Hybridization in Australian Freshwater Crayfish - Production of All-Male Progeny

C.S. Lawrence, N.M. Morrissy, Phil Vercoe, Ian Williams

Research output: Contribution to journalArticle

Abstract

In freshwater crayfish aquaculture high densities can result from uncontrolled reproduction. Hence some farmers manually sex yabbies Cherax albidus and stock only male crayfish in farm dams or ponds. Although male-only yabby populations produce an estimated 70% increase in gross income, hand sexing is time consuming and prone to error. A hybridization experiment using freshwater crayfish from the yabby species complex, collected from geographically isolated regions throughout Australia, revealed a hybrid between Cherax rotundus females and C. albidus males which consistently produces only male progeny. This has been confirmed in nine crosses of the same two species. The reciprocal cross of C. albidus females x C, rotundus males produces both male and female progeny. The consistent production of only male progeny by hybridization has not been recorded previously for a crustacean.
Original languageEnglish
Pages (from-to)651-658
JournalJournal of the World Aquaculture Society
Volume31
Issue number4
Publication statusPublished - 2000

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