Life Cycle Assessment of Icelandic Arctic Char Fed Three Different Feed Types

This study utilized Life Cycle Assessment (LCA) to quantify the environmental impacts of 1 kg of live-weight Arctic char, cultivated in an Icelandic land-based aquaculture farm. The functional unit included assessments of three different feed types; standard feed with high inclusion levels of marine ingredients (Conv.), experimental feed with high inclusion levels of agricultural ingredients (ECO) and a hypothetical Black soldier fly larvae based feed (BSF). Results of the study indicated that the feed production causes the greatest environmental impacts from all feed types considered. The Black soldier fly based feed demonstrated the best environmental performance of the three feed types. Furthermore, it can be concluded that by increasing agriculture based ingredients at the cost of marine based ingredients, a better environmental performance can be reached. This study demonstrated the importance of feed production for aquaculture in terms of environmental impacts and showed that byoptimizing feed consumption, reducing the amount of fishmeal and fish oil and even creating new types of feed from novel ingredients, the overall impacts of aquaculture can be greatly reduced.The study was conducted as a part of MSc studies in Environmental and Natural Resources at the University of Iceland, in collaboration with Matis ltd., Icelandic food and biotech R&D, which also funded the project. The authors are grateful for the financial and expert support provided by both entities. The authors would also like to thank the owner of the aquaculture company involved in the study, for clear and concise data provision, and also other companies that provided data for this study.Peer Reviewe

Profitable Arctic charr farming in the Nordic countries

The present study evaluated these earlier findings under practical conditions in commercial aquaculture production, to verify the results of the laboratory trials.Reduced protein content was combined with high fishmeal substitution in diets and the diets tested as compared to the commercial diets used by partners in the three Nordiccountries involved. The evaluation was carried out at four Arctic charr farms, two in Iceland and one in Norway, in addition a fourth trial, with triplicate groups carried out inSweden. An additional trial was set up in Iceland to study the effects of different amount of protein and plant protein on the environment and fish welfare. The quality of thefish produced was evaluated in all trials, either through sensory evaluation tests or by ordinary consumer tests. In summary, the trials shoved somewhat variable effects of the novel diets on fish growth as compared to the control diet, with a somewhat reduced growth of fish observed in theIcelandic tests, while improved growth was obtained in the test carried out in Norway and equal growth in the Swedish trial. In addition, the Icelandic tests showed a tendencytowards poorer feed utilisation of the test diets as compared to the control diet, while the opposite results were obtained in Norway and an equal feed utilisation between thegroups was observed in the Swedish trial. No significant differences in quality of the fish produced were observed related to the different diets tested

Slanting red clouds turning to gold at Lake Pedder, Tasmania, ca. 1968 [picture] /

Title devised by cataloguer based on information supplied by the vendor.; In: Olegas Truchanas Lake Pedder audiovisual collection.; This is a digital image made by the National Library of Australia from an original in private ownership.; AV Reference number: 029.; Reproduced from: 1 slide : col. ; 3.5 x 2.4 cm.; Mode of access: Internet via World Wide Web at: http://nla.gov.au/nla.pic-vn3885846-s29; Copied by permission of Mrs. Melva Truchanas, 2006