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Full-Text Articles in Population Biology

Differential Bait Preference And Rate Of Attraction By Argentine Ants (Linepithema Humile Mayr) At Freshwater And Saltwater Marsh Sites In Southern California, Victor D. Carmona Dec 2012

Differential Bait Preference And Rate Of Attraction By Argentine Ants (Linepithema Humile Mayr) At Freshwater And Saltwater Marsh Sites In Southern California, Victor D. Carmona

Victor D. Carmona-Galindo

Ants are a type of foraging insect species which harvests food resources based on availability. When ants locate food resources that are scarce within their habitat, they tend to be more strongly attracted to that food resource. This study used protein, carbohydrate and control based baits to examine if there was a deficiency in resources demonstrated by the ants at two different wetland habitats. We sampled Argentine ants (Linepithema humile Mayr) within the saltwater and freshwater marshes of Ballona Wetlands in Los Angeles, CA. We found significant differences in the rapid deployment of Argentine ants towards protein baits over carbohydrate …


The Impact Of Invasive Species Management Strategies On The Population Dynamics Of Castor Bean (Ricinus Communis L., Euphorbiaceae) At Two Southern California Costal Habitats, Victor D. Carmona Dec 2012

The Impact Of Invasive Species Management Strategies On The Population Dynamics Of Castor Bean (Ricinus Communis L., Euphorbiaceae) At Two Southern California Costal Habitats, Victor D. Carmona

Victor D. Carmona-Galindo

The diverse uses of Ricinus communis L. (Castor bean) in herbalism, agriculture, and horticulture have facilitated the worldwide dispersal of this r-selected species. Management strategies to eradicate R. communis in southern California have largely relied on manual labor, which in turn is limited by budget. This study assesses how two different invasive species management strategies in southern California impact the survivorship and fecundity of naturalized R. communis populations. Our findings suggest that documenting patterns of survival and reproduction serve as a tool for the adaptive management of invasive species eradication efforts.