Critical swimming speed in groups of Atlantic salmon Salmo salar

Aquaculture Environment Interactions

Frida Solstorm¹  Mette Remen¹  Samantha Bui¹  Pascal Klebert¹  Tone Vågseth¹  Malthe Hvas¹  David Solstorm¹  Frode Oppedal¹ 

关键词: Exposed aquaculture;    Swim tunnel;    Ucrit;    Atlantic salmon;    Flume length;    School;   

DOI  :  10.3354/aei00207

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: Critical swimming speed (U_crit) has traditionally been measured in relatively small swimming tunnels with 1 fish alone. However, both increased flume lengths and swimming in groups are known to improve performance. Atlantic salmon Salmo salar farming is currently expanding to more exposed locations, which necessitates guidelines for limits in water current peak velocity to secure animal welfare. A large swim tunnel system was therefore developed which allowed for swimming trials at relevant stocking densities of Atlantic salmon comparable to the conditions in exposed sea cages. U_crit was measured in groups of 3 size classes (small post-smolts, large post-smolts, adults) in this new swim tunnel and compared to measurements from individual fish in a smaller swim tunnel. U_crit (in cm s^�?1) increased with size and was significantly lower in the smaller setup. Our results suggest that U_crit can be used as a maximum current velocity tolerance threshold in exposed aquaculture, where longer periods above this value would be detrimental to the welfare and physiological function of the fish. This study represents a starting point in obtaining suitable current velocity profiles for farmed Atlantic salmon during the on-growing phase in sea cages.

【 授权许可】

Unknown