
TY  - JOUR
A1  - Mills, BJ 
A1  - Geddes, MC 
T1  - Salinty tolerance and osmoregulation of the Australian freshwater crayfish <I>Cherax destructor</I> Clark (Decapoda : Parastacidae)
JF  - Marine and Freshwater Research
JO  - Mar. Freshwater Res.
Y1  - 1980
VL  - 31
IS  - 5
SP  - 667
EP  - 676
KW  - 
UR  - https://doi.org/10.1071/MF9800667 
N2  - 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. 
ER  -

