Fig. 12.23 School of Lutjanus bohar in the area of a spawning aggregation at the south end of
Peleliu Island, Palau (Photo: © Nial McCarthy)
Fig. 12.22 (a ) Gonado somatic Index (GSI) for Lutjanus fulvus according to days after the full
moon, January–March 2007. Only fi sh collected during the morning were used for this graph to
avoid ovaries that are large due to hydration. Fish collected at 11.5 days were taken at the aggregation site, but fi sh were not aggregated. ( b ) Ovaries of L. fulvus collected 1 day after the full moon
from the spawning aggregation show a large increase in GSI between the morning (11 a.m.) and
afternoon (5 p.m.) due to hydration of eggs prior to spawning
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