FIELD EVIDENCE FOR SUSPENSION-FEEDING IN PSEUDOCARANX DENTEX, WITH COMMENTS ON RAM FILTERING IN OTHER JACKS (CARANGIDAE)

Suspension feeding is known in 16 fish families, with one instance of ram filtering recently recorded in a piscivorous naucratine carangid. I present field evidence of suspension feeding by Pseudocaranx dentex, a piscivorous and macroinvertivorous carangine jack, and note that ra m filtering is already recorded for the leatherjacket Oligoplites sali ens, a piscivorous and scale-eating scomberoidine carangid. Based on f ood habits and postulated phylogenetic relationships, I suggest that a dditional species of carangine jacks ram filter and that suspension fe eding is a derived condition within the Carangidae.