Quantification of factors affecting semen traits in artificial insemination boars from animal model analyses1

2009 ◽  
Vol 87 (5) ◽  
pp. 1620-1627 ◽  
Author(s):  
J. Wolf ◽  
J. Smital
Keyword(s):  
Animal Model ◽  
Artificial Insemination ◽  
Factors Affecting

SOME FACTORS AFFECTING PREGNANCY RATE DURING ARTIFICIAL INSEMINATION IN CATTLE

2019 ◽  
Vol 22 (07) ◽  
pp. 118-122
Author(s):  
Haider R. Abbas ◽  
Hussein A. Khamees ◽  
Jawad K. Taher
Keyword(s):  
Pregnancy Rate ◽  
Artificial Insemination ◽  
Factors Affecting

Hyperglycemic athymic nude mice: factors affecting in vitro insulin secretion

1992 ◽  
Vol 263 (6) ◽  
pp. E1131-E1133
Author(s):  
A. Zeidler ◽  
P. Edwards ◽  
J. Goldman ◽  
S. Kort ◽  
W. P. Meehan ◽  
...  
Keyword(s):  
Animal Model ◽  
Insulin Secretion ◽  
Insulin Dependent Diabetes Mellitus ◽  
Dependent Diabetes Mellitus ◽  
Factors Affecting ◽  
In Vitro Insulin Secretion ◽  
Insulin Secretion In Vitro ◽  
And Control

The strain of athymic nude male mice (ANM) developed at the University of Southern California (USC) exhibits spontaneous hyperglycemia and relative hypoinsulinemia in vivo. To investigate factors that influence insulin secretion in this animal model of non-insulin-dependent diabetes mellitus, we utilized the isolated perfused mouse pancreas of the ANM-USC and control BALB/c mice. We compared in vitro glucose-induced insulin secretion in ANM-USC and control mice, inhibition of secretion by somatostatin, and variability of insulin secretion over the two-year period it took to complete these experiments. Glucose-induced insulin secretion from the isolated pancreas was biphasic in both ANM-USC and controls. Insulin secretion was quantitatively equal to or greater than control mice, depending on the phase of secretion analyzed and the source of the control mice. In contrast to pancreases of control mice, insulin secretion from ANM-USC pancreases was relatively resistant to inhibition of insulin secretion by somatostatin. Variability in insulin secretion over the two years in which these experiments were performed was greater from pancreases of control than that observed from pancreases of the ANM-USC. The hyperglycemic ANM-USC mouse does not demonstrate diminished insulin secretion in vitro yet is relatively hypoinsulinemic in vivo. Thus circulating factors other than somatostatin might contribute to the insulinopenic stage in this animal model.

Factors affecting reproductive performance and estimates of genetic parameters of litter size in Horro sheep

2002 ◽  
Vol 139 (1) ◽  
pp. 79-85 ◽  
Author(s):  
S. ABEGAZ ◽  
G. DUGUMA ◽  
E. NEGUSSIE ◽  
U. GELMESA ◽  
F. TEREFE ◽  
...  
Keyword(s):  
Animal Model ◽  
Litter Size ◽  
Age Structure ◽  
Reproductive Performance ◽  
Genetic Improvement ◽  
Genetic Parameters ◽  
Factors Affecting ◽  
Optimal Weight ◽  
Annual Means ◽  
Lambing Rate

Conception and lambing rate, and litter size were studied on data from a flock of Horro sheep. The CATMOD and GLM procedures of SAS were used for the analysis of these traits. A sire, direct additive genetic and a repeatability animal model were employed to obtain estimates of heritability and repeatability for litter size. The results obtained showed that year of mating, age and weight of ewes at mating and number of previous parities had significantly (P<0.01) affected the rate of conception and lambing while weight of rams at mating has shown no significant effect (P>0.05). An increase in both conception and lambing rates was observed with the increase in weight of ewes up to about 36 kg and declined thereafter. Ewes which previously had no or one parity had lower conception and lambing rates compared with ewes in later parities. However, a decline in both conception and lambing rates was also observed in old ewes. Year of lambing, parity and weight of ewes at mating had a highly significant (P<0.01) effect on litter size. The overall mean litter size in the flock was 1.34 with annual means ranging from 1.18 to 1.55. Litter size increased with parity from 1.26 in primiparous ewes to 1.44 for ewes of parities five and above. With respect to weight of ewes at mating, litter size increased by 2.5% for each kg increase in weight at mating. The estimates of direct heritability (h2) for litter size were 0.17, 0.11 and 0.06 under the sire, direct animal and repeatability models. Repeatability was estimated to be 0.12. Since heritability and repeatability estimates of litter size are low, genetic improvement by selection may not bring sizeable impact in increasing litter size. Therefore flock management for optimal age structure and optimal weight of ewes at mating should receive due consideration to improve rates of conception, lambing and litter size in Horro sheep.

The effect of semen age on conception rate

1953 ◽  
Vol 43 (3) ◽  
pp. 256-259 ◽  
Author(s):  
R. C. Campbell
Keyword(s):  
Artificial Insemination ◽  
Conception Rate ◽  
Factors Affecting ◽  
Breed Differences ◽  
External Conditions ◽  
Relationship Of ◽  
The Relationship

1. The relationship of semen age to conception rate was studied at two artificial-insemination centres and a subcentre of one of these. Data relating to 50,213 first inseminations were included in the analysis.2. It is shown that external conditions can affect the rate of decrease of conception rate with semen age.3. Records giving c.r.'s for each day of semen age may reveal centre differences that cannot be detected in records giving mean c.r.'s only.4. Information may be lost if data are grouped by months rather than recorded by collections.5. The rate of decrease should not be used for comparing centres until the various factors affecting it (e.g. breed differences) are more fully understood. Further investigations should not be limited to one centre.

Factors affecting reproductive performance of white-tailed deer subjected to fixed-time artificial insemination or natural mating

2013 ◽  
Vol 25 (3) ◽  
pp. 581 ◽  
Author(s):  
Miguel Mellado ◽  
Claudia G. Orta ◽  
Eloy A. Lozano ◽  
Jose E. García ◽  
Francisco G. Veliz ◽  
...  
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Fixed Time ◽  
Arid Environment ◽  
Factors Affecting ◽  
Litter Weight ◽  
Subsequent Period ◽  
Natural Mating ◽  
Game Hunting

The objectives of this study were to examine the effects of several factors affecting fawning rate, litter size, litter weight and neonatal fawn mortality in white-tailed deer inseminated either transcervically or by means of laparoscopy. Oestrus synchronisation with a controlled internal drug release (CIDR)-based protocol and fixed-time artificial insemination (FTAI) was conducted in 130 white-tailed deer (Odocoileus virginianus texanus) during three reproductive seasons (2007–2009; 271 services) in a game-hunting ranch in a hot–arid environment (26°4′ N, 101°25′ W). Ninety additional non-treated does were exposed to bucks for natural mating. Fawning rate did not differ between AI methods (40.0 vs 45.0% for transcervical and laparoscopic AI, respectively). Overall fawning rate (proportion of all does fawning after FTAI and a subsequent period of buck exposure) did not differ between transcervical (89.5%), laparoscopic (80.3%) or natural (88.9%) insemination. Litter size per fawning doe was higher (P&lt;0.05) in naturally-served does (1.65±0.48) than in transcervically-inseminated does (1.40±0.51) or in laparoscopically-inseminated does (1.48±0.50). The main conclusion was that no enhancement of fawning rate or litter size occurred as a result of intrauterine deposition of semen by laparoscopy compared with the transcervical insemination technique.

scholarly journals UPAYA PENGEMBANGAN POPULASI TERNAK BABI MELALUI TEKNIK INSEMINASI BUATAN DIPROVINSI SULAWESI UTARA

ZOOTEC ◽  
2018 ◽  
Vol 38 (1) ◽  
pp. 169
Author(s):  
Freelce J Mandey ◽  
U Paputungan ◽  
E Pudjihastuti
Keyword(s):  
Artificial Insemination ◽  
Average Daily Gain ◽  
Factors Affecting ◽  
North Sulawesi ◽  
Birth Weight Group ◽  
Service Efficiency ◽  
Population Breeding ◽  
Female Effect ◽  
Daily Gain ◽  
Farrowing Rate

ABSTRACTEXPEDIENCY OF INCREASING PIG POPULATION BY ARTIFICIAL INSEMINATION TECHNIQUE IN NORTH SULAWESI PROVINCE.The objective of this study was to evaluate dominant factors affecting pig population breeding by artificial insemination (AI) in North Sulawesi province. Semen of boar (Landrace, Yorkshire and Duroc breeds) were usedto mate the same breeds using AI.Data of 345 piglets from 33 sows were involved in this study. Reproductive data of sows and productivity of piglet form AI were observed at laboratory and field belonging to farmers in Minahasa regency. Pair data of male and female effect were analyzed by t-test for variables.Dominant reproduction factors affecting pig population breeding in North Sulawesi were includingservice per conception, Farrowing rate, AI service efficiency, and Farrowing index.Group of male and superior piglets were higher in productivity that those of female and inferior piglets. Preweaning Average Daily Gain (PW-ADG)groups of inferior (84.85g/h/d)were significantly lower compared with normal (86.59g/h/d), butnot significantly different with PW-ADG of superior birth weight group (85.64 g/h/d).PW-ADG.Thelitter size produced from semen bya boar naturally mated with the same sowsreached the average of 21 piglets per year, while those by a boar mated using AI technique with the same sowsreached the average of 225 piglets per year. Keywords:Artificial insemination. Pig reproduction, North Sulawesi province 

scholarly journals CONCEPTION RATE PADA SAPI KRUI DI KECAMATAN PESISIR SELATAN KABUPATEN PESISIR BARAT

2021 ◽  
Vol 5 (1) ◽  
pp. 8-13
Author(s):  
Rahmat Saputra ◽  
Madi Hartono ◽  
Sri Suharyati
Keyword(s):  
Regression Analysis ◽  
Artificial Insemination ◽  
Census Data ◽  
Body Condition Score ◽  
Secondary Data ◽  
Conception Rate ◽  
Survey Method ◽  
Factors Affecting ◽  
Negatively Associated ◽  
Condition Score

The purpose of this research was to know the value of conception rate and the factors affecting the conception rate of Krui Cattles in Pesisir Selatan District, Pesisir Barat Regency. This research was carried out using survey method with census data collection in December 2019 until January 2020. This study used data of 166 artificially inseminated Krui cattles belong to 75 farmers and secondary data of the result of artificial insemination from two inseminators. Data was analysed using multiple regression analysis with SPSS program. The result showed that conception rate of Krui cattles at Pesisir Selatan District was 58.43%. Factors that affect conception rate were the amount of forage giving that negatively associated with factor value of 0.006, body condition score that positively associated with factor value of 0.102, and service per conception that negatively associated with factor value of 0.591. Keywords : conception rates, Krui cattles

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