286
allows small juvenile fi sh to escape from the
fence (Kamimura 2011 ). Because the length of
the fi sh fences was longer than that of the coastline in front of the fences (Fig. 4 ), fi sh fences
had a big infl uence on marine environments
around Ishigaki Island. This same type of trap
has also been constructed of bamboo or wood,
which also provides a habitat for attached
organisms and can enhance the productivity of
lower trophic levels in coastal waters.
Fig. 4 Map showing the historical spatial distribution of fi sh fences in Shiraho, Ishigaki Island
T. Komatsu and T. Yanagi
allows small juvenile fi sh to escape from the
fence (Kamimura 2011 ). Because the length of
the fi sh fences was longer than that of the coastline in front of the fences (Fig. 4 ), fi sh fences
had a big infl uence on marine environments
around Ishigaki Island. This same type of trap
has also been constructed of bamboo or wood,
which also provides a habitat for attached
organisms and can enhance the productivity of
lower trophic levels in coastal waters.
Fig. 4 Map showing the historical spatial distribution of fi sh fences in Shiraho, Ishigaki Island
T. Komatsu and T. Yanagi