VALIDATION OF PRESUMED ANNUAL MARKS ON SECTIONED OTOLITHS OF SPOTTED SEATROUT, CYNOSCION NEBULOSUS, IN THE CHESAPEAKE BAY REGION

摘要

Annual otolith incremnet deposition has not been validated for spotted seatrout populations north of Florida. To validate the marks on sectioned otoliths of Chesapeake Bay spotted seatrout, a size-stratified subsample (n = 683) was randomly selected from a total of 2763 fish collected from June 1996 to March 1999. Monthly marginal increment frequency plots and monthly frequency of 0 marginal increment plots showed that presumed annual marks―interpreted as the distal edge of the translucent margin―formed once a year, during March and April, thus validating the sectioned otolith method in spotted seatrout of ages 1-5 for the Chesapeake Bay region.