Male Fin Research Articles

SEX RATIO IN GAMBUSIA

Previous article No AccessJournal ArticlesSEX RATIO IN GAMBUSIASAMUEL F. HILDEBRANDSAMUEL F. HILDEBRAND Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by The Biological Bulletin Volume 53, Number 5November 1927 Published in association with the Marine Biological Laboratory Article DOIhttps://doi.org/10.2307/1537062 Views: 18Total views on this site Citations: 1Citations are reported from Crossref © 1927 Marine Biological LaboratoryPDF download Crossref reports the following articles citing this article: F. A. E. Crew The Sex Ratio, The American Naturalist 71, no.737737 (Oct 2015): 529–559.https://doi.org/10.1086/280741

Occasional Papers of the Museum of Zoology, University of Michigan

-Webb, S. A., and R. R. Millel: Zoogoneticus tequila, a new goodeid Jish (Cyprinodontiformes) from the Ameca drainage of Mexico, and a rediagnosis of the genus. Occ. Pap. Mus. Zool. Univ. Michigan 725:l-23, 5figs. Zoogoneticus tequila n.sp. is described from the Rio Teuchitlfin, an upper tributary to the Ameca drainage, .Jalisco, Mexico. The new species can be distinguished from its congener, Z. quitzoensis, by adult males having a broad, red-orange band of pigment subterminally in the caudal fin, with melanization in the caudal fin restricted to a proximal, paddle-shaped region. The dorsal and anal fins of adult males possess narrow terminal bands of light yellow color. The laterocaudal pigment bars in both sexes are much less intense and fade at a younger age. The genus Zoogoneticus is diagnosed by the presence of a membrane attaching the sixth pelvic ray to the ventral midline of the body, pigment patches on the posteroventral part of the body, two basicaudal spots that may coalesce, dorsal and anal fins of adult males with narrow terminal bands of red-orange or yellow pigment, with melanization basally, and trophotaeniae with 9 to 14 termini.