Figure 5
From: Interactions of marine mammals and birds with offshore membrane enclosures for growing algae (OMEGA)
Trained pinnipeds executing operant commands to interact with PBRs tethered in a tank. Hauling out onto the PBR by the harbor seal (Phoca vitulina richardii) (a) and the young sea lion (Zalophus californianus) (b), put stress on the PBR welds. Biting and dragging the PBR by a second older sea lion (c) and jumping over or onto a floating PBR (d) test the durability of its materials and construction.