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 20 of 23 for “"embryonic mortality"”.
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Patterns of embryonic mortality in mice after exposure to 137cs gamma irradiation
… were not significant in terms of inducing embryonic mortality. There was no significant difference in resorption percentage between the nine treatments. The second experiment was designed to measure the day of death of embryos placed into each of three treatments. The treatments consisted …
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The Effect of Spermatozoan Senescence on Embryonic Mortality in Rana Pipiens and Arbacia Punctulata
Made available in DSpace on 2014-12-10T17:37:50Z (GMT). No. of bitstreams: 1 6808099.pdf: 4709020 bytes, checksum: 3b79393b3bab060bfd12273c02a246cf (MD5) Previous issue date: 1967
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Synchronization of estrus, conception rate, and embryonic mortality in beef cattle following treatment with progesterone-releasing intravaginal devices or melengestrol acetate in conjunction with PGF₂α
… conception rates (CR), pregnancy rates (PR), and embryonic mortality (EM) after 25 d of gestation. Angus or Angus crossbred cattle (n=391) at two locations were assigned to receive either melengestrol acetate for 7 d (MGA-PGF; .5 mg/hd/d, n=136) or progesterone releasing intravaginal device for 7 …
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The use of antibiotics in the control of infertility in turkey populations
… controls, but had significantly higher early embryonic mortality than hens receiving antibiotic in water plus intravaginal infusion. In order to determine the duration of the effect of antibiotic treatment on the variables under study, the eggs were divided into two periods; one containing …
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Mathematical Modeling for Hatchability of Chicken Eggs
… failure to hatch, due to either infertility or embryonic mortality during incubation, is important to evaluate reproductive efficiency in poultry. The main objective of this thesis, therefore, was to develop or improve mathematical models that describe probabilities of fertility (the complement …
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Chemical, Toxicological, and Microbial Characterization of New Orleans Sediments Following Hurricane Katrina
… highest contaminant levels showed the highest embryonic mortality and most delayed development. However, no sediment caused an increased mutant frequency. When the most contaminated site was resampled in February, 2006 contaminant levels and toxicity decreased. During toxicity testing, …
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Lowered reproduction efficiency as a correlated response to selection for increased post-weaning gain in laboratory mice
… found for ovulation rate, fertilization rate, or embryonic mortality. Highly significant (P < .01) group differences were found for the number of days from introducing the male until a CP was observed. Group C plugged in an average of 3.39 days, whereas group S averaged 5.50 days. The number of …
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Isolation of Bacterial pathogens from dead- in- shell Chicken embryos from local Hatcheries
… on bacterial association with dead-in-shell mortality in hatcheries. Hence investigation into three commercial hatcheries of Zambia was made to find out the role of bacterial pathogens in embryonic mortality and hatchability. These hatcheries had an average dead -in-shell losses between 15.2% …
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Isolation of Bacterial pathogens from dead- in- shell Chicken embryos from local Hatcheries
… on bacterial association with dead-in-shell mortality in hatcheries. Hence investigation into three commercial hatcheries of Zambia was made to find out the role of bacterial pathogens in embryonic mortality and hatchability. These hatcheries had an average dead -in-shell losses between 15.2% …
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Dosimetric characterization of a miniature x-ray source for biophysics studies
… the Mini-X X-Ray beams on egg hatchability and embryonic mortality would be measured.
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Etude des facteurs écologiques et écotoxicologiques impliqués dans la réussite d’incubation chez la tortue luth, Dermochelys coriacea, de Guyane Française
… low hatching rate is largely a result of high embryonic mortality rather than infertility, but the specific causes remain unknown. Leatherbacks are vulnerable to excessive adult mortality (resulting in population decline) because they are long-lived species. However, low hatching success and …
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Mercury Bioaccumulation and Adverse Reproductive Effects in Snapping Turtles Inhabiting a Historically Contaminated River
… reference and contaminated sites and quantified embryonic morality, infertility, and hatching success of each clutch, and assessed all hatchlings and dead embryos for gross morphological malformations. I found that Hg exposure negatively influenced hatching success through increased egg …
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Separation of abnormal spermatozoa from semen produced by bulls with impaired testicular thermoregulation
… sperm to decreased fertility and increased embryonic mortality.
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Study the effect of eggs incubation parameter through development of new experimental rig for IKTA quails species
… but speed up hatching time, it may cause embryonic mortality to egg development. Overall, experimental rig produces 83.16% hatching with 360 ° rolling produced slightly higher hatching average at 83.33% compared to 83% with 45° swing.
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Study the effect of eggs incubation parameter through development of new experimental rig for IKTA quails species
… but speed up hatching time, it may cause embryonic mortality to egg development. Overall, experimental rig produces 83.16% hatching with 360 ° rolling produced slightly higher hatching average at 83.33% compared to 83% with 45° swing.
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Comparison of pregnancy rates, progesterone concentrations, and expression of genes associated with progesterone synthesis in heifers and mature cows
… in 2nd and 3rd parity cows, resulting in early embryonic mortality and reduced pregnancy rates.
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Lamb wastage and its association with ewe body condition
… There was significantly (P < 0.001) higher embryonic mortality up to scanning (23 & 19%, in 2002 & 2003 respectively) compared with losses from scanning to lambing (1 & 3%, in 2002 & 2003 respectively). There were highly significant (P < 0.001) differences between GR and LW of ewes at mating …
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Probabilistic Modelling of Replication Fidelity in Eukaryotic Genomes
… of organisms and this is confirmed by early embryonic mortality rates from different organisms. Good agreement of the biologically obtained data to the model predictions in all cases suggests our model efficiently captures the biological complexity involved in containing errors in the DNA …
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Die Bedeutung der Embryonenqualität im Rahmen des Embryotransfers beim Rind – eine Literaturstudie
… Chromosomal deviations are known to cause early embryonic mortality in cattle. Determination of the total cell number and the allocation of these cells to the inner cell mass (ICM) and trophectoderm (TE) after differential staining of these cells give more details on the quality of an embryo.
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Studies of behavioral and physiological bases of genetically controlled epileptiform seizures in domestic fowl
… of the epi gene had no effect on fertility, embryonic mortality and hatchability. The resting EEG of epileptic chickens was characterized by relatively slow waves with high amplitude as compared to the EEG of carriers and normals. Abnormal spiking waves with frequency identical to the …
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