Title: GSI data for Heliocidaris erythrogramma in Western Australia Dataset: GSI Data.txt This file provides data for the gonadal somatic index (GSI) for both subspecies of Heliocidaris erythrogramma in Western Australia, collected over fortnightly intervals between Oct 2009 and June 2010. These individuals were collected and assessed by Rachel Binks who can be contacted by email (rachel.binks@grs.uwa.edu.au). The first column refers to the subspecies collected: HEA = Heliocidaris erythrogramma armigera and HEE = Heliocidaris erythrogramma erythrogramma. The year column refers to the year of collection; because spawning occurred over the southern hemisphere summer (OCT-JUN), the year is given in terms of adjacent years (e.g. 2008/2009). Each month is represented twice because collections were made fortnightly. The columns GSI and SE represent the average gonadal somatic index and standard error, respectively, calculated for each collection period.