505
12 Species Case Studies
stupor” ( sensu Johannes 1981 ) indicates how confused the interpretation of this
supposed phenomenon has become (see Chap. 5 ).
During morning hours bullethead parrotfi sh eggs, spawned mostly in the hour
after high tide, dominated the zooplankton being exported from coral reef in Palau
(Hamner et al. 2007 ) and during afternoon high tides there was little or no spawning
by scarids and the fi sh eggs streaming off the reef were dominated by those of surgeonfi shes. Sancho et al. ( 2000a ) reported afternoon spawning (peak abundance and
activity 1,300–1,700 h) to be most common in bullethead parrotfi sh, although it was
not observed spawning at dusk.
Fig. 12.48 Striped parrotfi sh, Scarus iserti , spawning activity, showing group-spawning of clusters
of fi sh within larger aggregations. Discovery Bay, Jamaica (Photo: Patrick L. Colin)
12 Species Case Studies
stupor” ( sensu Johannes 1981 ) indicates how confused the interpretation of this
supposed phenomenon has become (see Chap. 5 ).
During morning hours bullethead parrotfi sh eggs, spawned mostly in the hour
after high tide, dominated the zooplankton being exported from coral reef in Palau
(Hamner et al. 2007 ) and during afternoon high tides there was little or no spawning
by scarids and the fi sh eggs streaming off the reef were dominated by those of surgeonfi shes. Sancho et al. ( 2000a ) reported afternoon spawning (peak abundance and
activity 1,300–1,700 h) to be most common in bullethead parrotfi sh, although it was
not observed spawning at dusk.
Fig. 12.48 Striped parrotfi sh, Scarus iserti , spawning activity, showing group-spawning of clusters
of fi sh within larger aggregations. Discovery Bay, Jamaica (Photo: Patrick L. Colin)