Sperm production and quality in European eel ( Anguilla anguilla ) in relation to hormonal treatment
Aquaculture production relies on controlled management of gametogenesis, especially in species where assisted reproduction is needed for obtaining gametes in captivity. The present study used human chorionic gonadotropin (hCG) treatments to induce and sustain spermatogenesis in European eel ( Anguil...
Published in: | Reproduction in Domestic Animals |
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2021
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ftdtupubl:oai:pure.atira.dk:publications/6b78ab07-e3cb-4655-b9c2-9f62da66ac85 2024-09-15T17:39:33+00:00 Sperm production and quality in European eel ( Anguilla anguilla ) in relation to hormonal treatment Koumpiadis, Paraskevas Sganga, Daniela E. Politis, Sebastian N. Gallego, Victor Butts, Ian A. E. Asturiano, Juan F. Batjakas, Ioannis E. Tomkiewicz, Jonna 2021 application/pdf https://orbit.dtu.dk/en/publications/6b78ab07-e3cb-4655-b9c2-9f62da66ac85 https://doi.org/10.1111/rda.14011 https://backend.orbit.dtu.dk/ws/files/256800357/rda.14011.pdf eng eng https://orbit.dtu.dk/en/publications/6b78ab07-e3cb-4655-b9c2-9f62da66ac85 info:eu-repo/semantics/openAccess Koumpiadis , P , Sganga , D E , Politis , S N , Gallego , V , Butts , I A E , Asturiano , J F , Batjakas , I E & Tomkiewicz , J 2021 , ' Sperm production and quality in European eel ( Anguilla anguilla ) in relation to hormonal treatment ' , Reproduction in Domestic Animals , vol. 56 , no. 12 , pp. 1497-1505 . https://doi.org/10.1111/rda.14011 Anguilla anguilla CASA Hemocytometer Sperm density Sperm motility Spermatocrit article 2021 ftdtupubl https://doi.org/10.1111/rda.14011 2024-08-13T00:03:06Z Aquaculture production relies on controlled management of gametogenesis, especially in species where assisted reproduction is needed for obtaining gametes in captivity. The present study used human chorionic gonadotropin (hCG) treatments to induce and sustain spermatogenesis in European eel ( Anguilla anguilla ). The aim was to evaluate effects of strip-spawning timing (12 vs. 24 h) after weekly administration of hCG and the necessity of a primer dose (in addition to weekly hormonal treatment) prior to strip-spawning (primer vs. no-primer) on sperm quality parameters. Sperm parameters included milt production (weight), density, and sperm kinematics at Week 9, 11, and 13 after onset of treatment. Spermiation commenced in 11.5% of males in Week 5 and by Week 9, all males produced milt. Male weight, milt production, sperm density, and spermatocrit did not differ among hormonal treatments during the experimental period. Overall, male weight decreased from 106.3 to 93.0 g, milt weight increased from 3.5 to 5.4 g, sperm density counts decreased from 11.7 × 10 9 to 10.5 × 10 9 cells/mL, and spermatocrit decreased from 46.5 to 40.5%. Furthermore, spermatocrit was positively related to hemocytometer counts (R2 = 0.86, P < 0.001), providing a reliable indicator of sperm density. Differences in sperm kinematics were observed depending on strip-spawning timing after hormonal injection (12 vs. 24 h) but with no consistent pattern. These sperm quality parameters also did not consistently differ between the no-primer and primer treatments. Considering that each male may be stripped 4-5 times over the 2-3 months spawning season, omitting the primer would reduce animal handling, material costs, and labour intensity, while sustaining high quality sperm production. Article in Journal/Newspaper Anguilla anguilla European eel Technical University of Denmark: DTU Orbit Reproduction in Domestic Animals 56 12 1497 1505 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Anguilla anguilla CASA Hemocytometer Sperm density Sperm motility Spermatocrit |
spellingShingle |
Anguilla anguilla CASA Hemocytometer Sperm density Sperm motility Spermatocrit Koumpiadis, Paraskevas Sganga, Daniela E. Politis, Sebastian N. Gallego, Victor Butts, Ian A. E. Asturiano, Juan F. Batjakas, Ioannis E. Tomkiewicz, Jonna Sperm production and quality in European eel ( Anguilla anguilla ) in relation to hormonal treatment |
topic_facet |
Anguilla anguilla CASA Hemocytometer Sperm density Sperm motility Spermatocrit |
description |
Aquaculture production relies on controlled management of gametogenesis, especially in species where assisted reproduction is needed for obtaining gametes in captivity. The present study used human chorionic gonadotropin (hCG) treatments to induce and sustain spermatogenesis in European eel ( Anguilla anguilla ). The aim was to evaluate effects of strip-spawning timing (12 vs. 24 h) after weekly administration of hCG and the necessity of a primer dose (in addition to weekly hormonal treatment) prior to strip-spawning (primer vs. no-primer) on sperm quality parameters. Sperm parameters included milt production (weight), density, and sperm kinematics at Week 9, 11, and 13 after onset of treatment. Spermiation commenced in 11.5% of males in Week 5 and by Week 9, all males produced milt. Male weight, milt production, sperm density, and spermatocrit did not differ among hormonal treatments during the experimental period. Overall, male weight decreased from 106.3 to 93.0 g, milt weight increased from 3.5 to 5.4 g, sperm density counts decreased from 11.7 × 10 9 to 10.5 × 10 9 cells/mL, and spermatocrit decreased from 46.5 to 40.5%. Furthermore, spermatocrit was positively related to hemocytometer counts (R2 = 0.86, P < 0.001), providing a reliable indicator of sperm density. Differences in sperm kinematics were observed depending on strip-spawning timing after hormonal injection (12 vs. 24 h) but with no consistent pattern. These sperm quality parameters also did not consistently differ between the no-primer and primer treatments. Considering that each male may be stripped 4-5 times over the 2-3 months spawning season, omitting the primer would reduce animal handling, material costs, and labour intensity, while sustaining high quality sperm production. |
format |
Article in Journal/Newspaper |
author |
Koumpiadis, Paraskevas Sganga, Daniela E. Politis, Sebastian N. Gallego, Victor Butts, Ian A. E. Asturiano, Juan F. Batjakas, Ioannis E. Tomkiewicz, Jonna |
author_facet |
Koumpiadis, Paraskevas Sganga, Daniela E. Politis, Sebastian N. Gallego, Victor Butts, Ian A. E. Asturiano, Juan F. Batjakas, Ioannis E. Tomkiewicz, Jonna |
author_sort |
Koumpiadis, Paraskevas |
title |
Sperm production and quality in European eel ( Anguilla anguilla ) in relation to hormonal treatment |
title_short |
Sperm production and quality in European eel ( Anguilla anguilla ) in relation to hormonal treatment |
title_full |
Sperm production and quality in European eel ( Anguilla anguilla ) in relation to hormonal treatment |
title_fullStr |
Sperm production and quality in European eel ( Anguilla anguilla ) in relation to hormonal treatment |
title_full_unstemmed |
Sperm production and quality in European eel ( Anguilla anguilla ) in relation to hormonal treatment |
title_sort |
sperm production and quality in european eel ( anguilla anguilla ) in relation to hormonal treatment |
publishDate |
2021 |
url |
https://orbit.dtu.dk/en/publications/6b78ab07-e3cb-4655-b9c2-9f62da66ac85 https://doi.org/10.1111/rda.14011 https://backend.orbit.dtu.dk/ws/files/256800357/rda.14011.pdf |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
Koumpiadis , P , Sganga , D E , Politis , S N , Gallego , V , Butts , I A E , Asturiano , J F , Batjakas , I E & Tomkiewicz , J 2021 , ' Sperm production and quality in European eel ( Anguilla anguilla ) in relation to hormonal treatment ' , Reproduction in Domestic Animals , vol. 56 , no. 12 , pp. 1497-1505 . https://doi.org/10.1111/rda.14011 |
op_relation |
https://orbit.dtu.dk/en/publications/6b78ab07-e3cb-4655-b9c2-9f62da66ac85 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/rda.14011 |
container_title |
Reproduction in Domestic Animals |
container_volume |
56 |
container_issue |
12 |
container_start_page |
1497 |
op_container_end_page |
1505 |
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1810480723863273472 |