Genetic and environmental components of phenotypic variation in immune response and body size of a colonial bird, Delichon urbia (the house martin)

Article Abstract:

Genetic and environmental components of phenotypic variation in body size and immune response of Delichon urbia (the house martin), a colonial, highly social bird in southern Europe. To separate the two factors, a partial cross-fostering experiment was carried out by exchanging half of the offspring of pairs of nests after hatching. No significant additive variance was seen in immune response parameters. Significant environmental variance was seen. Highly social species have limited room for immediate microevolutionary response to selection.

Italy, Spain, Social aspects, Host-parasite relationships, Parasitic insects, Immunogenetics

---

Recent studies of avian sex ratios

Article Abstract:

Recent studies of avian sex ratios are reviewed with a discussion of two reasons for sex allocation theory and its success's in predicting sex ratios in such taxa as parasitoid wasps being cited frequently as one of the greatest achievements of theoretical evolutionary biology. Until molecular genetic techniques were developed it was hard to get avian sex ratio data before substantial offspring mortality, and the theory and data needed to predict sex allocation patterns in vertebrates are complex and difficult to get.

Sweden, Research, Natural selection, Sexual selection in animals, Sexual selection (Natural selection), Sex ratio

---

Genetic variation of resistance to mercury poisoning in steelhead (Oncorhynchus mykiss) alevins

Article Abstract:

Research has been conducted on steelhead alevins. The authors have investigated the potential for genetic modification of steelhead populations affected by highly toxic methylmercury, and report the results.

United States, Toxins, Variation (Biology), Steelhead (Fish), Steelhead (Fishes), Mercury poisoning

Similar abstracts:

• Abstracts: Genetic and phenotypic correlations in plants: a botanical test of Cheverud's conjecture. A new approach to the study of genetic variability of complex characters
• Abstracts: Genetic and environmental influences on infant weight and weight change: the Fels longitudinal study. Child growth as a measure of livelihood security: the case of the Gwembe Tonga
• Abstracts: Geographic, ecological and subspecific variations in the song of the Rufous-Browed Peppershrike (Cyclarhis Gujanensis)
• Abstracts: Use of a sentinel system for field measurements of Cryptosporidium parvum oocyst inactivation in soil and animal waste
• Abstracts: Ski is a component of the histone deacetylase complex required for transcriptional repression by Mad and thyroid hormone receptor

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.