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Optimal Foraging: Some Theoretical Explorations, Eric Charnov, Gordon H. Orians
Optimal Foraging: Some Theoretical Explorations, Eric Charnov, Gordon H. Orians
Biology Faculty & Staff Publications
This book had its genesis in a rather disorganized and poorly conceived lecture on optimal foraging theory that one of us (GHO) gave to an advanced ecology class during the winter of 1971.The deficiencies in that treatment, combined with the obvious potential of an improved conceptualization and analysis of the problem, led to the formation of a small seminar on optimal foraging theory attended by Charles Fowler, Nolan Pearson and ourselves. This seminar, which extended over two academic quarters, produced the basic fine-grained foraging models and some hints about wider applications of the results. We both found ourselves independently stimulated …
The Offspring-Size/Clutch-Size Trade-Off In Mammals., Eric Charnov, S.K.M. Ernest
The Offspring-Size/Clutch-Size Trade-Off In Mammals., Eric Charnov, S.K.M. Ernest
Biology Faculty & Staff Publications
The Smith-Fretwell model for optimal offspring size assumes the existence of an inverse proportional relationship (i.e., trade-off) between the number of offspring and the amount of resources invested in an individual offspring; virtually all of the many models derived from theirs make the same trade-off assumption. Over the last 30 years it has become apparent that the predicted proportionality is often not observed when evaluated across species. We develop a general allometric approach to correct for size-related differences in the resources available for reproduction. Using data on mammals, we demonstrate that the predicted inverse proportional relationship between number of offspring …
Maternal Condition And Facultative Sex Ratios In Populations With Overlapping Generations., L.E. Schwanz, J.G. Bragg, Eric Charnov
Maternal Condition And Facultative Sex Ratios In Populations With Overlapping Generations., L.E. Schwanz, J.G. Bragg, Eric Charnov
Biology Faculty & Staff Publications
Facultative investment in offspring sex is related to maternal condition in many organisms. In mammals, empirical support for condition-dependent sex allocation is equivocal, and there is some doubt as to theoretical expectations. Much theory has been developed to make predictions for condition-dependent sex ratios in populations with discrete generations. However, the extension of these predictions to populations with overlapping generations (OLGs; e.g., mammals) has been limited, leaving doubt as to the specific prediction for maternal-condition-dependent sex ratios in mammals. We develop a population genetics model that incorporates maternal effects on multiple offspring fitness components in a population with OLGs. Using …
Rdna Gene Region (18s-Its1-5.8s-Its2-28s) Of Biomphalaria Glabrata, Coen Adema
Rdna Gene Region (18s-Its1-5.8s-Its2-28s) Of Biomphalaria Glabrata, Coen Adema
Biomphalaria Genome Initiative
No abstract provided.