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  • Springer  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Population structure and migration of the stone crab Lithodes murrayi in the Crozet Islands, Subantarctic Indian Ocean (1985)
    Springer
    Marine biology 89 (1985), S. 263-269 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The composition of a population of Lithodes murrayi Henderson, 1888, and its estival movements in the Crozet Archipelago have been studied from catches made on three summer cruises (1974, 1976, 1982). The vertical distribution of the species in relation to sex and size-classes has been analyzed and the evolution of these parameters during the late austral summer and early autumn followed. Size at first maturity has been estimated. A pattern of the migration of the species is deduced, whereby males precede females and juveniles in the summer displacement to shallower bottoms. Fishing results using traps and beam trawl are compared, and the limitation of the former gear for studying population dynamics is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393660
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    210Pb as a dietary indicator in the Antarctic pelagic community (1993)
    Springer
    Marine biology 115 (1993), S. 161-171 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The naturally occurring radionuclide 210Po is useful as a tracer of diets of marine organisms. Data for 210Pb, the grandparent of 210Po, are less abundant: we therefore report here 210Pb concentrations in a substantial collection of marine biota obtained from the Antarctic Ocean during the SIBEX II cruise in 1985. The general levels of 210Pb are within the range of previously published data but, as in the case of 210Po, there are differences which can be associated with variations in the diet of the organism. The levels of 210Pb in the krill Euphausia superba show seasonal changes which can be interpreted in terms of changing diet. In a simple classification of the pelagic food chain, the levels of 210Pb tend to increase from omnivores to filter-feeders to predators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00349398
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
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