NOTE Burton et al.: Spawning aggregations of Lut/anus analts at Riley's Hump 



407 



24*32' 



24'31' 



24-3CT 



24*29' 



-83*08' 



■aarg' 



-83*06; 



-83-05' 



Figure 2 



Multibeam bathymetric image of the top of Riley's Hump showing locations of visual census 

 stations (white circles! and mutton snapper aggregation sightings (stations 2 and 12). 

 Bathymetric image was provided courtesy of D. Naar and B. Donahue, Univ. S. Florida, 

 from Mallinson et al., 2003. 



Table 1 



Observations on mutton snapper (Lutjanus analis) on Riley's Hump and their behavior as noted by the authors. 



Date and station 



Numbers observed 



Behavior 



Moon phase 



28 May-1 June 1999 

 31 July-3 Aug 2000 



Solitary L. analis observed 

 on 3 of 11 dives 



Solitary L. analis observed 

 on 5 of 6 dives 



Slowly swimming, diver avoidance 

 Slowly swimming, diver avoidance 



Swimming in a tightly packed group, 

 1.5 m off bottom 



Swimming in tightly packed group, 

 1.5 m off bottom 



Widely dispersed, diver avoidance 



Widespread aggregation, 



actively swimming, did not avoid divers 



Widespread aggregation, 



actively swimming, did not avoid divers 



Full moon May 30 

 New moon July 30 



3 days before 

 new moon 



1 day after 

 full moon 



1 day after 

 full moon 



2 days after 

 full moon 



