Show simple item record

dc.contributor.authorAguilar-Perera, Alfonso
dc.date.accessioned2015-11-21T21:31:53Z
dc.date.available2015-11-21T21:31:53Z
dc.date.issued2004-04
dc.identifier.issn0008-6452
dc.identifier.urihttp://hdl.handle.net/123456789/2684
dc.description.abstractBlack hamlet (Hypoplectrus nigricans) was observed to vary in coloration and morphology in Puerto Rico, Mexico and Belize. H. nigricans from Puerto Rico exhibited a larger, grayish body (pectoral fins transparent), with long and pointed pelvic fins, and lunate caudal fin, while individuals from Mexico and Belize exhibited a smaller, darker body (including pectoral fins), with shorter and no pointed pelvic fins, and a truncated caudal fin. Occurrence of coloration and morphology variations of H. nigricans had not been previously noted, and this is the first record of such in the western Atlantic. Color variants are known for at least four species of poplectrus; however, these variants appear to be sympatric in the same geographic region. In contrast, H. nigricans variants may be allopatric. Smaller, darker variants were not found in Puerto Rico, while larger, grayish variants were not found in Mexico or Belize. Reasons for the occurrence of geographically segregated H. nigricans variants are not fully understood, but a hypothesis that may explain it, still needing further testing, is ongoing speciation.
dc.description.sponsorshipCollege of Arts and Sciences University of Puerto Rico, Mayagüez
dc.language.isoen
dc.publisherCaribbean Journal of Science, Vol. 40, No. 1, 150-154, 2004
dc.subjecthamlets
dc.subjectHypoplectrus
dc.subjectSerranidae
dc.subjectreef fishes
dc.subjectfish coloration
dc.subjectspeciation
dc.titleVariations in Morphology and Coloration in the Black Hamlet, Hypoplectrus nigricans(Teleostei: Serranidae)
dc.typeArticle


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record