Ecology and phylogeny of appendicularians in the South Adriatic

Garić, Rade (2013) Ecology and phylogeny of appendicularians in the South Adriatic. Doctoral thesis, Faculty of Science > Department of Biology.

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Abstract

During the year 2009 a research of appendicularians in the South Adriatic was conducted, in coastal waters and open sea at 5 stations in layers from the surface to 1200 m depth. Maximal abundance of appendicularians in coastal area was recorded in August (587 ind. m-3) and maximum at the open sea was recorded in February (236 ind. m-3). In the deepest investigated layer from 800 to 1200 m depth average yearly abundance was 0.37 ind. m-3. In spite of very low abundance deeps sea layers have constant taxonomical composition. During the research period 9 new species for the Adriatic was recorded and two new species for the science were described. Based on unique morphological characters, six potentially new species were detected. Phylogenetic analysis based on 18S rRNA gene fragment showed that appendicularians are sister group to the order Stolidobranchia, with good bootstrap support. This indicates that appendicularians arose from benthic forms or that benthic tunicates evolved sessility independently. Phylogenetic analysis doesn’t support genera Tectillaria, Appendicularia, Stegosoma, Folia and Megalocercus so the cancellation of these genera is suggested. Many cryptic species were detected, especially within species Oikopleura dioica.

Item Type: Thesis (Doctoral thesis)
Keywords: vertical distribution, appendicularian phylogeny, new species
Supervisor: Batistić, Mirna
Date: 2013
Number of Pages: 77
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 29 Sep 2014 09:49
Last Modified: 29 Sep 2014 09:49
URI: http://digre.pmf.unizg.hr/id/eprint/2851

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