The object of this study was to analyze the application of linear
programming techniques to ration formulation for feedlot lambs and
steers.
Three rations for feeder lambs were designed to study the application of linear programming techniques under varying ration constraints.
Rations studied were as follows:
iso-caloric rations with
three...
Chum salmon from different stocks were bred together in two experiments. Three stocks contributed gametes to one experiment, two stocks to another. Sibling groups of eggs, alevins, and fry were maintained in a common environment. Variability of development rates, rearing performance, susceptibility to disease, and behavioral traits was partitioned into...
To reduce the loss of feeding calves during the nursing period
and to conserve milk for human consumption research has been conducted
to develop milk replacer formulas which result in calf performance
comparable to that of milk. In the first section of this investigation
different aspects of utilization of fats,...
Two replications of a half dial lei cross experiment were performed among four inbred lines of mosquitofish, Gambusia affinis.
These inbred lines originated from three random-bred stocks: OR,
TX and CD. The experiment was conducted as a completely randomized
design. Experimental material consisted of parental lines and F₁ populations maintained...
Two experiments were conducted to evaluate supplementation methods and availability of selenium from environmental waste materials to grazing livestock as a potential means of waste recycling. One involved incorporation of wastes into salt for freechoice supplementation to the animals themselves, the second involved fertilizer amendments with wastes to grow Orchardgrass...
Tunisia, like many other countries in the world, suffers
from a shortage of feedstuffs and an overall nutrition problem
is facing the livestock industry. Large quantities of feeds
are imported to meet the animals' needs in energy and protein.
At the same time, considerable quantities of crop residues and
agro-industrial...
Three experimental grazing trials were conducted to
explore the hypothesis that in the Klamath Basin, a higher
level of selenium supplementation is necessary than those
proven adequate elsewhere. Two forage species were
investigated: Festuca arundinaeca and Agropyron repens, in
0.61 hectare plots, both grown in a selenium deficient soil
area....
Metabolic and performance parameters of beef calves were
compared between Se supplemented (Se) and control (C) dam
treatment groups from known Se deficient cattle. Four
trials were conducted at three locations involving 50,
36, 25 and 39 experimental dam/calf pairs. Se
supplementation was either two 30 gram oral boluses (90%...
This investigation explored the use of microcosms as a tool for
studying the dynamics of tropical aquaculture ponds. The potential use
of rabbit excreta as a pond fertilizer in integrated farming systems was
also investigated.
Twelve insulated fiber glass tanks were utilized as microcosms to
simulate earthen ponds. Seven hand-sexed...
The genotype frequencies of one-year-old oyster spat
(Crassostrea gigas) from parents of known genotype, are compared
to the frequencies expected with Mendelian inheritance. The genotypes
are characterized at three enzyme loci, Aspartate amino-transferase
(AAT), Phosphohexose isomerase (PHI) and Leucine
aminopeptidase (LAP), and a general protein locus. In this study
expression...