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Zarazaga L, Gatica M, Delgado-Pertíñez M, Hernández H, Guzmán J, Delgadillo J. Efficacy of long day photoperiod treatment with respect to age of bucks for stimulation of the “male effect” on does at Mediterranean latitudes. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zarazaga LA, Gatica MC, De La Rosa I, Guzmán JL. The use of photoperiod-treated bucks to induce a "male effect" does not compensate for the negative effects of nutritional restriction of the females in Mediterranean goats. Res Vet Sci 2021; 139:177-185. [PMID: 34333252 DOI: 10.1016/j.rvsc.2021.07.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 07/09/2021] [Accepted: 07/22/2021] [Indexed: 10/20/2022]
Abstract
This work examined the effect of acute nutritional restriction or supplementation one week before male introduction on the reproductive performances of the "male effect" when using photostimulated or control males in goats. On 22 March, 84 anoestrous does were placed with photostimulated bucks or with bucks which had received no treatments. One week before male introduction, the females were provided with different nutritional regimes: Supplemented, restricted or control females. The non-esterified fatty acids (NEFAs) and Insulin Growth Factor-1 (IGF-1) concentrations were measured in the same samples. Fecundity, fertility, prolificacy and productivity were also determined. No interaction between both sources of variation was observed in any of the reproductive variables studied. Treatment of the bucks increased the percentage of females expressing behavioural oestrous associated with ovulation (71% vs 90% for Natural and Photo groups, respectively, P < 0.05). The Supplemented females showed higher ovulation rate than Restricted females (1.77 ± 0.13 vs 1.05 ± 0.05, P < 0.001), fecundity (71% vs 43%, P < 0.05); fertility (76% vs 29%, P < 0.05) and productivity (1.00 ± 0.15 vs 0.29 ± 0.11 kids per female, P < 0.01). In the Supplemented females, the higher reproductive results could be due to the lower NEFAs and higher IGF-1 concentrations at ovulation and at the time of oestrus compared to the Restricted females. Thus, the present experiment results demonstrate that nutrition is an important factor in the response to the "male effect" at Mediterranean latitudes, and its negative effect cannot be counterbalanced by using photostimulated bucks.
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Affiliation(s)
- L A Zarazaga
- Departamento de Ciencias Agroforestales, Universidad de Huelva, "Campus de Excelencia Internacional Agroalimentario, ceiA3", Carretera Huelva-Palos de la Frontera s/n, 21819 Palos de la Frontera, Huelva, Spain.
| | - M C Gatica
- Universidad Arturo Prat, Facultad de Recursos Naturales Renovables, Avenida Arturo Prat, 2120 Iquique, Chile
| | - I De La Rosa
- Departamento de Ciencias Agroforestales, Universidad de Huelva, "Campus de Excelencia Internacional Agroalimentario, ceiA3", Carretera Huelva-Palos de la Frontera s/n, 21819 Palos de la Frontera, Huelva, Spain
| | - J L Guzmán
- Departamento de Ciencias Agroforestales, Universidad de Huelva, "Campus de Excelencia Internacional Agroalimentario, ceiA3", Carretera Huelva-Palos de la Frontera s/n, 21819 Palos de la Frontera, Huelva, Spain
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Zarazaga LA, Gatica MC, Delgado-Pertíñez M, Hernández H, Guzmán JL, Delgadillo JA. Photoperiod-Treatment in Mediterranean Bucks Can Improve the Reproductive Performance of the Male Effect Depending on the Extent of Their Seasonality. Animals (Basel) 2021; 11:ani11020400. [PMID: 33562447 PMCID: PMC7915632 DOI: 10.3390/ani11020400] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 01/28/2021] [Accepted: 02/02/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary On the extensive and semi-extensive goat farms of the Mediterranean region, the induction of the male effect is a common reproductive management practice in spring mating (seasonal anoestrous). The sexual activity displayed by the bucks is one of the main factors that determines the reproductive performance of this practice and, for that reason, it is essential to photostimulate the bucks prior to using it. However, the effectiveness of this photostimulation and the male effect could depend on the seasonality of the breed of buck used. Thus, the present work aimed to compare the efficiency of the male effect, in terms of doe reproductive response and reproductive performance, as induced by bucks made sexually active via photostimulation, from breeds with different reproductive seasonality (Murciano–Granadina, low reproductive seasonality vs. Blanca Andaluza, high reproductive seasonality). The results demonstrated that the Blanca Andaluza bucks subjected to a natural photoperiod and used for the male effect induced a lower percentage of females into oestrus and ovulation, resulting in lower productivity. This suggests that photoperiod-treated bucks efficiently induce the male effect, but photostimulation may be more necessary for breeds with deep seasonality. Abstract This study examines the effectiveness of the photoperiod treatment (extra light for 88 days) to render the bucks sexually active during the seasonal anoestrous in order to induce a male effect, depending on the reproductive seasonality of the breed of the bucks used. In April, 57 anoestrous Blanca Andaluza does were distributed into four groups with three males each: 13 were exposed to control Murciano–Granadina bucks (lower seasonality); 15 were exposed to photostimulated Murciano–Granadina bucks; 14 were exposed to control Blanca Andaluza bucks (higher seasonality), and 15 were exposed to photostimulated Blanca Andaluza bucks. After male introduction, the sexual behaviour of the bucks was assessed, and harness marks recorded doe oestrous behaviour. Ovulation was confirmed from plasma progesterone, and the ovulation rate was assessed by transrectal ultrasonography. Fecundity, fertility, prolificacy and productivity were also determined. All of the does in all of the groups showed ovulation. Interaction between both sources of variation was observed: the percentage of females showing oestrous (p < 0.01) and productivity (p < 0.05) was the lowest in the Blanca Andaluza control group (50% and 0.36 ± 0.17 goat kids born/female, respectively). In conclusion, photoperiod-treated bucks efficiently induce a male effect, but photostimulation could be more necessary for breeds with deep seasonality.
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Affiliation(s)
- Luis A. Zarazaga
- Departamento de Ciencias Agroforestales, Campus Universitario de la Rábida, Escuela Técnica Superior de Ingeniería, Universidad de Huelva, Carretera de Huelva-Palos de la Frontera, 21819 Huelva, Spain;
- Correspondence: ; Tel.: +34-95-9217-713
| | - María Carolina Gatica
- Facultad de Recursos Naturales Renovables, Universidad Arturo Prat, Avenida Arturo Prat, Iquique 2120, Chile;
| | - Manuel Delgado-Pertíñez
- Departamento de Ciencias Agroforestales, Escuela Técnica Superior de Ingeniería Agronómica, Universidad de Sevilla, Ctra. Utrera km 1, 41013 Sevilla, Spain;
| | - Horacio Hernández
- Centro de Investigación en Reproducción Caprina, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, Torreón 27054, Mexico; (H.H.); (J.A.D.)
| | - José Luis Guzmán
- Departamento de Ciencias Agroforestales, Campus Universitario de la Rábida, Escuela Técnica Superior de Ingeniería, Universidad de Huelva, Carretera de Huelva-Palos de la Frontera, 21819 Huelva, Spain;
| | - José Alberto Delgadillo
- Centro de Investigación en Reproducción Caprina, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, Torreón 27054, Mexico; (H.H.); (J.A.D.)
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Zarazaga L, Gatica M, Hernández H, Chemineau P, Delgadillo J, Guzmán J. Photoperiod-treated bucks are equal to melatonin-treated bucks for inducing reproductive behaviour and physiological functions via the “male effect” in Mediterranean goats. Anim Reprod Sci 2019; 202:58-64. [DOI: 10.1016/j.anireprosci.2019.01.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 01/18/2019] [Accepted: 01/28/2019] [Indexed: 10/27/2022]
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Gallego-Calvo L, Gatica M, Guzmán J, Zarazaga L. Reproductive responses to sexually active buck of does treated with melatonin when body weight/body condition is increasing or decreasing. Anim Reprod Sci 2018; 190:75-84. [DOI: 10.1016/j.anireprosci.2018.01.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 01/03/2018] [Accepted: 01/26/2018] [Indexed: 10/18/2022]
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Zarazaga LÁ, Gatica MC, Gallego-Calvo ML, Guzmán JL. When using photostimulated bucks to induce the male effect in female goats living at Mediterranean latitudes, a male: female ratio of 1:20 is optimum. JOURNAL OF APPLIED ANIMAL RESEARCH 2017. [DOI: 10.1080/09712119.2017.1418669] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Luis Ángel Zarazaga
- Departamento de Ciencias Agroforestales, Universidad de Huelva, Huelva, Spain
| | | | | | - José Luis Guzmán
- Departamento de Ciencias Agroforestales, Universidad de Huelva, Huelva, Spain
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Zarazaga L, Gatica M, Gallego-Calvo L, Guzmán J. The reproductive performance of female goats treated with melatonin is not improved after introduction to bucks displaying springtime sexual activity if these does are experiencing decreasing body weight/condition score. Anim Reprod Sci 2017; 179:57-66. [DOI: 10.1016/j.anireprosci.2017.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 01/09/2017] [Accepted: 02/01/2017] [Indexed: 11/30/2022]
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Zarazaga LA, Gatica MC, Hernández H, Gallego-Calvo L, Delgadillo JA, Guzmán JL. The isolation of females from males to promote a later male effect is unnecessary if the bucks used are sexually active. Theriogenology 2017; 95:42-47. [PMID: 28460678 DOI: 10.1016/j.theriogenology.2017.02.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 02/15/2017] [Accepted: 02/27/2017] [Indexed: 11/17/2022]
Abstract
It has been suggested that female goats in permanent contact with males become refractory to their presence, and need to be previously separated from them for 40-45 days if the presence of bucks is to induce reproductive activity, ovulation and oestrous during seasonal anoestrous. The present study examines the reproductive response (ovulation and oestrus) and reproductive performance of does isolated from bucks for different periods before their reintroduction to male company. A total of 103 Payoya and Blanca Andaluza does were distributed into six treatment groups that required their isolation from males for different periods: 0 days (N = 29), 5 days (N = 15), 10 days (N = 14), 20 days (N = 16), 30 days (N = 14) and 39 days (N = 15). After this period they were introduced to sexually active bucks (ensured to be in this condition by keeping them under long days light treatment for three months), and oestrous activity was recorded daily by direct visual observation of the marks left by the marking harnesses worn by these males. Ovulation was confirmed via the plasma progesterone concentration (measured in blood samples taken twice per week). The ovulation rate was assessed by transrectal ultrasonography. Fecundity, fertility, prolificacy and productivity were also determined. The sexual behaviour of the males towards the females was also monitored on Days 0, 1, 2, 3, 4, 8 and 9 after their meeting with the latter. The length of the female isolation period had no effect on the percentage of does that responded to contact with the males, nor did it affect the oestrous response, fecundity, fertility or productivity. The males, however, undertook more ano-genital sniffing and nudging with the 5 day group females compared to those of the other groups (P < 0.05). However, the sexual behaviour of the males changed as the days passed, with ano-genital sniffing becoming less common, and nudging, licking, sneezing and mounts with intromission more frequent on Days 8 and 9 than on Day 0, 1 and 2 after the sexes were reunited (P < 0.05). These results show that the isolation of females is not necessary for an efficient male effect if the bucks used are sexually active. In addition, the sexual behaviour of the bucks changes as the time in contact with the does increases, but in general is not affected by the duration of female isolation.
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Affiliation(s)
- L A Zarazaga
- Departamento de Ciencias Agroforestales, Universidad de Huelva, "Campus de Excelencia Internacional Agroalimentario, ceiA3", Carretera Huelva-Palos de la Frontera s/n, 21819, Palos de la Frontera, Huelva, Spain.
| | - M C Gatica
- Universidad Arturo Prat, Avenida Arturo Prat, 2120, Iquique, Chile
| | - H Hernández
- Centro de Investigación en Reproducción Caprina, Departamento de Ciencias Médico Veterinarias, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, 27054, Torreón, Coahuila, Mexico
| | - L Gallego-Calvo
- Departamento de Ciencias Agroforestales, Universidad de Huelva, "Campus de Excelencia Internacional Agroalimentario, ceiA3", Carretera Huelva-Palos de la Frontera s/n, 21819, Palos de la Frontera, Huelva, Spain
| | - J A Delgadillo
- Centro de Investigación en Reproducción Caprina, Departamento de Ciencias Médico Veterinarias, Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, 27054, Torreón, Coahuila, Mexico
| | - J L Guzmán
- Departamento de Ciencias Agroforestales, Universidad de Huelva, "Campus de Excelencia Internacional Agroalimentario, ceiA3", Carretera Huelva-Palos de la Frontera s/n, 21819, Palos de la Frontera, Huelva, Spain
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Balaro MFA, Santos AS, Moura LFGM, Fonseca JF, Brandão FZ. Luteal dynamic and functionality assessment in dairy goats by luteal blood flow, luteal biometry, and hormonal assay. Theriogenology 2017; 95:118-126. [PMID: 28460665 DOI: 10.1016/j.theriogenology.2017.02.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 02/24/2017] [Accepted: 02/27/2017] [Indexed: 02/05/2023]
Abstract
This study aimed to assess the luteal dynamics of pregnant and non-pregnant Saanen goats throughout an estrous cycle by B-mode and color Doppler ultrasonography (US) associated with a P4 hormonal assay. Furthermore, a cutoff point was chosen to determine the corpus luteum (CL) functionality by luteal biometry (LB) measurement and luteal blood flow (LBF) assessment. Ultrasound assessment was carried out daily throughout an entire estrous cycle (21 days) in 23 Saanen goats pre-synchronized and inseminated in the breeding season. The plasmatic P4 concentration was determined daily by radioimmunoassay. LB parameters (diameter, area, and volume) were measured using the maximum area of a cross-section of the CL. LBF assessment was performed subjectively by percentage of area of colored pixels and objectively by calculating the number of the colored pixels. Eventually, 45.0% (9/20) and 55.0% (11/20) of goats became pregnant and or remained non-pregnant, respectively. The LB and LBF demonstrated value stabilization on the 9th day of the estrous cycle and maximum values on the 12th and 13th days of the estrous cycle, respectively. LB presented a progressive decrease in the luteal regression phase, whereas the LBF decreased abruptly in association with P4. The LBF values were more reliable in predicting the luteal functionality when compared to the LB data. The number of colored pixels accurately predicted values of P4 >1.0 ng/mL, reaching only 17% of the maximum values, and 1200 colored pixels as a minimum cutoff point when compared to the use of 53% of the maximum values and a minimum luteal diameter of 9.0 mm as cutoff point for P4 >1.0 ng/mL. The LBF assessment was more informative about the CL functionality throughout the complete luteal phase when compared to the LB. The use of the number of colored pixels is indicated for research regarding luteal functionality due to their greater correlation with P4 values. In addition, the luteal subjective evaluation can be used under field conditions due to greater convenience and similar pattern of correlation with P4.
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Affiliation(s)
- Mario Felipe A Balaro
- Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brasil Filho, 64, 24320-340, Niteroi, RJ, Brazil.
| | - Alex S Santos
- Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brasil Filho, 64, 24320-340, Niteroi, RJ, Brazil
| | - Luiz Fernando G M Moura
- Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brasil Filho, 64, 24320-340, Niteroi, RJ, Brazil
| | - Jeferson F Fonseca
- Embrapa Goats and Sheep, Rodovia MG 133, km 42, CEP 36155-000, Coronel Pacheco, MG, Brazil
| | - Felipe Z Brandão
- Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brasil Filho, 64, 24320-340, Niteroi, RJ, Brazil
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Romano JE, Alkar A, Amstalden M. Effect of copulation on estrus duration and ovulation time in goats. Theriogenology 2016; 85:330-4. [DOI: 10.1016/j.theriogenology.2015.09.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 09/03/2015] [Accepted: 09/08/2015] [Indexed: 11/16/2022]
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Reproductive performance response to the male effect in goats is improved when doe live weight/body condition score is increasing. Anim Reprod Sci 2015; 156:51-7. [DOI: 10.1016/j.anireprosci.2015.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 02/27/2015] [Accepted: 03/02/2015] [Indexed: 11/22/2022]
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Gallego-Calvo L, Gatica M, Celi I, Guzmán J, Delgadillo J, Zarazaga L. No previous isolation of female goats is required for novel males to induce a male effect, especially if direct physical contact is established. Theriogenology 2014; 82:1310-5. [DOI: 10.1016/j.theriogenology.2014.08.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 08/26/2014] [Accepted: 08/27/2014] [Indexed: 11/17/2022]
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Gallego-Calvo L, Gatica M, Guzmán J, Zarazaga L. Role of body condition score and body weight in the control of seasonal reproduction in Blanca Andaluza goats. Anim Reprod Sci 2014; 151:157-63. [DOI: 10.1016/j.anireprosci.2014.10.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2014] [Revised: 10/06/2014] [Accepted: 10/09/2014] [Indexed: 11/16/2022]
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Influence of the male effect on the reproductive performance of female Payoya goats implanted with melatonin at the winter solstice. Anim Reprod Sci 2013; 137:183-8. [PMID: 23428292 DOI: 10.1016/j.anireprosci.2013.01.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 01/24/2013] [Accepted: 01/29/2013] [Indexed: 11/21/2022]
Abstract
This research addressed the effect on reproductive performance of melatonin implants inserted at the winter solstice in Payoya goats. Female goats (n = 100) were divided into two experimental groups, one subjected and the other not subjected to the male effect. Half of each group was implanted with melatonin at the winter solstice; the remaining animals received no such hormone treatment. Oestrous activity, as detected by visual observation, was recorded daily using melatonin implanted bucks. Trans-rectal ultrasonography was used to estimate of time of ovulation. Corpus luteum activity was confirmed by plasma concentrations of progesterone greater than 0.5 ng/mL. Fecundity, fertility, prolificacy and productivity were calculated. Neither the male effect nor melatonin treatment alone influenced reproductive performance. The greater fecundity and fertility: 91.7% (P < 0.05) was obtained with melatonin implantation plus the male effect. Greater productivity occurred when melatonin was used (1.02 ± 0.10 compared with 0.76 ± 0.66 mean number of kids per female for melatonin and non-melatonin treated groups, respectively, P < 0.05). The present results show that the fertility of female Payoya goats implanted with melatonin at the winter solstice can be improved by subjecting females to the male effect. Moreover, productivity of does is enhanced when melatonin implants are used in comparison to productivity of non-treated females.
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Bukar MM, Yusoff R, Ariff OM, Haron AW, Dhaliwal GK, Naing SW, Khan MA. Comparison of the patterns of antral follicular development between hormonally synchronized and natural estrous cycles of non-seasonal, polyestrous goats in the tropics. Reprod Biol 2012; 12:325-8. [PMID: 23153704 DOI: 10.1016/j.repbio.2012.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Accepted: 02/20/2012] [Indexed: 10/27/2022]
Abstract
The effects of estrus synchronization with prostaglandin F(2α) (PGF(2α)) and Controlled Internal Drug Release Device (CIDR) on ensuing antral follicular development were documented and compared to natural estrous cycles of non-seasonal tropical goats. Two to six follicular waves were observed, with the three-follicular wave pattern being most frequently observed (58%), followed by four follicular waves (31.6%) per estrous cycle. There were no significant differences (p>0.05) between the PGF(2α)- or CIDR-synchronized and natural estrous cycles nor between the synchronized and subsequent non-synchronized cycles in terms of the time of ovulation, the duration of inter-ovulatory intervals, daily numbers of antral follicles ≥3mm in diameter, and the number of follicular waves per cycle in the goats of the present study.
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Enhancement of the male effect on reproductive performance in female Mediterranean goats with long day and/or melatonin treatment. Vet J 2012; 192:441-4. [DOI: 10.1016/j.tvjl.2011.09.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Revised: 08/26/2011] [Accepted: 09/19/2011] [Indexed: 11/20/2022]
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Superovulation in goats during the second follicular wave, with or without exogenous progesterone. Small Rumin Res 2012. [DOI: 10.1016/j.smallrumres.2011.10.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Effect of synchronization protocols and GnRH treatment on the reproductive performance in goats. Small Rumin Res 2012. [DOI: 10.1016/j.smallrumres.2011.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Bukar MM, Yusoff R, Haron AW, Dhaliwal GK, Goriman Khan MA, Omar MA. Estrus response and follicular development in Boer does synchronized with flugestone acetate and PGF2α or their combination with eCG or FSH. Trop Anim Health Prod 2012; 44:1505-11. [DOI: 10.1007/s11250-012-0095-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/25/2012] [Indexed: 11/30/2022]
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Duque-Bonisoli C, Salvador A, Díaz T, Contreras-Solis I. Ovarian Response to Oestrous Synchronization Protocol Based on Use of Reduced Doses of Cloprostenol in Cyclic Goats. Reprod Domest Anim 2011; 47:e79-82. [DOI: 10.1111/j.1439-0531.2011.01974.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Gonzalez-Bulnes A, Pallares P, Vazquez MI. Ultrasonographic imaging in small ruminant reproduction. Reprod Domest Anim 2010; 45 Suppl 2:9-20. [PMID: 20591060 DOI: 10.1111/j.1439-0531.2010.01640.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
CONTENTS Ultrasonography is a simple, reliable and non-invasive imaging technique without secondary effects. Application of ultrasonography in veterinary practice, and specifically in small ruminants, has developed to become the most efficient diagnostic tool for managing reproduction. The objectives of current revision are to offer an overview, after a short reminder of equipment and techniques for imaging genitalia in small ruminants, of the uses and utility of ultrasonography for the evaluation of physiological and pathological conditions in males and females and for the application of assisted reproductive technologies.
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Body condition is associated with a shorter breeding season and reduced ovulation rate in subtropical goats. Anim Reprod Sci 2009; 114:175-82. [DOI: 10.1016/j.anireprosci.2008.09.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2008] [Revised: 08/14/2008] [Accepted: 09/05/2008] [Indexed: 11/19/2022]
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Gonzalez-Añover P, Encinas T, Gomez-Izquierdo E, Sanz E, Sanchez-Sanchez R, Gonzalez-Bulnes A. Accuracy of in vivo and ex vivo ultrasonographic evaluation of ovarian follicles and corpora lutea in sows. Theriogenology 2009; 71:1433-9. [DOI: 10.1016/j.theriogenology.2009.01.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2008] [Revised: 01/04/2009] [Accepted: 01/16/2009] [Indexed: 11/30/2022]
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Teixeira D, Lopes-Júnior E, Sousa F, Pinheiro E, Serova I, Andreeva L, Freitas V. The use of real-time ultrasonography to select embryo donors participating in a transgenesis goat programme. Small Rumin Res 2008. [DOI: 10.1016/j.smallrumres.2008.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Simões J, Mascarenhas R. Origin and characterisation of preovulatory follicles of hyperstimulated oestrous cycles in goats. Acta Vet Hung 2007; 55:259-66. [PMID: 17555291 DOI: 10.1556/avet.55.2007.2.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The origin and evolution of preovulatory follicles (POF) in 9 hyperstimulated (polyovulatory) Serrana goats were characterised. After oestrus synchronisation and detection, transrectal ovarian ultrasonography was performed daily during two complete oestrous cycles. Blood samples were taken every 4 h during 24 h after oestrus detection for preovulatory LH peak and twice a week for plasma progesterone determinations. The interovulatory interval of 14 oestrous cycles with double ovulations was 21.1 +/- 0.3 days. The onset of ovulatory follicular wave occurred 4 days (-3.9 +/- 0.3 days, n = 14) prior to the ovulation day (day 0) with a POF size of 6.9 +/- 0.2 mm (n = 28). In goats with ovulations in both ovaries (78.6%), the emergence of the first POF occurred earlier (-4.1 +/- 0.3 days) than the second POF (-3.3 +/- 0.2 days, n = 11, P < 0.05). No differences in the total number of follicles > or = 2 mm were found between the day of POF emergence (4.3 +/- 0.4) and the day before ovulation (3.5 +/- 0.3, P > 0.05). These results showed the existence of a delay between the emergence of first and second POF and suggest a weak dominance effect in goats with double ovulations.
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Affiliation(s)
- J Simões
- CECAV, University of Trás-os-Montes e Alto Douro, Apartado 1013, 5001-811 Vila Real, Portugal.
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Simões J, Almeida JC, Baril G, Azevedo J, Fontes P, Mascarenhas R. Assessment of luteal function by ultrasonographic appearance and measurement of corpora lutea in goats. Anim Reprod Sci 2007; 97:36-46. [PMID: 16481133 DOI: 10.1016/j.anireprosci.2006.01.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2005] [Revised: 01/03/2006] [Accepted: 01/10/2006] [Indexed: 10/25/2022]
Abstract
In order to characterize the evolution pattern of the corpora lutea (CL) and to compare luteal function with their ultrasonographic appearance, 37 estrous cycles of Serrana goats (n=22) were studied during breeding season. A daily transrectal ultrasound scanning was performed through two successive estrous cycles. Both solid and fluid-filled CL were observed and measured in both ovaries of each goat. Additionally, each CL was classified as CL(ICHE) (CL with irregular contours and heterogeneous echotexture) or CL(RCGE) (CL with regular contours and granular echotexture). Ovarian cyclic activity and luteal function were evaluated by biweekly plasma progesterone (P4) determination. The CL (n=60) were first visualized on day 2.9+/-1.0 after the day of ovulation (day 0), showing 7.1+/-1.8mm of diameter and reach their maximum size (12.5+/-1.6mm) on day 10.7+/-3.2 (P<0.001). Two days before the following ovulation (day -2), the CL regressed to 8.4+/-1.3mm (P<0.001). The central cavity was found in 78.3% of CL, and had a persistence of over 50% until the last days of estrous cycle. The ratio CL length/cavity length was low during the first-third and high during the remaining two-thirds of estrous cycle. On day 2, the percentage of CL(ICHE) was 33.3%, and began to decrease to 16.7% on day 6, reaching the minimum of 3.3% on day 10 (P<0.001). This proportion increased on day -3 to 48.3% and reached 90% on day -1 (P<0.001). The correlation between CL size and plasma P4 levels was r=0.63 (n=87; P<0.001). A negative correlation between the daily proportion of CL(ICHE) and plasma P4 levels was found (r=-0.95; n=18; P<0.001). These results suggest that the ultrasonographic appearance of CL is a reliable parameter for the assessment of luteal function in goats. Both the characterization of echotexture and size of central cavity could be valuable tools to differentiate between phases of normal estrous cycles.
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Affiliation(s)
- J Simões
- CECAV, University of Trás-os-Montes e Alto Douro, Apartado 1013, 5001-811 Vila Real, Portugal.
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Simões J, Almeida JC, Valentim R, Baril G, Azevedo J, Fontes P, Mascarenhas R. Follicular dynamics in Serrana goats. Anim Reprod Sci 2006; 95:16-26. [PMID: 16226410 DOI: 10.1016/j.anireprosci.2005.09.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2004] [Revised: 08/29/2005] [Accepted: 09/01/2005] [Indexed: 10/25/2022]
Abstract
Twenty-two Serrana goats were studied through two successive estrous cycles in order to characterize their follicular dynamics during the breeding season. The ovaries of the goats were scanned daily by real-time ultrasonography and all follicles >or=3mm were measured and classified. The data were classified by the number of follicular waves per goat to test the hypothesis that temporal and morphological differences between the last follicular wave of an ovary, irrespective of ovulation, will affect the selection of the next ovulatory wave. The mean interovulatory interval was 20.7+/-1.0 days (mean+/-S.D.). Three to five waves per estrous cycle were observed and 61.3% (19/31) of cycles had four waves. In estrous cycles with four waves, the day of onset of the first, second, third and fourth wave was 1.4+/-1.0, 6.9+/-1.4, 11.6+/-1.8 and 16.8+/-1.6, respectively. No differences (P>0.05) were found between the day of onset of the first and second waves for estrous cycles with three, four or five waves. However, the day of onset of the third and fourth waves occurred later when the number of waves per estrous cycle increased (P<0.001). The duration of the interwave interval (time between the day of onset of two consecutive waves) was longer when the second wave was ovulatory. The length of the growth phase (2.4+/-0.9 days) and size (5.9+/-0.7 mm) of the dominant follicle in the second wave were lower (P<0.01) than for the first wave (3.3+/-1.2 days and 6.6+/-0.9 mm, respectively) and the fifth wave (4.1+/-1.2 days and 7.5+/-1.0mm, respectively). Within pairs of ovaries, the onset of the last wave occurred later (P<0.05) and was less variable in ovulatory ovaries (day 16.8+/-1.4, n=20) than in anovulatory ovaries (day 15.1+/-3.7, n=20). The length of the growing phase was longer (P<0.001) in the last waves of ovulatory ovaries (3.1+/-0.9 days) than in the last waves of anovulatory ovaries (1.7+/-0.8 days). These results support the hypothesis that the day of onset of the ovulatory wave is related to or, at least, conditioned by the luteolysis and the decrease in plasma progesterone. In summary, the estrous cycle of Serrana goats is characterized by sequential follicular wave growth with a great variability in their onset and duration, with the exception of the ovulatory wave. The temporal and morphological differences observed in the last wave of estrous cycle provide strong evidence for the role of progesterone in their regulation.
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Affiliation(s)
- J Simões
- CECAV, University of Trás-os-Montes e Alto Douro, Apartado 1013, 5000-911 Vila Real, Portugal.
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