Results 271 to 280 of about 96,797 (305)
Some of the next articles are maybe not open access.
Behavioral Ecology and Sociobiology, 2011
It has been proposed that the blue-green bird egg colourations of many avian species may constitute a sexually selected female signal that males can use to modulate their parental investment. A fundamental untested assumption for the validation of this hypothesis is that males can accurately assess differences in the colour of eggs.
Jesús M. Avilés +2 more
openaire +1 more source
It has been proposed that the blue-green bird egg colourations of many avian species may constitute a sexually selected female signal that males can use to modulate their parental investment. A fundamental untested assumption for the validation of this hypothesis is that males can accurately assess differences in the colour of eggs.
Jesús M. Avilés +2 more
openaire +1 more source
Kin discrimination during egg‐cannibalism in smooth newts: does competition matter?
Journal of Zoology, 2010Kin discrimination has often been investigated in the context of cannibalism, where differential treatment of kin may entail inclusive fitness benefits if closely related conspecifics are spared during foraging. Competition between related individuals can greatly modify the fitness benefits of such behaviour, but its effect has rarely been tested.
Z. Tóth, H. Hoi, A. Hettyey
openaire +1 more source
Ambient light in domed nests and discrimination of foreign egg colors
Behavioral Ecology and Sociobiology, 2014In cuckoo-host coevolution, rejection of parasite eggs based on visual discrimination is the key host-defensive mechanism reducing the costs of parasitism. Although host discriminatory tasks often occur in variable environmental conditions, the influence of nest light variation on the perceptual processes involved in egg discrimination has been seldom ...
Jesús M. Avilés +4 more
openaire +1 more source
Egg pecking and discrimination by female and male Brown-headed Cowbirds
Journal of Ornithology, 2012Brood parasitic Brown-headed Cowbirds (Molothrus ater) remove host eggs in conjunction with parasitism, and also peck and destroy host eggs and nestlings in nests they have apparently not parasitized. Egg and nestling destruction by Brown-headed Cowbirds has been hypothesized to force hosts to re-nest, providing cowbirds with a future opportunity to ...
Keriann M. Dubina, Brian D. Peer
openaire +1 more source
Host discrimination by egg-laying seed beetles: causes of population differences
Animal Behaviour, 1991Abstract Egg-laying females of the seed beetle Callosobruchus maculatus discriminate against occupied (egg-laden) seeds, and thus reduce competition among larvae within seeds. Two strains (S and B) differed genetically in this trait. A factorial experiment was performed to distinguish whether greater avoidance of occupied hosts by S-strain females ...
Messina, Frank J. +2 more
openaire +2 more sources
Egg Traders Do Not Discriminate Between Familiar and Unfamiliar Partners
EthologyABSTRACT Reciprocity is one of the evolutionary mechanisms explaining cooperation between individuals and explains behaviors where individuals follow the rules “help who helped you before” (direct reciprocity) or “help anyone if helped by someone” (generalized reciprocity). In direct reciprocity, decisions require
Malo Loubière, Maria Cristina Lorenzi
openaire +1 more source
Rapid nondestructive qualitative discrimination of egg freshness by VIS/NIR spectroscopy
2019 Boston, Massachusetts July 7- July 10, 2019, 2019Abstract . In order to improve the discrimination efficiency of egg freshness, the visible/near-infrared spectroscopy was used to detect the freshness of eggs rapidly and non-destructively. In this study, White Leghorns eggs were used as test samples.
Zhixiong Shen +5 more
openaire +1 more source
Evidence of Conspecific Nest Parasitism and Egg Discrimination in the Sora
The Condor, 1995Conspecific nest parasitism (CNP) is relatively frequent among precocial species and several hypotheses for this pattern have been suggested (Rohwer and Freeman 1989, Lyon and Eadie 1991, Sorenson 1992). I report here observations made at the nest of a Sora, Porzana carolina, which suggest both the occurrence of CNP as well as very fine egg ...
openaire +1 more source
Identification Method of Egg Freshness by Principal Component and Discriminant Analysis
2017Eggs with relatively low cost contain all essential amino acids which human body needs. The freshness of the eggs reduces gradually with the extension of time. Albumen pH, yolk color, haugh units, density, weight loss and increasing rate of gas chamber diameter are often considered as the evaluation indexes under egg preservation.
Yinghao Xing +3 more
openaire +1 more source
Integrative oncology: Addressing the global challenges of cancer prevention and treatment
Ca-A Cancer Journal for Clinicians, 2022Jun J Mao,, Msce +2 more
exaly