These experiments are part of a larger study designed to investigate the influence of husbandry parameters on the life history of the apple snail, Marisa cornuarietis. The overall objective of the program is to identify suitable husbandry conditions for maintaining multi-generation populations of this species in the laboratory for use in ecotoxicological testing. In this article, we focus on th...

One important step for the colonization of Ochlerotatus albifasciatus (Macquart) is to determine the optimal conditions for larval rearing, which makes possible the development of experiments comprising larval rearing in the laboratory. In this research the effect of diet composition on the development of O.albifasciatus was studied. For this purpose, cohorts of 20 first instars were reared usi...

Environmental change can simultaneously cause abiotic stress and alter biological communities, yet adaptation of natural populations to co-changing environmental factors is poorly understood. We studied adaptation to acid and predator stress in six moor frog (Rana arvalis) populations along an acidification gradient, where abundance of invertebrate predators increases with increasing acidity of...

Environ. Entomol. 21(3): 427-435 (1992) ABSTRACT Diploid males are known to occur in several braconid and ichneumonid species. These diploid males are the result of a single-locus, sex-determination mechanism. Heterozygotes at this sex locus develop into females, whereas homozvgotes (haploids) and homozygotes (diploids) develop into males. Diploid males have a low fertility and their frequency ...

Tupiocoris cucurbitaceus (Spinola) (Hemiptera: Miridae) is a predator of whiteflies Aleyrodidae) present in several American countries. Rearing this bug requires the use plants as ovipositional substrate and prey to feed on complete its development. Artemia sp. (Branchiopoda, Artemiidae) cyst, crustacean tested for laboratory rearing other hemipteran species, could be used food, being less expe...

Phytoseiulus persimilis Athias-Henriot is an important biocontrol agent for controlling spider mites (Tetranychus spp). Rearing P. relatively expensive due to the need raise (e.g. Tetranychus urticae Koch), as prey, on live plants. Frozen eggs of T. can be easily stored and used a potential feed laboratory rearing persimilis. This study investigated performance frozen compared with fresh food U...

For successful application of the sterile insect technique (SIT), wild female insects should not be more receptive to remating after mating with a mass-reared sterile male than after to mating with a wild fertile male. The remating frequencies of melon fly Bactrocera cucurbitae Coquillett (Diptera: Tephritidae) females were assessed in field cages with male melon flies from: (1) a male-only gen...

A series of experiments rearing the Caribbean spiny lobster (Panulirus argus) was conducted to improve the growth and survival rates of laboratory-reared lobsters for subsequent experimentation. Seventeen groups of animals consisting of 25 to 63 pueruli were collected with modified Ross Witham collectors over five years in the Florida Keys. Groups of lobsters were raised communally for up to fo...