caa a22 4500 397550448 CHVBK 20180308164748.0 cr unu---uuuuu 161202e199608 xx s 000 0 eng 10.1006/jmsc.1996.0091 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0091 The impacts of increased codend mesh size on the northern Baltic herring fishery: ecosystem and market uncertainties [Elektronische Daten] [S. Kuikka, P. Suuronen, R. Parmanne] The short and long term effects of an increase in trawl codend mesh size (from 20-mm to 36-mm) on catch weight and value per recruit and on the stock biomass of herring in the northern Baltic were assessed. Calculations were carried out using an age-structured model. Yearly estimates of growth rates for commercial catch sample data for 1974-1992 were used in the analysis. Natural mortality estimates were from the multispecies population analysis. Under the conditions prevailing in 1974-1992, the increase in codend mesh size would have led to a reduction in catch and in the value of the catch per recruit. The magnitude of the estimated reduction in catch varied greatly with the growth and natural mortality of the population. If an increase in mesh size is to be profitable for this fishery in the long run, the price of large herring processed for human consumption would have to be six times greater than the price of the smaller fodder herring (the price differential has been around four-fold), or the survival of codend escapees would need to be increased to 80% from the current estimated level of about 15% (e.g. with the aid of new fishing technology). © 1996 International council for the Exploration of the Sea Articles nationallicence management nationallicence uncertainty nationallicence 20-mm mesh nationallicence 36-mm mesh nationallicence Kuikka S. Finnish Game and Fisheries Research Institute, P.O. Box 202, FIN-00151, Helsinki, Finland aut Suuronen P. Finnish Game and Fisheries Research Institute, P.O. Box 202, FIN-00151, Helsinki, Finland aut Parmanne R. Finnish Game and Fisheries Research Institute, P.O. Box 202, FIN-00151, Helsinki, Finland aut ICES Journal of Marine Science Oxford University Press 53/4(1996-08), 723-730 1054-3139 53:4<723 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0091 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0091 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kuikka S. Finnish Game and Fisheries Research Institute, P.O. Box 202, FIN-00151, Helsinki, Finland aut NATIONALLICENCE 700 1- Suuronen P. Finnish Game and Fisheries Research Institute, P.O. Box 202, FIN-00151, Helsinki, Finland aut NATIONALLICENCE 700 1- Parmanne R. Finnish Game and Fisheries Research Institute, P.O. Box 202, FIN-00151, Helsinki, Finland aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/4(1996-08), 723-730 1054-3139 53:4<723 1996 53 icesjms Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford