Determine sex ratios of green turtles along the U.S. West Coast through examinations of hormones

Metadata Updated: February 2, 2017

A testosterone (T) enzyme-linked immunosorbent assay (ELISA) was validated for use with green turtle plasma in order to determine the sex of juvenile turtles. We also compared T results on the same samples obtained from both RIA (radio-immunoassay) and ELISA techniques and found that the ELISA demonstrated excellent correspondence to the RIA for providing testosterone concentrations for sex determination. Between 1990 and 2013, 115 individual juvenile and adult green sea turtles were caught in San Diego Bay (SDB). Out of the 115 individual turtles captured throughout the study period, 61 (53%) had plasma samples archived. Using plasma testosterone concentrations we found that the SDB population was female biased (3.1F:1M), but when examining only the juveniles the sex ratio was greater at 4.6F:1M. Sex ratio assessment at the San Gabriel River location is ongoing as the number of samples collected (at present n = 7) from that population is limited and, therefore, we cannot provide a robust analysis of sex ratio of that population until additional samples are collected.

Access & Use Information

Downloads & Resources


Metadata Date February 24, 2016
Metadata Created Date March 7, 2016
Metadata Updated Date February 2, 2017
Reference Date(s) (publication)
Frequency Of Update

Metadata Source

Harvested from NOAA CSW Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date February 24, 2016
Metadata Created Date March 7, 2016
Metadata Updated Date February 2, 2017
Reference Date(s) (publication)
Responsible Party Southwest Fisheries Science Center (Point of Contact)
Contact Email
Access Constraints Access Constraints: None | Use Constraints: Disclaimer - While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Bbox East Long -117
Bbox North Lat 33.8
Bbox South Lat 32.55
Bbox West Long -118.2
Coupled Resource
Frequency Of Update
Guid gov.noaa.nmfs.inport:21738
Harvest Object Id ad619943-5002-47a6-a606-6fcaa569ebaf
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Metadata Language eng
Metadata Type geospatial
Progress onGoing
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2013-04

Didn't find what you're looking for? Suggest a dataset here.