Reproductive ecology of Garra ghorensis, a critically endangered fish in Jordan
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Authors: Hamidan, N. and Britton, J.R.
Journal: Environmental Biology of Fishes
© 2014, Springer Science+Business Media Dordrecht. The life history traits of desert fishes indicate their resilience to environmental change and vulnerability to extirpation and extinction. Garra ghorensis is a small (<140 mm) riverine cyprinid fish endemic to the Southern Dead Sea area and is critically endangered through habitat loss and invasive species. Here, the reproductive ecology of three Jordanian populations of this species were assessed through the collection of monthly samples between February 2011 and January 2012 in a region where air temperatures ranged between below 0 °C and over 40 °C through the year. Samples contained fish up to 137 mm fork length, with most <100 mm. Fish matured at length below 40 mm and at ages <1 year. Except one population of female dominated, sex ratios were not significantly different from 1:1. Reproductive effort, as gonado-somatic index (I