Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba
| Autor: | Tsuyoshi Matsuda, Taro Ichii, So Kawaguchi, Robert King, Christian S. Reiss, Raouf Kilada |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Glycerol Aging Atmospheric Science Physiology Euphausia lcsh:Medicine Molting 01 natural sciences Geographical Locations Marine Conservation Oceans Medicine and Health Sciences lcsh:Science Climatology Biomass (ecology) Marine Ecosystems Multidisciplinary Ecology Marine fish Band counts Physical sciences Antarctic Ocean Chemistry Research Article Stock assessment Krill Climate Change Zoology Antarctic Regions Marine Biology Monomers (Chemistry) Biology 010603 evolutionary biology Ecosystems Bodies of water Animals Polymer chemistry 010604 marine biology & hydrobiology Ecology and Environmental Sciences lcsh:R Biology and Life Sciences Fisheries Science American lobster biology.organism_classification Marine and aquatic sciences Earth sciences Antarctic krill People and Places Antarctica lcsh:Q Physiological Processes Euphausiacea |
| Zdroj: | PLoS ONE, Vol 12, Iss 2, p e0171773 (2017) PLoS ONE |
| ISSN: | 1932-6203 |
| Popis: | 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 Chang’s 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|