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Articles 1 - 4 of 4
Full-Text Articles in Ecology and Evolutionary Biology
Progress In Satellite Tracking Cranes, David H. Ellis, Dwight G. Smith, Glenn H. Olsen, Mark R. Fuller, Steven E. Landfried, Hiroyoshi Higuchi, Charles H. Vermillion
Progress In Satellite Tracking Cranes, David H. Ellis, Dwight G. Smith, Glenn H. Olsen, Mark R. Fuller, Steven E. Landfried, Hiroyoshi Higuchi, Charles H. Vermillion
Proceedings of the North American Crane Workshop
We review the history of tracking cranes with satellite telemetry and identify some of the difficulties in designing satellite transmitters and harnesses for cranes. Miniaturization of these transmitters and a plethora of harnessing experiments since 1989 allow us to recommend limited application of this technology to all species of cranes. We are still uncertain, however, if cranes harnessed with satellite telemetry devices are able to reproduce after migration. Because of this uncertainty, we urge caution in the use of this technology, especially with breeding adults in severely endangered popUlations. This manuscript also describes continuing research needs.
History And Economic Impact Of Crane-Watching In Central Nebraska, Gary R. Lingle
History And Economic Impact Of Crane-Watching In Central Nebraska, Gary R. Lingle
Proceedings of the North American Crane Workshop
The first documentation of the Platte and North Platte rivers' importance to sandhill cranes (Grus canadensis) dates from the late 1800's. Except for a few ornithologists, it was not until the mid-1970's that crane-watching became popular. During the last 10 years, this interest has become a multi-million dollar tourist industry that attracts people from around the globe who seek to witness this vernal spectacle of half a million cranes. More than half of the former riverine habitat has been abandoned by the cranes, largely because of irrigation and hydropower projects that drain the river and enable forests to …
Social Preference Of Four Cross-Foster Reared Sandhill Cranes, Thomas A. Mahan, Brenda S. Simmers
Social Preference Of Four Cross-Foster Reared Sandhill Cranes, Thomas A. Mahan, Brenda S. Simmers
Proceedings of the North American Crane Workshop
Four greater sandhill cranes (Grus canadensis tabida) were hatched and reared individually by 4 non-sandhill crane pairs: 2 by white-naped crane (G. vipio) pairs, 1 by a Siberian crane (G. leucogeranus) pair, and 1 by a red-crowned crane (G. japonensis) pair. After 1 year the sandhill cranes (2 male and 2 female) were placed in enclosed pens adjacent to an oppositesexed, same-age bird of the foster species on 1 side and an opposite-sexed, same-age conspecific on the other side. Data were collected throughout 1 year and included proximity between test and choice …
Sexual Size Dimorphism And Size Indices Of Six Species Of Captive Cranes At The International Crane Foundation, Scott R. Swengel
Sexual Size Dimorphism And Size Indices Of Six Species Of Captive Cranes At The International Crane Foundation, Scott R. Swengel
Proceedings of the North American Crane Workshop
Sexual size dimorphism and size indices in captive cranes were studied to learn dimorphism patterns and size relationships that could be used in the management of captive cranes. In 6 species of captive cranes. Siberian (Grus leucogeranus), eastern sarus (G. antigone sharpir), white-naped (G. vipio), common (G. grus), hooded (G. monacha), and red-crowned (G. japonensis), maIes averaged 14.5-28.5% heavier than femaIes (P < 0.05) in all species. MaIes had longer culmens, tarsi, and wing chords in all species. MaIes had significantly longer culmens (P < 0.05) in 4 of 6 species and had significantly longer tarsi than females (P < 0.05) in 3 of 6 species. Culmen and tarsus lengths both averaged 7% longer in males than females when the 6 species were combined. Wing chord length was not significantly dimorphic (P > 0.05) in any of the 4 species measured (Siberian, white-naped, hooded, and red-crowned cranes), averaging only 1.3 -3.3 % longer in males than in females. Body …