The Sandhill Crane Problem
نویسندگان
چکیده
منابع مشابه
Feather mites of the greater sandhill crane.
New taxa are described from Grus canadensis tabida: Brephosceles petersoni sp. n. (Alloptidae); Pseudogabucinia reticulata sp. n. (Kramerellidae); Geranolichus canadensis sp. n., and Gruolichus wodashae, gen. et sp. n. (Pterolichidae). Observations on resource partitioning by these mites are given.
متن کاملThe Appendicular Myology of the Sandhill Crane, with Comparative Remarks on the Whooping Crane
U NTIL recently, very little had been published on the myology of the cranes. Fisher and Goodman (1955) d escribed in detail the myology of the Whooping Crane (Grus americana) ; they also dissected one Little Brown Crane (G. c. canadensis) . I began a myological study of the Sandhill Crane (G. canadensis tabida) at the suggestion of Dr. L. H. Walkinshaw, whose interest in the biology and taxono...
متن کاملUtility of Vocal Formant Spacing for Monitoring Sandhill Crane Subspecies
Three migratory subspecies of sandhill crane (Grus canadensis) occur in North America: greater (G. c. tabida), Canadian (G. c. rowani), and lesser (G. c. canadensis). These subspecies vary clinally in size from the large tabida to the small canadensis. All 3 subspecies co-occur during the nonbreeding season, but field identification is challenging and census efforts typically do not even attemp...
متن کاملSandhill Crane Abundance and Nesting Ecology at Grays Lake, Idaho
We examined population size and factors influencing nest survival of greater sandhill cranes (Grus canadensis tabida) at Grays Lake National Wildlife Refuge, Idaho, USA, during 1997–2000. Average local population of cranes from late April to early May, 1998–2000, was 735 cranes, 34% higher than that reported for May 1970–1971. We estimated 228 (SE 1⁄4 30) nests in the basin core (excluding rene...
متن کاملTrends in Sandhill Crane Numbers in Eastern New Mexico
Following a 1980s decline in the number of cranes in the Bitter Lake National Wildlife Refuge area of the Pecos River Valley in eastern New Mexico, peak fall migration numbers increased from 5,640 in 1989-90 to 15,790 in 2003-04 and 13,650 in 2004-05. Concurrently, hectares of corn grown for silage to feed dairy cows increased from 1,781 in 1989 to 8,013 in 2003 and 7,325 in 2004. The populatio...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Blue Jay
سال: 1960
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay2177