| high-speed weight estimation of whole herring (clupea harengus) using 3d machine vision. | weight is an important parameter by which the price of whole herring (clupea harengus) is determined. current mechanical weight graders are capable of a high throughput but have a relatively low accuracy. for this reason, there is a need for a more accurate high-speed weight estimation of whole herring. a 3-dimensional (3d) machine vision system was developed for high-speed weight estimation of whole herring. the system uses a 3d laser triangulation system above a conveyor belt moving at a speed ... | 2011 | 22417497 |
| feeding ecology of northeast atlantic mackerel, norwegian spring-spawning herring and blue whiting in the norwegian sea. | the norwegian spring-spawning (nss) herring (clupea harengus), blue whiting (micromesistius poutassou) and northeast atlantic (nea) mackerel (scomber scombrus) are extremely abundant pelagic planktivores that feed in the norwegian sea (ns) during spring and summer. this study investigated the feeding ecology and diet composition of these commercially important fish stocks on the basis of biological data, including an extensive set of stomach samples in combination with hydrographical data, zoopl ... | 2016 | 26895485 |
| latitudinal gradient in otolith shape among local populations of atlantic herring (clupea harengus l.) in norway. | otolith shape analysis of atlantic herring (clupea harengus) in norwegian waters shows significant differentiation among fjords and a latitudinal gradient along the coast where neighbouring populations are more similar to each other than to those sampled at larger distances. the otolith shape was obtained using quantitative shape analysis, the outlines were transformed with wavelet and analysed with multivariate methods. the observed morphological differences are likely to reflect environmental ... | 2015 | 26101885 |