NC 28557-3209;
Morehead City;
University of North Carolina;
Institute of Marine Sciences;
关键词：
stingrays;
western atlantic ocean;
South America;
myliobatiformes;
serrations;
tail spines;
potamotrygonidae;
fresh waters;
期刊名称：
Journal of the North Carolina Academy of Science
i s s n：
0013-6220
年卷期：
2009 年
125 卷
2 期
页 码：
39-46
页 码：
摘 要：
Tail spine characteristics of 37 Stingray species (474 males, 517 females) frequenting the Western Atlantic Ocean and freshwater rivers of South America were examined noting spine serrations, presence of a dorsal groove, and other features. Spine serrations varied between 32 (Urotrygon jamaciensis) to 217 (Pteroplatytrygon violacea that characteristically possessed cul-de-sacs prominent modially between spine serrations). Seventeen species of freshwater river stingrays (Potamotrygonids) dominated South American fresh waters with total serrations varying from 20 (Potamotrygon dumerillii) to 118 (P.scobina). P. leopoldi and P. ocellata were not available for study. Dasyatis (8 species) were the second most frequently encountered stingrays. Their spine total serrations varied from 57 {Dasyatis geijskesi) to 179 (D. centroura.) Two Myliobatid stingray spine serration totals varied 61-92. A Myliobatis goodei look alike was found to be distinct from M. goodei. Tail spine serration variations were statistically different between genera and serrations/species. No primitive to advanced species spine associations existed although type of species behavior (pelagic to benthic) and habitat use existed as higher spine serration counts were usually associated with pelagic species, low with benthic or freshwater inhabiting species. Utilizing a combination of tail spine characteristics, one can usually define a species and if it was the culprit causing death or harm.
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