Snow Geese in Massachusetts
نویسندگان
چکیده
منابع مشابه
Lead poisoning in Canada geese on Plum Island, Massachusetts.
During December 1983 and early January 1984, about 200 Canada geese (Branta canadensis) died of lead poisoning at Parker River National Wildlife Refuge on Plum Island, Massachusetts. In an effort to determine the source of lead, 100 bottom samples were taken from a refuge impoundment where much of the mortality/morbidity occurred. An average of 157,150 pellets/ha was found with a range of 64,58...
متن کاملBody size and age of recruitment in Snow Geese
'At what age to start breeding?' is a question fundamental to analysis of life histories. VVhile there has been considerable interest in the theoretical aspects of age of first breeding, comparatively little work has been done on the problems of estimating recruitment rates in wild populations. Most studies to date have relied on ad hoc methods that rely on one or more assumptions which may be ...
متن کاملBody Size and Fecundity in Lesser Snow Geese
Davies et al. (1988) concluded that body size did not directly influence annual fecundity in Lesser Snow Geese (Chen c. caerulescens, hereafter called Snow Geese). This disagrees with Ankney and Macinnes (1978) who showed that there was a positive correlation between culmen length and body mass in prelaying female Snow Geese, and that heavier females laid more eggs than did lighter females. A r...
متن کاملNeckband Retention for Lesser Snow Geese in the Western Arctic
Neckbands are commonly used in waterfowl studies (especially geese) to identify individuals for determination of movement and behavior and to estimate population parameters. Substantial neckband loss can adversely affect these research objectives and produce biased survival estimates. We used capture, recovery, and observation histories for lesser snow geese (Chen caerulescens caerulescens) ban...
متن کاملNutrient Reserves and Reproductive Performance of Female Lesser Snow Geese
--We studied the relation between nutrient reserves and reproductive performance of female Lesser Snow Geese (Chen caerulescens caerulescens) in 1971 and 1972 at the McConnell River (60ø50'N, 94ø25'W), Northwest Territories, Canada. We determined the potential clutch size of a pre-laying female by counting large (>20 mm), highly vascularized ovarian follicles; actual clutch size of post-laying ...
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ژورنال
عنوان ژورنال: The Auk
سال: 1909
ISSN: 0004-8038,1938-4254
DOI: 10.2307/4070292