Sunday, November 22, 2009
Red Claw
Redclaw is a species of freshwater crayfish native to tropical Queensland and the Northern Territory. They occur predominantly in the rivers flowing into the Gulf of Carpentaria and some easterly flowing rivers of northern Cape York Peninsula. Unlike other species of freshwater crayfish, the adult male redclaw has a distinct soft red patch on the outer margin of the claws, hence the name redclaw. Redclaw have a host of biological characteristics that make them a very suitable candidate species for aquaculture.
Thursday, November 19, 2009
murray cod
Cod breed during spring floods from August to December, usually in hollow logs on the flooded riverbank. The large eggs are guarded by the male before hatching into 8 - 9 mm fry. These large young cod, which reside in dense bank-side structures, prey on food washing off the productive flood plain. Large numbers of fry are only produced in flood years. In the South Australian section of the Murray, female cod do not necessarily spawn each year. They re-absorb their eggs during non-flood years to give their off-spring the best chance of survival during the best feeding conditions.
Yabby
Freshwater Yabby / CrayfishThe Yabby or Freshwater Crayfish is found in a wide range of aquatic habitats throughout most of NSW, in wetlands, creeks, rivers and dams. They are often disguised to look like their surroundings. The Murray Yabby grows up to 400 mm long.
Redfin is a medium sized freshwater fish native to northern Europe. Redfin were first introduced to Australia in the 1860s for angling, and are now widespread across much of NSW, ACT, Victoria, Tasmania, south-eastern South Australia and the south-western corner of Western Australia.
Redfin are popular with some anglers because of their fighting qualities and taste. However, they are also voracious predators of other fish and invertebrates, can destroy recreational fisheries in enclosed waters by building up large numbers of stunted fish and eliminating other species, and can devastate native fish populations by carrying the EHN virus. For these reasons, redfin are considered a serious pest in NSW.
Redfin are popular with some anglers because of their fighting qualities and taste. However, they are also voracious predators of other fish and invertebrates, can destroy recreational fisheries in enclosed waters by building up large numbers of stunted fish and eliminating other species, and can devastate native fish populations by carrying the EHN virus. For these reasons, redfin are considered a serious pest in NSW.
Subscribe to:
Posts (Atom)
