availability of suitable nests. Several studies reported ejection of host nestlings from nests by brood parasites; however, whether brood parasites do so to
Jinggang Zhang, Peter Santema, Jianqiang Li, Wenhong Deng, Bart Kempenaers   +4 more
doaj   +1 more source