Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Daryl J. Boness"'
Autor:
Michael K. Schwartz, Daryl J. Boness
Publikováno v:
Marine Mammal Science. 33:7-11
Publikováno v:
Canadian Journal of Zoology. 90:849-860
We examined age-related changes and consistency in physical and behavioural traits of 20 male grey seals ( Halichoerus grypus (Fabricius, 1791)) and implications for a proxy of mating success (number of oestrous females attended) over four successive
Publikováno v:
Marine Mammal Science. 27:E153-E164
Wecomparedthebehaviorsofprimiparousandmultiparousgrayseal(Halichoerus grypus) females over the course of lactation to examine whether poorly developed maternal behaviors may play a role in the reduced lactation performance observed in primiparous fem
Publikováno v:
Canadian Journal of Zoology. 86:610-622
At the Gannet Islands, Labrador, sympatric thick-billed murres ( Uria lomvia (L., 1758)) and razorbills ( Alca torda L., 1758) are slightly sexually dimorphic and have similar intersexual differences in parental roles; females are the main meal provi
Publikováno v:
Hormones and Behavior. 53:241-248
Studies on primates and other taxa have shown that the physiological response of an individual to stress reflects their social status. We combined behavioral observations with measures of stress to test the hypothesis that stress is an important phys
Publikováno v:
Behavioral Ecology and Sociobiology. 61:119-130
Our best understanding of marine mammal mating systems comes from land-mating pinnipeds. Logistical problems of observing behavior at sea have limited our ability to make inferences about species with aquatic-mating systems, which comprise over half
Publikováno v:
Journal of Animal Ecology. 75:408-420
Summary 1 We studied feeding frequency in free-ranging grey seals using stomach temperature telemetry to test if previously reported sex differences in the diving, movement and diet were reflected in the temporal pattern of foraging success. 2 Data w
Parental roles of male and female thick-billed murres and razorbills at the Gannet Islands, Labrador
Publikováno v:
Behaviour. 143:451-481
We studied female and male parental roles in two sympatric auks, thick-billed murre (Uria lomvia) and razorbill (Alca torda), with initial biparental care at the breeding site and later exclusively paternal care at sea. Our study addressed the follow
Publikováno v:
Behavioral Ecology. 16:541-549
The purpose of this study was to examine the importance of body size and body composition as determinants of conditional mating tactics exhibited in male grey seals. We combined behavioral observations with measures of energy expenditure and success
Publikováno v:
Animal Behaviour. 69:197-208
Theoretical models predict that in species with obligate biparental care, individuals will partially compensate for decreased parental effort by their partners as a stable evolutionary strategy. Full compensation may occur when breeding success is an