Determination of reproductive span through morpho-histological studies on the ovaries of captive brown bears (Ursus arctos) - a short communication
The study aimed to determine reproductive span by investigation of the ovarian structures in young and elderly captive brown bear females (Ursus arctos). The ovaries of two 2-year-old females were obtained by ovariectomy and during the necropsies of 31 and 36 year old individuals. All the obtained o...
Published in: | Veterinarski arhiv |
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Language: | English |
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Faculty of Veterinary Medicine University of Zagreb
2019
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fthrcak:oai:hrcak.srce.hr:220037 2023-05-15T18:41:50+02:00 Determination of reproductive span through morpho-histological studies on the ovaries of captive brown bears (Ursus arctos) - a short communication Utvrđivanje raspona dobi i reproduktivne aktivnosti smeđih medvjedica (Ursus arctos) iz zatočeništva pomoću morfohistološke pretrage jajnika - kratko priopćenje Reljić, Slaven Sergiel, Agnieszka Prvanović Babić, Nikica Beck, Ana Kužir, Snježana Radišić, Berislav Maślak, Robert Bednarski, Michał Piasecki, Tomasz Huber, Doroteja Huber, Đuro 2019 application/pdf https://hrcak.srce.hr/220037 https://hrcak.srce.hr/file/321249 eng eng Faculty of Veterinary Medicine University of Zagreb info:eu-repo/semantics/altIdentifier/doi/10.24099/vet.arhiv.0471 https://hrcak.srce.hr/220037 info:eu-repo/semantics/openAccess Full-text papers can be used for personal or educational purposes only. Authors' and publisher's copyrights must be acknowledged. Veterinarski arhiv ISSN 0372-5480 (Print) ISSN 1331-8055 (Online) Volume 89 Issue 2 reproduction puberty ovulation corpus luteum post-reproductive phase reprodukcija pubertet ovulacija žuto tijelo postreproduktivna faza text info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 fthrcak https://doi.org/10.24099/vet.arhiv.0471 2019-05-15T23:01:42Z The study aimed to determine reproductive span by investigation of the ovarian structures in young and elderly captive brown bear females (Ursus arctos). The ovaries of two 2-year-old females were obtained by ovariectomy and during the necropsies of 31 and 36 year old individuals. All the obtained ovaries were examined macroscopically and histologically. Histological examination of the ovaries of young animals (2+ years) revealed the presence of primordial, primary, secondary and tertiary follicles within the ovarian cortex. One ovary showed a mature corpus luteum, indicating recent ovulation, what is, to our knowledge, the first histological proof of the earliest age of ovulation recorded for captive brown bears. Ovarian atrophy accompanied by the development of multiple cystic subsurface epithelial structures (SES) in the case of the old bears in this study indicates that the ovaries of brown bears share similar degenerative and proliferative patterns with domestic canids. The oldest female had records of successful births at the ages of 26 and 28 years. Both recorded birth events represent one of the latest confirmed occurrences of ovulation, conception and birth amongst brown bears. Cilj istraživanja bio je pregledom građe jajnika utvrditi raspon dobi i reproduktivne aktivnosti u mladih i starih ženki smeđega medvjeda (Ursus arctos) iz zatočeništva. Jajnici su dobiveni ovariektomijom dviju dvogodišnjih ženki i tijekom razudbe 31-godišnje te 36-godišnje ženke. Svi su jajnici pregledani makroskopski i histološki. Histološkom pretragom u mladih su životinja u kori jajnika otkriveni primordijalni, primarni, sekundarni i tercijarni folikuli. U jednom je jajniku dokazano zrelo žuto tijelo (corpus luteum), pokazatelj nedavne ovulacije što je, prema nama dostupnim podacima, prvi zabilježen histološki dokaz najranije ovulacije u smeđih medvjeda u zatočeništvu. Atrofija jajnika povezana sa starenjem i praćena razvojem multiplih cističnih supseroznih epitelnih struktura (SES) u starih medvjeda u ovom istraživanju upućuje na to da se u smeđih medvjeda pojavljuju slične degenerativne i proliferativne promjene kao i u domaćih kanida. Najstarija ženka imala je zabilježene uspješne porođaje u dobi od 26 i 28 godina. Oba porođaja pripadaju najkasnijim potvrđenim pojavama uspješne ovulacije, začeća i porođaja u smeđih medvjeda. Article in Journal/Newspaper Ursus arctos Hrčak - Portal of scientific journals of Croatia Veterinarski arhiv 89 2 233 246 |
institution |
Open Polar |
collection |
Hrčak - Portal of scientific journals of Croatia |
op_collection_id |
fthrcak |
language |
English |
topic |
reproduction puberty ovulation corpus luteum post-reproductive phase reprodukcija pubertet ovulacija žuto tijelo postreproduktivna faza |
spellingShingle |
reproduction puberty ovulation corpus luteum post-reproductive phase reprodukcija pubertet ovulacija žuto tijelo postreproduktivna faza Reljić, Slaven Sergiel, Agnieszka Prvanović Babić, Nikica Beck, Ana Kužir, Snježana Radišić, Berislav Maślak, Robert Bednarski, Michał Piasecki, Tomasz Huber, Doroteja Huber, Đuro Determination of reproductive span through morpho-histological studies on the ovaries of captive brown bears (Ursus arctos) - a short communication |
topic_facet |
reproduction puberty ovulation corpus luteum post-reproductive phase reprodukcija pubertet ovulacija žuto tijelo postreproduktivna faza |
description |
The study aimed to determine reproductive span by investigation of the ovarian structures in young and elderly captive brown bear females (Ursus arctos). The ovaries of two 2-year-old females were obtained by ovariectomy and during the necropsies of 31 and 36 year old individuals. All the obtained ovaries were examined macroscopically and histologically. Histological examination of the ovaries of young animals (2+ years) revealed the presence of primordial, primary, secondary and tertiary follicles within the ovarian cortex. One ovary showed a mature corpus luteum, indicating recent ovulation, what is, to our knowledge, the first histological proof of the earliest age of ovulation recorded for captive brown bears. Ovarian atrophy accompanied by the development of multiple cystic subsurface epithelial structures (SES) in the case of the old bears in this study indicates that the ovaries of brown bears share similar degenerative and proliferative patterns with domestic canids. The oldest female had records of successful births at the ages of 26 and 28 years. Both recorded birth events represent one of the latest confirmed occurrences of ovulation, conception and birth amongst brown bears. Cilj istraživanja bio je pregledom građe jajnika utvrditi raspon dobi i reproduktivne aktivnosti u mladih i starih ženki smeđega medvjeda (Ursus arctos) iz zatočeništva. Jajnici su dobiveni ovariektomijom dviju dvogodišnjih ženki i tijekom razudbe 31-godišnje te 36-godišnje ženke. Svi su jajnici pregledani makroskopski i histološki. Histološkom pretragom u mladih su životinja u kori jajnika otkriveni primordijalni, primarni, sekundarni i tercijarni folikuli. U jednom je jajniku dokazano zrelo žuto tijelo (corpus luteum), pokazatelj nedavne ovulacije što je, prema nama dostupnim podacima, prvi zabilježen histološki dokaz najranije ovulacije u smeđih medvjeda u zatočeništvu. Atrofija jajnika povezana sa starenjem i praćena razvojem multiplih cističnih supseroznih epitelnih struktura (SES) u starih medvjeda u ovom istraživanju upućuje na to da se u smeđih medvjeda pojavljuju slične degenerativne i proliferativne promjene kao i u domaćih kanida. Najstarija ženka imala je zabilježene uspješne porođaje u dobi od 26 i 28 godina. Oba porođaja pripadaju najkasnijim potvrđenim pojavama uspješne ovulacije, začeća i porođaja u smeđih medvjeda. |
format |
Article in Journal/Newspaper |
author |
Reljić, Slaven Sergiel, Agnieszka Prvanović Babić, Nikica Beck, Ana Kužir, Snježana Radišić, Berislav Maślak, Robert Bednarski, Michał Piasecki, Tomasz Huber, Doroteja Huber, Đuro |
author_facet |
Reljić, Slaven Sergiel, Agnieszka Prvanović Babić, Nikica Beck, Ana Kužir, Snježana Radišić, Berislav Maślak, Robert Bednarski, Michał Piasecki, Tomasz Huber, Doroteja Huber, Đuro |
author_sort |
Reljić, Slaven |
title |
Determination of reproductive span through morpho-histological studies on the ovaries of captive brown bears (Ursus arctos) - a short communication |
title_short |
Determination of reproductive span through morpho-histological studies on the ovaries of captive brown bears (Ursus arctos) - a short communication |
title_full |
Determination of reproductive span through morpho-histological studies on the ovaries of captive brown bears (Ursus arctos) - a short communication |
title_fullStr |
Determination of reproductive span through morpho-histological studies on the ovaries of captive brown bears (Ursus arctos) - a short communication |
title_full_unstemmed |
Determination of reproductive span through morpho-histological studies on the ovaries of captive brown bears (Ursus arctos) - a short communication |
title_sort |
determination of reproductive span through morpho-histological studies on the ovaries of captive brown bears (ursus arctos) - a short communication |
publisher |
Faculty of Veterinary Medicine University of Zagreb |
publishDate |
2019 |
url |
https://hrcak.srce.hr/220037 https://hrcak.srce.hr/file/321249 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
Veterinarski arhiv ISSN 0372-5480 (Print) ISSN 1331-8055 (Online) Volume 89 Issue 2 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.24099/vet.arhiv.0471 https://hrcak.srce.hr/220037 |
op_rights |
info:eu-repo/semantics/openAccess Full-text papers can be used for personal or educational purposes only. Authors' and publisher's copyrights must be acknowledged. |
op_doi |
https://doi.org/10.24099/vet.arhiv.0471 |
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Veterinarski arhiv |
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89 |
container_issue |
2 |
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