The ZooCAM, a new in-flow imaging system for fast onboard counting, sizing and classification of fish eggs and metazooplankton
Autor: | G. Guyader, J. Perchoc, Jean-Baptiste Romagnan, Bertrand Forest, Florent Colas, S. Le Mestre, Morgan Tardivel, Michel Lunven, Pierre Petitgas, Elvire Antajan, Marc Sourisseau, Paul Bourriau, Martin Huret, Marie-Madeleine Danielou |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences biology Ecology Ecosystemic survey 010604 marine biology & hydrobiology ZooCAM Sardine Frequency data Geology Aquatic Science biology.organism_classification 01 natural sciences Zooplankton Sizing Flow imaging On board Fish eggs Oceanography Anchovy Fish In-flow imaging 0105 earth and related environmental sciences Remote sensing |
Zdroj: | Progress In Oceanography (0079-6611) (Pergamon-elsevier Science Ltd), 2018-09, Vol. 166, P. 54-65 |
Popis: | In this paper we present the ZooCAM, a system designed to digitize and analyse on board large volume samples of preserved and living metazooplankton (i.e. multicellular zooplankton) and fish eggs >300 µm ESD. The ZooCAM has been specifically designed to overcome the difficulties to analyse zooplankton and fish eggs in the framework of the PELGAS survey, and provide high frequency data. The ZooCAM fish eggs counts were comparable to those done with a dissecting microscope. The ZooCAM enabled the accurate prediction and fast on board validation of staged anchovy and sardine eggs in almost real time after collection. A comparison with the ZooScan, on a more complex zooplanktonic community, provided encouraging results on the agreement between the 2 instruments. ZooCAM and ZooScan enabled the identification of similar communities and produced similar total zooplankton abundances, size distributions, and size spectra slopes, when tested on the same samples. However these results need to be further refined due to the small number of samples used to compare the two instruments. The main ZooCAM drawback resides in a slight but sensible underestimation of abundances and sizes, and therefore individual and community biovolumes. The ZooCAM have been successfully deployed over 4 years, on numerous surveys without suffering any major failure. When used in line with the CUFES it provided high resolution maps of staged fish eggs and zooplanktonic functional groups. Hence the ZooCAM is an appropriate tool for the development of on board, high frequency, high spatial coverage zooplanktonic and ecosystemic studies. |
Databáze: | OpenAIRE |
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