Sexual Behaviour and Seminal Attributes Associated with Fertility of Jaffarabadi Buffalo Bulls

2021 ◽  
Author(s):  
K.H. Parmar ◽  
T.K. Patbandha ◽  
R.J. Raval ◽  
F.S. Kavani
Keyword(s):  
Sexual Behaviour ◽  
Conception Rate ◽  
Service Conception ◽  
Rectal Palpation ◽  
Selection Of

Background: The selection of breeding bulls based on the association of sexual behaviour, seminal attributes and conception rate are more important and economical. However, information on association of sexual behaviour and seminal attributes with fertility in buffaloes particularly with reference to Jaffarabadi buffalo bulls is meager. Methods: The study was carried out to assess the association of sexual behaviour and seminal attributes with first service conception rate (FCR) of Jaffarabadi buffalo bulls. A total of 192 semen ejaculates were evaluated and cryo-preserved. First AI conception rate (FCR) was carried out on 800 Jaffarabadi female buffaloes inseminated with frozen-thawed semen and pregnancy was confirmed by per rectal palpation at 2 months post-insemination. Result: The results indicated that both sexual behaviour and seminal attributes were associated with fertility in Jaffarabadi buffalo bulls.

23 EFFECTS OF THE NUMBER OF SERVICES FERTILITY IN DAIRY COWS

2011 ◽  
Vol 23 (1) ◽  
pp. 118 ◽  
Author(s):  
M. Yamaguchi ◽  
M. Tanisawa ◽  
H. Koyama ◽  
S. Takahashi ◽  
O. Dochi
Keyword(s):  
Dairy Cows ◽  
Conception Rate ◽  
Low Fertility ◽  
Chi Square ◽  
The Third ◽  
Total Percentage ◽  
Conception Rates ◽  
Service Conception ◽  
Chi Square Test ◽  
Rectal Palpation

In recent years, reproductive performance of dairy cows has been declining worldwide, especially among cows of high genetic merit for milk production. The cause of the low fertility may considerably vary across countries and is probably multifactorial. This problem remains unsolved. Further, the first-service conception rate of dairy cows has remarkably decreased worldwide. The number of services required for conception has increased due to the low fertility in dairy cows. However, there are few reports about the relationship between conception rates and the number of services in the current dairy cows. The objective of this study was to investigate whether the number of services affects the conception rates of dairy cows. Data concerning the conception rates was obtained for 8386 Holstein cows from 40 commercial dairy herds in eastern Hokkaido, Japan, from 2006 to 2009. The diagnosis of pregnancy was confirmed by rectal palpation between 30 and 45 days after insemination. The average interval between calving and the first-service was 87.3 days. The average milk yield was 8500 kg. Number of conducting services was from the first to the seventh service. The conception rate was analysed using chi-square test. The results are presented in Table1. The conception rate from the first to the seventh service was 40.2 to 54.0%. The conception rate at the first service was significantly low (40.2%); however, the conception rates did not significantly differ after the second-service. A similar tendency was observed during each year. Moreover, the total percentage of conceptions from the first to the third service was 83.8%. The average number of services per conception was 2.2. The results of this study indicate that the first service yielded the lowest conception rates. The conception rates after the second service did not significantly differ. Moreover, ∼84% of the dairy cows became pregnant between the first service and the third service. However, this result shows that ∼16% of the dairy cows in the herds were repeat breeding. In order to improve fertility, it is necessary to study the factors that affect the first-service conception rates of dairy cows. Moreover, to improve the conception rate of dairy cows, it is important to elucidate the cause of these problems. Table 1.The number and percentage of dairy cows conceiving at each of the services for consecutive services

scholarly journals Morphological sperm abnormalities of different breeds of AI bull and its impact on conception rate of cows in AI programme

1970 ◽  
Vol 2 (2) ◽  
pp. 129-135 ◽  
Author(s):  
MJU Sarder
Keyword(s):  
Artificial Insemination ◽  
Morphological Characteristics ◽  
Dairy Farm ◽  
Conception Rate ◽  
Genetic Groups ◽  
Sperm Abnormalities ◽  
Total Head ◽  
Service Conception ◽  
Positive Correlations ◽  
Rectal Palpation

The main objective of this study was to evaluate the effect of genetic groups of bulls on morphological characteristics of spermatozoa in relation to conception rate of first inseminated cows. For this purpose, 1390 ejaculates of semen were collected from 71 bull of six genetic groups at Central Cattle Breeding Station and Dairy Farm (CCBSDF), Savar, Dhaka; Rajabarihat Dairy Cattle Improvement Farm (RDCIF), Rajshahi, and District Artificial Insemination Centre, Rajshahi, from January 1997 to March 2002. A total of 20936 cows were inseminated by 40 technicians of different AI Sub-centre or points under the District Artificial Insemination Centre, Rajshahi, and pregnancy was confirmed on rectal palpation at 90 to 120 days after insemination. The average values of total head abnormalities, free loose head, mid-piece, tail abnormalities, proximal and distal cytoplasmic droplets, total tail abnormalities and total sperm abnormalities were 5.45%, 2.44%, 1.19%, 6.19%, 0.74%, 0.57%, 11.16% and 16.38%, respectively. Genetic groups of bull had significant (p < 0.05) effect on all the morphological characteristics of spermatozoa. The lower incidence of total sperm abnormalities (13.45%) was found in the genetic groups of 100% SL and higher (19.28%) in 75% F x 25% L bulls. The genetic groups of bulls had significant effect on first service conception rate of cows. The conception rate was higher in cows inseminated with 100% Local than those inseminated with genetic groups of 75% F x 25% L (53.13% vs 45.88%; p < 0.05). Significantly strong positive correlations were found between total head abnormalities and total sperm abnormalities (r = 0.828; p < 0.01) as well as between total tail abnormalities and total sperm abnormalities (r = 0.892; p < 0.01). It appears from the results that minimum total sperm abnormalities are found for pure breed bulls than cross-bred bulls, and 100% Local, 100% Friesian and 50% SL x 50% F bulls had better conception rates on cows.Key words: Spermatozoa; abnormalities; bull; genetic group; AI; conception ratedoi: 10.3329/bjvm.v2i2.2555Bangl. J. Vet. Med. (2004). 2 (2): 129-135

scholarly journals 260 Genetic prediction for first-service conception rate in Angus heifers using a random regression model

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 197-198
Author(s):  
Miguel A Sánchez-Castro ◽  
Milt Thomas ◽  
Mark Enns ◽  
Scott Speidel
Keyword(s):  
Conception Rate ◽  
Random Regression ◽  
State University ◽  
Base Function ◽  
Genetic Prediction ◽  
Colorado State University ◽  
Random Regression Model ◽  
Service Conception ◽  
Available Information ◽  
Angus Heifers

Abstract First-service conception rate (FSCR) can be defined as the probability of a heifer conceiving in response to her first artificial insemination (AI). Given the binary nature of its phenotypes, FSCR has been typically evaluated using animal threshold models (ATM). However, susceptibility of these models to the extreme-category problem (ECP) limits their ability to use all available information to calculate Expected Progeny Differences (EPD). Random regression models (RRM) represent an alternative method to evaluate binary traits, and they are not affected by ECP. Nevertheless, RRM were originally developed to analyze longitudinal traits, so their usefulness to evaluate traits with singly observed phenotypes remains unclear. Therefore, objectives herein were to evaluate the feasibility of a RRM genetic prediction for heifer FSCR by comparing its resulting EPD and genetic parameters to those obtained with a traditional ATM. Breeding and ultrasound records of 4,334 Angus heifers (progeny of 354 sires and 1,626 dams) collected between 1992 to 2019 at the Colorado State University Beef Improvement Center were utilized. Observations for FSCR (1, successful; 0, unsuccessful) were defined by fetal age at pregnancy inspections performed approximately 130 d post-AI. Traditional FSCR evaluation was performed using a univariate BLUP threshold animal model, whereas an alternative evaluation was performed by regressing FSCR on age at AI using a linear RRM with Legendre Polynomials as the base function. Heritability estimates were 0.03 ± 0.02 for the ATM and 0.005 ± 0.001 for the average age at AI with the RRM, respectively. Pearson and rank correlations between EPD obtained with each method were 0.63 and 0.60, respectively. The regression coefficient of RRM predictions on those obtained with the ATM was 0.095. In conclusion, these results suggested that although a RRM genetic prediction for FSCR was feasible, a considerable degree of re-ranking occurred between the two methodologies.

Observations On the Sexual Behaviour of Some Longicorn Beetles, Subfamily Lepturinae (Coleoptera, Cerambycidae)

Behaviour ◽  
1963 ◽  
Vol 22 (1-2) ◽  
pp. 152-166 ◽  
Author(s):  
Axel Michelsen
Keyword(s):  
Comparative Analysis ◽  
Sexual Behaviour ◽  
The State ◽  
Round Dance ◽  
Selection Of ◽  
Stimulation Of

AbstractA description is given of the sexual behaviour of 16 longicorn beetles of the subfamily Lepturinae. The following points have been investigated:- 1. Stimulation of the female performed by the male either as a "licking" or combined "licking and tapping" of the female elytra or the grasping of an antenna of the female. 2. Movements of the antennae of the male, which seem to be an expression of the "state of excitement" of the male. These movements are in principle thought to be one of the behaviour patterns originally present in the order Coleoptera. 3. A "round dance", one of the methods for the female to throw off the male after copula, is described. 4. A selection of partner according to size is described in the genus Rhagium. 5. A comparative analysis is attempted for some species and systematic conclusions of such comparisons are proposed.

scholarly journals Effects of Extruded Linseed and Soybean Dietary Supplementation on Lactation Performance, First-Service Conception Rate, and Mastitis Incidence in Holstein Dairy Cows

Animals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 436
Author(s):  
Ahmed Dawod ◽  
Hamada Ahmed ◽  
Reham Abou-Elkhair ◽  
Hamed T. Elbaz ◽  
Ayman E. Taha ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Milk Yield ◽  
Unsaturated Fatty Acids ◽  
Saturated Fatty Acids ◽  
Dietary Supplementation ◽  
Basal Diet ◽  
Conception Rate ◽  
Service Conception ◽  
Holstein Dairy Cows

This study quantifies the effects of extruded linseed and soybean (ELS) dietary supplementation on milk yield, composition, and fatty acid profiles, as well as first-service conception rate in Holstein dairy cows. Seventy-eight open Holstein dairy cows were divided into two groups: (1) a control, which received a basal diet; and (2) a test group, which received a basal diet supplemented with the ELS (650 g/kg of extruded linseed and 150 g/kg of extruded soybean) at a rate of 100 g/kg. In the ELS group, milk yield per day and solid not fat (SNF) yield increased by 3.26% and 0.88%, respectively, in relation to the control. Percentage milk fat decreased significantly by 1.4% in the ELS group when compared with the control. The ELS supplement resulted in a decrease in saturated fatty acids (SFAs) and an increase in monounsaturated (MUFAs) and polyunsaturated fatty acids (PUFAs) in milk. In conclusion, the supplementation of dairy cow feed with 100 g/kg of ELS increases milk yield and milk unsaturated fatty acids (especially MUFAs and PUFAs). ELS supplementation also causes a decrease in percentage fat and SFA levels but does not affect the first-service conception rate or the incidence rate of mastitis.

210 FACTORS AFFECTING CONCEPTION RATE IN LACTATING HOLSTEIN RECIPIENTS

2007 ◽  
Vol 19 (1) ◽  
pp. 222
Author(s):  
D. T. G. Jardina ◽  
C. A. Rodrigues ◽  
J. L. M. Vasconcelos
Keyword(s):  
Embryonic Development ◽  
Embryo Quality ◽  
Estradiol Benzoate ◽  
Sao Paulo ◽  
Conception Rate ◽  
Embryonic Mortality ◽  
São Paulo ◽  
Factors Affecting ◽  
Size Classification ◽  
Rectal Palpation

This study evaluated embryo transfers from Holstein donors in lactating Holstein recipients. It was performed at the Santa Rita Farm, Descalvado, SP, Brazil, between January 2005 and January 2006. Holstein recipients were milked 3 times a day and fed with total mixed ration. Embryos were obtained by a superstimulation protocol with two 3-mg norgestomet ear implants (Crestar�; Intervet, Sao Paulo, Brazil) and an IM injection of 3 mg of estradiol benzoate (EB) on random days of the estrous cycle. Four days later, 500 IU FSH (Pluset�; Laboratorios Calier de Argentina) was divided into 8 decreasing doses given IM 12 h apart. With the seventh FSH injection, 0.530 mg of sodium cloprostenol (PGF2�, Ciosin�; Coopers Brazil, Sao Paulo, Brazil) was given IM; implants were removed with the eighth FSH injection. Twelve hours later, 250 �g gonadorelin (Fertagyl�: Intervet, Brazil) was given IM, followed by two AI 12 and 24 h later. Ova/embryos were recovered 6.5 days after the first insemination. Recipients (n = 2543) received an injection of PGF2� and were observed in estrus (n = 1322). Presence of CL was evaluated by rectal palpation of cows that presented heat, and embryo transfers (n = 873) were performed with a nonsurgical method 6 to 8 days after heat. Pregnancy diagnoses were performed by ultrasonography (Aloka 500, probe 5.0 MHz; Aloka) on Days 25 and 39. Embryonic mortality was considered when any recipient pregnant on Day 25 was open on Day 39. Data were analyzed by logistic regression and variables included in the model were: donor status (lactating or non-lactating), recipient CL external size classification (1 &gt; 2 &gt; 3), donor–recipient synchrony (-1, 0, +1), fresh or frozen embryos, embryonic development (Mo, Bi, Bl, Bx – IETS), and embryo quality (degree 1, 2, 3 – IETS). The conception rate (CR) on Day 25 was influenced by donor–recipient synchrony (-1: 37.7%; 0: 46.9%; +1: 45.6%; P = 0.053). Embryonic development (Mo: 45.6%; Bi: 41.8%; Bl: 46.9%; Bx: 43.8%), embryo quality (1: 44.2%; 2: 47.4%; 3: 42.3%), CL external size classification (CL 1: 47.9%; CL 2: 43.5%; CL 3: 30.0%), embryo condition (fresh: 45.8%; frozen: 43.1%), and donor status (lactating: 45.5%; non-lactating: 47.08%) did not affect conception rate. The CR on Day 39 was also affected by donor–recipient synchrony (-1: 29.9%; 0: 34.9%; +1: 38.2%; P = 0.021). Embryonic mortality was affected by donor status (lactating, 16.6% vs. non-lactating, 24.0%; P &lt; 0.10). These data suggest that donor–recipient synchrony is a major factor affecting conception rate in lactating Holstein recipients.

scholarly journals Study on the effect of insemination time on pregnancy rate of Bangladeshi buffalo in intensive farming

2019 ◽  
Vol 16 (2) ◽  
pp. 143-152
Author(s):  
MA Hamid
Keyword(s):  
Pregnancy Rate ◽  
Artificial Insemination ◽  
Conception Rate ◽  
Transrectal Ultrasonography ◽  
Livestock Breeding ◽  
Intensive Farming ◽  
Rectal Palpation

The study was designed to evaluate the insemination time and pregnancy rate of Bangladeshi buffalo at Lal Teer Livestock Breeding and Research Farm, Bhaluka, Mymensingh, Bangladesh during January 2017 to June 2018. A total of 30 cyclic buffaloes were included in this study. The animals were inseminated under four different times, i.e. inseminated i) between 0-6 hours after seeing first sign of estrous, ii) between 6-12 hours after seeing first sign of estrous, iii) between 12-18 hours after seeing first sign of estrous and v) between 18-24 hours after seeing first sign of estrous. The pregnancies (positive or negative) were confirmed by rectal palpation and transrectal ultrasonography after 60 days of artificial insemination (AI). The total pregnant animals in this study were 40%. The highest pregnancy rate (60%) was observed in insemination between 12-18 hours after seeing first sign of estrous and the lowest pregnancy rate (0%) was observed in insemination between 0-6 hours after seeing first sign of estrous. The findings of the study suggest that, the conception rate of buffalo depend on the time of AI, detection of proper estrus symptoms and site of semen deposition. SAARC J. Agri., 16(2): 143-152 (2018)

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