Yabbie+++Cherax+Destructor

(//C herax Destructor // ** //)//
 * Yabbie



The yabby is a native of the Murray-Darling river system in the south-east of Australia. They have, however, spread to various parts of Australia because of their ability to adapt to different climates and water conditions. 
 * [[file:///G:/TAFE/Aquaculture/Stock/stock/species/yabby.htm#id|Identifying features]]
 * [[file:///G:/TAFE/Aquaculture/Stock/stock/species/yabby.htm#habitat|Habitat]]
 * [[file:///G:/TAFE/Aquaculture/Stock/stock/species/yabby.htm#waterquality|Optimum range of water quality]]

Yabbies are usually brown in colour, though they can range from a light beige colour to green, blue and mauve. Yabbies are smaller than most crayfish. They tend to grow to about 16 cm body length and about 70 g. The claws of the yabby are shorter than those of the marron or redclaw, and are much wider, deeper and more powerful (so be careful when handling yabbies). The main identifying features of the yabby are:
 * four keels on their head, with two keels being very obvious
 * short rostrums, with no spines on the rostrum
 * the inner edge of each cheliped has a mat of hair-like growth.

back
 * The yabby is a smooth fresh-water crayfish which is farmed in New South Wales, South Australia, Victoria and Western Australia. They are native to the catchment areas of the Murray-Darling river system. Yabbies are versatile crayfish, they adapt to different temperatures well, and can grow well in most climates in Australia. Yabbies can also survive harsh conditions. In times of drought, they will burrow into riverbanks and come out when things have improved. ||  ||


 * || **Water quality factor** || **Optimum range** ||
 * Temperature || 24 - 28°C ||
 * pH || 6.5 - 8.5 ||
 * Dissolved oxygen || More than 4 mg/l ||
 * Turbidity || 30 cm ||
 * Alkalinity || 50 - 150 mg/l ||
 * Hardness || 50 - 400 mg/l ||
 * Ammonia || Less than 0.1 mg/l ||
 * Nitrite || Less than 0.5 mg/l ||
 * Salinity || Less than 6 ppt ||  ||