Download Biotechnological Innovations in Animal Productivity by BIOTOL, B.C. Currell and R C.E Dam-Mieras (Auth.) PDF

By BIOTOL, B.C. Currell and R C.E Dam-Mieras (Auth.)

ISBN-10: 0750615117

ISBN-13: 9780750615112

This paintings is worried with biotechnical thoughts in animal productiveness. it truly is a part of a sequence of biotechnology texts compatible for self-study or because the foundation for in-house education schemes. It comprises reference questions for college students, keyword phrases, and a precis of targets for every bankruptcy

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The failure of such an animal to breed is therefore a management rather than a physiological problem. The intensification of farming in the US and Europe, with animals being kept in larger groups, has added to the difficulties of management. Farm staff may have less time for oestrous observation, and animals may be less likely to express it if conditions are not favourable. Pharmacological agents are very useful in oestrus synchronisation programmes but they cannot replace good management. So, close attention to management and good nutrition are necessary for successful pharmacological control of oestrus and ovulation.

11). Note that we have labelled parts of the tertiary follicles using their technical names. Draw a stylised version of a follicle and label it, it will help you remember these names. 12). The whole follicle population can be subdivided into resting and growing follicles. The resting ones are the primordial follicles, which form a pool. The number of follicles in the pool decreases very much just before or shortly after birth, This decrease is mainly caused by degeneration of primordial follicles but a small percentage shows growth.

In the mature and older corpus luteum, not all LH-receptors are occupied. Prostaglandin-F2a binds to them preventing the LH stimulation of adenylate cyclase and cAMP production, and as a consequence the production of progesterone. The concentration of the progesterone in the blood decreases and a new oestrous cycle can start. 7 The genital tract The genital tract of large domestic animals, consisting of paired fallopian tubes and uterine horns, and a single cervix and vagina, is one of the main target organs of the ovarian steroid hormones.

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