Effect of advancing the breeding season on reproductive performance of dromedary camels
This study examines the effect of advancing the breeding season on the reproductive performance of dromedary camels under an intensive management system. Using a synchronization protocol, timed natural mating in female camels was carried out either in September (2 months ahead of the natural breedin...
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| Veröffentlicht in: | Theriogenology 2022-02, Vol.179, p.230-236 |
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| creator | Manjunatha, B.M. Al-Hosni, Ali Al-Bulushi, Samir |
| description | This study examines the effect of advancing the breeding season on the reproductive performance of dromedary camels under an intensive management system. Using a synchronization protocol, timed natural mating in female camels was carried out either in September (2 months ahead of the natural breeding season, n = 182) or December (peak breeding season, n = 115). The ovarian responses (size of the dominant follicle at the time of mating and ovulation), pregnancy rate, and pregnancy losses were evaluated using ultrasonography. Blood samples were collected after mating to assess progesterone concentrations by RIA. The libido of male camels (n = 13) was evaluated objectively. Results showed that the percentage of female camels with an optimal sized follicle (11–17 mm) for breeding at the time of mating was lower in September compared to December (81.9 vs 91.3%, P = 0.03). The libido of male camels was lower in September than in December (P |
| doi_str_mv | 10.1016/j.theriogenology.2021.12.007 |
| format | Article |
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•Camels were bred in September (2 months ahead of season) and December (peak season) months.•Size of ovulated follicle, progesterone levels and pregnancy rate were lower in September.•The libido and fertility rate of male camels was affected in September.•Pregnancy loss was not affected by advancing the breeding season to September.•Camels can be bred in September with acceptable pregnancy rates.]]></description><identifier>ISSN: 0093-691X</identifier><identifier>EISSN: 1879-3231</identifier><identifier>DOI: 10.1016/j.theriogenology.2021.12.007</identifier><identifier>PMID: 34896745</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Abortion, Veterinary ; Animals ; Camelus ; Dromedary camel ; Female ; Fertility ; Male ; Ovarian Follicle ; Pregnancy ; Progesterone ; Reproduction ; Season ; Seasons ; Timed breeding</subject><ispartof>Theriogenology, 2022-02, Vol.179, p.230-236</ispartof><rights>2021</rights><rights>Copyright © 2021. Published by Elsevier Inc.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c327t-75a3179ee81a9d6ed15473dee51db5eed6a5f7f396da43777060d24523d34c6b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.theriogenology.2021.12.007$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/34896745$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Manjunatha, B.M.</creatorcontrib><creatorcontrib>Al-Hosni, Ali</creatorcontrib><creatorcontrib>Al-Bulushi, Samir</creatorcontrib><title>Effect of advancing the breeding season on reproductive performance of dromedary camels</title><title>Theriogenology</title><addtitle>Theriogenology</addtitle><description><![CDATA[This study examines the effect of advancing the breeding season on the reproductive performance of dromedary camels under an intensive management system. Using a synchronization protocol, timed natural mating in female camels was carried out either in September (2 months ahead of the natural breeding season, n = 182) or December (peak breeding season, n = 115). The ovarian responses (size of the dominant follicle at the time of mating and ovulation), pregnancy rate, and pregnancy losses were evaluated using ultrasonography. Blood samples were collected after mating to assess progesterone concentrations by RIA. The libido of male camels (n = 13) was evaluated objectively. Results showed that the percentage of female camels with an optimal sized follicle (11–17 mm) for breeding at the time of mating was lower in September compared to December (81.9 vs 91.3%, P = 0.03). The libido of male camels was lower in September than in December (P <0.001). The ovulation rate (86.3 vs 93.9%, P = 0.04), size of the ovulated follicle (12.7 ± 0.1 vs 13.7 ± 0.2 mm, P <0.001), pregnancy rates on Day 14 (47.8 vs 72.2%, P <0.001) and Day 90 (38.5 vs 60.9%, P <0.001) after mating was lower in September compared to December. However, pregnancy loss was not affected between months (15.7 vs 19.5%, P = 0.3). Among pregnant camels, the progesterone concentrations on Days 6, 8, 10, 12 and 14 after mating were lower in September as compared to December (P <0.001). In non-pregnant camels, the progesterone concentrations on Days 6, 8 and 10 after mating were also lower in September as compared to December (P <0.001). In conclusion, advancing the breeding season by two months, significantly affects the reproductive performance of dromedary camels, yet, acceptable pregnancy rates can be achieved.
•Camels were bred in September (2 months ahead of season) and December (peak season) months.•Size of ovulated follicle, progesterone levels and pregnancy rate were lower in September.•The libido and fertility rate of male camels was affected in September.•Pregnancy loss was not affected by advancing the breeding season to September.•Camels can be bred in September with acceptable pregnancy rates.]]></description><subject>Abortion, Veterinary</subject><subject>Animals</subject><subject>Camelus</subject><subject>Dromedary camel</subject><subject>Female</subject><subject>Fertility</subject><subject>Male</subject><subject>Ovarian Follicle</subject><subject>Pregnancy</subject><subject>Progesterone</subject><subject>Reproduction</subject><subject>Season</subject><subject>Seasons</subject><subject>Timed breeding</subject><issn>0093-691X</issn><issn>1879-3231</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkF9LwzAUxYMobk6_gvTBB19a86dNVvBFxqbCwBdF30Ka3M6MtplJN9i3N2VT8E0IXALn3HPuD6EbgjOCCb9bZ_0neOtW0LnGrfYZxZRkhGYYixM0JlNRpowycorGGJcs5SX5GKGLENYYY8Y5OUcjlk9LLvJijN7ndQ26T1ydKLNTnbbdKokBSeUBzPAJoILrkvg8bLwzW93bHSQb8LXzbXTAYDbetWCU3ydatdCES3RWqybA1XFO0Nti_jp7Spcvj8-zh2WqGRV9KgrFiCgBpkSVhoMhRS6YASiIqYrYgKuiFjUruVE5E0Jgjg3NC8oMyzWv2ATdHvbGal9bCL1sbdDQNKoDtw2SclzmHItIYoLuD1LtXQgearnxto2VJcFyQCvX8i9aOaCVhMqINtqvj0nbKp76a_5hGQWLgyCeDzsLXgZtIfIx1kfE0jj7v6RvKDKUuQ</recordid><startdate>202202</startdate><enddate>202202</enddate><creator>Manjunatha, B.M.</creator><creator>Al-Hosni, Ali</creator><creator>Al-Bulushi, Samir</creator><general>Elsevier Inc</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>202202</creationdate><title>Effect of advancing the breeding season on reproductive performance of dromedary camels</title><author>Manjunatha, B.M. ; Al-Hosni, Ali ; Al-Bulushi, Samir</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c327t-75a3179ee81a9d6ed15473dee51db5eed6a5f7f396da43777060d24523d34c6b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Abortion, Veterinary</topic><topic>Animals</topic><topic>Camelus</topic><topic>Dromedary camel</topic><topic>Female</topic><topic>Fertility</topic><topic>Male</topic><topic>Ovarian Follicle</topic><topic>Pregnancy</topic><topic>Progesterone</topic><topic>Reproduction</topic><topic>Season</topic><topic>Seasons</topic><topic>Timed breeding</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Manjunatha, B.M.</creatorcontrib><creatorcontrib>Al-Hosni, Ali</creatorcontrib><creatorcontrib>Al-Bulushi, Samir</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Theriogenology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Manjunatha, B.M.</au><au>Al-Hosni, Ali</au><au>Al-Bulushi, Samir</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of advancing the breeding season on reproductive performance of dromedary camels</atitle><jtitle>Theriogenology</jtitle><addtitle>Theriogenology</addtitle><date>2022-02</date><risdate>2022</risdate><volume>179</volume><spage>230</spage><epage>236</epage><pages>230-236</pages><issn>0093-691X</issn><eissn>1879-3231</eissn><abstract><![CDATA[This study examines the effect of advancing the breeding season on the reproductive performance of dromedary camels under an intensive management system. Using a synchronization protocol, timed natural mating in female camels was carried out either in September (2 months ahead of the natural breeding season, n = 182) or December (peak breeding season, n = 115). The ovarian responses (size of the dominant follicle at the time of mating and ovulation), pregnancy rate, and pregnancy losses were evaluated using ultrasonography. Blood samples were collected after mating to assess progesterone concentrations by RIA. The libido of male camels (n = 13) was evaluated objectively. Results showed that the percentage of female camels with an optimal sized follicle (11–17 mm) for breeding at the time of mating was lower in September compared to December (81.9 vs 91.3%, P = 0.03). The libido of male camels was lower in September than in December (P <0.001). The ovulation rate (86.3 vs 93.9%, P = 0.04), size of the ovulated follicle (12.7 ± 0.1 vs 13.7 ± 0.2 mm, P <0.001), pregnancy rates on Day 14 (47.8 vs 72.2%, P <0.001) and Day 90 (38.5 vs 60.9%, P <0.001) after mating was lower in September compared to December. However, pregnancy loss was not affected between months (15.7 vs 19.5%, P = 0.3). Among pregnant camels, the progesterone concentrations on Days 6, 8, 10, 12 and 14 after mating were lower in September as compared to December (P <0.001). In non-pregnant camels, the progesterone concentrations on Days 6, 8 and 10 after mating were also lower in September as compared to December (P <0.001). In conclusion, advancing the breeding season by two months, significantly affects the reproductive performance of dromedary camels, yet, acceptable pregnancy rates can be achieved.
•Camels were bred in September (2 months ahead of season) and December (peak season) months.•Size of ovulated follicle, progesterone levels and pregnancy rate were lower in September.•The libido and fertility rate of male camels was affected in September.•Pregnancy loss was not affected by advancing the breeding season to September.•Camels can be bred in September with acceptable pregnancy rates.]]></abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>34896745</pmid><doi>10.1016/j.theriogenology.2021.12.007</doi><tpages>7</tpages></addata></record> |
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| subjects | Abortion, Veterinary Animals Camelus Dromedary camel Female Fertility Male Ovarian Follicle Pregnancy Progesterone Reproduction Season Seasons Timed breeding |
| title | Effect of advancing the breeding season on reproductive performance of dromedary camels |
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