Seasonal differences in citrate synthase and digestive enzyme activity in larval and postlarval antarctic krill, Euphausia superba
نویسندگان
چکیده
منابع مشابه
Size Selection of Antarctic Krill (Euphausia superba) in Trawls
Trawlers involved in the Antarctic krill (Euphausia superba) fishery use different trawl designs, and very little is known about the size selectivity of the various gears. Size selectivity quantifies a given trawl's ability to catch different sizes of a harvested entity, and this information is crucial for the management of a sustainable fishery. We established a morphological description of kr...
متن کاملThe opsin repertoire of the Antarctic krill Euphausia superba.
The Antarctic krill Euphausia superba experiences almost all marine photic environments throughout its life cycle. Antarctic krill eggs hatch in the aphotic zone up to 1000m depth and larvae develop on their way to the ocean surface (development ascent) and are exposed to different quality (wavelength) and quantity (irradiance) of light. Adults show a daily vertical migration pattern, moving do...
متن کاملLipids as markers of nutritional condition and diet in the Antarctic krill Euphausia superba and Euphausia crystallorophias during austral winter
To understand the nutritional condition and feeding history of Antarctic krill during winter, Euphausia superba and E. crystallorophias were collected by MOCNESS during July–August 2001 in Maguerite Bay southeast of Adelaide Island. Total lipid, lipid classes, fatty acids, fatty alcohols and sterols were analyzed in animals among several life stages. Lipids in seston and major copepods represen...
متن کاملPalmer LTER: Grazing by the antarctic krill Euphausia superba on Nitschia sp. and Phaeocystis sp. monocultures
Figure 3. Cumulative frequency distribution of the mean krill bio mass (g nr2) of 1-km subsamples for the fast (solid line) and slow (dashed line) surveys. Cram, D.L., J.J. Agenbag, I. Hampton, and A.A. Robertson. 1979. SAS Protea Cruise, 1978: The general results of the acoustics and remote sensing study, with recommendations for estimating the abundance of krill {Euphausia superba Dana). Sout...
متن کاملAmong-year variation in growth of Antarctic krill Euphausia superba based on length-frequency data
Understanding the temporal variability in vital rates (e.g. growth and survivorship) of wild populations is practically and statistically difficult but crucial for connecting such variation to mechanistic drivers and their population consequences. For somatic growth, empirical estimates of variation are rare because they often require expensive long-term tag-recapture programs. In marine pelagi...
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ژورنال
عنوان ژورنال: Marine Biology
سال: 2002
ISSN: 0025-3162,1432-1793
DOI: 10.1007/s00227-002-0877-7