EUASTACUS YARRAENSIS
COMMON NAME: YARRA / OTWAY SPINY CRAYFISH
COLOUR:
YARRA - Body dorsally blue or blue/green. Chelae cream to white on adults.
OTWAY - Body dorsally brown or red/brown. Chelae cream to orang/red on adults.
LARGEST SIZE OBSERVED: 8.0 cm CARAPACE LENGTH, 270 gms WEIGHT
LARGEST SIZE (THIRD PARTY): xx cm CARAPACE LENGTH, xx gms WEIGHT
INCREASE IN CARAPACE LENGTH AFTER MOULT:
Measuring moult shell and comparing to crayfish approximately 10 days after
Moult.
| OLD CARAPACE LENGTH (cm) |
NEW CARAPACE LENGTH (cm) |
INCREASE IN LENGTH (cm) |
SEX | MOULT DATE |
| 3.7 | 4.1 | 0.4 | M | 2006 |
| 4.4 | 4.8 | 0.4 | M | 2006 |
| 5.1 | 5.5 | 0.4 | F | 2006 |
| M | 23/02/2007 | |||
NOTE: One of our Otway (redish) crayfish moulted to blue and then changed back to red after 3 days.
BROOD STOCK BERRIED: Late
May
2005,
Mid April 2006
JUVENILES RELEASED:
Early December 2005,
MINIMUM MATING SIZE: xx cm CARAPACE LENGTH OBSERVED TO DATE.
DISTRIBUTION:
Southerly flowing streams of Victoria from the Bunyip/Tarago system
in the east to the Gellibrand river of the Otway region in the west.
CONSERVATION STATUS: Unknown.