Keith F. Walker

4 Questions 14 Answers 0 Followers

Questions related from Keith F. Walker

Why do sex ratios vary, in freshwater mussels?

In reviewing research on Australian species (Hyriidae), I’ve encountered many examples where sex ratios are clearly biased towards males or females. These often are large samples, numbering in the...

19 January 2016 9,739 10 View

Is pedal feeding a key to survival of adult freshwater mussels in oligotrophic waters?

Pedal feeding is associated with juvenile freshwater mussels, yet some species (e.g. Margaritifera margaritifera) live in streams with a consistently low supply of suspended organic particles as...

09 November 2015 7,615 3 View

Is there a proven field preservative for DNA when ethanol is not available?

When collecting freshwater mussels in remote areas, it’s often impractical to use ethanol as a preservative. Especially for amateur collectors without access to laboratories. Samples collected in...

02 November 2015 8,470 3 View

Why do some freshwater mussels have thin shells in ‘hard’ water?

With colleagues*, I’m intrigued by a situation in a karst spring in Australia where the shells of Hyridella narracanensis are thin and fragile, whereas in rivers that do not contain hard water the...

22 October 2015 3,041 7 View