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  • 1
    Electronic Resource
    Electronic Resource
    Ontogenic migration of Pleuronectes flesus larvae in the eastern English Channel (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 51 (1997), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Along the French coast of the eastern English Channel there is a strong separation in the hydrology, zooplankton community and ichthyoplankton assemblages, between a coastal ecosystem of continental influence and an offshore ecosystem of Atlantic influence. During April and May 1995, two surveys (60 stations) were conducted to describe the early life history of fishes in this area, and especially the influence of hydrodynamics on Pleuronectes flesus larval transfer from the spawning grounds to the nurseries. Ontogenic changes in larval distributions were described by variograms and path analysis. P. flesus eggs and young larvae were found in the southern offshore area. Their distributions were mainly influenced by sediment and cold temperature found in the central part of the Channel. Older larvae were found at more northern stations, showing a clumped distribution near estuaries, in areas of low salinity. Apparently, young stages of this species were transported from the south central spawning area to coastal waters by residual currents. Behavioural changes in older larvae facilitate the move to nurseries along the French coast.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1997.tb06110.x
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  • 2
    Electronic Resource
    Electronic Resource
    Day and night mesopelagic fish assemblages off the Kerguelen Islands (Southern Ocean) (2000)
    Springer
    Polar biology 23 (2000), S. 106-112 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Mesopelagic fish assemblages were investigated in the Polar Frontal Zone off the Kerguelen Islands during summer 1995, in parallel with a king penguin tracking study. During the day, the upper offshore water layers (0–200 m) have low potential prey diversity and abundance with only three fish species: a lanternfish, Krefftichthys anderssoni, a member of the Muraenolepididae, Muraenolepis marmoratus, and the early stages of the nototheniid, Lepidonotothen squamifrons. The mesopelagic fish community, including the typical myctophids, first appears in the deeper layer (300 m). At night, the surface layer (50 m) is invaded by the mesopelagic Myctophidae Electrona antarctica, Gymnoscopelus braueri, G. piabilis, G. fraseri, G. nicholsi, Protomyctophum bolini and P. tenisoni. Deeper (〉100 m), a cline of species assemblages from the coast to offshore is observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000050015
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  • 3
    Electronic Resource
    Electronic Resource
    Role of bay, fjord and seamount on the early life history of Lepidonotothen squamifrons from the Kerguelen Islands (2000)
    Springer
    Polar biology 23 (2000), S. 459-465 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Among the Kerguelen Islands' demersal fish, larvae of Lepidonotothen squamifrons are dominant during the summer over the island shelf and surrounding seamounts. Distribution of larval stages from different scientific surveys confirmed the position of the two known spawning grounds (south of the Kerguelen shelf and at the Kerguelen-Heard bank) and may indicate other spawnings on the Skiff bank and in bays and fjords. Different larval cohorts were observed for the shelf and the coastal zone whereas a unique one was observed for Skiff and Kerguelen-Heard seamounts. Larvae from the spawning ground south of the Kerguelen shelf appear in early summer and show a northwards dispersal to the northeastern nearshore zone, the Baleiniers Gulf, following the scheme of fish migration shown by Harden-Jones. Later on, larvae from the northern inshore spawning zone occur in the same area, which presumably then avoid intraspecific competition with the previous larvae. Larval distribution and migration strategy seemed to be in accordance with the island mass or seamount effect under a regular current.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003009900106
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  • 4
    Electronic Resource
    Electronic Resource
    Spatio-temporal distribution of mesozooplankton in a sub-Antarctic coastal basin of the Kerguelen Archipelago (southern Indian Ocean) (1996)
    Springer
    Polar biology 16 (1996), S. 581-587 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Seventeen surveys were performed fortnightly from January to December 1990 and covered a grid of 16 stations in the large Morbihan Bay at Kerguelen Island. Temperature and salinity were measured at four or five standard depths. Chlorophyll, carbon and nitrogen contents of surface water particulate matter were determined along with mesozooplanktonic biomass and abundance of copepods. The dominant species (90%) of mesozooplankton wasDrepanopus pectinatus, and two other taxa,Oithona spp. andCalanus simillimus, accounted for 8.6 and 0.4% respectively. A Multiple Correspondence Analysis was used to determine the influence of abiotic (temperature and salinity) and biotic factors (potential food supply) on the spatio-temporal distribution of copepods and, more specifically, on that of the growth stages ofD. pectinatus. No specific hydrological features were found. The distribution of copepods was fairly homogeneous in the whole bay while the quantitative changes were influenced by the seasonal rhythm. Only a slight trend of increasing values for the biotic or abiotic parameters and the neriticD. pectinatus was observed from the central to the inner back area of the bay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02329055
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of the frontal zones on ichthyoplankton and mesopelagic fish assemblages in the Crozet Basin (Indian sector of the Southern Ocean) (1993)
    Springer
    Polar biology 13 (1993), S. 557-564 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract One of the aims of oceanographic campaign MD 68/SUZIL, carried out in austral autumn 1991 in the Indian sector of the Southern Ocean and its adjacent subtropical waters, was to investigate the influence of hydrography on the ichthyoplankton and mesopelagic fish assemblages in the Crozet Basin. It appears that, in contrast to other sectors of the Southern Ocean, the main biogeographical barriers are the Subantarctic Front and the Agulhas Front which appear to be “vertical convergence fronts”. The importance of the Antarctic Polar Front and the Subtropical Front as barriers to fish seems to be minimized in this area because of its particular hydrological features, such as the lack of a subantarctic zone, the maximum current intensity of the Subantarctic Front between these fronts, and their structures — they are horizontal convergence fronts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00236398
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  • 6
    Electronic Resource
    Electronic Resource
    Spatio-temporal distribution of mesozooplankton in a sub-Antarctic coastal basin of the Kerguelen Archipelago (southern Indian Ocean) (1996)
    Springer
    Polar biology 16 (1996), S. 581-587 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Seventeen surveys were performed fortnightly from January to December 1990 and covered a grid of 16 stations in the large Morbihan Bay at Kerguelen Island. Temperature and salinity were measured at four or five standard depths. Chlorophyll, carbon and nitrogen contents of surface water particulate matter were determined along with mesozooplanktonic biomass and abundance of copepods. The dominant species (90%) of mesozooplankton was Drepanopus pectinatus, and two other taxa, Oithona spp. and Calanus simillimus, accounted for 8.6 and 0.4% respectively. A Multiple Correspondence Analysis was used to determine the influence of abiotic (temperature and salinity) and biotic factors (potential food supply) on the spatio-temporal distribution of copepods and, more specifically, on that of the growth stages of D. pectinatus. No specific hydrological features were found. The distribution of copepods was fairly homogeneous in the whole bay while the quantitative changes were influenced by the seasonal rhythm. Only a slight trend of increasing values for the biotic or abiotic parameters and the neritic D. pectinatus was observed from the central to the inner back area of the bay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000050092
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  • 7
    Electronic Resource
    Electronic Resource
    Description of planktonic polychaete larvae from Terre Adélie and the Ross Sea (Antarctica) (1999)
    Springer
    Polar biology 22 (1999), S. 329-340 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An analysis was carried out on 51 samples from 32 stations, obtained during the I.C.O.T.A. cruise between 18 January 1996 and 7 February 1996 in the Pointe Géologie Archipelago, Terre Adélie, and on samples obtained by 2 sediment traps deployed in the Ross Sea, within the framework of the Italian C.L.I.M.A. Project. These samples showed the unexpected presence of numerous larvae of benthic marine invertebrates. In addition, larvae from the Ross Sea were examined. Seven phyla with complex life-cycles and at least 18 species of benthic polychaetes were represented. Morphological descriptions by scanning electron microscopy of the most frequent larvae and identification of larval types are provided. Descriptions from the literature of larvae collected in the Antarctic Peninsula were used for comparison. Morphological descriptions do not always lead to identification at the species level; however, these descriptions are indispensable for establishing the geographic distribution of larvae. It has been demonstrated that indirect identification methods relying on the premise that the benthic fauna is entirely known and that sampled larvae belong only to species already known through their benthic adult stage may lead to obvious absurdities. As an ecological consequence, Thorson's rule, according to which indirect development should not be represented and direct development should be dominant at high latitudes, is not supported by our data. A short comparison of the local reproductive pattern with a subantarctic area, the Kerguelen Archipelago, strongly suggests that the absence of planktonic development in this area cannot be explained by Thorson's rule. This rule has been invalidated in more austral zones; the prevalent reproductive pattern in the Kerguelen Archipelago is linked to the very marked advective strength of water flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000050426
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  • 8
    Electronic Resource
    Electronic Resource
    Gentoo penguin Pygoscelis papua diet as an indicator of planktonic availability in the Kerguelen Islands (1994)
    Springer
    Polar biology 14 (1994), S. 147-153 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Since penguins rely on the main planktonic resources of the Southern Ocean, knowledge of their diet may be used for monitoring these resources During winter and spring of 1987 and 1989, we investigated the composition of the diet of gentoo penguins. Pygoscelis papua, in relation to changes in the availability of two prey species, Euphausia vallentini and Themisto gaudichaudii, sampled during plankton surveys in the Kerguelen Islands. The comparison between plankton surveys and diet analysis was performed on samples taken 2–4 km from the studied colonies. Data on the abundance of Zooplankton derived from penguins' diet matched closely those from net hauls during a year of high plankton availability (1987). On the other hand, a weaker correspondence was found during a year of restricted availability (1989). The mean sizes of amphipods caught by penguins and net hauls were very similar but the size distribution showed comparatively fewer small and large individuals in net-hauls than in penguin stomachs. Detailed studies on the feeding range and foraging effort of penguins are therefore needed in the near future to validate the potential of penguin diet as a measure of plankton abundance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00240519
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  • 9
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    Climate change and Southern Ocean ecosystems I: how changes in physical habitats directly affect marine biota (2014)
    John Wiley & Sons Ltd
    In:  EPIC3Global Change Biology, John Wiley & Sons Ltd, ISSN: 1365-2486
    Details
    Publication Date: 2014-07-14
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 10
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    7. Biogeographic patterns of fish (2014)
    Scientific Committee on Antarctic Research
    In:  EPIC3Biogeographic Atlas of the Southern Ocean, Cambridge, Scientific Committee on Antarctic Research, pp. 327-362, ISBN: 978-0-948277-28-3
    Details
    Publication Date: 2014-09-22
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , peerRev
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