Search

Your search keyword '"Elvegård, Tor"' showing total 19 results
Start Over Author "Elvegård, Tor"
19 results on '"Elvegård, Tor"'

12. Comparison of diet composition, feeding, growth and health of lumpfish ( Cyclopterus lumpus L.) fed either feed blocks or pelleted commercial feed

Author

Imsland, Albert Kjartan Dagbjartarson, primary, Reynolds, Patrick, additional, Jonassen, Thor Magne, additional, Hangstad, Thor Arne, additional, Adron, John, additional, Elvegård, Tor Anders, additional, Urskog, Tonje Cecilie, additional, Hanssen, Anna, additional, and Mikalsen, Bjørn, additional

Published
2019
Full Text
View/download PDF

18. Feeding behaviour and growth of lumpfish (<italic>Cyclopterus lumpus</italic> L.) fed with feed blocks.

Author

Jónsdóttir, Ólöf D. B., Imsland, Albert K., Reynolds, Patrick, Hangstad, Thor A., Noble, Tom, Wilson, Mark, Mackie, James A., Elvegård, Tor A., Urskog, Tonje C., and Mikalsen, Bjørn

Subjects
LUMPFISH, ANIMAL feeding behavior
Abstract

Abstract: The aim of this project was to investigate if lumpfish can be fed using specially designed feed blocks instead of regular fish feed pellets. Two studies were performed. In Part I different designs of feed blocks were introduced and fish observed with underwater cameras to record feeding behaviour. Results indicate that lumpfish require feed blocks with grooves in order to graze from them and that the acclimation period is relatively short (2–4 hr) before the fish will use them as a feed source. In the second part of the project two duplicate groups of lumpfish with an initial mean (±SD) weight of 125.4 ± 45.7 g were individually weighed and randomly distributed into six 3.5 m3 circular flow‐through tanks with 45 fish in each tank. Fish in three tanks were fed using feed blocks with grooves and fish in three tanks were fed using a regular commercially available lumpfish extruded feed. Both groups received a daily feeding rate of 2% body/weight. From day 14 onwards, fish fed with marine pelleted feed had a significantly higher mean weight compared to fish fed with feed blocks. Although not significant, the condition factor was higher in the feed block group during the study period. Results from this study show that lumpfish will readily graze from feed blocks if they are presented in a way that allows them to do. In addition, the acclimation period required before the fish will utilize them appears to be short thus potentially allowing for their use in commercial salmon cages. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results