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The effect of size-dependent growth and environmental factors on animal size variability
Theoretical Population Biology, 2007The origin of variation in animal growth rate and body size is not well understood but central to ecological and evolutionary processes. We develop a relationship that predicts the change in relative body size variation within a cohort will be approximately equal to the relative change in mean per unit size growth rate, when only size-dependent factors
Peacor, Scott D. +2 more
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Body Sizes of Animal Predators and Animal Prey in Food Webs
The Journal of Animal Ecology, 1993Summary 1. We measured the body sizes (weights or lengths) of animal species found in the food webs of natural communities. In c. 90% of the feeding links among the animal species with known sizes, a larger predator consumes a smaller prey. 2. Larger predators eat prey with a wider range of body sizes than do smaller predators.
Joel E. Cohen +3 more
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Influence of body size in animals on health and disease
Veterinary Record, 1983A great many properties of animals vary in a consistent way with bodyweight (W), for example, rates of production and consumption vary with W 3/4 and the time-spans of biological processes vary with W 1/4. These quite robust principles enable prediction of many aspects of an animal's biology and are established as important practical tools in the ...
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The group-size effect in non-feeding animals
Behavioural Processes, 2003A reduction in individual vigilance with an increase in group size is one of the most frequently reported relationships in animal behaviour, yet the reasons for it remain unclear. A key issue is whether the group-size effect is better explained by the detection (or ‘many eyes’) hypothesis, modelled by Pulliam’s (1973) influential paper, or by risk ...
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On the Optimal Size for Exploited Natural Animal Populations
Operations Research, 1973This paper considers natural animal populations whose members are harvested for their own value, either esthetic or monetary. At the time of the harvest, population members are assumed to be indistinguishable as to sex. Revenue and cost structures are defined for these populations as they relate to the ecosystem. A stochastic description of population
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[Territoriality in aquatic animals and their sizes].
Izvestiia Akademii nauk. Seriia biologicheskaia, 2003The concept of territoriality proposed by E. Odum was used in this study. The territories were determined that were occupied by individuals of specific animal species and the notion "territory of individual" was proposed. The territories of individuals for different representatives of aquatic animals, including fish, were calculated and their ...
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Does Size Matter? Animal Units and Animal Unit Months
Rangelands, 2017The concepts of animal units, animal unit months, and animal unit equivalents have long been used as standards for range management planning, estimating stocking rates, reporting actual use, assessing grazing fees, ranch appraisal, and other purposes.
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Offspring Size in Marine Animals
The Bulletin of the Ecological Society of America, 2015Anna B. Neuheimer +7 more
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