EIFAC experiments on pelagic fish stock assessment by acoustic methods in Lake Tegel.

J. Hartmann;E. Dahm;J. Dawson;P. Doering;S. Jürgensen;T. Lindem;H. Löffler;G. Raemhild;V. Völzke

EIFAC experiments on pelagic fish stock assessment by acoustic methods in Lake Tegel.

Year of publication 1987

Place of publication Rome, Italy ;

Pages 26

Author J. Hartmann;E. Dahm;J. Dawson;P. Doering;S. Jürgensen;T. Lindem;H. Löffler;G. Raemhild;V. Völzke

Product type Book (stand-alone)

ISBN 9251025517

Series title EIFAC Occasional Paper

Series number 0258-6096 - EIFAC/OP17

Edition 1

Full item page

Synopsis (short abstract) The intention of this exercise was to compare assessments of the fish stock in a shallow lake (x = 6 m) using single- and multi-beam hydroacoustic methods as well as mark-recapture. The experiment included sampling with trawl, seine, and gill-nets. The overall fish population of the pelagic (surface layer excluded) was estimated using single-beam and dual-beam echo sounder (5 % level) to 226 000 – 682 000 fish (> 3 cm) and 195 000 – 425 000 fish (> 2 cm), respectively. The mark-recapture expe riment - which was not confined to the pelagic population - suggested a stock of 554 000 – 736 000 fish (> 13, 11, 16 cm) of three species, bream, white bream, and roach (Abramis brama, Blicca björkna, and Rutilus rutilus) which represent about 84 % of the commercial catch

Statutory body / Meeting title European Inland Fisheries and Aquaculture Advisory Commission (EIFAAC)

Cite this content as:

Hartmann, J., et al., 1987 EIFAC experiments onpelagic fish stock assessmentby acoustic methods in LakeTegel. EIFAC Occas.Pap., (17): 26p

Language English

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This paper reviews the origins of the exercise, the equipment (echo-sounder and trawl) used, the treatment of the catches, the estimation of fish density resulting from trawling and acoustic surveys. It provides comparisons between fish length distributions and draws conclusions on the results of the experiments.
Project

Pelagic Fishery Investigations on the Southwest Coast - phase 2, India. Distribution and abundance of marine fish resources off the Southwest Coast of India (Results of acoustic surveys, 1976-78)
Pelagic Fishery Investigation on the South-West Coast, India, IND/75/038
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This is one of a series of reports prepared during the course of the FAO/UNDP project identified on the title page. The conclusions and recommendations given in the report are those considered appropriate at the time of its preparation. They may be modified in the light of further knowledge gained at subsequent stages of the project.

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