Ovary morphology in ewes in different months of year

Lobachova, I. V.; Ascania-Nova,; str., Ascania-Nova Chervonoarmiiska

doi:10.15407/animbiol18.01.077

Cited by 3 publications

(1 citation statement)

References 29 publications

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“…Experimental animals were ewes of the Ascanian Merino breed. This breed characterizes by seasonality of reproduction with beginning of natural appearance of heat in the third decade of August-first half of September and disappearance of ovulation in February-March [8]. Data of the insemination and lambing for 2011-2017 years have been used.…”

Section: Methodsmentioning

confidence: 99%

Indices of renewal of ewe sexual activity and its correlation with age, weight, traditional reproductive traits and climatic conditions

Lobachova¹,

Ivanyna²

2018

Bìol. Tvarin

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To evaluate the quality of renewal of the sexual activity in ewes during the insemination campaign next indices were developed: IH i -the index of heat (0 or 1), IHT i -the index of heat time (from 1 to 4), ICT i -the index of conception time (from 1 to 4) and IL i -the index of lambing (from 0 to 3). Relationships between the indices and age, weight, part of animals with the heat (E%), fertility (F%), fecundity (Fm%), prolificacy (Pf) and climatic condition were researched. Data of Ascanian Merino ewes of 6 years was used.Dependences between the indices and age, weight, change of weight and reproduction traits were nonlinear. The IH i index was increasing with the rise of age, but after 6 years began to decrease. The mean IHT i index was the highest in the youngest and oldest animals indicating that the first heat delays in ewe lambs and ≥8-years old animals. Change of the ICT i index showed that the youngest and oldest animals had the lowest success to become pregnant during the first heat. Level of correlation between the weight and its change from the one side and the indices from the other was high (R>0.7) in young (≥2 years old) and moderate-noticeable (0.3

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Section: Methodsmentioning

confidence: 99%

Indices of renewal of ewe sexual activity and its correlation with age, weight, traditional reproductive traits and climatic conditions

Lobachova¹,

Ivanyna²

2018

Bìol. Tvarin

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Merino ewe lambing after stimulation with prostaglandin and PMSG and insemination with sperm of grey Karakul rambs

Lobachova¹,

Yakovchuk²

2019

Agric. sci. pract.

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Aim. To determine the effectiveness of a two-time treatment with prostaglandin F-2α (PGF2α) followed by the injection of pregnant mare serum gonadotropin (PMSG) for stimulation of sexual activity in sheep in the second half of the estrous season in the scheme of increasing the lambing rate. Methods. Thirty-seven 2.5-yearold ewes of the Askanian Merino breed, which were kept together from the age of one year, were used. In September 2018, 28 animals of this group lambed and had sucklings until November 20. Hormonal stimulation was started on December 7, 2018 by injecting all ewes with 1 ml of synthetic PGF2α and 1 ml of Prozerin. The second injection of PGF2α was given 10 days after the fi rst one. Simultaneously with the second treatment with PGF2α, the animals were injected with 500 IE of PMSG (Sergon, Czech Republic) and 2.5 ml of SuperAminoC (South Korea). The presence of estrus was not detected, and the ewes were forcibly inseminated with freshly obtained sperm of 4 grey rams of the Askanian Karakul breed in the morning for three days, beginning with the fi rst day after the PMSG injection. During the fi rst treatment with PGF2α and 3 days before the second one, the genitals of 12 ewes were sonographically examined. Results. In total, 45.9 % of stimulated animals lambed; the total fecundity was 75.7 %, and the average prolifi cacy – 1.65 ± 0.18 lambs per ewe. Among the animals, which before the experiment had the sucklings, 57.1 % lambed, among those, who did not have the suckling, – 11.1 %. After using the sperm of ram 17314, 77.8 % of ewes lambed, for rams 73697, 73792 and 73796 – 30.0, 44.4 and 33.3 %, respectively. Among the 19 lambs analyzed by wool color, 10 lambs were completely black, 9 were black with white spots. Among the spotted lambs, the color on the back, forearms and hips of one lamb had an additional shade, close to gray. Ultrasound testing showed that the ewes, which before the experiment had sucklings, showed better genital reactivity. According to the distribution of lambs by wool color, an assumption about possible partial incompatibility of the genotypes of Askanian Merino ewes and grey Karakul sheep was made that requires further study. Conclusions. The scheme of stimulating sexual activity based on two-time treatment with PGF2α followed by an injection of PMSG is capable of ensuring lambing of more than 70 % of stimulated sheep with the prolifi cacy of 1.65 lambs per ewe. A factor, increasing the effectiveness of the scheme, is the presence of sucking lambs of ewes before the stimulation starts.

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Anatomical Structure of Internal Genital Organs Zaanen Bree

Skorik

2017

Anim. Breed. and Genet.

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Goal. Goat breeding is a promising branch of animal husbandry, which is rapidly developing. The scientific literature has little information about the essential features and differences in the structure of the genital apparatus of goats. With the increase in the number of livestock and selection work in goat breeding, knowledge of the characteristics of the reproductive system is of great importance. Due to lack of knowledge of the structure of the reproductive organs of small cattle, the effectiveness of artificial insemination decreases and inefficient sperm of producers is used, since the complex structure of the cervix of the goat is an obstacle in the artificial introduction of sperm. Therefore, considering the need for further introduction of the method of artificial insemination into practice of goat breeding, the study of the peculiarities of the structure of the internal genital organs of goats is timely and necessary. Materials and methods.The study of anatomical features of the structure of the internal genital organs of goats was carried out on animals of the Zaanen breed, imported into the village. Galaiki Tarashchansky district of the Kiev region from Latvia. The material for study was the genitals obtained from goats aged 6-7 years. After the slaughter and bleeding, the genitals were separated into goats. They were then placed in an enameled cuvette and measured with a measuring tape, ruler and caliper. The linear dimensions of the ovaries, the diameter and length of the uterine horns according to the large curvature, the length of the uterine body, the length and diameter of the cervix, the number and structural features of the folds of its mucous membrane, the amount of caruncle, their height and diameter were measured. As mentioned earlier, the development of anatomical and physiological basis for artificial insemination of small ruminant animals was carried out mainly on sheep. Therefore, we compared the size of the ovaries, oviducts and uterus in goats of the Zaanen breed of Latvian selection and, according to the literature, the results of studies of similar sheep organs were analyzed. As a result of the studies of the morphological parameters of the genitalia of the goats, the following data were obtained: the mass of the left ovary – 0,6 ± 0,06 g, the right – 1,1 ± 0,04 g: the length of the left ovary – 2,0 ± 0,06 Cm, the length of the right – 2,3 ± 0,04 cm. The length of the left oviduct was – 14,2 ± 0,16 cm, and the right – 14,4 ± 0,15 cm. Accordingly, the length of the left horn of the uterus was – 13,7 ± 0,63 cm, the right – 12.2 ± 0,75 cm. The diameter of the left horn of the uterus is – 2.3 ± 0,07 cm, the right horn of the uterus is – 2,8 ± 0,08 cm. The morphological parameters of the unpaired genitals of goats were as follows: The length of the uterus body was – 1,8 ± 0,15 cm, the cervix was – 5,9 ± 0,29 cm, the cervix diameter was – 1,8 ± 0,08 cm; the number of folds in the cervix is – 4,7 ± 0,50. The height of the caruncle is – 0,5 ± 0,06 cm, their diameter is – 0,7 ± 0,10 cm, the amount of caruncle is – 96,5 ± 1,70, the area of the caruncle is on average – 0,4 ± 0,10 cm2. Conclusions. As a result of the carried out researches the anatomical and morphometric characteristics of internal sexual organs of goats are given. These data make it possible to expand and supplement knowledge on the morphology of the reproductive system of farm animals, which must be taken into account in artificial insemination of goats. The data obtained by us are somewhat different from the results of the studies of other authors, but do not contradict them.

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Ovary morphology in ewes in different months of year

Cited by 3 publications

References 29 publications

Indices of renewal of ewe sexual activity and its correlation with age, weight, traditional reproductive traits and climatic conditions

Indices of renewal of ewe sexual activity and its correlation with age, weight, traditional reproductive traits and climatic conditions

Merino ewe lambing after stimulation with prostaglandin and PMSG and insemination with sperm of grey Karakul rambs

Anatomical Structure of Internal Genital Organs Zaanen Bree

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