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Cryoprotective effect of glycerol concentrations on Indian Red Jungle Fowl (Gallus gallus murghi) spermatozoa

Posted on 20. August, 2018.

Semen cryopreservation protocols for wild avian species need to be optimised in order to achieve optimum post-thaw sperm quality and fertility. The present study was designed to evaluate the cryoprotective effect of different glycerol concentrations (11%, 15% and 20%) on post-thaw quality, recovery rates, absolute livability index and fertility of Indian Red Jungle Fowl (Gallus gallus murghi) semen. 


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Plasticity in nest placement of the Turtle Dove (Streptopelia turtur): experimental evidence from Moroccan agro-ecosystems

Posted on 31. July, 2014.

When selecting a nest placement, birds need to balance several requirements and risks. Indeed, nest location is considered the main adaptive response against nest predation pressure, climatic conditions and human disturbances.


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Gizzard mass dynamics of nestling Rooks Corvus frugilegus

Posted on 24. June, 2014.

In the avian digestive system, the gizzard is of key importance in processing food, but developmental changes of this organ have rarely been studied in nestlings of non-domesticated birds or under natural conditions.


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Extra-pair paternity in relation to age of the Red-breasted Flycatcher Ficedula parva males

Posted on 9. June, 2014.

In many bird species, social monogamy is widely observed but real mating systems can differ significantly from findings based on behavioural observations, especially among passerine birds.


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Non-classical signalling of growth hormone in the chick neural retina?

Posted on 24. March, 2014.

Signalling normally involves the interaction of a ligand with its receptor in target sites. 
This brief review focuses on the possibility that Growth Hormone (GH) in the neural retina of early chick embryos acts non-classically or via 'non-classical' GH-receptors.


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Relationship between glucose and pancreatic hormones during the embryonic and postnatal phase in chickens

Posted on 10. March, 2014.

Insulin plays a vital role in the regulation of glucose levels in the bloodstream. Chickens have similar circulating insulin concentrations compared to mammals but still maintain high plasma glucose levels.


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  Endangered Avian Species Captive Propagation - Free Content

Posted on 27. February, 2014.

Bird species, like plants and other animals are facing an unprecedented decline. Captive breeding as a conservation tool can be used as a substitute for wild populations in research and education, to provide demographic and genetic reservoirs for reinforcing or founding wild populations, and as a last resort for species that have no immediate opportunity for survival in nature.


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Bidirectional selection for yolk testosterone content in Japanese quail

Posted on 25. February, 2014.

The variability of hormone levels in avian eggs has often been accounted for by adaptive yolk hormone-mediated maternal effects by which the phenotype of the next generation can be adjusted to environmental conditions experienced by the mother. The environment, therefore, represents an important variable that can create variations in the relative amounts of yolk hormones.


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Avian Biology Research - Special Issue on General and Comparative Endocrinology

Posted on 19. February, 2014.

Dr. Mary Ann Ottinger, Editor of Avian Biology Research, introduces a special issue on general and comparative endocrinology.


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