Biotechnology in Animal Husbandry - Institut za Stočarstvo

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Evaluation of steroid hormones anabolic use in cattle animal age. The hormone concentrations exceeding those mentioned above point to abuse of these substances as anabolics. In comparison with physiological values reported in the literature, the results obtained in the present study and data on study animals indicated that illegal use of anabolic substances could not be suspected in none of the studied animals. As data on plasma hormones concentrations have not yet been precisely determined, are quite inadequate for different animal species and categories, and depend on numerous factors, additional studies are definitely necessary. Future studies should be focused on the hormone pattern of the population because these results would contribute to better identification of the possible abuse. Evaluation of the analytical results on hormone concentrations should always consider all the known factors that may potentially influence the result interpretation and apply some of the corroborative analytical methods if necessary. Furthermore, scientific concepts on the effects of some substances are modified and their potential undesired effects are discovered on a daily basis. Therefore, besides determination of the physiological levels of 17β-estradiol, progesterone and testosterone in particular cattle categories, the fate of other as yet uninvestigated substances that may exert a similar anabolic effect should also be monitored. Ocena anaboličkog korišćenja steroidnih hormona kod goveda u državi Hrvatskoj J. Pleadin, S. Terzić, N. Perši, A. Vulić Rezime Prirodni polni hormoni su deo endokrinog sistema i nalaze se u biološkom materijalu životinja. U analizama rezidua supstanci sa anaboličkim efektom, radi otkrivanje njihove zloupotrebe, potrebno je znati fiziološke nivoe ovih hormona kako bi mogle da se razlikuju fiziološke koncentracije od nezakonite upotrebe anabolika. Koncentracije hormona koje prevazilaze fiziološki nivo, otkrivene prilikom nezakonitog korišćenja anabolika, ukazuju na zloupotrebu ovih supstanci za anaboličke svrhe. U ovom radu, koncentracije prirodnih hormona, 17βestradiola, progesterona i testosterona merene su u plazmi goveda različite starosti i pola. Koncentracije prirodnog hormona utvrđene su pomoću kvantitativne ELISA metode u uzorcima plazme iz goveda raznih rasa sa nekoliko farmi u Hrvatskoj tokom 2006-2009. godine. Korišćene metode su pokazale efikasnost (oko 75-87%), za određivanje koncentracija 17β-estradiola, progesterona i testosterona u plazmi goveda. 155
156 J. Pleadin et al. Koncentacije polnih hormona bile su statistički značajno više u plazmi jednogodišnjih grla u odnosu na plazmu sa teladi (p
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Page 37 and 38: 160 Efficiency of bovine IGF -I gen
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Biotechnology in Animal Husbandry 2
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Results and Discussion Analysis of
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Analysis of applied biosecurity mea
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Analysis of applied biosecurity mea
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The correlation between body measur
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234 N. Memiši et al.. BERNACKA H (
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236 N. Thomas et al. nodosus is ess
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238 N. Thomas et al. The proportion
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240 N. Thomas et al. kod malabri (1
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242 Y. Aleksiev ultimately, influen
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244 Y. Aleksiev Table 1. Mean daily
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246 Y. Aleksiev post-shearing, roug
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248 Y. Aleksiev 18:00 h. U proseku,
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Determination of lead, cadmium and
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260 A. Kuzelov et al carcass clean.
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262 A. Kuzelov et al Flak et al. (1
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Materials and Methods Study of bioc
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Study of biochemical polymorphism .
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Study of biochemical polymorphism .
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The correlation between hygienic pa
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Physiological aspects of behaviour
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Instruction for authors Papers for
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PETROVIĆ D.M., GUTIĆ M., BOGOSAVL
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Registration fee Registration fee i
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Институт за сточар
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