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Effect of dehydration on body-to-brain temperature difference in heat-stressed fowl (Gallus domesticus)
1. The effect of dehydration on body and hypothalamic temperatures was studied in fowls exposed to ambient temperatures from 26 to 42°C.
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Torpor und Nahrungsausnutzung bei 4 Mausvogelarten (Coliiformes)
The Speckled Mousebird (Colius striatus) , the Red-necked Mousebird (Colius castanotus) , the Blue-naped Mousebird (Urocolius macrourus) , and the...
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Energy Cost of Incubation to the Parent Seabird
Our knowledge of incubation energetics has increased dramatically in the last decade since King (1973) and Kendeigh (1963, 1973) first presented...
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The Plains Region and Experimental Sites
The northern Great Plains extend from the valley of the Platte River in Nebraska to well beyond the Canadian border and from the Rocky Mountains on...
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Foraging by Passerine birds and Anolis lizards on St. Eustatius (Neth. Antilles): implications for interclass competition, and predation
Observations of foraging and diet for eight Passerine bird, two Anolis lizard, and one Ameiva lizard species in dry sclerophyll scrub on St....
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Predation on earthworms by terrestrial vertebrates
The earthworm Lumbricus terrestris is widespread and abundant. Its biomass may reach 1000 kg ha −1, and > 20 worms m −2 may surface simultaneously at...
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Variation in Mate Fidelity in Monogamous Birds
Ornithologists recently have devoted considerable attention to avian mating systems. However, the primary focus of both theoretical papers and field...
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Size and structure of a South Carolina salt marsh avian community
Although birds are a conspicuous element in estuarine ecosystems, annual fluctuations in the size and structure of avian salt marsh communities have...
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Inadequacy of activity time as a niche difference: the case of diurnal and nocturnal raptors
It has been assumed that differences in activity time of diurnal (Falconiform) and nocturnal (Strigiform) raptors reduce competition for food by...
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Hunting in the kestrel, Falco tinnunculus, and the adaptive significance of daily habits
1. In an attempt to evaluate the importance of individual daily habits to a freeliving animal, foraging behaviour of kestrels was observed...
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Biogeography of birds in New Guinea
In New Guinea, birds, more than any other group of animals have excited the interest of explorers, collectors, scientists, amateur naturalists, and...
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Motivation: A New Perspective on Some Old Ideas
An interactive model of motivation is proposed, in which motivational states arise conjointly from internal states (e.g., energy level) and external...
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Brain temperature and therete mirabile ophthalmicum in the Zebra finch (Poephila guttata)
1. Brain and colonic temperatures were measured in five Zebra finches ( Poephila guttata ) with a mean body weight of 0.013 kg.
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Der Tagesgang der Körpertemperatur von Vögeln als Funktion des Körpergewichtes
In this review an attempt is made to relate the range of oscillation (=difference between daily maxima and minima) in the rhythm of body temperature...
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Named species and hosts of Sarcocystis (Protozoa: Apicomplexa: Sarcocystidae)
A list is given of the present 93 species of the apicomplexan protozoan genus Sarcocystis together with their definitive and intermediate hosts (if...
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The Jamaican Blackbird: A “Natural Experiment” for Hypotheses in Socioecology
The last twenty years have seen an unprecedented surge of new theory about evolutionary adaptations of social systems to different ecological...
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Radar observations of bird migration over the Western North Atlantic Ocean
1. During two fall migration seasons, a large number of flying targets were tracked by a radar mounted on an oceanographic research vessel....
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The Deciduous Forest
The deciduous forests occupy a very conspicuous portion of Europe, practically from latitude 40°N (Puglia, Albania) to 60°N (Scandinavia). They...
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The Connections Between Carabids and Biotic Factors in the Ecosystem
A consideration of the ways in which carabids are linked with biotic factors in their ecosystem involves three questions:...