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Validation and quantification of extractable age pigments for determining the age of Antarctic krill (Euphausia superba)
Citation
McGaffin, AF and Nicol, S and Virtue, P and Hirano, Y and Matsuda, T and Uchida, I and Candy, SG and Kawaguchi, S, Validation and quantification of extractable age pigments for determining the age of Antarctic krill (Euphausia superba), Marine Biology: International Journal on Life in Oceans and Coastal Waters, 158, (8) pp. 1743-1755. ISSN 0025-3162 (2011) [Refereed Article]
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Copyright Statement
Copyright 2011 Springer-Verlag
DOI: doi:10.1007/s00227-011-1688-5
Abstract
Antarctic krill, Euphausia superba, hatched
from eggs and maintained for four years, were sampled
periodically for age-pigment analysis. Extractable pigments
from the eye and eyestalk ganglia were quantified
using fluorescence intensity and standardised against protein.
Three peak fluorescence intensities were detected at
wavelengths of excitation 280 nm, emission 625 nm (pigment
1); excitation 355 nm, emission 510 nm (pigment 2);
and excitation 463 nm, emission 620 nm (pigment 3).
There was a positive correlation between the quantity of
pigments 1 and 3 and the age of Antarctic krill. A model
was developed to predict age from pigment 3 and to
compare it with other age proxies (carapace length and
eyeball diameter). The quantity of pigment 3 was the best
predictor of age. The pigment method can discriminate
between similar sized krill aged 12 and 36 months. Age
pigments provide an improved tool for age estimation in
Antarctic krill, particularly if used in conjunction with
other demographic information.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Antarctic krill, age determination |
| Research Division: | Biological Sciences |
| Research Group: | Ecology |
| Research Field: | Marine and estuarine ecology (incl. marine ichthyology) |
| Objective Division: | Environmental Management |
| Objective Group: | Management of Antarctic and Southern Ocean environments |
| Objective Field: | Biodiversity in Antarctic and Southern Ocean environments |
| UTAS Author: | McGaffin, AF (Ms Angela McGaffin) |
| UTAS Author: | Virtue, P (Associate Professor Patti Virtue) |
| ID Code: | 76372 |
| Year Published: | 2011 |
| Web of Science® Times Cited: | 4 |
| Deposited By: | IMAS Research and Education Centre |
| Deposited On: | 2012-03-05 |
| Last Modified: | 2012-05-24 |
| Downloads: | 0 |
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