Wyniki wyszukiwania - Biblioteka Nauki

1

Ovulation level and prolificacy in ewes depending on their age, birth type and percentage of prolific genotype

100%

Kareta W. , Korman K. , Cegla M.

Reproductive Biology

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2006

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tom 06

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nr Suppl.2

2

Hatchery testing of GnRH analogue-containing pellets on ovulation in four cyprinid species

100%

Horvath L. , Szabo T. , Burke J.

Polskie Archiwum Hydrobiologii

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1997

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tom 44

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nr 1-2

3

Transrectal ultrasonography in diagnosing the ovulation rate in sheep

100%

Slosarz P. , Frankowska A. , Mis M.

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2003

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tom 21

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nr 3

EN

On the day of ovulation and next on day 7 after ovulation the ovaries of 20 sheep were examined using the transrectal ultrasound method. To verify the results, similar examination was made with the laparoscopic method. Depending on the stage of the sexual cycle (day 1 vs day 7) the number of Graafian follicles (∅ ≥5 mm) was determined as well as the total number of corpora lutea found in both ovaries. Out of the total number of 53 Graafian follicles found laparoscopically, 42 (79,2%) were detected with the ultrasound method. The detectability of corpora lutea with the ultrasound method was found similar (79,5%). A considerable improvement in the accuracy of ultrasonic measuring was observed when the determinations were repeated next year. This reflects the effect of the experience gathered by the person taking the measurements.

PL

W dniu owulacji i w siódmym dniu po owulacji badano metodą ultrasonograficzną (trans rectum) jajniki 20 dorosłych owiec, a następnie, dla weryfikacji wyników, badania powtórzono metodą laparoskopii. W obu fazach cyklu płciowego określono liczbę pęcherzyków Graafa (∅ ≥5 mm) oraz liczbę ciałek żółtych występujących na obu jajnikach łącznie. Z ogólnej liczby 53 pęcherzyków jajnikowych wykrytych laparoskopowo, 42 (79,2%) zidentyfikowano metodą ultrasonograficzną. W przypadku ciałek żółtych, wykrywalność metodą ultrasonografii była podobna (79,5%). W powtórzeniu II (rok 2) stwierdzono wyraźną poprawę wyników ultrasonografii, co świadczy o rosnącym doświadczeniu osoby wykonującej pomiary.

4

Ovulation rate and prolificacy in Booroola x Olkuska crossbred ewes

84%

Klewiec J. , Martyniuk E. , Gabryszuk M. , Baranowski A.

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tom 22

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nr 3

EN

The study presents a comparison of ovulation rate (CL number) and litter size between pure Booroola (BB) and their reciprocal crosses (F1 and F2) with Olkuska sheep. As these breeds express a high reproduction potential and in the same time differ significantly in other performance traits affecting lamb production, it was assumed that their crosses might combine beneficial characteristics of both. When the total numbers of CL were analysed the ovulation rate in BB appeared by 0.6 higher (P≤0.002) than in crossbred ewes (F1 and F2 pooled). However, no such difference was ascertained when analysing the maximum CL numbers. Ovulation rate and litter size did not differ between F1 and F2 crossbred ewes.

PL

Mieszańce F1 owcy booroola (BB) z owcą olkuską (O) – BO – uzyskano z obukierunkowego krzyżowania 30 maciorek BB z dwoma trykami O i 12 maciorek O z sześcioma trykami BB. Pokolenie F2 pochodziło z kojarzenia F1 × F2. Analizowano poziom owulacji i plenność 46 maciorek BB i 73 maciorek BO, uwzględniając 22 maciorki F1 i 40 maciorek F2. Łączna liczba ciałek żółtych maciorek BB była wyższa o 0,6 (P≤0,002) niż stwierdzona u mieszańców F1 i F2. Natomiast nie udowodniono różnicy w maksymalnej liczbie ciałek żółtych. Plenność maciorek BB i BO była na jednakowym poziomie. Nie stwierdzono różnic w poziomie owulacji i plenności między maciorkami F1 a F2.

5

Stimulation of ovulation rate in ewes by continuous oxytocin administration during oestrus

84%

Bobowiec R. , Kosior-Korzecka U. , Wojcik M. , Martelli F. , Sighieri C. , Patkowski K.

Acta Scientiarum Polonorum. Medicina Veterinaria

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2003

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tom 02

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nr 2

6

Zastosowanie ultrasonografii do okreslania wskaznika owulacji u loszek

67%

Klocek C. , Kalm E.

Acta Agraria et Silvestria. Series Zootechnica

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1993

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tom 31

29-35

7

Impact of contrasting fish oil concentrations in the diet on ovine embryo development in vivo and of corresponding diet-specific derivative sera during in vitro culture

67%

McEvoy T. G. , Onal A. G. , Speake B. K. , Robinson J. J.

Journal of Animal and Feed Sciences

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2012

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tom 21

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nr 1

EN

In the first of two experiments, numbers of ovulations and day 5 embryo yields were unaffected by fish oil (0, 3 or 6% w/w) in ewe diets; oestradiol concentrations and numbers of large ovarian follicles were increased. Fish oil tended to suppress embryo development and limit blastocyst diameter and cell number but not protein synthesis. In the second experiment IVF-derived embryos were cultured in medium supplemented with foetal calf serum (FCS) or, as in vitro equivalents to Experiment 1, serum from ewes fed rations supplemented with 0 (C), 3 (3F) or 6 (6F)% fish oil. Cleavage rates were not affected by serum source. More Grade 1 to 1.5 blastocysts were produced when using 3F serum (32% of blastocysts) than with C (27%; ns) or 6F (16%; P<0.05) or FCS (10%; P<0.005). It is suggested that at less than 3% inclusion in the diet of ewes, there may be beneficial effects of fish oil fatty acids on embryo production in vivo and of the corresponding ewe serum during in vitro culture. Higher concentrations are counter-productive.