Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"First feeding"”.
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Water quality requirements for first-feeding in marine fish larvae of the Cape of Good Hope, with description of developmental stages
… and CO₂ was investigated using the decrease in first-feeding incidence following a 24-h exposure as the criterion of response. Ten species, all hatched from pelagic eggs collected at sea, were used in the studies: two soleids (Heteromycteris, Synaptura), a cynoglossid (Trulla), a gadid …
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An assessment of the suitability of the galjoen, Coracinus capensis cuvier, for mariculture in South Africa
… a short time to irreversible starvation, with first-feeding beginning from 110 hours after hatching at 18°C. Galjoen larvae proved to be extremely difficult to rear. Although successful first-feeding on a few live food organisms was observed, mass mortality at 4-8 days and again at 12-15 days …
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Use of the Relative Dose Response Assay to Determine the Vitamin A Status of Neonatal Calves: Effects of Season on Colostrum Quality and Immunological Parameters
… 11 calves. Blood samples were obtained prior to feeding colostrum at 0, 12, and 24 h, with Oh being the first feeding of colostrum. Blood samples also were obtained at 5, 6, 7, 8, 17, 18, 19, 20, and 22 h after the first colostrum feeding. Blood plasma, liver, and colostrum samples were analyzed …
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Incorporación de vitamina C en dietas larvarias y su implicación en el desarrollo de Solea senegalensis
… allowed the replacement of rotifers during the first feeding stage of sole and enabled a nutritional study to be conducted. Ascorbyl palmitate is a source of vitamin C available for the first larval stages of sole. The nutritional study performed as part of this thesis revealed the important …
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Determinants of Growth and Survival of Larval Pallid Sturgeon: A Combined Laboratory and Field Approach
… the transition from endogenous to exogenous feeding in pallid sturgeon and quantified prey taxa-specific growth and survival for zooplankton and Chironomidae and Ephemeroptera larvae in discrete pallid sturgeon size classes (first feeding larvae, 20 to 30 mm, 30 to 40 mm). We quantified …
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Evaluation of the biological feasibility of white stumpnose, Rhabdosargus globiceps, as a potential aquaculture candidate in South Africa
… temperature of Rhabdosargus globiceps. In the first larval rearing experiment the stages of development from egg to 30 DPH larvae were recorded at 20°C and showed similar developmental stages as other sea bream aquaculture species. The developmental stages were noted as being highly influenced …
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Evaluating the Use of Modified Corn Distillers Grains as a Fish-meal Protein Replacement in Yellow Perch Perca flavescens
… profile. Two Yellow Perch (Perca flavescens) feeding trials evaluated the performance of HP-DG against a fish meal (positive) control and an unconverted DG (negative) control. The first feeding trial evaluated HP-DG’s produced through different processing methods including: fermentation, …
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Circulation of the Western Antarctic Peninsula: Implications for Biological Production
… in these regions through development to the first feeding stage (calyptopis I). These results suggest that wAP Antarctic krill populations along the outer and mid shelf may be dependent on inputs from upstream sources. Maintenance of populations confined to the inner shelf regions may be …
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A Comparison of Olfactory Organ Development and Feeding Behavior in Larval Fathead Minnows, Pimephales promelas Rafinesque
… of the olfactory organ in conjunction with feeding behavior was investigated in larval fathead minnows during the first fifteen days posthatching. Larvae were presented with dead food organisms in the dark in order to isolate the use of chemoreception in feeding. Immediately following the …
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The Effect of Acute Low pH on Feeding and Locomotor Activity of Larval Fathead Minnows, Pimephales promelas
… reproductive success, changes in locomotor and feeding behavior and even death. Juveniles and adults have been the primary focus of research. However, the larval stage is potentially the most sensitive to toxicity. It is also important ontogenetically as several crucial development thresholds, …
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Influence of Season on Immunoglobulin Absorption and Status in Young Calves
… most critical period for calf survival is the first 2 to 3 wk of life. During this time, the calf depends upon colostral immunoglobulins absorbed during the first 24 h of life for protection against pathogenic microorganisms. Antigenic stimulation after birth activates the calf's own immune …
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Utilization of Soybean Products as Fish-Meal Protein Replacements in Yellow Perch Perca flavescens Feeds
… and incorporated into three Yellow Perch feeding trials. The first feeding trial was completed to measure apparent digestibility of protein and energy of commercial and experimental bioprocessed soybean meal (BP-SBM), and other common feed protein ingredients. Bioprocessing consistently …
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Patterns of variation in the benthic macroinvertebrate community of the Upper Columbia River, WA
… high mortality rates at the onset of exogenous feeding, leading to chronic larval recruitment failure. To determine the potential suitability of the BMI community as a prey source in this crucial stage of development, I explored seasonal, annual and zonal differences in BMI density, biomass, …
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An Ecological Approach to Feed Management in Fish Rearing Ponds
… using three different rates of feed addition (no feeding, 1%, or 3% body-weight/day, BW/d). Ponds in the 3% BW/d treatment had low dissolved oxygen (DO) concentrations and their surface became covered by filamentous green algae. Further, the feed did not enhance or support production of live prey …
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Preventive Measures in Aquaculture: Isolation, Application and Effects of Probiotics on Atlantic cod (Gadus morhua L.) Rearing at Early Stages
… of Atlantic cod (Gadus morhua L.) rearing. The first part of the study was designed to search for probiotics to target this critical period in cod rearing. Potential probionts were selected from the natural microbiota of cod larviculture at an experimental station in Iceland, based on several in …
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Hatchdate distributions and growth rates of anchovy (Engraulis encrasicolus) in the Southern Benguela ecosystem
… thus seemed to be at a later stage than the first-feeding stage. Mean larval growth rates were estimated between 0.33 and 0.36 mm SL.day-1 using three different growth functions (linear r2 = 0.90, Laird-Gompertz r2= 0.90, and von Bertalanffy r2 = 0.89 growth functions). Juvenile growth rates …
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A study of holding conditions, feed ration, and algal foods for the captive care of freshwater mussels
… mussels in captivity. Filtration rate in the first feeding hour was highest in ration B (1.0 mg dry wt L⁻¹) and lowest in ration C (3.4 mg dry wt L⁻¹). After 1 h, filtration rates declined in ration B but increased in rations C and A. <i>V.iris</i> likely achieved gut satiation in the first …
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Changes in midgut gland morphology and digestive enzyme activities associated with development in early stages of the American lobster Homarus americanus
… digestive capabilities prior to ingestion of the first meal. Changes in digestive enzyme activities during early development correlate well with the morphological changes observed in the midgut gland. Activities of protease, lipase, and amylase are very low in the well-advanced embryo and increase …
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Performance of Nile Tilapia and Yellow Perch Fed Diets Containing Distillers Dried Grain with Solubles and Extruded Diet Characteristics
… and yeast cultures in aquaculture diets, three feeding trials were performed that incorporated these constituents into diets fed to Nile tilapia Oreochromis niloticus and yellow perch Perca flavescens. However, before performing these feeding trials, a literature review was conducted to evaluate …