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| Souza,Luiz Eduardo Barreto de; Cruz,Jurandir Ferreira da; Teixeira Neto,Milton Rezende; Nunes,Rita de Cássia Santos; Cruz,Maria Helena Coelho. |
| The objective of this study was to characterize the sexual development in Anglo-Nubian male goats raised in semi-intensive system. Eight animals were monitored every fifteen days, from the 12th to the 44th week for age at penis detachment, live weight, scrotal circumference, seminal parameters (volume, aspect, concentration, wave motion, progressive individual motility, vigor and spermatic abnormalities) and serum testosterone levels. Serum testosterone levels were determined in blood samples collected at the 20th, 28th and 38th weeks of age. Penis detachment occurred at 102.9 ± 15.4 days of age. Live weight and scrotal circumference at 20th and 44th weeks of age ranged from 25.9 ± 3.5 to 44.7 ± 4.7 kg and from 21.2 ± 1.6 cm to 26.0 ± 1.5 cm, respectively.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Andrologic parameters; Semen; Spermatic abnormalities; Testosterone. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700019 |
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| Mahmoodpour,Hamid; Vahdatpour,Sina; Jafargholipour,Mohamadali; Vahdatpour,Tohid. |
| ABSTRACT The present study sought to examine the effects of low-protein diets supplemented with natural and synthetic antioxidants on reproductive traits and performance of male Japanese quail. A total of 144 one-day-old quail chicks were randomly assigned to receive four different treatments, including a control diet (a basal diet) without antioxidant supplementation, low-protein diet without antioxidant supplementation, low-protein diet supplemented with the E-selenium antioxidant (a combination of vitamin E and selenium), and low-protein diet supplemented with the antioxidant Loxidan (a combination of propyl galat, ethoxyquin, and citric acid). Throughout the study, feed and water were provided ad libitum from one to 45 days of age. Performance values... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: E-selenium; Loxidan; Performance; Protein; Quail; Testis; Testosterone. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200123 |
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| Dias,Júlio César Oliveira; Veloso,Cristina Mattos; Santos,Madriano Christilis da Rocha; Oliveira,Carlos Thiago Silveira Alvim Mendes de; Silveira,Camila Oliveira; Iglesias,Erick; Maitan,Paula Piccolo; Sanglard,Letícia Maria Pereira. |
| ABSTRACT This study analyzed seasonal variations in the testes, the concentration of sex hormones, the parameters of fresh and thawed semen, and the sexual behavior of male Alpine goats from a temperate region in a tropical climate and possible interference with fertility. The maximum and minimum temperature and luminosity were recorded daily, while seminal, hormonal, and behavioral assessments were carried out every fortnight. The maximum and minimum temperature (°C) and luminosity (h) were recorded daily always at 17.00 h. The scrotal circumference (cm), testicular volume (mL), volume (mL), appearance (creamy, milky, aqueous) and coloration (white, white-yellowish, and yellowish) seminal, turbulence or mass movement (0 to 5), progressive spermatic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gonadotropins; Semen quality; Sexual behavior; Testosterone. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000300192 |
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| Paim,Tiago do Prado; Viana,Pauline; Brandão,Eduardo; Amador,Samara; Barbosa,Tatiana; Cardoso,Caio; Lucci,Carolina Madeira; Souza,Jurandir Rodrigues de; McManus,Concepta; Abdalla,Adibe Luiz; Louvandini,Helder. |
| ABSTRACT Cottonseed coproducts contain gossypol which can have specific effects upon the male reproductive system. We evaluated the reproductive development of male lambs close to puberty fed on three cotton coproducts. Twenty-four 5-month old male lambs received four diets: 20 % of dry matter intake of whole cottonseed (WCS), high oil cottonseed meal (CSC), cottonseed meal (CSM), and a control group (CTL) without any cottonseed coproducts. Free gossypol intake was 16.32, 6.98, 5.47 and 0 mg kg−1 BW−1 d−1 for WCS, CSC, CSM and CTL, respectively. Every 15 days, the animals were weighted and serum and semen samples were collected. After 95 days, testis samples were collected for analysis under light and transmission electron microscopes. The CTL group had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypol; Sperm; Testis; Testosterone; Lamb. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000600489 |
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| Valença,R.M.B.; Silva Junior,V.A.; Araújo,L.P.C.; Reis,J.C.; Guerra,M.M.P.; Soares,P.C.; Costa,A.N.. |
| Aiming to evaluate the effect of the diet protein content on testicular parameters in pigs, 21 non-gelded male Dalland pigs were used and randomly divided into three groups. Males belonging to groups G2 and G3 received a diet with crude protein levels of 15% below and above, respectively, in relation to G1 (control). At 210 days of age, animals were castrated, and testis and epididymis were collected for morphometric and histomorphometry analyses. No difference was observed in relation to the total length of seminiferous tubules (G1=3239.9±333,3m; G2=2989.4±171,7m and G3=3059.5±254.9m), population of Sertoli cell (G1=4.7±0.5x10(9); G2=4.3±0.3x10(9) and G3=4.7±0.5x10(9)), population (G1=31.6±5.58x10(9); G2=27.3±4.0x10(9) and G3=26.4±3.9x10(9)) and volume of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pigs; Sperm production; Sertoli cells; Protein; Testosterone. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000500010 |
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| Costa,D.S.; Paula,T.A.R.. |
| The testosterone levels with nasal gland volume and Leydig cell morphometry in sexually mature capybaras were compared using 10 adult capybaras, aging 28 months. Body and testicular weight were 50kg and 28g, respectively. The gonadosomatic index was 0.11±0.02%, while nasal gland volume was 34.12±13.04ml. Serum testosterone concentration was 25.07±14.73ng/ml. Leydig cell volume density and leydigosomatic index were, respectively, 28.8±8.3% and 0.030±0.007%. Total and individual Leydig cell volumes were 6.88±1.92ml and 2,228.14±272.59x10-12ml, respectively. Leydig cell numbers per testis and per gram of testis were, respectively, 3,079.4±719.9x10(6) and 115.09±31.78x10(6) cells. These results show that increase in serum testosterone concentration is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capybara; Testosterone; Morphometry; Leydig cells; Nasal gland. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000600017 |
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| Reis,L.S.L.S.; Ramos,A.A.; Camargos,A.S.; Oba,E.. |
| ABSTRACT This study evaluated the plasma membrane integrity, acrosomal membrane integrity, and mitochondrial membrane potential of Nelore bull sperm from early puberty to early sexual maturity and their associations with sperm motility and vigor, the mass motility of the spermatozoa (wave motion), scrotal circumference, and testosterone. Sixty Nelore bulls aged 18 to 19 months were divided into four lots (n=15 bulls/lot) and evaluated over 280 days. Semen samples, collected every 56 days by electroejaculation, were evaluated soon after collection for motility, vigor and wave motion under an optical microscope. Sperm membrane integrity, acrosomal integrity, and mitochondrial activity were evaluated under a fluorescent microscope using probe association... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sexual development; Sperm motility; Sperm vigor; Testosterone; Cattle. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000300620 |
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| JAIMOVICH,ENRIQUE; ESPINOSA,ALEJANDRA. |
| We studied the effect of IGF-I, insulin and testosterone on intracellular Ca2+ in cultured muscle cells. Insulin produced a fast (<1 s) and transient [Ca2+] increase lasting less than 10 s. IGF-I induced a transient [Ca2+] increase, reaching a fluorescence peak 6 s after stimulus, to return to basal values after 60 s. Testosterone induced delayed (35 s) and long lasting (100-200 s) signals, frequently associated with oscillations. IGF-I, testosterone and electrical stimulation-induced Ca2+ signals were shown to be dependent on IP3 production. All of these Ca2+ signals were blocked by inhibitors of the IP3 pathway. On the other hand, insulin-induced Ca2+ increase was dependent on ryanodine receptors and blocked by either nifedipine or ryanodine. The... |
| Tipo: Journal article |
Palavras-chave: Skeletal; Transcription factors; Insulin; IGF-I; Testosterone. |
| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000400018 |
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| Rosli,Farah Dayana; Hashim,Noor Hashida; Osman,Khairul; Ibrahim,Siti Fatimah; Kabir,Nurul. |
| Abstract Thymoquinone (TQ), the main constituent of the volatile oil derived from Nigella sativa has shown pharmacological benefits against various diseases while nicotine is an active component in cigarette that is known to be detrimental. This study was conducted to assess the ameliorating effects of TQ on sperm count, membrane, mitochondria and testosterone of nicotine-treated rats. Rats were randomized into four groups: control, nicotine, TQ, and nicotine with TQ. Nicotine (5 mg/kg bwt/day) was subcutaneously injected for 30 days to induce damaging effects on sperm and testosterone level. Rats were force-fed with TQ (5 mg/kg bwt/day) for the following 30 days. Sperm count was reduced in the nicotine group (26.72 ± 1.64 106/mL) but showed a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thymoquinone; Nicotine; Rat sperm; Membrane; Mitochondria; Testosterone. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100304 |
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| Koivisto,Marion Burkhardt; Luvizotto,Maria Cristina Rui; Nogueira,Guilherme Padua; Vicente,Wilter Ricardo Russiano; Costa,Marcelo Tadeu Alvarenga. |
| A bovine, Bos indicus, with bilateral varicocele diagnosticed by palpation and ultrasound observation was observed during 24 months measuring scrotal circumference, semen quality, testosterone concentrations comparing with seasonal variation and other animals of the same species. The abnormal morphology of major defects and minor defects didn't change between the bull and the other animals, however, the total defects were higher during the summer in the bull with varicocele (49,9%±6,9) when compared with the other bulls (27,9%±2,9). The animal showed higher percentage of major defects during the summer, comparing with the other seasons of the year. For the animal with varicocele testosterone levels were significantly higher during the different season's of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Varicocele; Bovine; Semen; Testosterone; Bos indicus. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962002000100005 |
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| MORATO,Ronaldo Gonçalves; GUIMARÃES,Marcelo Alcindo Barros de Vaz; FERREIRA,Fernando; VERRESCHI,Ieda Terezinha do Nascimento; BARNABE,Renato Campanarut. |
| Ejaculate traits, testicular volume and plasma testosterone levels were determined once every two months for one year in 4 adult male jaguars (Panthera onca) housed at the São Paulo Zoo, SP, Brazil. Semen samples was collected by electroejaculation and analyzed for pH, total volume, motility (0-100%), status (0-5), total spermatozoa count and morphology. Blood samples was obtained by cephalic venipuncture immediately before the onset of electroejaculation and stored at -20ºC until assay of testosterone by RIA. Using a calliper, the length and width of each testis was measured and the values were combined to determine the testicular volume. Semen analyses demonstrated a high percentage of structurally abnormal sperm (mean = 51%) and low rates of motility... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jaguars; Semen characters; Testosterone; Season. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95961999000500008 |
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| Registros recuperados: 35 | |
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