{"refrec":{"BRefID":9227,"RR":"<b>Jerling, H.L.; Wooldridge, T.</b> (1994). Comparative morphology of the feeding appendages of four mesozooplankton species in the Sundays River estuary. <i>S. Afr. J. Zool. 29(4)</i>: 252-257","BEntID":9227,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>S. Afr. J. Zool. 29(4)</i>: 252-257","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":1,"TerrestrialFlag":0,"Authorstring":"Jerling, H.L.; Wooldridge, T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Jerling, H.L.; Wooldridge, T.","Englishabstract":"The morphology of feeding appendages of the coexisting estuarine copepods, <i>Pseudodiaptomus hessei</i> and <i>Acartia longipatella</i>, and mysids, <i>Rhopalophthalmus terranatalis</i> and <i>Mesopodopsis wooldridgei</i>, were examined and compared as an aid in elucidating dietary differences. The robust mandibles of <i>P. Hessei</i> copepodids compared to the more pointed and slender teeth with no molar region, of <i>A. Longipatella</i> suggest that the latter species relies on more fragile food particles. Mandible edge indices indicate, however, omnivorous feeding by both species. No clear dietary differences could be deduced from the dimensions of the second maxillae of these copepods. Mandible edge indices calculated for the mysid species suggest a more herbivorous feeding mode in <i>M. Wooldridgei</i> and a more carnivorous one in <i>R. Terranatalis</i>, supporting previous studies on their diets. No interspecific differences between the mysid size classes were evident from edge indices. Significant increments in setae and setule lengths and spacing with increasing mysid size class were evident, reflecting differences in food particle sizes utilized. 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