Black Brant from Alaska staging and wintering in Japan

Article Abstract:

Black Brunt from Alaska has been sighted in Japan as early as Nov. 5 and as late as Mar. 15, which indicates that the birds have nesting grounds along the East Siberian Sea Coast, between Yana and Chauna rivers. Low pressure systems producing northwesterly winds across the Gulf of Alaska cause their departure for wintering areas by mid-Nov. Some of the birds in the staging population spend the winters in and around the Izembek Lagoon. Weather data from the North Pacific reveals that at least three days during Oct and Nov have tailwinds favorable for brant migration to the west.

Japan, Bird migration

---

Ecological consequences of nest site fidelity in black brant

Article Abstract:

The ecological impacts of nest site fidelity in birds are examined. Specifically, this study looks at the relationship of the dispersal distance between consecutive nesting attempts with such factors as age, nest success, reproductive performance and spring environment for female black brant at Alaska's Tutakoke River from 1987 to 1993. Findings reveal scant proof of fidelity to natal sites. Successfully breeding brand travelled shorter distances than unsuccessfully breeding brant. Also, early nest-building brant moved farther than later nest-building brant.

Research, Behavior, Animal dispersal, Nest building, Brent-goose, Brent goose

---

Behavioral correlates of heart rates of free-living greater white-fronted geese

Article Abstract:

The heart rate and behavior of nine free-living Greater White fronted Geese were monitored, at wintering grounds in northern California. Heart rates varied from less than 100 beats per minute (BPM) to more than 400 BPM. Heart rate exceeded 400 BPM during agonistic encounters. Heart rates during non-strenuous activities varied from 80 to 140 BPM, rising to around 180 BPM when birds were alert.

Measurement, Physiological aspects, Heart beat, Heart rate, Geese

Similar abstracts:

• Abstracts: Thelytokous parthenogenesis and its consequences on inbreeding in an ant. An investigation of inbreeding depression and purging in captive pedigreed populations
• Abstracts: Urbanization and child growth in Nepal. Gender differences in growth and nutrition in a sample of rural Ontario schoolchildren
• Abstracts: Low power and implications for female mate choice theory. Foraging behavior of American Redstarts in breeding and wintering habitats: implications for relative food availability
• Abstracts: Growth rate control of protein and nucleic acid content in Streptomyces coelicolor A3(2) and Escherichia coli B/r
• Abstracts: ACF, an ISWI-containing and ATP-utilizing chromatin assembly and remodeling factor. Cdc53 targets phosphorylated G1 cyclins for degradation by the ubiquitin proteolytic pathway

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