Pub Date : 1900-01-01DOI: 10.21451/1809-3000.rbra2021.047
Stornelli Marí Alejandra
{"title":"Efeitos da sazonalidade sobre espermatozóides epididimários e ejaculados","authors":"Stornelli Marí Alejandra","doi":"10.21451/1809-3000.rbra2021.047","DOIUrl":"https://doi.org/10.21451/1809-3000.rbra2021.047","url":null,"abstract":"","PeriodicalId":153636,"journal":{"name":"Revista Brasileira de Reprodução Animal","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130478725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.21451/1809-3000.rbra2021.020
R. Ungerfeld
The reproductive results in sheep or goat flocks is consequence of multiple factors, including the interactions between males, and how these interactions modify the sexual behavior of other males. The present review summarizes information on the dominance relationships between rams or bucks, and how these relationships affect their reproductive outcomes. Dominance relationships affect the access of some males to estrous females, influencing the total distribution of sperm among the flock. The review provides information on how dominance relationships are established during the development period, and also after mixing previously unknown males. The period of relationships establishment is extremely stressful for rams and bucks, and destabilize the social relationships, affecting even sperm quality. Dominant and subordinate males display different strategies to impregnate females, but females also participate in mate choice decisions with proceptive behaviors, selecting subordinate males, favoring the maintenance of genetic diversity. Although a high proportion of ewes that lamb twins may be impregnated by different males, there is still scarce information on how these interactions affect the final distribution of paternities. Overall, although males’ interactions have important consequences on reproduction and genetic improvement, there is still the need for more knowledge on the practical consequences of social interactions.
{"title":"Dominance, hierarchy, and reproduction in rams and goat bucks","authors":"R. Ungerfeld","doi":"10.21451/1809-3000.rbra2021.020","DOIUrl":"https://doi.org/10.21451/1809-3000.rbra2021.020","url":null,"abstract":"The reproductive results in sheep or goat flocks is consequence of multiple factors, including the interactions between males, and how these interactions modify the sexual behavior of other males. The present review summarizes information on the dominance relationships between rams or bucks, and how these relationships affect their reproductive outcomes. Dominance relationships affect the access of some males to estrous females, influencing the total distribution of sperm among the flock. The review provides information on how dominance relationships are established during the development period, and also after mixing previously unknown males. The period of relationships establishment is extremely stressful for rams and bucks, and destabilize the social relationships, affecting even sperm quality. Dominant and subordinate males display different strategies to impregnate females, but females also participate in mate choice decisions with proceptive behaviors, selecting subordinate males, favoring the maintenance of genetic diversity. Although a high proportion of ewes that lamb twins may be impregnated by different males, there is still scarce information on how these interactions affect the final distribution of paternities. Overall, although males’ interactions have important consequences on reproduction and genetic improvement, there is still the need for more knowledge on the practical consequences of social interactions.","PeriodicalId":153636,"journal":{"name":"Revista Brasileira de Reprodução Animal","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126043877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.21451/1809-3000.rbra2022.039
Mónica De los REYES S
{"title":"Avances en el manejo de gametos caninos in vitro","authors":"Mónica De los REYES S","doi":"10.21451/1809-3000.rbra2022.039","DOIUrl":"https://doi.org/10.21451/1809-3000.rbra2022.039","url":null,"abstract":"","PeriodicalId":153636,"journal":{"name":"Revista Brasileira de Reprodução Animal","volume":"43 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116734679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.21451/1809-3000.rbra2021.019
C. C. Campos, Santos Ricarda Maria dos
{"title":"Doenças do pós-parto e seus efeitos sobre a eficiência reprodutiva de vacas leiteiras","authors":"C. C. Campos, Santos Ricarda Maria dos","doi":"10.21451/1809-3000.rbra2021.019","DOIUrl":"https://doi.org/10.21451/1809-3000.rbra2021.019","url":null,"abstract":"","PeriodicalId":153636,"journal":{"name":"Revista Brasileira de Reprodução Animal","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131532708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.21451/1809-3000.rbra2022.023
Leonardo Reis Silva, Wilton Figueiredo Lima, Sebastião Tavares Rolim, Haroldo Francisco Lobato Ribeiro, O. M. Ohashi
The immunocastration procedure has been used as an alternative technique widely favorable to animal welfare, as it is painless, minimally invasive and with similar efficacy to surgical castration
免疫阉割手术已被广泛用作一种有利于动物福利的替代技术，因为它是无痛的，微创的，与手术阉割相似的疗效
{"title":"Efeitos da castração imunológica no epitélio seminífero de machos bubalinos","authors":"Leonardo Reis Silva, Wilton Figueiredo Lima, Sebastião Tavares Rolim, Haroldo Francisco Lobato Ribeiro, O. M. Ohashi","doi":"10.21451/1809-3000.rbra2022.023","DOIUrl":"https://doi.org/10.21451/1809-3000.rbra2022.023","url":null,"abstract":"The immunocastration procedure has been used as an alternative technique widely favorable to animal welfare, as it is painless, minimally invasive and with similar efficacy to surgical castration","PeriodicalId":153636,"journal":{"name":"Revista Brasileira de Reprodução Animal","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133605194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.21451/1809-3000.rbra2022.031
W. Niżański
Male dog fertility disorders are usually troublesome and challenging for a practicing veterinarian. It may be generally assumed, that reproductive potential in this species is lower than in farm animals and it is still decreasing. This situation starts to be similar to human medicine, where we observe dramatic drop of reproductive capacity, which resulted in the need of implementation of Assisted Reproductive Technologies (ART). Situation in dogs is more complicated owing the fact, that the use of ART meets many obstacles. Low fertility potential in dogs appears to be the result of variable factors such as: specific criteria of selection for reproduction in which fertility performance in not a priority, lack of periodical obligatory fertility check, species specific predisposition for many reproductive diseases and no age limit for reproductive use of males. Dogs are kept in human environment and exposition for civilizational by-products influences negatively not only on our health, but also on health our ‘minor brothers’. It should be bear in mind, that reproductive organs are very sensitive for environmental factors disrupting homeostatic balance. The decline in male dog fertility over the past decades was proved, with potential link to environmental contaminants (4). They were found in pet foods and were also detected in the sperm and testes of adult dogs causing a detrimental effects on sperm function. Over the 26 years of the study of Lea et al. (4), authors found a decrease in the percentage of normal motile sperm. Between 1988 and 1998, sperm motility declined by 2.5 per cent per year. Then from 2002 to 2014 sperm motility continued to decline at a rate of 1.2% per year. In addition, the male pups had an increased incidence of cryptorchidism. Basics of physiology of reproduction of male dogs. Normally the puberty in males is associated with presence of normal sperm cells in genital organs. It is reached in male dogs at age around 5-6 months. Such a young dog obviously cannot be used for reproduction. Reproductive maturity is associated later, with development of normal sexual behavior and production of sufficient number of normal, fertilizing competent spermatozoa. It corresponds with 12-18 months of animal age. Testicular descent is completed usually before weaning period, but sometimes testicles may reach scrotum later, but never after the end of 6 month of age. That time inguinal canals start to be so narrow, that caudal passing of gonads is unlikely. Male dogs have only one accessory sexual gland - prostate, which produces vast portion of seminal plasma.
{"title":"Fertility disorders in male dogs","authors":"W. Niżański","doi":"10.21451/1809-3000.rbra2022.031","DOIUrl":"https://doi.org/10.21451/1809-3000.rbra2022.031","url":null,"abstract":"Male dog fertility disorders are usually troublesome and challenging for a practicing veterinarian. It may be generally assumed, that reproductive potential in this species is lower than in farm animals and it is still decreasing. This situation starts to be similar to human medicine, where we observe dramatic drop of reproductive capacity, which resulted in the need of implementation of Assisted Reproductive Technologies (ART). Situation in dogs is more complicated owing the fact, that the use of ART meets many obstacles. Low fertility potential in dogs appears to be the result of variable factors such as: specific criteria of selection for reproduction in which fertility performance in not a priority, lack of periodical obligatory fertility check, species specific predisposition for many reproductive diseases and no age limit for reproductive use of males. Dogs are kept in human environment and exposition for civilizational by-products influences negatively not only on our health, but also on health our ‘minor brothers’. It should be bear in mind, that reproductive organs are very sensitive for environmental factors disrupting homeostatic balance. The decline in male dog fertility over the past decades was proved, with potential link to environmental contaminants (4). They were found in pet foods and were also detected in the sperm and testes of adult dogs causing a detrimental effects on sperm function. Over the 26 years of the study of Lea et al. (4), authors found a decrease in the percentage of normal motile sperm. Between 1988 and 1998, sperm motility declined by 2.5 per cent per year. Then from 2002 to 2014 sperm motility continued to decline at a rate of 1.2% per year. In addition, the male pups had an increased incidence of cryptorchidism. Basics of physiology of reproduction of male dogs. Normally the puberty in males is associated with presence of normal sperm cells in genital organs. It is reached in male dogs at age around 5-6 months. Such a young dog obviously cannot be used for reproduction. Reproductive maturity is associated later, with development of normal sexual behavior and production of sufficient number of normal, fertilizing competent spermatozoa. It corresponds with 12-18 months of animal age. Testicular descent is completed usually before weaning period, but sometimes testicles may reach scrotum later, but never after the end of 6 month of age. That time inguinal canals start to be so narrow, that caudal passing of gonads is unlikely. Male dogs have only one accessory sexual gland - prostate, which produces vast portion of seminal plasma.","PeriodicalId":153636,"journal":{"name":"Revista Brasileira de Reprodução Animal","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115065256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.21451/1809-3000.rbra2021.060
Alexandre Rodrigues Silva, M. R. Luz
{"title":"Particularidades reprodutivas raciais na espécie canina","authors":"Alexandre Rodrigues Silva, M. R. Luz","doi":"10.21451/1809-3000.rbra2021.060","DOIUrl":"https://doi.org/10.21451/1809-3000.rbra2021.060","url":null,"abstract":"","PeriodicalId":153636,"journal":{"name":"Revista Brasileira de Reprodução Animal","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125401363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.21451/1809-3000.rbra2022.029
C. I. Vannucchi
The placental type of carnivores represents a relatively impenetrable barrier to the transfer of maternal immunoglobulins, making dogs and cats extremely dependent on colostrum ingestion and absorption for adequate passive immunity transfer. Therefore, puppies are considered hypogammaglobulinemic, and colostrum ingestion is essential for neonatal survival. The main reason why colostrum replacement should be instituted is the orphanage or absence of maternal care, which can generate different degrees of neonatal intensive care. Therefore, in the case of maternal death, maternal illness or weakness, lack of maternal instinct or rejection of the litter, disorders of the mammary gland, agalactia or hypogalactia and weak or low birth weight puppies. In the absence of colostrum or inadequate colostrum uptake, some alternatives can be adopted to ensure the transfer of passive immunity. Colostrum replacement can be established naturally or artificially, depending on the availability of commercial preparations, colostrum bank or female donors.
{"title":"Reposição de colostro no neonato: o que, quando e como administrar?","authors":"C. I. Vannucchi","doi":"10.21451/1809-3000.rbra2022.029","DOIUrl":"https://doi.org/10.21451/1809-3000.rbra2022.029","url":null,"abstract":"The placental type of carnivores represents a relatively impenetrable barrier to the transfer of maternal immunoglobulins, making dogs and cats extremely dependent on colostrum ingestion and absorption for adequate passive immunity transfer. Therefore, puppies are considered hypogammaglobulinemic, and colostrum ingestion is essential for neonatal survival. The main reason why colostrum replacement should be instituted is the orphanage or absence of maternal care, which can generate different degrees of neonatal intensive care. Therefore, in the case of maternal death, maternal illness or weakness, lack of maternal instinct or rejection of the litter, disorders of the mammary gland, agalactia or hypogalactia and weak or low birth weight puppies. In the absence of colostrum or inadequate colostrum uptake, some alternatives can be adopted to ensure the transfer of passive immunity. Colostrum replacement can be established naturally or artificially, depending on the availability of commercial preparations, colostrum bank or female donors.","PeriodicalId":153636,"journal":{"name":"Revista Brasileira de Reprodução Animal","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126508092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.21451/1809-3000.rbra2021.057
E. Fontaine
Endometritis refers to an inflammation of the uterine mucosa that does not extend beyond the stratum spongiosum. Recent studies indicate it is a common finding in 30-50% of bitches suffering from infertility/subfertility. This disorder is subclinical, and its diagnosis involves sampling the uterus, whether it is by performing a cytology from flushing the organ or histology on collected uterine biopsies. Its pathophysiology remains unclear in 2021. Some cases are associated with cystic endometrial hyperplasia, which leads to disruption in the uterine clearance mechanisms after breeding ; while other appear as a pure inflammatory process. While we don’t have all the answers yet, there is no doubt today that these disorders must be included in the differential diagnosis of infertility in the bitch. The work that has already been done on this topic already offers some idea on how to approach these cases in our veterinary clinics.
{"title":"Diagnosis of endometritis in the bitch","authors":"E. Fontaine","doi":"10.21451/1809-3000.rbra2021.057","DOIUrl":"https://doi.org/10.21451/1809-3000.rbra2021.057","url":null,"abstract":"Endometritis refers to an inflammation of the uterine mucosa that does not extend beyond the stratum spongiosum. Recent studies indicate it is a common finding in 30-50% of bitches suffering from infertility/subfertility. This disorder is subclinical, and its diagnosis involves sampling the uterus, whether it is by performing a cytology from flushing the organ or histology on collected uterine biopsies. Its pathophysiology remains unclear in 2021. Some cases are associated with cystic endometrial hyperplasia, which leads to disruption in the uterine clearance mechanisms after breeding ; while other appear as a pure inflammatory process. While we don’t have all the answers yet, there is no doubt today that these disorders must be included in the differential diagnosis of infertility in the bitch. The work that has already been done on this topic already offers some idea on how to approach these cases in our veterinary clinics.","PeriodicalId":153636,"journal":{"name":"Revista Brasileira de Reprodução Animal","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129797724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.21451/1809-3000.rbra2021.015
Carolini Schultz, Pricila Baldessar, Camila Ribeiro Carvalho de Brito, I. Bianchi
{"title":"Hormônio antimülleriano como marcador de fertilidade em fêmeas suínas","authors":"Carolini Schultz, Pricila Baldessar, Camila Ribeiro Carvalho de Brito, I. Bianchi","doi":"10.21451/1809-3000.rbra2021.015","DOIUrl":"https://doi.org/10.21451/1809-3000.rbra2021.015","url":null,"abstract":"","PeriodicalId":153636,"journal":{"name":"Revista Brasileira de Reprodução Animal","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128504792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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