Publications
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Relative costs of prebasic and prealternate molts for male blue-winged teal Relative costs of prebasic and prealternate molts for male blue-winged teal
We compared masses of definitive basic and alternate plumages of male Blue-winged Teal (Anas discors) to evaluate the hypothesis that nutritional investments in basic and alternate plumages are related to the duration that plumages are worn and to assess the relative costs of prebasic and prealternate molts. Because these plumages are worn by males for approximately equal durations, we...
Authors
W.L. Hohman, S.W. Manley, D. Richard
Vertebrate herbivory in managed coastal wetlands: A manipulative experiment Vertebrate herbivory in managed coastal wetlands: A manipulative experiment
Structural marsh management and nutria herbivory are both believed to strongly influence plant production in the brackish, deltaic marshes of coastal Louisiana, USA. Previous studies have tested the effects of structural management on aboveground biomass after implementing management, but very few studies have collected data before and after management. Thus, to test the effects of...
Authors
L.A. Johnson, A.L. Foote
The effects of herbivory on neighbor interactions along a coastal marsh gradient The effects of herbivory on neighbor interactions along a coastal marsh gradient
Many current theories of community function are based on the assumption that disturbances such as herbivory act to reduce the importance of neighbor interactions among plants. In this study, we examined the effects of herbivory (primarily by nutria, Myocastor coypus) on neighbor interactions between three dominant grasses in three coastal marsh communities, fresh, oligohaline, and...
Authors
K.L. Taylor, J.B. Grace, B.D. Marx
Temperature effects on stocks and stability of a phytoplankton-zooplankton model and the dependence on light and nutrients Temperature effects on stocks and stability of a phytoplankton-zooplankton model and the dependence on light and nutrients
A model of a closed phytoplankton—zooplankton ecosystem was analyzed for effects of temperature on stocks and stability and the dependence of these effects on light and total nutrient concentration of the system. An analysis of the steady state equations showed that the effect of temperature on zooplankton and POM biomass was levelled when primary production is nutrient limited...
Authors
J. Norberg, D.L. DeAngelis
A rop net and removable walkway used to quantitatively sample fishes over wetland surfaces in the dwarf mangrove of the Southern Everglades A rop net and removable walkway used to quantitatively sample fishes over wetland surfaces in the dwarf mangrove of the Southern Everglades
We describe a 9 m2 drop net and removable walkways designed to quantify densities of small fishes in wetland habitats with low to moderate vegetation density. The method permits the collection of small, quantitative, discrete samples in ecologically sensitive areas by combining rapid net deployment from fixed sites with the carefully contained use of the fish toxicant rotenone. This...
Authors
J.J. Lorenz, C.C. McIvor, G.V.N. Powell, P. C. Frederick
Population viability analysis of the Florida manatee (Trichechus manatus latirostris), 1976-1991 Population viability analysis of the Florida manatee (Trichechus manatus latirostris), 1976-1991
Recent development of age-determination techniques for Florida manatees (Trichechus manatus latirostris) has permitted derivation of age-specific data on reproduction and survival of a sample of 1212 carcasses obtained throughout Florida from 1976–1991. Population viability analysis using these data projects a slightly negative growth rate (−0.003) and an unacceptably low probability of
Authors
M. Marmontel, S.R. Humphrey, T. J. O'Shea
Natural history notes: Scinella lateralis. (Ground Skink). Predation Natural history notes: Scinella lateralis. (Ground Skink). Predation
Abstract not supplied at this time
Authors
C.K. Dodd, Marian L. Griffey
Shell injuries and anomalies in an insular population of Florida box turtles (Terrapene carolina bauri) Shell injuries and anomalies in an insular population of Florida box turtles (Terrapene carolina bauri)
Abstract not supplied at this time
Authors
C.K. Dodd, R. Franz, S. A. Johnson
The interaction of spatial scale and predator-prey functional response The interaction of spatial scale and predator-prey functional response
Predator-prey models with a prey-dependent functional response have the property that the prey equilibrium value is determined only by predator characteristics. However, in observed natural systems (for instance, snail-periphyton interactions in streams) the equilibrium periphyton biomass has been shown experimentally to be influenced by both snail numbers and levels of available...
Authors
T.W. Blaine, D.L. DeAngelis
The effect of functional response on stability of a grazer population on a landscape The effect of functional response on stability of a grazer population on a landscape
The dynamics of interacting consumer and resource populations is one of the most thoroughly studied problems of theoretical population biology. Among the key results from the study of simple mathematical models of interacting populations is that the Holling Type 2 functional response tends to be unstable for a wide range of realistic parameters. Functional responses such as Holling Type...
Authors
A.D. Basset, D.L. DeAngelis, J.E. Diffendorfer