Concurrent temporal patterns in light absorbance and fish abundance
2006; Inter-Research; Volume: 325; Linguagem: Inglês
10.3354/meps325181
ISSN1616-1599
Autores Tópico(s)Marine and fisheries research
ResumoMEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 325:181-186 (2006) - doi:10.3354/meps325181 Concurrent temporal patterns in light absorbance and fish abundance Tom A. Sørnes*, Dag L. Aksnes Department of Biology, University of Bergen, PO Box 7800, 5020 Bergen, Norway *Email: tom.sornes@bio.uib.no ABSTRACT: The abundance of midwater fishes in fjord basins, as well as the abundance and size of mesozooplankton, have previously been related to optical properties of the basin water. Herein, we report on concurrent temporal changes in light absorbance and fish abundance for Masfjorden and modest changes in both variables for Lurefjorden and Sognefjorden, western Norway. The inverse relationship between fish abundance and absorbance in the temporal data, spanning 9 yr, is consistent with the relationship previously described for spatial data representing different fjords. The combination of salinity and oxygen accounted for 94% of the observed variance in absorbance of the 3 fjords, and we suggest that these variables serve as proxies for regional and local determinants of absorbance in fjord basins, respectively. While salinity indicates basin water origin and its optical properties, oxygen is a measure of turnover time and local degradation of organic matter, presumably affecting absorbance. KEY WORDS: Light absorbance · Fish abundance · Fjords Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 325. Online publication date: November 07, 2006 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2006 Inter-Research.
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