
%0 Journal Article
%A Mills, BJ 
%A Geddes, MC 
%T Salinty tolerance and osmoregulation of the Australian freshwater crayfish <I>Cherax destructor</I> Clark (Decapoda : Parastacidae)
%J Marine and Freshwater Research
%D 1980/10/01
%V 31
%N 5
%P 667-676
%K 
%R https://doi.org/10.1071/MF9800667
%U https://www.publish.csiro.au/paper/MF9800667 
%X The lethal and sublethal effects of increased salinity on adult and juvenile crayfish, and the effects of increased salinity on osmotic behaviour of adult crayfish were investigated. Lethal experiments, using a wide salinity range, indicated little difference in the salinity tolerance of adults and juveniles, but when 96-h median tolerance limits were estimated using a narrow salinity range: the juvenile value was 25. Sow while that for adults was 29.90&#8240;. Sublethal effects, as determined by 'threat' and 'escape' behavioural responses with increased salinity, indicated that normal behaviour in adults and juveniles is maintained up to c. 12&#8240;, lost between c. 12 and 25&#8240;,. and death results above c. 25&#8240;,. It is suggested that the field salinity tolerance range of C. destructor is restricted to salinities where behavioural patterns are unaffected. C. destructor is a hyperosmotic regulator, maintaining its blood concentration at approximately 410 mOsm up to 14&#8240;, above which the blood concentration follows the isosmotic line. The possible evolution of this species is briefly discussed in terms of osmotic behaviour. 
