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  • Cambridge University Press (CUP)  (2)
  • English  (2)
  • Biodiversity Research  (2)
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  • Cambridge University Press (CUP)  (2)
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  • English  (2)
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  • Biodiversity Research  (2)
  • 1
    Online Resource
    Online Resource
    Effect of a carnivorous diet on the lipids, fatty acids and condition of Antarctic krill, Euphausia superba
    Cambridge University Press (CUP) ; 2007
    In:  Antarctic Science Vol. 19, No. 2 ( 2007-06), p. 183-188
    Details
    In: Antarctic Science, Cambridge University Press (CUP), Vol. 19, No. 2 ( 2007-06), p. 183-188
    Abstract: Krill are thought to be predominantly herbivorous, but a heterotrophic diet might be crucial for their growth and survival. To compare the influence of herbivory and carnivory on krill we conducted a nine month feeding trial. We examined lipid composition of the hepatopancreas, abdomen and remaining body portions of krill fed diatoms at bloom condition levels, and diatoms with the addition of pellets or minced clam meat to simulate a partly carnivorous diet. Mortality, dry mass and lipid content were similar among treatments. We examined lipid class and fatty acid profiles, with emphasis placed on the ratio of storage (triacylglycerol) to structural (polar lipid) lipid and key essential omega 3 polyunsaturated fatty acids: 20:5ω3 and 22:6ω3. The triacylglycerol : polar lipid ratio increased in krill fed on the mixed diet as did the 20:5ω3 : 22:6ω3 ratio. Overall these findings indicate that provision of clam in the diet improved krill condition, and further suggest that carnivory may aid krill growth in the wild under certain environmental conditions.
    Type of Medium: Online Resource
    ISSN: 0954-1020 , 1365-2079
    URL: Article
    DOI: 10.1017/S0954102007000259
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2007
    detail.hit.zdb_id: 2104104-0
    detail.hit.zdb_id: 1009128-2
    SSG: 12
    SSG: 13
    SSG: 14
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Distribution and lipid composition of early life stages of the cranchiid squid Galiteuthis glacialis (Chun) in the Weddell Sea, Antarctica
    Cambridge University Press (CUP) ; 1994
    In:  Antarctic Science Vol. 6, No. 2 ( 1994-06), p. 235-239
    Details
    In: Antarctic Science, Cambridge University Press (CUP), Vol. 6, No. 2 ( 1994-06), p. 235-239
    Abstract: The relatively small numbers of pelagic cephalopods caught in the RMT-8 samples (0–300 m) in February/March 1983 in the Weddell Sea were dominated by early life stages of the cranchiid squid Galiteuthis glacialis. A total of 48 specimens were caught with dorsal mantle length (ML) ranging from 4–36 mm. They occurred with a mean density of 0.15 ind. × 1000 m −3 and were present in 38% of 33 RMT-8 samples. G. glacialis was the only cranchiid squid found in the Weddell Sea between 66° and 74°S. Its early life stages were concentrated in the layers below the summer thermocline ( 〉 50 m) and body sizes appeared to increase towards deeper water layers. For biochemical analyses, nine specimens of G. glacialis (ML 6–18 mm) were sampled in the eastern Weddell Sea between 185–520 m water depth in January/February 1985. Total lipid contents ranged from 8%–11% dry weight (DW) with phospholipids being the main lipid component (43–56% of total lipid). Storage lipids (triacylglycerols) made up 18–26% of total lipid. The relatively low lipid contents may reflect the early development stage of the specimens examined. The data presented give the first information on geographical and vertical distribution patterns of early life stages of G. glacialis in the high-Antarctic Weddell Sea, as well as on their lipid content and composition.
    Type of Medium: Online Resource
    ISSN: 0954-1020 , 1365-2079
    URL: Article
    DOI: 10.1017/S0954102094000362
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1994
    detail.hit.zdb_id: 2104104-0
    detail.hit.zdb_id: 1009128-2
    SSG: 12
    SSG: 13
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
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