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Farmakologiczne sterowanie cyklem rujowym u bydła mięsnego
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Wyszukaj w serwisie


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Współczesne tendencje w farmakologicznym sterowaniu cyklem rujowym u bydła mięsnego


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Specyfika hodowli bydła mięsnego wymaga od lekarza weterynarii odmiennego podejścia do stosowanych preparatów i protokołów leczniczych niż w stadach krów mlecznych. Rozród tych zwierząt opiera się na sezonowości, co wymusza szczególny sposób planowanie nie tylko najbliższych, ale i kolejnych wycieleń. Dodatkowo w większości gospodarstw cielęta pozostają przy matce, co wpływa na wydłużenie poporodowego anoestrus. Tymczasem im szybciej w trakcie sezonu rozrodczego krowy zajdą w ciążę, tym dłuższy będzie okres od wycielenia do początku kolejnego sezonu, co z kolei umożliwi samicy lepszą regenerację i przygotowanie do ponownego zapłodnienia. Ponadto ujednolicenie statusu większej liczby krów ułatwia ich obsługę (żywienie, łączenie w grupy technologiczne, obserwację porodów), nie mówiąc już o braku konieczności obserwacji objawów rujowych, co zakładają niektóre ze stosowanych protokołów (FTAI, fixed-time artificial insemination). Istotnym problemem jest także skrócenie powycieleniowego anoestrus i przywrócenie cyklicznej aktywności jajników.

Dlatego, mimo trudności logistycznych związanych z koniecznością wyłapywania zwierząt, w celu podania im odpowiednich preparatów weterynaryjnych, na całym świecie programy synchronizacji rui w stadach bydła mięsnego zyskały ogromną popularność. Prym wiodą tu Ameryka Północna, Ameryka Południowa oraz Australia. Dla przykładu − jeszcze w pierwszych latach obecnego wieku w Argentynie programem synchronizacji rui objęte było mniej niż 100 000 sztuk bydła, natomiast dziś szacuje się tę wartość na 3 000 000 (4). Obecnie najczęściej stosowane są dwa typy protokołów – te oparte na zastosowaniu GnRH (Europa, Ameryka Północna, Nowa Zelandia) oraz schematy z użyciem estradiolu (Ameryka Północna i Australia, w Europie jego użycie jest niedozwolone). Wybór konkretnej [...]

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Mogą zainteresować Cię również


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Wizytówka firmy


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Sklep


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Poznaj nasze serwisy