Journal
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
Volume 283, Issue 1832, Pages -Publisher
ROYAL SOC
DOI: 10.1098/rspb.2015.3019
Keywords
biologging; behavioural synchrony; size assorted; three dimensional; reality mining
Categories
Funding
- cooperative research organization for the Promotion Program of International Fisheries stock assessment from the Fisheries Agency of Japan
- JSPS KAKENHI grant [25712022, 16J05814]
- Biologging Solutions Inc.
- Grants-in-Aid for Scientific Research [25712022, 25871062, 16J05814, 16H06158] Funding Source: KAKEN
Ask authors/readers for more resources
There is a potential trade-off between grouping and the optimizing of the energetic efficiency of individual locomotion. Although intermittent locomotion, e.g. glide and upward swimming (GAU), can reduce the cost of locomotion at the individual level, the link between the optimization of individual intermittent locomotion and the behavioural synchronization in a group, especially among members with different sizes, is unknown. Here, we continuously monitored the schooling behaviour of a negatively buoyant fish, Pacific bluefin tuna (N = 10; 21.0 similar to 24.5 cm), for 24 h in an open-sea net cage using accelerometry. All the fish repeated GAU during the recording periods. Although the GAU synchrony was maintained at high levels (overall mean = 0.62 for the cross-correlation coefficient of the GAU timings), larger fish glided for a longer duration per glide and more frequently than smaller fish. Similar-sized pairs showed significantly higher GAU synchrony than differently sized pairs. Our accelerometry results and the simulation based on hydrodynamic theory indicated that the advantage of intermittent locomotion in energy savings may not be fully optimized for smaller animals in a group when faced with the maintenance of group cohesion, suggesting that size assortative shoaling would be advantageous.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available