Early ontogeny of the mackerel icefish, Champsocephalus gunnari, in the southern Scotia Arc
International audience During the early ontogeny of fishes, the timing and duration of key events such as larval hatching and the switch from endogenous to exogenous feeding largely determine the offspring viability and survival. The aim of the present study was to investigate the life history trait...
Published in: | Polar Biology |
---|---|
Main Authors: | , , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2013
|
Subjects: | |
Online Access: | https://hal.science/hal-03502631 https://doi.org/10.1007/s00300-013-1304-x |
id |
ftsorbonneuniv:oai:HAL:hal-03502631v1 |
---|---|
record_format |
openpolar |
spelling |
ftsorbonneuniv:oai:HAL:hal-03502631v1 2024-09-15T18:00:17+00:00 Early ontogeny of the mackerel icefish, Champsocephalus gunnari, in the southern Scotia Arc La Mesa, Mario Catalano, Barbara Koubbi, Philippe Jones, Christopher D. Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2013 https://hal.science/hal-03502631 https://doi.org/10.1007/s00300-013-1304-x en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-013-1304-x hal-03502631 https://hal.science/hal-03502631 doi:10.1007/s00300-013-1304-x ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.science/hal-03502631 Polar Biology, 2013, 36 (6), pp.797-805. ⟨10.1007/s00300-013-1304-x⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2013 ftsorbonneuniv https://doi.org/10.1007/s00300-013-1304-x 2024-07-25T23:47:52Z International audience During the early ontogeny of fishes, the timing and duration of key events such as larval hatching and the switch from endogenous to exogenous feeding largely determine the offspring viability and survival. The aim of the present study was to investigate the life history traits of the early larvae of the mackerel icefish, Champsocephalus gunnari, collected in summer south of the South Shetland Islands in the Bransfield Strait and north of Elephant Island. Through the analysis of sagittal otolith microstructure, we assessed the timing and duration of egg incubation, larval hatching, first exogenous feeding, rate of yolk resorption and body growth rate. Compared to populations living further north (i.e. around South Georgia and Kerguelen Islands), mackerel icefish in the southern Scotia Arc exhibits longer egg incubation (lasting 90-120 days from winter to summer) and delayed hatching time spread over a relatively short period lasting 26 days between January and February. The first exogenous feeding takes place between 13 and 24 days after hatching still in the presence of the yolk-sac, indicating a prolonged mixed feeding afterward. The specific growth rate or daily percentage change in size (G) was 1.9 % SL day(-1), corresponding to a daily growth rate at mean size of 0.31 mm day(-1). While showing significant differences in early life history traits across their geographical distribution, C. gunnari populations share a common strategy, spawning a small number of large eggs that hatch in relatively large-sized larvae, at a time which may be independent of the timing of pack-ice retreat and onset of the production cycle. Article in Journal/Newspaper Bransfield Strait Elephant Island Icefish Kerguelen Islands Polar Biology South Shetland Islands HAL Sorbonne Université Polar Biology 36 6 797 805 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography La Mesa, Mario Catalano, Barbara Koubbi, Philippe Jones, Christopher D. Early ontogeny of the mackerel icefish, Champsocephalus gunnari, in the southern Scotia Arc |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience During the early ontogeny of fishes, the timing and duration of key events such as larval hatching and the switch from endogenous to exogenous feeding largely determine the offspring viability and survival. The aim of the present study was to investigate the life history traits of the early larvae of the mackerel icefish, Champsocephalus gunnari, collected in summer south of the South Shetland Islands in the Bransfield Strait and north of Elephant Island. Through the analysis of sagittal otolith microstructure, we assessed the timing and duration of egg incubation, larval hatching, first exogenous feeding, rate of yolk resorption and body growth rate. Compared to populations living further north (i.e. around South Georgia and Kerguelen Islands), mackerel icefish in the southern Scotia Arc exhibits longer egg incubation (lasting 90-120 days from winter to summer) and delayed hatching time spread over a relatively short period lasting 26 days between January and February. The first exogenous feeding takes place between 13 and 24 days after hatching still in the presence of the yolk-sac, indicating a prolonged mixed feeding afterward. The specific growth rate or daily percentage change in size (G) was 1.9 % SL day(-1), corresponding to a daily growth rate at mean size of 0.31 mm day(-1). While showing significant differences in early life history traits across their geographical distribution, C. gunnari populations share a common strategy, spawning a small number of large eggs that hatch in relatively large-sized larvae, at a time which may be independent of the timing of pack-ice retreat and onset of the production cycle. |
author2 |
Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
La Mesa, Mario Catalano, Barbara Koubbi, Philippe Jones, Christopher D. |
author_facet |
La Mesa, Mario Catalano, Barbara Koubbi, Philippe Jones, Christopher D. |
author_sort |
La Mesa, Mario |
title |
Early ontogeny of the mackerel icefish, Champsocephalus gunnari, in the southern Scotia Arc |
title_short |
Early ontogeny of the mackerel icefish, Champsocephalus gunnari, in the southern Scotia Arc |
title_full |
Early ontogeny of the mackerel icefish, Champsocephalus gunnari, in the southern Scotia Arc |
title_fullStr |
Early ontogeny of the mackerel icefish, Champsocephalus gunnari, in the southern Scotia Arc |
title_full_unstemmed |
Early ontogeny of the mackerel icefish, Champsocephalus gunnari, in the southern Scotia Arc |
title_sort |
early ontogeny of the mackerel icefish, champsocephalus gunnari, in the southern scotia arc |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-03502631 https://doi.org/10.1007/s00300-013-1304-x |
genre |
Bransfield Strait Elephant Island Icefish Kerguelen Islands Polar Biology South Shetland Islands |
genre_facet |
Bransfield Strait Elephant Island Icefish Kerguelen Islands Polar Biology South Shetland Islands |
op_source |
ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.science/hal-03502631 Polar Biology, 2013, 36 (6), pp.797-805. ⟨10.1007/s00300-013-1304-x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-013-1304-x hal-03502631 https://hal.science/hal-03502631 doi:10.1007/s00300-013-1304-x |
op_doi |
https://doi.org/10.1007/s00300-013-1304-x |
container_title |
Polar Biology |
container_volume |
36 |
container_issue |
6 |
container_start_page |
797 |
op_container_end_page |
805 |
_version_ |
1810437460269727744 |