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BIOLOGICAL INTEGRITY
"... “As the wind howled outside my window, heralding the onset of winter, the local band of coyotes sang their evening chorus as they roamed the rich hunting grounds where the wet meadow and ..."
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“As the wind howled outside my window, heralding the onset of winter, the local band of coyotes sang their evening chorus as they roamed the rich hunting grounds where the wet meadow and
Pyle: Age determination and molt strategies in North American alcids 219 Marine Ornithology 37: 219–225 (2009) AGE DETERMINATION AND MOLT STRATEGIES IN NORTH AMERICAN ALCIDS
, 2009
"... I examined 3442 specimens and measured the width of the premaxillary process at the gape (“gape width”) in 2245 specimens to determine age and to trace molt patterns in 20 species of North American alcids during the first, second and definitive cycles. Gape width became significantly wider with age ..."
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I examined 3442 specimens and measured the width of the premaxillary process at the gape (“gape width”) in 2245 specimens to determine age and to trace molt patterns in 20 species of North American alcids during the first, second and definitive cycles. Gape width became significantly wider with age in specimens of all 20 species; 95 % confidence intervals are presented as a preliminary guide to help age carcasses and live alcids in the hand. In order to trace presumed homologous molts across alcid taxa, results on molt are presented using standardized nomenclature. Terminology for first prebasic molts relative to the natal grounds in murres, razorbills and Synthliboramphus murrelets are proposed, nomenclature for the divergent molts of puffins are clarified and ornamental plumes in certain murrelets and auklets are considered basic rather than “breeding ” or alternate feathers. Guidelines are presented for the sampling of up to three generations of feathers from a single individual in studies using stable isotopes, and in turn, the use of isotopes to study molt patterns is encouraged. I suggest that ancestral alcids exhibited a Complex Alternate Strategy (as do many other Charadriiformes) and that, over time, inserted molts have been lost or merged in certain species because of physical and environmental constraints. Key words: Alcidae, gape width, sampling guidelines, molt terminology, museum specimens
Habitat Use by Brood-Rearing Waterfowl in Subarctic Québec
, 1995
"... ABSTRACT. Aerial surveys of waterfowl were conducted in subarctic Québec in 1989 and 1990 on randomly selected 100 km2 plots. We used logistic regression for modelling relationships between the presence of waterfowl broods and habitat characteristics. For each species, models of habitat use were gen ..."
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ABSTRACT. Aerial surveys of waterfowl were conducted in subarctic Québec in 1989 and 1990 on randomly selected 100 km2 plots. We used logistic regression for modelling relationships between the presence of waterfowl broods and habitat characteristics. For each species, models of habitat use were generated with one data set and tested with two others. We also compared the frequency distributions of broods of each species in different habitat types. Correct-classification rates of models varied between 0.53 and 0.77. Sensitivity of models generally increased when applied to validation data sets. Models showed that green-winged teals (Anas crecca) avoided lakes> 501 ha and used vegetated lakes, ponds and fens or bogs more than predicted by their availability. Black scoters (Melanitta nigra) and surf scoters (M. perspicillata) were found mostly on small lakes (< 10 ha) and medium lakes (10 –100 ha). Black scoters were associated with the presence of ponds and lakes with sedge and grass, whereas surf scoters were not. The presence of scaup (Aythia spp.) broods was associated with the presence of vegetation. Green-winged teals were observed more often on bogs than were either scoters or scaups. Black scoters were observed more often on ponds and less often on medium-sized lakes than surf scoters and scaups. The latter differed in their use of lakes < 10 ha: surf scoters, like black scoters, mostly used unvegetated lakes, while scaups and green-winged teals mostly used vegetated lakes. The accuracy and precision of logistic models may be enhanced by additional habitat variables, careful selection of sample-cell size and further investigation of the breeding biology of the surveyed species. Key words: habitat, model, logistic regression, northern Québec, black scoter, surf scoter, green-winged teal, scaup, brood
Amended General Plan/FEIR
, 2005
"... The Mission of the California Department of Parks and Recreation is to provide for the health, inspiration, and education of the people of California by helping to preserve the state’s extraordinary biological diversity, protecting its most valued natural and cultural resources, and creating opportu ..."
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The Mission of the California Department of Parks and Recreation is to provide for the health, inspiration, and education of the people of California by helping to preserve the state’s extraordinary biological diversity, protecting its most valued natural and cultural resources, and creating opportunities for high-quality outdoor recreation. General Plan Inquires: For general information regarding this document, or to request additional copies, please contact The Forest of Nisene Marks General Planning Team at one of the following locations:
Principal Investigator
"... The opinions, findings, conclusions, or recommendations expressed in this report are those of the authors and do not necessarily reflect the views of the Minerals Management Service, nor does the mention of trade names of commercial products constitute endorsement or recommendation for use by the Fe ..."
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The opinions, findings, conclusions, or recommendations expressed in this report are those of the authors and do not necessarily reflect the views of the Minerals Management Service, nor does the mention of trade names of commercial products constitute endorsement or recommendation for use by the Federal Government. Migration of King and Common Eiders Past
Fish Resources of Arctic Alaska Arctic Fish Occurrence in Coastal and Marine Waters of the Alaskan Chukchi and
, 2006
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Canadian Canadian Cataloquing Cataloquing in in Publication Publication Data
, 1996
"... i “Wildlife Working Reports frequently contain preliminary data, so conclusions based on these may be subject to change. Working Reports receive limited review. They may be cited in publications, but their manuscript status should be noted. Copies may be obtained, depending upon supply, from the Min ..."
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i “Wildlife Working Reports frequently contain preliminary data, so conclusions based on these may be subject to change. Working Reports receive limited review. They may be cited in publications, but their manuscript status should be noted. Copies may be obtained, depending upon supply, from the Ministry of Environment, Lands
Habitat Evaluation Procedures Group Western Energy and Land Use Team
, 1983
"... Washington,DC 20240This report should be cited as: ..."
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© The Neotropical Ornithological Society BREEDING BIOLOGY AND BEHAVIOR OF THE COLLARED FOREST-FALCON (MICRASTUR SEMITORQUATUS) IN
"... We studied Collared Forest-Falcons Micrastur semitorquatus in Tikal National Park, Guatemala from 1988 through 1993, documenting 9 nesting attempts. The Collared Forest-Falcon is a year-round resident, nesting in pre-existing cavities in large trees. Breeding commenced during the middle of the dry s ..."
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We studied Collared Forest-Falcons Micrastur semitorquatus in Tikal National Park, Guatemala from 1988 through 1993, documenting 9 nesting attempts. The Collared Forest-Falcon is a year-round resident, nesting in pre-existing cavities in large trees. Breeding commenced during the middle of the dry season. Egg laying occurred early March to early April, with laying peaking in early March and spanning 30 days (n = 8 clutches), with one exceptionally late laying date in May. The incubation period was 46–48 days at 1 nest and nestlings fledged on average at 50 days of age (n = 5). Only females incubated while males pro-vided food until the mid-nestling period when the females began hunting and delivering prey to the young. Young fledged in June, early in the rainy season and were not observed again at the cavity. Of 16 eggs laid in 8 nests (mean = 2.0), 10 of 16 (63%) hatched, and 8 (80%) of those hatchlings fledged. The only repro-ductive losses resulted from egg depredation (n = 2 nests). The breeding period of the Collared Forest-Falcon lasted approximately 28 weeks from courtship to fledgling dispersal, long in comparison to simi-larly-sized temperate raptors. Accepted 29 June 1999.
