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Chaetognath spatial distribution and how egg-carrying affects the vertical distribution of Sagitta tasmanica off southern Chile
Villenas, F.; Palma, S.; Soto, D. (2009). Chaetognath spatial distribution and how egg-carrying affects the vertical distribution of Sagitta tasmanica off southern Chile. Sci. Mar. (Barc.) 73(1): 29-38
In: Scientia Marina (Barcelona). Consejo Superior de Investigaciones Científicas. Institut de Ciènces del Mar: Barcelona. ISSN 0214-8358, more
Peer reviewed article

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Keywords
    Spatial distribution; Vertical distribution; Chaetognatha [WoRMS]; ISE, Chile [Marine Regions]; Marine

Authors  Top 
  • Villenas, F.
  • Palma, S.
  • Soto, D.

Abstract
    Six chaetognath species were determined, all for the first time, in the inner waters between Reloncaví Fjord and Boca del Guafo, Chile. Sagitta tasmanica (85.3%) and Eukrohnia hamata (5.8%) were dominant. Sagitta minima was collected for the first time in the southern channel and fjord region. The largest chaetognath aggregations were found around the Desertores Islands, which create a geographic barrier between two microbasins (north and south) with different oceanographic characteristics. S. decipiens was distributed mostly in the surface layer (0-50 m), whereas E. hamata, S. chilensis, S. minima, and S. enflata were found in deeper waters (50-200 m). The vertical distribution of S. tasmanica was homogeneous; mature, egg-carrying individuals were found at greater depths than those without eggs.

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