Underwater observations of gelatinous zooplankton: Sampling problems, feeding biology, and behavior1
نویسندگان
چکیده
منابع مشابه
Collection and culture techniques for gelatinous zooplankton.
Gelatinous zooplankton are the least understood of all planktonic animal groups. This is partly due to their fragility, which typically precludes the capture of intact specimens with nets or trawls. Specialized tools and techniques have been developed that allow researchers and aquarists to collect intact gelatinous animals at sea and to maintain many of these alive in the laboratory. This pape...
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During the past several decades, high numbers of gelatinous zooplankton species have been reported in many estuarine and coastal ecosystems. Coupled with media-driven public perception, a paradigm has evolved in which the global ocean ecosystems are thought to be heading toward being dominated by “nuisance” jellyfish. We question this current paradigm by presenting a broad overview of gelatinou...
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Transparency measurements (at 400 to 700 nm) were made on living specimens of 29 common species of gelatinous zooplankton from the Northwestern Atlantic Ocean and Gulf of Mexico. Percent transparency ranged from 91% for the hydromedusa Sibogota typa to 0.51% for the pteropod Clione limacina. Percent transparency was linearly and positively correlated with wavelength, with slopes of the regressi...
متن کاملModel of optimal current feeding in zooplankton
Zooplankton feeding formulations in plankton models have exclusively focused on the relation between food concentration and ingestion, with respiration and excretion being treated separately, despite experimental evidence for strong links among these processes. We present an optimal current-feeding model linking ingestion, respiration, and assimilation efficiency to foraging activity. The Ivlev...
متن کاملBioluminescence spectra of shallow and deep-sea gelatinous zooplankton: ctenophores, medusae and siphonophores
We have examined the variability and potential adaptive signi®cance of the wavelengths of light produced by gelatinous zooplankton. Bioluminescence spectra were measured from 100 species of planktonic cnidarians and ctenophores collected between 1 and 3500 m depth. Species averages of maximal wavelengths for all groups ranged from 440 to 506 nm. Ctenophores (41 species) had characteristically l...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 1975
ISSN: 0024-3590
DOI: 10.4319/lo.1975.20.6.0907