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Biochemical genetics of Heliothis and Helicoverpa (Lepidoptera: Noctuidae) and evidence for a founder event in Helicoverpa zea
TLDR
The results are consistent with a founder effect leading to the evolution of the species H. zea during colonization of the Americas by stray individuals of H. punctigera, and a new model for evolution in Helicoverpa is proposed. Expand
Genetic Analysis of Founder Bottlenecks in the Rare British Butterfly Plebejus argus
TLDR
Significant reductions in the numbers of rare allozyme alleles were found in descendent populations, presumably as a result of drift during colonization bottlenecks, and there was no evidence for any increase in fluctuating asymmetry among descendedent populations. Expand
The maintenance of species differences across a Heliconius hybrid zone
TLDR
Although analysis of population structure shows little evidence of interspecific gene flow, strong differences between allozyme loci in levels of divergence suggest that selection and gene flow may affect lociIn different ways. Expand
Ontogenetic Changes in the Resistance of Bullfrogs (Rana catesbeiana) to the Venom of Copperheads (Agkistrodon contortrix contortrix) and Cottonmouths (Agkistrodon piscivorus piscivorus)
TLDR
A population of bullfrogs introduced into California early this century and isolated from copperheads and cottonmouths since that time still had equivalent resistances as did those snakes from within the geographic range of the snakes; the LD50 to the venoms had not changed significantly. Expand
Effect of pest–management operations on the abundance and size–frequency distribution of the New Zealand endemic frog Leiopelma hochstetteri
TLDR
Investigation of the influence of a 7–year rat management operation on frog abundance in the Waitakere Ranges, New Zealand found that frog abundance was positively correlated with percentage area covered by boulders and percentage area under water, and the effects of the pest–management activities were evaluated. Expand
Status of Diamondback Terrapins (Malaclemys terrapin) in North Inlet–Winyah Bay, South Carolina
TLDR
Diamondback terrapin population dynamics in North Inlet–Winyah Bay, South Carolina, a relatively undeveloped salt marsh estuary, will provide data for population models and comparisons with threatened populations. Expand
Body size determines rates of seed dispersal by giant king crickets
TLDR
Results indicate that giant king crickets called weta are frequent seed dispersers of F. excorticata, although many seeds are destroyed during ingestion, larger-bodied weta consistently disperse greater quantities of seeds, which is unusual in seed dispersal mutualisms, and weta preferentially disperse larger seeds, suggesting that they might interact evolutionarily with New Zealand plants. Expand
Population parameters and life-table analysis of two coexisting freshwater turtles: are the Bellinger River turtle populations threatened?
Two species of freshwater turtle coexist in the Bellinger River: Elseya georgesi is common but limited to the Bellinger River, whereas Emydura macquarii is widespread but rare in the Bellinger River.Expand
Extensive protein and microsatellite variability in an isolated, cyclic ungulate population
TLDR
Investigation of polymorphism at protein and microsatellite DNA loci in an isolated, unmanaged and cyclic population of Soay sheep on the island of Hirta, St. Kilda finds high levels of protein heterozygosity, and discusses the potential application of micros Satellite markers to interpopulation and interspecific genetic studies. Expand
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