Ability to home in small site-attached coral reef fishes

作者：Booth D J^*

来源：Journal of Fish Biology, 2016, 89(2): 1501-1506.

DOI：10.1111/jfb.13043

• body size
• coral-reef fish movement
• Dascyllus aruanus
• habitat complexity
• homing
• Pomacentrus moluccensis

The ability of two common, site-attached coral-reef fishes to return to their home corals after displacement was investigated in a series of field experiments at One Tree Island, southern Great Barrier Reef. The humbug Dascyllus aruanus was displaced up to 250 m, with 42% of individuals returning home, irrespective of body size, displacement, direction ( up or across currents) and route complexity, while for the lemon damselfish Pomacentrus moluccensis 35% of individuals returned overall, with 33% from the greatest displacement, 100m along a reef edge. Given that the home range of both species is < 1 m(2), over their 10+ year life span, the mechanisms and motivations for such homing ability are unclear but it may allow resilience if fishes are displaced by storm events, allowing rapid return to home corals.

• 出版日期2016-8