Title

Reproductive Life History Of The Atlantic Stingray, Dasyatis Sabina (Pisces, Dasyatidae), In The Freshwater St Johns River, Florida

Authors

Authors

M. R. Johnson;F. F. Snelson

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Bull. Mar. Sci.

Keywords

Marine & Freshwater Biology; Oceanography

Abstract

A population of the Atlantic stingray, Dasyatis sabina, resides in the freshwater St. Johns River system, Florida. The reproductive life history of the species in Lake Monroe near Sanford, Florida, was studied from November 1990 to January 1992. No major differences in reproductive timing or performance were noted between this freshwater population and marine populations studied elsewhere in Florida. Females matured at approximately 22 cm disk width (DW), and mature ovarian eggs were ovulated in early April. Embryos were obtained from pregnant females from 15 May to 17 July, and parturition occurred in late July, when embryos attained approximately 100 mm DW. Males matured at approximately 21 cm DW. Mate gonadosomatic index peaked in November and declined continually through the spring, but fluid was retained in the seminal vesicles until May. This population experienced total reproductive failure during the 1991/1992 season. Extremely low conductivity in the lake during the fall and winter of 1991 is suggested as a possible stressor.

Journal Title

Bulletin of Marine Science

Volume

59

Issue/Number

1

Publication Date

1-1-1996

Document Type

Article

Language

English

First Page

74

Last Page

88

WOS Identifier

WOS:A1996VB34300005

ISSN

0007-4977

Share

COinS