The behaviors of the alfalfa leaf cutter bee - seed
production system under imposition of several management
regimes were studied through the use of a simulation
model that contains mechanisms for the following
processes: 1) immature bee development and diapause; 2)
immature bee mortality; 3) female bee emergence; 4)
nesting...
Loss of early instar Douglas-fir tussock moth (Orgyia pseudotsugata McDunnough) (DFTM) has been found to constitute 66-92% of intra-generation mortality and to be a key factor in inter-generation population change. This death has been attributed to dispersal and to arthropod predation, two factors previously judged more important to an endemic...
Interactions between Bacillus sphaericus and Bacillus
thuringiensis israelensis (Bti), persistence of insecticidal
activity in the mosquito habitat, and suitability of enzyme-linked
immunoabsorbent assay (ELISA) for detecting and
quantifying bacterial endotoxin in the mosquito habitat were
investigated. Interactions between the two bacterial
species were examined by laboratory and field bioassays with...
I. Frozen bovine semen samples were measured by flow cytometry
(FCM) to determine if FCM analyses could be useful for sperm quality
evaluation and prediction of bull fertility. Fluorescent dyes
utilized were acridine orange, to measure sperm nuclear chromatin
heterogeneity by quantifying susceptibility of the chromatin to
denaturation, and rhodamine...
Studies were conducted to determine the effects of cyclopropenoid
fatty acids (CPFA) on the microsomal membrane of livers of rainbow
trout (Salmo gairdneri). Slab and tube gel electrophoresis of
microsomes from trout fed a CPFA diet (CPFA-microsomes) for varying
time periods showed a decrease in the number of protein bands...
Cyclopropenoid fatty acids (CPFA) are unique compounds that
contain a highly strained and reactive cyclopropene ring structure.
These compounds have been shown to cause a number of toxic effects
in a variety of animals. Rainbow trout (Salmo gairdneri) have
proven to be particularly sensitive to CPFA. Studies have revealed
that...
Cyclopropenoid fatty acids (CPFA), which are a group of
fatty acids produced by plants of the order Malvales, are known
to induce adverse physiological effects when administered to a
variety of animal species. A structurally strained cyclopropene
ring is present in all CPFA and is believed responsible for the
toxic...
The DNA repair capabilities of rainbow trout (Salmo gairdneri)
were studied vising the method of autoradiography. Trout were fed a
semi-purified control diet containing 0 ppm, 50 ppm, or 300 ppm
cyclopropenoid fatty acids (CPFA) for 6-9 weeks. Liver slices were
prepared and exposed in vitro to a control treatment,...