Plasma concentration of progesterone and 17ß-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycle
Plasma concentration of progesterone and 17β-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycle. The agouti is a game animal that have been raised in captivity for conservation and sustainability purposes. However, the management of wild animals in an intensive breedi...
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Vicerractoría Investigación
2011-03-01
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| Series: | Revista de Biología Tropical |
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| Online Access: | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442011000100003&lng=en&tlng=en |
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| author | Diva Anelie Guimarães Rosemar Luz Ramos Otávio Mitio Ohashi Gary Wayne Garcia William Gomes Vale |
| author_facet | Diva Anelie Guimarães Rosemar Luz Ramos Otávio Mitio Ohashi Gary Wayne Garcia William Gomes Vale |
| author_sort | Diva Anelie Guimarães |
| collection | DOAJ |
| description | Plasma concentration of progesterone and 17β-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycle. The agouti is a game animal that have been raised in captivity for conservation and sustainability purposes. However, the management of wild animals in an intensive breeding system requires an assertive knowledge of its reproductive parameters, one of the most important features for production improvement. Besides, little information is available regarding changes in reproductive hormone profiles in agouti. The objective of this study was to evaluate the hormonal profile of progesterone and 17β-estradiol during the estrous cycle of the agouti (Dasyprocta prymnolopha). The hormones were analyzed by radioimmunoassay. Blood samples were collected without sedation twice a week. The concentrations of progesterone were as follows: proestrus 0.78+0.39ng/ml, estrus 2.83+2.34ng/ml, metestrus 1.49+1.24ng/ml, diestrus 3.71+1.48ng/ml. In the estrous phase, an increase in the progesterone level was observed during a period of 24h. The average 17 β-estradiol levels were as follows: proestrus 2 030.98+961.00pg/ml, estrus 1 910.56+650.54pg/ml, metestrus 1 724.83+767.28pg/ml, diestrus 1 939.94+725.29pg/ml. The current results suggest that the progesterone plasma concentration during the estrous cycle in the agouti has a similar increasing, stabilizing and decreasing pattern, as in domestic mammals. Agoutis have two phases of follicular development, as two periods of 17β-estradiol peaks were observed, the first one in the metestrus and the second during the proestrus. Spontaneous ovulation seems to occur after the progesterone peak, possibly indicating that this hormone is associated with the ovulatory process. A more detailed investigation is needed for better understanding of how progesterone influences ovulation. Studies on the involvement of progesterone in follicular rupture can be carried out, using steroid biosynthesis inhibitors and observing the effect of this hormone on ovarian activity of proteolytic enzymes in the follicular wall. Rev. Biol. Trop. 59 (1): 29-35. Epub 2011 March 01. |
| first_indexed | 2024-03-12T20:25:51Z |
| format | Article |
| id | doaj.art-e35d9e63800748b29e95c03347d99c51 |
| institution | Directory Open Access Journal |
| issn | 0034-7744 |
| language | English |
| last_indexed | 2024-03-12T20:25:51Z |
| publishDate | 2011-03-01 |
| publisher | Vicerractoría Investigación |
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| series | Revista de Biología Tropical |
| spelling | doaj.art-e35d9e63800748b29e95c03347d99c512023-08-02T00:31:35ZengVicerractoría InvestigaciónRevista de Biología Tropical0034-77442011-03-015912935S0034-77442011000100003Plasma concentration of progesterone and 17ß-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycleDiva Anelie Guimarães0Rosemar Luz Ramos1Otávio Mitio Ohashi2Gary Wayne Garcia3William Gomes Vale4Federal University of ParáFederal University of ParáFederal University of ParáUniversity of the West IndiesWest Federal University of ParáPlasma concentration of progesterone and 17β-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycle. The agouti is a game animal that have been raised in captivity for conservation and sustainability purposes. However, the management of wild animals in an intensive breeding system requires an assertive knowledge of its reproductive parameters, one of the most important features for production improvement. Besides, little information is available regarding changes in reproductive hormone profiles in agouti. The objective of this study was to evaluate the hormonal profile of progesterone and 17β-estradiol during the estrous cycle of the agouti (Dasyprocta prymnolopha). The hormones were analyzed by radioimmunoassay. Blood samples were collected without sedation twice a week. The concentrations of progesterone were as follows: proestrus 0.78+0.39ng/ml, estrus 2.83+2.34ng/ml, metestrus 1.49+1.24ng/ml, diestrus 3.71+1.48ng/ml. In the estrous phase, an increase in the progesterone level was observed during a period of 24h. The average 17 β-estradiol levels were as follows: proestrus 2 030.98+961.00pg/ml, estrus 1 910.56+650.54pg/ml, metestrus 1 724.83+767.28pg/ml, diestrus 1 939.94+725.29pg/ml. The current results suggest that the progesterone plasma concentration during the estrous cycle in the agouti has a similar increasing, stabilizing and decreasing pattern, as in domestic mammals. Agoutis have two phases of follicular development, as two periods of 17β-estradiol peaks were observed, the first one in the metestrus and the second during the proestrus. Spontaneous ovulation seems to occur after the progesterone peak, possibly indicating that this hormone is associated with the ovulatory process. A more detailed investigation is needed for better understanding of how progesterone influences ovulation. Studies on the involvement of progesterone in follicular rupture can be carried out, using steroid biosynthesis inhibitors and observing the effect of this hormone on ovarian activity of proteolytic enzymes in the follicular wall. Rev. Biol. Trop. 59 (1): 29-35. Epub 2011 March 01.http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442011000100003&lng=en&tlng=enDasyprocta prymnolophareproducciónciclo estralprogesterona17β-estradiolAmazonia brasileña |
| spellingShingle | Diva Anelie Guimarães Rosemar Luz Ramos Otávio Mitio Ohashi Gary Wayne Garcia William Gomes Vale Plasma concentration of progesterone and 17ß-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycle Revista de Biología Tropical Dasyprocta prymnolopha reproducción ciclo estral progesterona 17β-estradiol Amazonia brasileña |
| title | Plasma concentration of progesterone and 17ß-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycle |
| title_full | Plasma concentration of progesterone and 17ß-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycle |
| title_fullStr | Plasma concentration of progesterone and 17ß-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycle |
| title_full_unstemmed | Plasma concentration of progesterone and 17ß-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycle |
| title_short | Plasma concentration of progesterone and 17ß-estradiol of black-rumped agouti (Dasyprocta prymnolopha) during the estrous cycle |
| title_sort | plasma concentration of progesterone and 17ss estradiol of black rumped agouti dasyprocta prymnolopha during the estrous cycle |
| topic | Dasyprocta prymnolopha reproducción ciclo estral progesterona 17β-estradiol Amazonia brasileña |
| url | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442011000100003&lng=en&tlng=en |
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