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The role of iceberg scours in niche separation within the Antarctic fish genus Trematomus
Brenner, M.; Buck, B.H.; Cordes, S.; Dietrich, L.; Jacob, U.; Mintenbeck, K.; Schröder, A.; Brey, T.; Knust, R.; Arntz, W.E. (2002). The role of iceberg scours in niche separation within the Antarctic fish genus Trematomus, in: Arntz, W.E. et al. (Ed.) Ecological studies in the Antarctic sea ice zone: results of EASIZ Midterm Symposium. pp. 215-220
In: Arntz, W.E.; Clarke, A. (Ed.) (2002). Ecological studies in the Antarctic sea ice zone: Results of EASIZ Midterm Symposium. Springer: Berlin. ISBN 3-540-43218-3. 277 pp., more
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Brenner, M.; Buck, B.H.; Cordes, S.; Dietrich, L.; Jacob, U.; Mintenbeck, K.; Schröder, A.; Brey, T.; Knust, R.; Arntz, W.E. (2001). The role of iceberg scours in niche separation within the Antarctic fish genus Trematomus. Polar Biol. 24(7): 502-507. dx.doi.org/10.1007/s003000100246, more
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Keywords
    Composition > Community composition
    Diets
    Ecological niches
    Erosion > Scouring > Iceberg scouring
    Stomach content
    Trematomus eulepidotus Regan, 1914 [WoRMS]; Trematomus lepidorhinus (Pappenheim, 1911) [WoRMS]; Trematomus nicolai (Boulenger, 1902) [WoRMS]; Trematomus pennellii Regan, 1914 [WoRMS]; Trematomus scotti (Boulenger, 1907) [WoRMS]
    PSW, Weddell Sea [Marine Regions]
    Marine/Coastal
Authors  Top 
  • Brenner, M.
  • Buck, B.H.
  • Cordes, S.
  • Dietrich, L.
  • Jacob, U.
  • Mintenbeck, K.
  • Schröder, A.
  • Brey, T.
  • Knust, R., more
  • Arntz, W.E.
Abstract
    Species of the Antarctic fish genus Trematomus occupy different trophic niches. It is not clear, however, whether small-scale variability in benthic community structure affects niche separation. Therefore abundance and biomass of fish were determined and stomach content and food composition were compared in areas affected by iceberg scours and unaffected areas in the Weddell Sea. Trematomus eulepidotus, T. lepidorhinus and T. scotti dominate undisturbed areas, whereas T. nicolai and especially T. pennellii dominate disturbed areas. Total stomach content and number of prey taxa per fish are higher in preferred than in non-preferred areas. These findings indicate that small-scale horizontal patterns caused by iceberg scours play a distinct role in Trematomus niche separation.
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