Fecundity regulation by atresia in turbot Scophthalmus maximus in the Baltic Sea
Down-regulation of fecundity through oocyte resorption was assessed in Baltic Sea turbot Scophthalmus maximus at three locations in the period from late vitellogenesis in April to spawning during June to July. The mean±s.d. total length of the sampled fish was 32⋅7±3⋅1 cm and mean±s.d. age was 6⋅2±1...
Published in: | Journal of Fish Biology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2016
|
Subjects: | |
Online Access: | https://orbit.dtu.dk/en/publications/b3d81b05-7cba-4670-9de7-b47cc369f6d9 https://doi.org/10.1111/jfb.12879 |
id |
ftdtupubl:oai:pure.atira.dk:publications/b3d81b05-7cba-4670-9de7-b47cc369f6d9 |
---|---|
record_format |
openpolar |
spelling |
ftdtupubl:oai:pure.atira.dk:publications/b3d81b05-7cba-4670-9de7-b47cc369f6d9 2023-05-15T18:15:44+02:00 Fecundity regulation by atresia in turbot Scophthalmus maximus in the Baltic Sea Nissling, A. Thorsen, A. da Silva, Filipa 2016 https://orbit.dtu.dk/en/publications/b3d81b05-7cba-4670-9de7-b47cc369f6d9 https://doi.org/10.1111/jfb.12879 eng eng info:eu-repo/semantics/closedAccess Nissling , A , Thorsen , A & da Silva , F 2016 , ' Fecundity regulation by atresia in turbot Scophthalmus maximus in the Baltic Sea ' , Journal of Fish Biology , vol. 88 , no. 4 , pp. 1301-1320 . https://doi.org/10.1111/jfb.12879 article 2016 ftdtupubl https://doi.org/10.1111/jfb.12879 2023-01-05T00:04:24Z Down-regulation of fecundity through oocyte resorption was assessed in Baltic Sea turbot Scophthalmus maximus at three locations in the period from late vitellogenesis in April to spawning during June to July. The mean±s.d. total length of the sampled fish was 32⋅7±3⋅1 cm and mean±s.d. age was 6⋅2±1⋅5 years. Measurements of atresia were performed using the ‘profile method’ with the intensity of atresia adjusted according to the ‘dissectormethod’ (10⋅6% adjustment; coefficient of determination was 0⋅675 between methods). Both prevalence (portion of fish with atresia) and intensity (calculated as the average proportion of atretic cells in fish displaying atresia) of atresia were low in prespawning fish, but high from onset of spawning throughout the spawning period. Atretic oocytes categorized as in early alpha and in late alpha state occurred irrespective of maturity stage from late prespawning individuals up to late spawning fish, showing that oocytes may become atretic throughout the spawning period. Observed prevalence of atresia throughout the spawning period was almost 40% with an intensity of c. 20%. This indicates extensive down-regulation, i.e. considerably lower realized (number of eggs spawned) v. potential fecundity (number of developing oocytes), suggesting significant variability in reproductive potential. The extent of fecundity regulation in relation to fish condition (Fulton’s condition factor) is discussed, suggesting an association between levels of atresia and fish condition Article in Journal/Newspaper Scophthalmus maximus Turbot Technical University of Denmark: DTU Orbit Journal of Fish Biology 88 4 1301 1320 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
Down-regulation of fecundity through oocyte resorption was assessed in Baltic Sea turbot Scophthalmus maximus at three locations in the period from late vitellogenesis in April to spawning during June to July. The mean±s.d. total length of the sampled fish was 32⋅7±3⋅1 cm and mean±s.d. age was 6⋅2±1⋅5 years. Measurements of atresia were performed using the ‘profile method’ with the intensity of atresia adjusted according to the ‘dissectormethod’ (10⋅6% adjustment; coefficient of determination was 0⋅675 between methods). Both prevalence (portion of fish with atresia) and intensity (calculated as the average proportion of atretic cells in fish displaying atresia) of atresia were low in prespawning fish, but high from onset of spawning throughout the spawning period. Atretic oocytes categorized as in early alpha and in late alpha state occurred irrespective of maturity stage from late prespawning individuals up to late spawning fish, showing that oocytes may become atretic throughout the spawning period. Observed prevalence of atresia throughout the spawning period was almost 40% with an intensity of c. 20%. This indicates extensive down-regulation, i.e. considerably lower realized (number of eggs spawned) v. potential fecundity (number of developing oocytes), suggesting significant variability in reproductive potential. The extent of fecundity regulation in relation to fish condition (Fulton’s condition factor) is discussed, suggesting an association between levels of atresia and fish condition |
format |
Article in Journal/Newspaper |
author |
Nissling, A. Thorsen, A. da Silva, Filipa |
spellingShingle |
Nissling, A. Thorsen, A. da Silva, Filipa Fecundity regulation by atresia in turbot Scophthalmus maximus in the Baltic Sea |
author_facet |
Nissling, A. Thorsen, A. da Silva, Filipa |
author_sort |
Nissling, A. |
title |
Fecundity regulation by atresia in turbot Scophthalmus maximus in the Baltic Sea |
title_short |
Fecundity regulation by atresia in turbot Scophthalmus maximus in the Baltic Sea |
title_full |
Fecundity regulation by atresia in turbot Scophthalmus maximus in the Baltic Sea |
title_fullStr |
Fecundity regulation by atresia in turbot Scophthalmus maximus in the Baltic Sea |
title_full_unstemmed |
Fecundity regulation by atresia in turbot Scophthalmus maximus in the Baltic Sea |
title_sort |
fecundity regulation by atresia in turbot scophthalmus maximus in the baltic sea |
publishDate |
2016 |
url |
https://orbit.dtu.dk/en/publications/b3d81b05-7cba-4670-9de7-b47cc369f6d9 https://doi.org/10.1111/jfb.12879 |
genre |
Scophthalmus maximus Turbot |
genre_facet |
Scophthalmus maximus Turbot |
op_source |
Nissling , A , Thorsen , A & da Silva , F 2016 , ' Fecundity regulation by atresia in turbot Scophthalmus maximus in the Baltic Sea ' , Journal of Fish Biology , vol. 88 , no. 4 , pp. 1301-1320 . https://doi.org/10.1111/jfb.12879 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/jfb.12879 |
container_title |
Journal of Fish Biology |
container_volume |
88 |
container_issue |
4 |
container_start_page |
1301 |
op_container_end_page |
1320 |
_version_ |
1766188928313851904 |