3-7 September 2018
Audimax | Kiel University
Europe/Berlin timezone

Size structure, community composition and biomass size spectra of mesopelagic fishes in the tropical Atlantic Ocean and the West-Saharan OMZ in 2015

3 Sep 2018, 17:00
Audimax-Hörsaal-C (Kiel University)


Kiel University

Oral 02 Ecosystem Impacts 02 Ecosystem Impacts


Heino Fock (Thuenen Inst of Sea Fisheries)


In 2015, 5 stations each were sampled in the tropical Atlantic and the West-Sahara OMZ for mesopelagic fauna. Community analysis revealed a close relationship between OMZ and tropical region, although some species increased in abundance in the OMZ (e.g. Nannobrachium isaacsi, Myctophidae; Malacosteus niger, Malacosteidae). Length composition and size ranges revealed a smaller maximum size for OMZ specimens (except for Myctophum affine, Myctophidae) and a significant difference in size structure for 11 out 14 tested species. A tenfold higher abundance of specimens in the size range 30-60 mm standard length appeared in the OMZ. It is concluded that observed differences in length structure are due to environmental changes and local productivity.

Affiliation Thuenen Inst of Sea Fisheries
Are you a SFB 754 / Future Ocean member? No
Position Senior Scientist
Email Address heino.fock@thuenen.de

Primary authors

Heino Fock (Thuenen Inst of Sea Fisheries) Stephanie Czudaj (Thuenen Insts of Sea Fisheries)

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