Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba
Using known-age Antarctic krill ( Euphausia superba ) grown from eggs hatched at two different laboratories, we validate the annual pattern of bands deposited in the eyestalks of krill and determine the absolute age of these animals. Ages two through five years were validated, and these animals rang...
Published in: | PLOS ONE |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Public Library of Science
2017
|
Subjects: | |
Online Access: | https://doi.org/10.1371/journal.pone.0171773 http://www.ncbi.nlm.nih.gov/pubmed/28225825 http://ecite.utas.edu.au/125804 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:125804 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:125804 2023-05-15T13:42:41+02:00 Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba Kilada, R Reiss, CS Kawaguchi, S King, RA Matsuda, T Ichii, T 2017 application/pdf https://doi.org/10.1371/journal.pone.0171773 http://www.ncbi.nlm.nih.gov/pubmed/28225825 http://ecite.utas.edu.au/125804 en eng Public Library of Science http://ecite.utas.edu.au/125804/1/journal.pone.0171773.pdf http://dx.doi.org/10.1371/journal.pone.0171773 Kilada, R and Reiss, CS and Kawaguchi, S and King, RA and Matsuda, T and Ichii, T, Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba , PLoS ONE, 12, (2) Article 0171773. ISSN 1932-6203 (2017) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/28225825 http://ecite.utas.edu.au/125804 Biological Sciences Evolutionary biology Animal systematics and taxonomy Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1371/journal.pone.0171773 2022-12-12T23:17:07Z Using known-age Antarctic krill ( Euphausia superba ) grown from eggs hatched at two different laboratories, we validate the annual pattern of bands deposited in the eyestalks of krill and determine the absolute age of these animals. Ages two through five years were validated, and these animals ranged from 37.1 to 62.6 mm in total length. The band counts in these individuals were either identical to their absolute ages, or only failed to agree by a few months, which demonstrates the accuracy of this method. Precision and bias were estimated graphically using Changs index (Coefficient of Variation = 5.03%). High accuracy and precision between readers and low ageing bias indicate that longitudinal sections of eyestalks can be used to age krill in wild samples and to develop age-based stock assessment models for krill. Archival samples preserved in formalin (5%) and stored in ambient conditions were also readable. Ageing preserved krill will provide the opportunity to examine changes in growth among krill populations within the Southern Ocean and to retrospectively examine changes in krill production over the last century to better understand the historical and future impacts of climate change on this critical Southern Ocean species. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean eCite UTAS (University of Tasmania) Antarctic Southern Ocean PLOS ONE 12 2 e0171773 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Evolutionary biology Animal systematics and taxonomy |
spellingShingle |
Biological Sciences Evolutionary biology Animal systematics and taxonomy Kilada, R Reiss, CS Kawaguchi, S King, RA Matsuda, T Ichii, T Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba |
topic_facet |
Biological Sciences Evolutionary biology Animal systematics and taxonomy |
description |
Using known-age Antarctic krill ( Euphausia superba ) grown from eggs hatched at two different laboratories, we validate the annual pattern of bands deposited in the eyestalks of krill and determine the absolute age of these animals. Ages two through five years were validated, and these animals ranged from 37.1 to 62.6 mm in total length. The band counts in these individuals were either identical to their absolute ages, or only failed to agree by a few months, which demonstrates the accuracy of this method. Precision and bias were estimated graphically using Changs index (Coefficient of Variation = 5.03%). High accuracy and precision between readers and low ageing bias indicate that longitudinal sections of eyestalks can be used to age krill in wild samples and to develop age-based stock assessment models for krill. Archival samples preserved in formalin (5%) and stored in ambient conditions were also readable. Ageing preserved krill will provide the opportunity to examine changes in growth among krill populations within the Southern Ocean and to retrospectively examine changes in krill production over the last century to better understand the historical and future impacts of climate change on this critical Southern Ocean species. |
format |
Article in Journal/Newspaper |
author |
Kilada, R Reiss, CS Kawaguchi, S King, RA Matsuda, T Ichii, T |
author_facet |
Kilada, R Reiss, CS Kawaguchi, S King, RA Matsuda, T Ichii, T |
author_sort |
Kilada, R |
title |
Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba |
title_short |
Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba |
title_full |
Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba |
title_fullStr |
Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba |
title_full_unstemmed |
Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba |
title_sort |
validation of band counts in eyestalks for the determination of age of antarctic krill, euphausia superba |
publisher |
Public Library of Science |
publishDate |
2017 |
url |
https://doi.org/10.1371/journal.pone.0171773 http://www.ncbi.nlm.nih.gov/pubmed/28225825 http://ecite.utas.edu.au/125804 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
op_relation |
http://ecite.utas.edu.au/125804/1/journal.pone.0171773.pdf http://dx.doi.org/10.1371/journal.pone.0171773 Kilada, R and Reiss, CS and Kawaguchi, S and King, RA and Matsuda, T and Ichii, T, Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba , PLoS ONE, 12, (2) Article 0171773. ISSN 1932-6203 (2017) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/28225825 http://ecite.utas.edu.au/125804 |
op_doi |
https://doi.org/10.1371/journal.pone.0171773 |
container_title |
PLOS ONE |
container_volume |
12 |
container_issue |
2 |
container_start_page |
e0171773 |
_version_ |
1766171638742646784 |