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  1. No Access

    Article

    Mating tactics and mating system of an aquatic-mating pinniped: the harbor seal, Phoca vitulina

    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-...

    Daryl J. Boness, W. Don Bowen, Birgit M. Buhleier… in Behavioral Ecology and Sociobiology (2006)

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    Article

    Sexual dimorphism in sea lion pups: differential maternal investment, or sex-specific differences in energy allocation?

    Proximal mechanisms underlying a faster growth rate in male compared to female California sea lion pups were investigated. Males are significantly larger at birth than females. Specifically, we asked if diffe...

    K. A. Ono, Daryl J. Boness in Behavioral Ecology and Sociobiology (1996)

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    Article

    Does male harassment of females contribute to reproductive synchrony in the grey seal by affecting maternal performance?

    We investigated the possibility that male harassment of lactating females differed in relation to time of birth in the grey seal, Halichoerus grypus, on Sable Island, Nova Scotia. This was done by comparing th...

    Daryl J. Boness, W.Don Bowen, Sara J. Iverson in Behavioral Ecology and Sociobiology (1995)

  4. No Access

    Chapter

    Determinants of mating systems in the Otariidae (Pinnipedia)

    Substantial advances have been made in the past two decades toward a theory of mating systems (Orians, 1969; Selander, 1972; Trivers, 1972; Jarman, 1974; Emlen and Oring, 1977; Bradbury and Vehrencamp, 1977; K...

    Daryl J. Boness in The Behaviour of Pinnipeds (1991)

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    Article

    Fostering behavior in Hawaiian monk seals: is there a reproductive cost?

    Fostering behavior has been reported in a large number of mammal and bird species although the relative frequency of its occurrence in most species is unknown. A commonly held view is that fostering is costly ...

    Daryl J. Boness in Behavioral Ecology and Sociobiology (1990)

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    Article

    The effect of a natural environmental disturbance on maternal investment and pup behavior in the California sea lion

    Observed changes in maternal investment due to an environmentally induced decrease in food supply (the 1983 El Niño-Southern Oscillation) are compared witha priori predictions for the California sea lion (Zalophu...

    Kathryn A. Ono, Daryl J. Boness, Olav T. Oftedal in Behavioral Ecology and Sociobiology (1987)

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    Article

    The effect of a natural environmental disturbance on maternal investment and pup behavior in the California sea lion

    Observed changes in maternal investment due to an environmentally induced decrease in food supply (the 1983 El Niño-Southern Oscillation) are compared witha priori predictions for the California sea lion (Zalophu...

    Kathryn A. Ono, Daryl J. Boness, Olav T. Oftedal in Behavioral Ecology and Sociobiology (1987)

  8. No Access

    Chapter

    The Behavior, Physiology, and Anatomy of Lactation in the Pinnipedia

    Lactation represents a major proportion of maternal reproductive effort. In ungulates the energetic costs of lactation comprise 75–80% of the total energetic costs of reproduction (Oftedal, 1985). Although pin...

    Olav T. Oftedal, Daryl J. Boness, Raymond A. Tedman in Current Mammalogy (1987)

  9. No Access

    Article

    What happens between an external stimulus and an overt response?

    Peripheral components of feedthrough loops were psychophysiologically measured from the brain, both forelimbs, the tongue and the eyes during simple and choice reaction time tasks using linguistic and non-ling...

    F. J. McGuigan, Daryl J. Boness in The Pavlovian Journal of Biological Scienc… (1975)