Environmental influence and cohort effects in a sexual ornament in the house sparrow, Passer domesticus

Article Abstract:

A study is conducted to examine whether environmental influence and cohort effects in a sexual ornament of male house sparrow (Passer domesticus) is independent on individual variation in the conditions during early ontogenic stages and later life. It is found that badge-size is an environmentally dependent trait in house sparrows and likely to be under the influence of both natural and sexual selection.

Norway, Sexual behavior, Physiological aspects

---

The devil lies in details: reply to Stuart Hurlbert

Article Abstract:

A response is provided for Stuart Hurlbert's reply, emphasizing on the misconceptions of the logical equivalence between compound treatments and pseudoreplication. Guidelines are proposed for discarding the counterproductive aspects of Hulbert's propositions without going back to the real problems, which were present in the ecological literatures before 1984 and which are still present.

Health behavior, Ecosystems, Health behaviour

---

Dynamics of an immune response in house sparrows Passer domesticus in relation to time of day, body condition and blood parasite infection

Article Abstract:

The temporal dynamics of the T-cell mediated response in house sparrows Passer domesticus for the determination of factors contributing to temporal and individual variation in phytohemagglutinin (PHA) response are investigated. The inability of infected individuals with large fluctuations in mass to mount a strong immune response is discussed.

Genetic aspects, T cells

Similar abstracts:

• Abstracts: The Caspian Sea region: environmental change. Climatic, socio-economic and health factors affecting human vulnerability to cholera in the Lake Victoria basin, East Africa
• Abstracts: Some roles for North American ecologists in land-use planning in the tropics. ESA report: ecological principles and guidelines for managing the use of land
• Abstracts: Direct experimental evidence for alternative stable states: A review. Size-dependent attack rate and handling capacity: inter-cohort competition in a zooplanktivorous fish
• Abstracts: Incorporating community objectives in improved wetland management: the use of the analytical hierarchy process
• Abstracts: Neonatal growth and survival of rodents in response to variation in maternal dietary nitrogen: Life history strategy vs dietary niche

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