Portugal (IMAGE) Frontiers Caption The darker the shading, the greater the proportion of individuals caught commercially that are smaller than the EU-defined Minimum Conservation Reference Size. Individuals smaller than the MCRS must be landed by law, but may not be sold. The aim is to discourage catching individuals smaller than the MCRS, as these take up space on board and create extra work, yet yield no gain. It is hoped that to avoid this waste, fishers are encouraged to use more selective gear, and to fish in areas with a low probability of catching young (small) individuals. A: European hake; B: Blue whiting; C: Atlantic horse mackerel; D: Across species. Depth contours shown are 100 and 200 m. Credit G. Milisenda and coathors Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.