The biochemical estimation of age in Euphausiids: Laboratory calibration and field comparisons SCIE SCOPUS

Cited 19 time in WEB OF SCIENCE Cited 19 time in Scopus
Title
The biochemical estimation of age in Euphausiids: Laboratory calibration and field comparisons
Author(s)
Harvey, H. R.; Ju, Se-J.; Son, S-K.; Feinberg, L. R.; Shaw, C. T.; Peterson, W. T.
KIOST Author(s)
Son, Seung Kyu(손승규)
Publication Year
2010-04
Abstract
Euphausiids play a key role in many marine ecosystems as a link between primary producers and top predators. Understanding their demographic (i.e. age) structure is an essential tool to assess growth and recruitment as well as to determine how changes in environmental conditions might alter their condition and distribution. Age determination of crustaceans cannot be accomplished using traditional approaches, and here we evaluate the potential for biochemical products of tissue metabolism (termed lipofuscins) to determine the demographic structure of euphausiids in field collections. Lipofuscin was extracted from krill neural tissues (eye and eye-stalk), quantified using fluorescent intensity and normalized to tissue protein content to allow comparisons across animal sizes. Multiple fluorescent components from krill were observed, with the major product having a maximum fluorescence at excitation of 355 nm and emission of 510 nm. Needed age calibration of lipofuscin accumulation in Euphausia pacifica was accomplished using known-age individuals hatched and reared in the laboratory for over one year. Lipofuscin content extracted from neural tissues of laboratory-reared animals was highly correlated with the chronological age of animals (r=0.87). Calibrated with laboratory lipofuscin accumulation rates, field-collected sub-adult and adult E. pacifica in the Northeast Pacific were estimated to be older than 100 days and younger than 1 year. Comparative data for the Antarctic krill, E. superba showed much higher lipofuscin values suggesting a much longer lifespan than the more temperate species, E. pacifica. These regional comparisons suggest that biochemical indices allow a practical approach to estimate population age structure of diverse populations, and combined with other measurements can provide estimates of vital rates (i.e. longevity, mortality, growth) for krill populations in dynamic environments. (C) 2009 Elsevier Ltd. All rights reserved.
ISSN
0967-0645
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4116
DOI
10.1016/j.dsr2.2009.10.015
Bibliographic Citation
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, v.57, no.7-8, pp.663 - 671, 2010
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Subject
CRAB CALLINECTES-SAPIDUS; ANTARCTIC KRILL; EXTRACTABLE LIPOFUSCIN; SUPERBA; VARIABILITY; CRUSTACEANS; PACIFICA; GROWTH; ACCUMULATION; LONGEVITY
Keywords
Euphausiids; Euphausia pacifica; Euphausia superba; Ageing; Lipofuscin; Demographic structure
Type
Article
Language
English
Document Type
Article
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Related Researcher
Research Interests

marine chemistry,Environmental Monitoring,resource development,해양화학,환경모니터링,자원개발

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