Controlled reproduction in Anguilla anguilla (L.): comparison between spontaneous spawning and stripping‐insemination approaches
This study aimed to compare the fertility of eggs between artificially matured female silver eels that spawned spontaneously and those that were spawned by manual stripping. The effects of the two methods of spawning on ovulation and fertilization rate were also investigated. For this purpose, 18 wi...
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Online Access: | https://www.openaccessrepository.it/record/103531 https://doi.org/10.1111/are.12755 |
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ftopenaccessrep:oai:zenodo.org:103531 2023-10-25T01:28:58+02:00 Controlled reproduction in Anguilla anguilla (L.): comparison between spontaneous spawning and stripping‐insemination approaches P. M. Lokman Antonio Casalini Andrea Di Biase Pietro Emmanuele Oliviero Mordenti Michaela Mandelli 2015-04-07 https://www.openaccessrepository.it/record/103531 https://doi.org/10.1111/are.12755 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/103531 doi:10.1111/are.12755 info:eu-repo/semantics/openAccess Aquatic Science info:eu-repo/semantics/article publication-article 2015 ftopenaccessrep https://doi.org/10.1111/are.12755 2023-09-26T22:18:37Z This study aimed to compare the fertility of eggs between artificially matured female silver eels that spawned spontaneously and those that were spawned by manual stripping. The effects of the two methods of spawning on ovulation and fertilization rate were also investigated. For this purpose, 18 wild female European els captured in Bonello lagoon (North Adriatic Sea) were carp pituitary extract-injected to undergo sexual maturation and ovulation; a final injection of 17,20b-dihydroxy-4-pregnen-3-one (DHP) was administered when at least 30% of the oocytes were fully transparent. After the DHP-injection, nine eels were transferred to a new closed recirculating aquaculture system, where they were housed with spermiating males (sex ratio 4/1) to allow spontaneous spawning (SPT-group); the remaining nine eels were transferred to a 250 L tank and ovulation was checked at four-hourly intervals by manual stripping (STR-group). The number of eggs per female in the SPT-group was significantly greater than that in the STRgroup. Furthermore, fertilization rates in the SPT-group were notably higher than those observed in the STR-group. Significantly, the best performances were obtained among eels in which at least 50% of oocytes were fully transparent at the time DHP was administered. We conclude that the fertility of eggs from spontaneously spawning eels is superior to that of eggs acquired by strip-spawning and artificial fertilization. Article in Journal/Newspaper Anguilla anguilla Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Aquaculture Research 47 10 3052 3060 |
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Open Polar |
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Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science P. M. Lokman Antonio Casalini Andrea Di Biase Pietro Emmanuele Oliviero Mordenti Michaela Mandelli Controlled reproduction in Anguilla anguilla (L.): comparison between spontaneous spawning and stripping‐insemination approaches |
topic_facet |
Aquatic Science |
description |
This study aimed to compare the fertility of eggs between artificially matured female silver eels that spawned spontaneously and those that were spawned by manual stripping. The effects of the two methods of spawning on ovulation and fertilization rate were also investigated. For this purpose, 18 wild female European els captured in Bonello lagoon (North Adriatic Sea) were carp pituitary extract-injected to undergo sexual maturation and ovulation; a final injection of 17,20b-dihydroxy-4-pregnen-3-one (DHP) was administered when at least 30% of the oocytes were fully transparent. After the DHP-injection, nine eels were transferred to a new closed recirculating aquaculture system, where they were housed with spermiating males (sex ratio 4/1) to allow spontaneous spawning (SPT-group); the remaining nine eels were transferred to a 250 L tank and ovulation was checked at four-hourly intervals by manual stripping (STR-group). The number of eggs per female in the SPT-group was significantly greater than that in the STRgroup. Furthermore, fertilization rates in the SPT-group were notably higher than those observed in the STR-group. Significantly, the best performances were obtained among eels in which at least 50% of oocytes were fully transparent at the time DHP was administered. We conclude that the fertility of eggs from spontaneously spawning eels is superior to that of eggs acquired by strip-spawning and artificial fertilization. |
format |
Article in Journal/Newspaper |
author |
P. M. Lokman Antonio Casalini Andrea Di Biase Pietro Emmanuele Oliviero Mordenti Michaela Mandelli |
author_facet |
P. M. Lokman Antonio Casalini Andrea Di Biase Pietro Emmanuele Oliviero Mordenti Michaela Mandelli |
author_sort |
P. M. Lokman |
title |
Controlled reproduction in Anguilla anguilla (L.): comparison between spontaneous spawning and stripping‐insemination approaches |
title_short |
Controlled reproduction in Anguilla anguilla (L.): comparison between spontaneous spawning and stripping‐insemination approaches |
title_full |
Controlled reproduction in Anguilla anguilla (L.): comparison between spontaneous spawning and stripping‐insemination approaches |
title_fullStr |
Controlled reproduction in Anguilla anguilla (L.): comparison between spontaneous spawning and stripping‐insemination approaches |
title_full_unstemmed |
Controlled reproduction in Anguilla anguilla (L.): comparison between spontaneous spawning and stripping‐insemination approaches |
title_sort |
controlled reproduction in anguilla anguilla (l.): comparison between spontaneous spawning and stripping‐insemination approaches |
publishDate |
2015 |
url |
https://www.openaccessrepository.it/record/103531 https://doi.org/10.1111/are.12755 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/103531 doi:10.1111/are.12755 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/are.12755 |
container_title |
Aquaculture Research |
container_volume |
47 |
container_issue |
10 |
container_start_page |
3052 |
op_container_end_page |
3060 |
_version_ |
1780730244770037760 |