Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean
This study examines age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni from the Scotia Sea in the Southern Ocean, through the analysis of annual growth increments deposited on sagittal otoliths. Otolith pairs from 177 G. braueri and 118...
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Language: | English |
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Online Access: | http://hdl.handle.net/10400.8/5069 https://doi.org/10.1111/jfb.14206 |
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ftpinstleiria:oai:iconline.ipleiria.pt:10400.8/5069 2023-05-15T18:15:59+02:00 Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean Saunders, Ryan A. Lourenço, Sílvia Vieira, Rui P. Collins, Martin A. Assis, Carlos A. Xavier, Jose C. 2020 http://hdl.handle.net/10400.8/5069 https://doi.org/10.1111/jfb.14206 eng eng Wiley UID/MAR/04292/2019 Saunders, R.A. & Lourenço, S. & Vieira, R.P. & Collins, A.M. & Assis, C.A. & Xavier, J.C. (2020). Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean. Journal of Fish Biology. 96. 364-377. 10.1111/jfb.14206. 1095-8649 http://hdl.handle.net/10400.8/5069 doi:10.1111/jfb.14206 closedAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Body size Growth Morphology Myctophidae Otoliths Southern Ocean article 2020 ftpinstleiria https://doi.org/10.1111/jfb.14206 2022-05-15T05:18:33Z This study examines age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni from the Scotia Sea in the Southern Ocean, through the analysis of annual growth increments deposited on sagittal otoliths. Otolith pairs from 177 G. braueri and 118 K. anderssoni were collected in different seasons from the region between 2004 and 2009. Otolith‐edge analysis suggested a seasonal change in opaque and hyaline depositions, indicative of an annual growth pattern, although variation within the populations of both species was apparent. Age estimates varied from 1 to 6 years for G. braueri (40 to 139 mm standard length; L s) and from 0 to 2 years for K. anderssoni (26 to 70 mm L s). Length‐at‐age data were broadly consistent with population cohort parameters identified in concurrent length‐frequency data from the region for both species. The estimated values of von Bertalanffy growth curves for G. braueri were L∞ = 133.22 mm, k = 0.29 year−1 and t 0 = − 0.21 year and the values for K. anderssoni were L∞ = 68.60 mm, k = 0.71 year−1 and t 0 = − 0.49 year. There were no significant (P > 0.05) differences in growth between sexes for either species, suggesting that males and females have similar growth and development trajectories in the Scotia Sea. A positive allometric relationship between Ls and wet mass was found for each species, as well as a significant (P < 0.0001) linear relationship between otolith size and L s. Growth performance (Ф ′) was similar between the two species and congruent with other myctophid species across the Southern Ocean. This study provides important parameters for future Southern Ocean ecosystem studies in a resource management context. info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper Scotia Sea Southern Ocean Instituto Politécnico de Leiria: IC-online Scotia Sea Southern Ocean Journal of Fish Biology 96 2 364 377 |
institution |
Open Polar |
collection |
Instituto Politécnico de Leiria: IC-online |
op_collection_id |
ftpinstleiria |
language |
English |
topic |
Body size Growth Morphology Myctophidae Otoliths Southern Ocean |
spellingShingle |
Body size Growth Morphology Myctophidae Otoliths Southern Ocean Saunders, Ryan A. Lourenço, Sílvia Vieira, Rui P. Collins, Martin A. Assis, Carlos A. Xavier, Jose C. Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean |
topic_facet |
Body size Growth Morphology Myctophidae Otoliths Southern Ocean |
description |
This study examines age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni from the Scotia Sea in the Southern Ocean, through the analysis of annual growth increments deposited on sagittal otoliths. Otolith pairs from 177 G. braueri and 118 K. anderssoni were collected in different seasons from the region between 2004 and 2009. Otolith‐edge analysis suggested a seasonal change in opaque and hyaline depositions, indicative of an annual growth pattern, although variation within the populations of both species was apparent. Age estimates varied from 1 to 6 years for G. braueri (40 to 139 mm standard length; L s) and from 0 to 2 years for K. anderssoni (26 to 70 mm L s). Length‐at‐age data were broadly consistent with population cohort parameters identified in concurrent length‐frequency data from the region for both species. The estimated values of von Bertalanffy growth curves for G. braueri were L∞ = 133.22 mm, k = 0.29 year−1 and t 0 = − 0.21 year and the values for K. anderssoni were L∞ = 68.60 mm, k = 0.71 year−1 and t 0 = − 0.49 year. There were no significant (P > 0.05) differences in growth between sexes for either species, suggesting that males and females have similar growth and development trajectories in the Scotia Sea. A positive allometric relationship between Ls and wet mass was found for each species, as well as a significant (P < 0.0001) linear relationship between otolith size and L s. Growth performance (Ф ′) was similar between the two species and congruent with other myctophid species across the Southern Ocean. This study provides important parameters for future Southern Ocean ecosystem studies in a resource management context. info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
Saunders, Ryan A. Lourenço, Sílvia Vieira, Rui P. Collins, Martin A. Assis, Carlos A. Xavier, Jose C. |
author_facet |
Saunders, Ryan A. Lourenço, Sílvia Vieira, Rui P. Collins, Martin A. Assis, Carlos A. Xavier, Jose C. |
author_sort |
Saunders, Ryan A. |
title |
Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean |
title_short |
Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean |
title_full |
Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean |
title_fullStr |
Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean |
title_full_unstemmed |
Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean |
title_sort |
age and growth of brauer's lanternfish gymnoscopelus braueri and rhombic lanternfish krefftichthys anderssoni (family myctophidae) in the scotia sea, southern ocean |
publisher |
Wiley |
publishDate |
2020 |
url |
http://hdl.handle.net/10400.8/5069 https://doi.org/10.1111/jfb.14206 |
geographic |
Scotia Sea Southern Ocean |
geographic_facet |
Scotia Sea Southern Ocean |
genre |
Scotia Sea Southern Ocean |
genre_facet |
Scotia Sea Southern Ocean |
op_relation |
UID/MAR/04292/2019 Saunders, R.A. & Lourenço, S. & Vieira, R.P. & Collins, A.M. & Assis, C.A. & Xavier, J.C. (2020). Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean. Journal of Fish Biology. 96. 364-377. 10.1111/jfb.14206. 1095-8649 http://hdl.handle.net/10400.8/5069 doi:10.1111/jfb.14206 |
op_rights |
closedAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1111/jfb.14206 |
container_title |
Journal of Fish Biology |
container_volume |
96 |
container_issue |
2 |
container_start_page |
364 |
op_container_end_page |
377 |
_version_ |
1766189361130373120 |