Saved in:
| Main Author: | |
|---|---|
| Format: | Recurso digital |
| Language: | English |
| Published: |
Zenodo
2022
|
| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.6835678 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866901204171227136 |
|---|---|
| author | Stuart, Justin |
| author_facet | Stuart, Justin |
| contents | <p>Surfperches are a family of predominantly marine fishes with a reproductive mode that is uncommon in teleosts (i.e., viviparity). Investigating spermatogenesis and sperm packaging is important to gain a complete understanding of viviparity. My study characterized the testicular development of black perch (<em>Embiotoca jacksoni</em>), dwarf perch (<em>Micrometrus minimus</em>), and walleye surfperch (<em>Hyperprosopon argenteum</em>) using paraffin histological techniques. The testes of reproductive dwarf perch accounted for 6.1 ± 2% of their body weight (i.e., gonadosomatic index), black perch testes were 1.3 ± 0.7%, and walleye surfperch testes were 1.4 ± 0.9% of their body weight. Surfperch sperm cell development was similar to spermatogenesis described in other teleost and vertebrate species. Spermatozeugmata formation occurred within the cysts of the surfperch testes. Upon release into sperm ducts, spermatozeugmata were associated with a periodic acid-Schiff-positive substance that may serve a protective function for spermatozoa and enhance sperm longevity. Spermatozeugmata also had a collagen component that may assist in maintaining the integrity of spermatozeugmata during transfer into the female reproductive tract. Male black perch and walleye surfperch were found to be reproductive during the fall whereas dwarf perch were reproductive during spring and summer. The difference in reproductive seasonality between the three species may be a result of extended sperm storage of female dwarf perches which does not appear to occur in black perch or walleye surfperch. Overall, my study provides details on spermatogenesis and formation of the spermatozeugmata that is transferred into the female reproductive tract, thus providing insight into the reproduction of marine viviparous surfperches.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_6835678 |
| institution | Zenodo |
| language | eng |
| publishDate | 2022 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | SPERM DEVELOPMENT AND PACKAGING IN THREE SURFPERCH SPECIES (TELEOSTEI: EMBIOTOCIDAE) Stuart, Justin surfperch spermatogenesis spermatozeugmata viviparity <p>Surfperches are a family of predominantly marine fishes with a reproductive mode that is uncommon in teleosts (i.e., viviparity). Investigating spermatogenesis and sperm packaging is important to gain a complete understanding of viviparity. My study characterized the testicular development of black perch (<em>Embiotoca jacksoni</em>), dwarf perch (<em>Micrometrus minimus</em>), and walleye surfperch (<em>Hyperprosopon argenteum</em>) using paraffin histological techniques. The testes of reproductive dwarf perch accounted for 6.1 ± 2% of their body weight (i.e., gonadosomatic index), black perch testes were 1.3 ± 0.7%, and walleye surfperch testes were 1.4 ± 0.9% of their body weight. Surfperch sperm cell development was similar to spermatogenesis described in other teleost and vertebrate species. Spermatozeugmata formation occurred within the cysts of the surfperch testes. Upon release into sperm ducts, spermatozeugmata were associated with a periodic acid-Schiff-positive substance that may serve a protective function for spermatozoa and enhance sperm longevity. Spermatozeugmata also had a collagen component that may assist in maintaining the integrity of spermatozeugmata during transfer into the female reproductive tract. Male black perch and walleye surfperch were found to be reproductive during the fall whereas dwarf perch were reproductive during spring and summer. The difference in reproductive seasonality between the three species may be a result of extended sperm storage of female dwarf perches which does not appear to occur in black perch or walleye surfperch. Overall, my study provides details on spermatogenesis and formation of the spermatozeugmata that is transferred into the female reproductive tract, thus providing insight into the reproduction of marine viviparous surfperches.</p> |
| title | SPERM DEVELOPMENT AND PACKAGING IN THREE SURFPERCH SPECIES (TELEOSTEI: EMBIOTOCIDAE) |
| topic | surfperch spermatogenesis spermatozeugmata viviparity |
| url | https://doi.org/10.5281/zenodo.6835678 |