Results 41 to 50 of about 73,706 (287)

Clutch Abandoning Parasitised Yellow Warblers Have Increased Circulating Corticosterone With No Effect of Past Corticosterone or Differences in Egg Maculation Characteristics

Frontiers in Ecology and Evolution, 2022
Parental care can be costly to parents’ fitness. As such, abandonment of the current reproductive attempt may benefit potential future opportunities, maximising lifetime reproductive success.
Antoine V. Turcotte-van de Rydt, Christina Petalas, Christina Petalas, Joanna M. Sblendorio, Christopher A. Pearl, Sharon A. Gill, Mélanie F. Guigueno   +6 more
doaj   +1 more source

Egg rejection and clutch phenotype variation in the plain prinia Prinia inornata

Journal of Avian Biology, 2016
Avian hosts of brood parasites can evolve anti‐parasitic defenses to recognize and reject foreign eggs from their nests. Theory predicts that higher inter‐clutch and lower intra‐clutch variation in egg appearance facilitates hosts to detect parasitic ...
Longwu Wang, Wei Liang, Canchao Yang, Shun‐Jen Cheng, Yu‐Cheng Hsu, Xin Lu   +5 more
doaj   +1 more source

Egg arrangement in avian clutches covaries with the rejection of foreign eggs

Animal Cognition, 2013
In birds, the colour, maculation, shape, and size of their eggs play critical roles in discrimination of foreign eggs in the clutch. So far, however, no study has examined the role of egg arrangement within a clutch on host rejection responses. We predicted that individual females which maintain consistent egg arrangements within their clutch would be ...
Polacikova, L., Takasu, F., Stokke, B., Moksnes, A., Roskaft, E., Cassey, P., Hauber, M., Grim, T.   +7 more
openaire   +4 more sources

The Perceptual and Cognitive Processes That Govern Egg Rejection in Hosts of Avian Brood Parasites

Frontiers in Ecology and Evolution, 2021
Hosts of avian brood parasites are under intense selective pressure to prevent or reduce the cost of parasitism. Many have evolved refined egg discrimination abilities, which can select for eggshell mimicry in their parasite.
Daniel Hanley, Samantha L. Rutledge, Samantha L. Rutledge, Juliana Villa   +3 more
doaj   +1 more source

Ethogram and classification of the mating and egg-laying behaviour of the Southeast Asian apple snail Pila virescens (Deshayes, 1824) (Mollusca, Gastropoda, Caenogastropoda, Ampullariidae) [PDF]

ZooKeys, 2023
The status of the indigenous Southeast Asian apple snails belonging to the genus Pila is of concern due to their fast rate of population decline, possibly as a result of multiple factors including habitat loss or disturbance and the introduction of ...
Supunya Annate, Ting Hui Ng, Chirasak Sutcharit, Somsak Panha   +3 more
doaj   +3 more sources

The lady vanishes: what's missing from the stem cell debate [PDF]

, 2006
Most opponents of somatic cell nuclear transfer and embryonic stem cell technologies base their arguments on the twin assertions that the embryo is either a human being or a potential human being, and that it is wrong to destroy a human being or ...
A. Fagot-Largeault, A. Jacobs, A. M. Honore, A. Ryan, C. A. MacKinnon, C. McLeod, C. Pateman, C. Waldby, CCNE (Comite Consultatif National d’Ethique), CCNE (Comite Consultatif National d’Ethique) and Nationaler Ethikrat. Opinion no. 77, D. B. Resnik, D. Dickenson, D. Dickenson, D. Dickenson, D. Dickenson, D. Dickenson, D. Dickenson, D. Dickenson, Donna L. Dickenson, E. Marshall, G. A. Cohen, G. Meilander, G. W. F. Hegel, HUGO (Human Genome Organisation) Ethics Council, I. Schneider, J. Boyle, J. E. Penner, J. E. Penner, J. L. Schroeder, J. Locke, J. Mahoney, J. McHale, J. Montgomery, J. W. Harris, J. Waldron, K. E. Ferguson, K. Momberger, L. Brace, M. J. Radin, R. Macklin, R. R Faden, Royal College of Obstetricians and Gynaecologists (RCOG) Ethics Committee, S. Dodds, S. E. Lanzendorf, S. Holland, S. Holm, T. Grey, T. Harrison, T. Murray, W. E. Connolly, W. S. Hwang   +50 more
core   +2 more sources

Age-Related Brood Parasitism and Egg Rejection in Magpie Hosts

The American Naturalist, 2020
When the strength or nature of a host-parasite interaction changes over the host life cycle, the consequences of parasitism can depend on host population age structure. Avian brood parasites reduce hosts' breeding success, and host age may play a role in this interaction if younger hosts are more likely parasitized and/or less able to defend themselves.
Juan Gabriel, Martínez, Mercedes, Molina-Morales, Marta, Precioso, Jesús Miguel, Avilés   +3 more
openaire   +3 more sources

Model eggs fail to detect egg recognition in host populations after brood parasitism is relaxed

Frontiers in Zoology, 2020
Background Obligate brood parasites exert strong selective pressure on target hosts. In response, hosts typically evolve anti-parasitism strategies, of which egg recognition is one of the most efficient.
Canchao Yang, Longwu Wang, Shun-Jen Cheng, Yu-Cheng Hsu, Anders Pape Møller, Wei Liang   +5 more
doaj   +1 more source

Combining personal with social information facilitates host defences and explains why cuckoos should be secretive. [PDF]

, 2016
Individuals often vary defences in response to local predation or parasitism risk. But how should they assess threat levels when it pays their enemies to hide? For common cuckoo hosts, assessing parasitism risk is challenging: cuckoo eggs are mimetic and
Davies, Nicholas B, Thorogood, Rose
core   +1 more source

Frequency-dependent and correlational selection pressures have conflicting consequences for assortative mating in a color-polymorphic lizard, Uta stansburiana [PDF]

, 2014
Acknowledgments We would like to thank the numerous undergraduate researchers involved with this project for their invaluable assistance in lizard rearing and data collection. We also thank D. Haisten, A. Runemark, Y. Takahashi, and M.
Hipsley, Christy A, Lancaster, Lesley T, McAdam, Andrew G, Sinervo, Barry R   +3 more
core   +1 more source