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author
Lehette, Pascal
author
Hernandez-Leon, Santiago
2009-12-17
2009-12-17T13:22:30Z
2009
http://hdl.handle.net/10553/2833
The measurement of mesozooplankton biomass in the ocean requires the use of analytical procedures that
destroy the samples. Alternatively, the development of methods to estimate biomass from optical systems and
appropriate conversion factors could be a compromise between the accuracy of analytical methods and the need
to preserve the samples for further taxonomic studies. The conversion of the body area recorded by an optical
counter or a camera, by converting the digitized area of an organism into individual biomass, was suggested as
a suitable method to estimate total biomass. In this study, crustacean mesozooplankton from subtropical waters
were analyzed, and individual dry weight and body area were compared. The obtained relationships agreed with
other measurements of biomass obtained from a previous study in Antarctic waters. Gelatinous mesozooplankton
from subtropical and Antarctic waters were also sampled and processed for body area and biomass. As
expected, differences between crustacean and gelatinous plankton were highly significant. Transparent gelatinous
organisms have a lower dry weight per unit area. Therefore, to estimate biomass from digitized images,
pattern recognition discerning, at least, between crustaceans and gelatinous forms is required.
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Previous issue date: 2009
"Limnology and oceanography methods" Vol. 7, p. 304-308
240119 Zoología marina
Muestras de laboratorio
Métodos ópticos
Regiones antárticas
Zooplancton marino
Zooplankton biomass estimation from digitized images: a comparison between subtropical and Antarctic organisms
Artículo