Mailing List

For all the latest news and features, sign up to receive our FREE updates by email:

Effects of supplemental food on the behaviour and paternity status of male Indigo Buntings (Passerina cyanea)

Posted on 11. June, 2018.

Breeding is energetically costly and, if energy-limited, birds may alter their time budgets, spending less time engaged in some activities and more time in others. Investigators who have provided breeding birds with supplemental food have noted changes in time budgets, but the extent and types of changes have been found to vary among species. 

Read more
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.

Read more
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.

Read more
  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.

Read more
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.

Read more
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.

Read more
Collection, isolation, and culture of somatic cells from avian semen

Posted on 14. January, 2014.

Somatic cells recovered from avian semen could be used in chimera formation or cloning of endangered birds; especially important when a genetically unique animal dies and the only viable genetic material available is semen cryopreserved for artificial insemination and in vitro fertilization purposes. Although used in mammalian reproduction, this technology is lacking for avian semen. A minimally invasive technique to conserve avian genetic diversity is described that uses fresh avian semen from domestic chickens as a source of somatic cells, specifically fibroblast-like cells and epithelial cells, for cytological analysis and somatic cell gene banking.

Read more
Diversity and distribution of avian lice on Greater Flamingo chicks (Phoenicopterus roseus) in Algeria

Posted on 20. December, 2013.

Interactions between wild birds and ectoparasites have received extensive attention by ecologists because the distribution and dynamics of parasites may drive population processes of their hosts by influencing survival and productivity. Areas of interest include the influence of host morphology and behaviour on ectoparasite numbers and distribution, and their vertical or horizontal transmission. Many studies reported that close proximity of individuals facilitates host infestation with colonial birds harbouring a large number and a great diversity of ectoparasites. Thus, chewing lice usually are transferred by direct contact and, less frequently, by louse flies.

Read more
Predators and livestock reduce bird nest survival

Posted on 14. November, 2013.

High nest predation is one of the factors potentially driving farmland bird declines, particularly in the case of ground-nesting species. Accordingly, recent calls have been made to address predation in agri-environment schemes, but this is hindered by limited understanding of how processes operating at different scales affect predation patterns and how additional factors such as livestock trampling contribute to reduced nest survival.

Read more
« 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 »