Essays about: "semen"

Showing result 6 - 10 of 82 essays containing the word semen.

  1. 6. How does a beef x dairy calving affect the dairy cow’s following lactation period?

    University essay from SLU/Dept. of Animal Breeding and Genetics

    Author : Roberto Espinola Alfonso; [2022]
    Keywords : beef cattle; dairy cattle; crossbreeding; milk yield; fertility; survival;

    Abstract : In dairy x beef breeding, much of the research has focused on the performance of the crossbred calves, yet little focus has been given to the subsequent performance of the cow itself. This study aimed to evaluate the performance of dairy cows for milk yield, fertility, and survival traits after giving birth to crossbred calves, and to compare this to the performance of dairy cows after giving birth to purebred dairy calves. READ MORE

  3. 7. A New Beginning : With Male Hormonal Contraceptives

    University essay from Linnéuniversitetet/Institutionen för kemi och biomedicin (KOB)

    Author : Hannah Viktorsson; [2022]
    Keywords : Orala preventivmedel; testosteron enantat; testosteron; undekanoat; azoospermi;

    Abstract : The most common male contraception is the condom but due to misuse or to the minimizing effect of pleasure many couples use non-reliable methods, which can lead to unplanned pregnancies. A male hormonal contraception can reduce the rate of unplanned pregnancies if it is effective, safe and reversible. READ MORE

  4. 8. Top - down control: parasitism and predation on Gonyostomum semen in Swedish brown water lakes

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Ingrid Bergman; [2022]
    Keywords : limnology; phytoplankton; top-down control;

    Abstract : Gonyostomum semen is a raphidophyte microalgae that can be found in brown water lakes all over Sweden. The species forms substantial summer blooms that can completely dominate the phytoplankton community, largely due to its limited grazing pressure. To test whether parasites control the abundance of G. READ MORE

  5. 9. Use of a Sperm-Hyaluronan Binding Assay for evaluation of sperm quality in dromedary camels

    University essay from SLU/Dept. of Clinical Sciences

    Author : Anna Kotila-Ioannou; [2022]
    Keywords : Camel Semen; Dromedary camel; Sperm-Hyaluronan Binding Assay; sperm quality analysis;

    Abstract : The objective of this study was to assess the potential of Hyaluronan Binding Assay (HBA) to predict freezability and fertilization capacity of dromedary camel spermatozoa, and to determine if conventional sperm quality parameters and precursor of A-Kinase Anchoring Protein 4 (proAKAP4) values correlate with HBA results. Two semen samples were collected from each of six male camels. READ MORE

  6. 10. Exploration of the hereditary cause of sex ratio distortion in horses

    University essay from SLU/Dept. of Animal Breeding and Genetics

    Author : Susan Ott; [2021]
    Keywords : Sex ratio; horse; selfish genetic elements; meiotic drive; Icelandic horse; Standardbred horse; Coldblooded trotters; heritability; Trivers-Willard hypothesis; pedigree data;

    Abstract : Even sex ratios are seen as evolutionarily stable and are maintained by a selection against a skewed sex ratio. However, sometimes sex ratios at birth are skewed towards one sex. Reasons for this phenomenon are often unknown. READ MORE