Preliminary report on bottlenose dolphin (Tursiops truncatus) uterine samples for parity analysis
There have been numerous studies on various mammalian species regarding vascular changes in uterine arteries elucidating the effects of parity. In equids, vascular changes of uterine arteries have been demonstrated to occur in uniparous and multiparous mares. The severity of these arteriole changes suggests a link to previous pregnancies. Differences in the number or range of pregnancies can be ascertained through microscopic evaluation of elastin deposition in the arterioles, perivascular fibrosis, and stromal cellularity. There has been little, if any, work performed on parity in the bottlenose dolphin (Tursiops truncatus). The objective of this preliminary study was to determine the feasibility of detecting similar vascular changes in the endometrium of known-aged female bottlenose dolphins to assess parity. Archived formalin fixed samples of uterus were obtained from nine bottlenose dolphins with known age and parity. Four slides were made from each sample and individually stained with four different techniques. From our small sample pool, it appears that uteri from nulliparous animals do not develop perivascular fibrosis. Parous uteri developed perivascular fibrosis and arteriolar elastosis. These changes agree with our expectations that some degeneration (elastosis) and compensation (fibrosis) occurs as a result of uterine expansion of pregnancy. The assessment of this technique for use in bottlenose dolphins would provide an important tool in the determination of the reproductive success of dolphin populations, identify individuals who are sexually mature but nulliparous, which could indicate reproductive dysfunction or increased calving intervals, and increase our knowledge on the role contaminants play in reproductive dysfunction.
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Language: | English |
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NOAA/National Ocean Service
2004
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Subjects: | Fisheries, Health, Management, |
Online Access: | http://hdl.handle.net/1834/30504 |
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dig-aquadocs-1834-305042021-06-30T02:25:15Z Preliminary report on bottlenose dolphin (Tursiops truncatus) uterine samples for parity analysis Meisner, Rene McFee, Wayne E. Fisheries Health Management There have been numerous studies on various mammalian species regarding vascular changes in uterine arteries elucidating the effects of parity. In equids, vascular changes of uterine arteries have been demonstrated to occur in uniparous and multiparous mares. The severity of these arteriole changes suggests a link to previous pregnancies. Differences in the number or range of pregnancies can be ascertained through microscopic evaluation of elastin deposition in the arterioles, perivascular fibrosis, and stromal cellularity. There has been little, if any, work performed on parity in the bottlenose dolphin (Tursiops truncatus). The objective of this preliminary study was to determine the feasibility of detecting similar vascular changes in the endometrium of known-aged female bottlenose dolphins to assess parity. Archived formalin fixed samples of uterus were obtained from nine bottlenose dolphins with known age and parity. Four slides were made from each sample and individually stained with four different techniques. From our small sample pool, it appears that uteri from nulliparous animals do not develop perivascular fibrosis. Parous uteri developed perivascular fibrosis and arteriolar elastosis. These changes agree with our expectations that some degeneration (elastosis) and compensation (fibrosis) occurs as a result of uterine expansion of pregnancy. The assessment of this technique for use in bottlenose dolphins would provide an important tool in the determination of the reproductive success of dolphin populations, identify individuals who are sexually mature but nulliparous, which could indicate reproductive dysfunction or increased calving intervals, and increase our knowledge on the role contaminants play in reproductive dysfunction. 2021-06-24T16:52:28Z 2021-06-24T16:52:28Z 2004 monograph http://hdl.handle.net/1834/30504 en NOAA Technical Memorandum NOS NCCOS http://permanent.access.gpo.gov/lps66709/NOAA_TM_NOS_NCCOS3.pdf application/pdf application/pdf 10 NOAA/National Ocean Service Silver Spring, MD http://aquaticcommons.org/id/eprint/14629 403 2014-02-21 21:33:33 14629 United States National Ocean Service |
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Fisheries Health Management Fisheries Health Management Meisner, Rene McFee, Wayne E. Preliminary report on bottlenose dolphin (Tursiops truncatus) uterine samples for parity analysis |
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There have been numerous studies on various mammalian species regarding vascular changes in uterine arteries elucidating the effects of parity. In equids, vascular changes of uterine arteries have been demonstrated to occur in uniparous and multiparous mares. The severity of these arteriole changes suggests a link to previous pregnancies. Differences in the number or range of pregnancies can be ascertained through microscopic evaluation of elastin deposition in the arterioles, perivascular fibrosis, and stromal cellularity. There has been little, if any, work performed on parity in the bottlenose dolphin (Tursiops truncatus). The objective of this preliminary study was to determine the feasibility of detecting similar vascular changes in the endometrium of known-aged female bottlenose dolphins to assess parity. Archived formalin fixed samples of uterus were obtained from nine bottlenose dolphins with known age and parity. Four slides were made from each sample and individually stained with four different techniques. From our small sample pool, it appears that uteri from nulliparous animals do not develop perivascular fibrosis. Parous uteri developed perivascular fibrosis and arteriolar elastosis. These changes agree with our expectations that some degeneration (elastosis) and compensation (fibrosis) occurs as a result of uterine expansion of pregnancy. The assessment of this technique for use in bottlenose dolphins would provide an important tool in the determination of the reproductive success of dolphin populations, identify individuals who are sexually mature but nulliparous, which could indicate reproductive dysfunction or increased calving intervals, and increase our knowledge on the role contaminants play in reproductive dysfunction. |
format |
monograph |
topic_facet |
Fisheries Health Management |
author |
Meisner, Rene McFee, Wayne E. |
author_facet |
Meisner, Rene McFee, Wayne E. |
author_sort |
Meisner, Rene |
title |
Preliminary report on bottlenose dolphin (Tursiops truncatus) uterine samples for parity analysis |
title_short |
Preliminary report on bottlenose dolphin (Tursiops truncatus) uterine samples for parity analysis |
title_full |
Preliminary report on bottlenose dolphin (Tursiops truncatus) uterine samples for parity analysis |
title_fullStr |
Preliminary report on bottlenose dolphin (Tursiops truncatus) uterine samples for parity analysis |
title_full_unstemmed |
Preliminary report on bottlenose dolphin (Tursiops truncatus) uterine samples for parity analysis |
title_sort |
preliminary report on bottlenose dolphin (tursiops truncatus) uterine samples for parity analysis |
publisher |
NOAA/National Ocean Service |
publishDate |
2004 |
url |
http://hdl.handle.net/1834/30504 |
work_keys_str_mv |
AT meisnerrene preliminaryreportonbottlenosedolphintursiopstruncatusuterinesamplesforparityanalysis AT mcfeewaynee preliminaryreportonbottlenosedolphintursiopstruncatusuterinesamplesforparityanalysis |
_version_ |
1756078702032060416 |