Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Ralph D. Morris"'
Autor:
Jeremy J. Hatch, Kevin M. Brown, Geoffrey G. Hogan, Ralph D. Morris, Jaume Orta, Ernest Garcia, Francesc Jutglar, Guy M. Kirwan, Peter F. D. Boesman
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f199b708570138ce826509edc83341cf
https://doi.org/10.2173/bow.grecor.01
https://doi.org/10.2173/bow.grecor.01
Publikováno v:
Waterbirds. 35:194-207
The status of Common Terns (Sterna hirundo) breeding in Canada is presented, with abundance trends in regions where data allow. Large (>12,000 pairs) concentrations of Common Terns nested in coastal Newfoundland, long the Gulf of St. Lawrence coast o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::866d1d5b7f0e217c7871e4bbaa9c4cd8
https://doi.org/10.1675/063.035.0202
https://doi.org/10.1675/063.035.0202
Autor:
Cynthia Pekarik, Ralph D. Morris, Francesca J. Cuthbert, David J. Moore, D. Vaughn Weseloh, Linda R. Wires
Publikováno v:
Waterbirds. 34:202-212
After near extirpation in the early 20th century, Ring-billed Gulls (Larus delawarensis) are currently (2009) the most abundant colonial waterbird nesting on the Great Lakes. Nest count data are reported from four decadal censuses (1976–2009) condu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98256d4afcd4306936cce0a6f3cc4dc8
https://doi.org/10.1675/063.034.0209
https://doi.org/10.1675/063.034.0209
Autor:
L. Harper, Ralph D. Morris, Linda R. Wires, D. Vaughn Weseloh, Cynthia Pekarik, Francesca J. Cuthbert
Publikováno v:
Journal of Great Lakes Research. 36:44-56
Canadian and US federal wildlife agencies completed three surveys (1976–1980, 1989–1991, and 1997–2000) to census colonial waterbirds breeding on the Great Lakes. We here summarize and comment on nest numbers and colony site distribution of com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c0369925e5455829dcd8de39ea94eb6
https://doi.org/10.1016/j.jglr.2009.09.008
https://doi.org/10.1016/j.jglr.2009.09.008
Autor:
David A. Wiggins, Ralph D. Morris
Publikováno v:
Ibis. 129:533-540
Parental care activities of male and female Common Terns Sterna hirundo were recorded over two breeding seasons. Males and females exhibited distinct parental roles throughout a breeding bout. Courtship feeding by males was extensive prior to and dur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21d958b6cb483385dacf6799310b0d30
https://doi.org/10.1111/j.1474-919x.1987.tb08241.x
https://doi.org/10.1111/j.1474-919x.1987.tb08241.x
Autor:
Ralph D. Morris, John W. Chardine
Publikováno v:
Ibis. 128:278-282
Investigators often find it necessary to determine the volumes of bird eggs (Hoyt 1979). As direct measurement is usually difficult under field conditions, volume is usually calculated from length and breadth measurements of eggs (e.g., Coulson 1963,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0490b0b2a7583becdb24701d38a3b453
https://doi.org/10.1111/j.1474-919x.1986.tb02675.x
https://doi.org/10.1111/j.1474-919x.1986.tb02675.x
Autor:
Ralph D. Morris, John W. Chardine
Publikováno v:
Ibis. 125:389-396
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83f1b46102c9287c22a21cd6c18a7fc2
https://doi.org/10.1111/j.1474-919x.1983.tb03128.x
https://doi.org/10.1111/j.1474-919x.1983.tb03128.x
Autor:
Ralph D. Morris, David J. Moore
Publikováno v:
Waterbirds. 28:458-467
The Common Tern (Sterna hirundo) rarely produces more than one brood per breeding cycle. In 1996, 18 of 365 pairs (5%) of Common Terns nesting at a Lake Ontario colony laid second clutches while caring for first-brood nestlings; no second clutches we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11b9edff87898e94e85df1f3eb77a193
https://doi.org/10.1675/1524-4695(2005)28[458:tposci]2.0.co
https://doi.org/10.1675/1524-4695(2005)28[458:tposci]2.0.co