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Regulation of an Insect Population Under Biological-Control
(1995-01)
California red scale is suppressed to very low densities by the parasitoid Aphytis melinus. The system also appears stable. We report on an experimental test of the hypothesis that stability is caused by a refuge for scale. ...
Refuge dynamics and metapopulation dynamics: An experimental test
(1996-03)
Red scale, an insect pest of citrus, is under control by the parasitoid Aphytis melinus in many areas, and in our study area the interaction appears dynamically stable. The bark on the interior branches and trunk of trees ...
Estimation of Temporal Variability in Populations
(1995-10)
A common measure of the temporal variability of a population is the standard deviation of the logarithms of successive estimated population sizes, In(D-t). This measure overestimates true temporal variability (the standard ...
Methods for selecting fixed-effect models for heterogeneous codon evolution, with comments on their application to gene and genome data
(2007)
Background: Models of codon evolution have proven useful for investigating the strength and
direction of natural selection. In some cases, a priori biological knowledge has been used
successfully to model heterogeneous ...
Natural Selection, Variation, Adaptation, and Evolution: a Primer of Interrelated Concepts
(2010-11)
Natural selection is an elegantly simple concept but one that can manifest in complex ways. I review how the basic model of single-trait viability selection has been extended to more complex forms of selection on multiple ...
The Influence of Reproductive Experience on Milk Energy Output and Lactation Performance in the Grey Seal (Halichoerus grypus)
(2011-05)
Although evidence from domestic and laboratory species suggests that reproductive experience
plays a critical role in the development of aspects of lactation performance, whether reproductive
experience may have a significant ...
Sex-specific, seasonal foraging tactics of adult grey seals (Halichoerus grypus) revealed by state-space analysis
(2009-11)
In many large pelagic animals, observing behavior is limited to observation by radio or satellite telemetry. In many cases, discriminating different behaviors from telemetry data has been a key, but often elusive, goal. ...
Strong bottom-up and top-down control of early life stages of macroalgae
(2001-06)
In contrast to most pelagic primary producers, benthic macrophytes pass through morphologically distinct life stages, which can be subject to different ecological controls. Using factorial field experiments, we investigated ...
Rapid Global Expansion of Invertebrate Fisheries: Trends, Drivers, and Ecosystem Effects
(2011-03)
Background: Worldwide, finfish fisheries are receiving increasing assessment and regulation, slowly leading to more sustainable exploitation and rebuilding. In their wake, invertebrate fisheries are rapidly expanding with ...
Seasonal changes in buoyancy and diving behaviour of adult grey seals
(2000-08)
Phocid seals go through dramatic seasonal changes in body mass and composition as a result of
the spatial and temporal separation of foraging, reproduction and moulting. These changes in body
fat content and body mass ...