Jump to content
Sign in to follow this  
wayne6442

Redclaw Crayfish ( Cherax quadricarinatus)

Recommended Posts

wayne6442

  Cherax quadricarinatus (Redclaw Grayfish)    Back in 1985, I started a semi commercial venture breeding Redclaw Crayfish for the commercial market. My set up consisted of four 5,000 litre above ground swimming pools, set side by side with an overflow water exchange feature, a swimming pool pump and a pool sand filter. Water pick up for filtering was regulated from each pool passed down a common pipe to the filter, and from there the water was returned to the ponds via a spray system from above. This ensured that the returning filtered water was well airated for the redclaws.     My initial stock consisted of about 400 wild caught Redclaws from Northern Queensland split roughly between the four pools. About three weeks before stocking I seeded each pool with about 10 kilos each of mud from a local dam and cow manure from a dairy farm,to set up the bio eco system that the cray's would need     This venture ran well for about three years, I was supplying my restaurant and others with live crayfish an a weekly basis.  AND THEN!!!  the government started to interfere by imposing strict live fish trading rules and introducing very expensive licensing fees. Unfortunately, The combination of both were enough to force me to close down my enterprise.  

 (Cherax Quadricarinatus)!  Redclaw Crayfish  also known as the Tropical Blue crayfish,and Australian Freshwater Crayfish.     Redclaw crayfish are a moderately large crayfish, and can reach lengths of over 90 mm and weigh in anywhere between 300 and 600 grams. They have a smooth body which is greenish/blueish in colour, the male of the species is distinguished by a bright red colouring on the margins of their large claws.     The Redclaw is native to the upper reaches of the rivers in north eastern Australia and Papua New Guinea. It's preferred habitat is in high turbidity,slow moving streams or static waterholes. Redclaw prefer sites with abundant aquatic vegetation that provides cover. Redclaw do not burrow into the riverbanks like other Cherax species but prefer to hide in natural depressions,under rocks or amongst vegetation.       Female Redclaw brood their eggs for six to ten weeks, depending on temperature. Most produce between 300 to 800 eggs per brood and they sometime breed five to six times per season. Water temperature is important  for breeding with the preferred range being 23 C to 31 C. Hatchling's resemble the adults and remain attached to the undersides of the female for several weeks before becoming independent                                                     5aacc7ed7eec5_redclaw3.jpg.97f19c627af3be7e7ff16f3ea7801bbf.jpg  male Redclaw
      Redclaw are NOT good aquarium tank mates, DO NOT KEEP THEM IN WITH OTHER FISH OR PLANTED TANKS. Although more placid than their other Charex cousins, they can get very agro when they have a mind to. My tip is to house them in a large aquarium 60 cm or larger with plenty of structure for hiding places so as they can get away from each other especially during times when they are moulting. The female also becomes very territorial when berried. FEEDING: They are omnivores but tend to eat more vegetable material, I have known them to munch into driftwood in their tank, they are not good fisherman being slower than  other Cherax species, but that does not exclude fresh fish from their diet. They do like chicken pellets, a very small piece of red meat , worms, and fish.

     I found that water temperature at around 25C to be good ( don't go up to 31C) good filtration with plenty of surface movement. PH between 6 and 7.5 although they can stand higher. Selective Breeding : I found the Redclaw to be relative easy contender for selective breeding ,having success in breeding a beautiful deep blue, pale blue, a deep green and an almost albino over successive generations. I also found that sometimes they will revert back to their original colours when severely stressed. I hope that this article will help some of you who are contemplating keeping Redcaw Crayfish.

 

5aacc7b681ac9_bluered.jpg.1ecd2fb7c2cd1d5c2e99f47d6f189e9f.jpgMale Blue                 5aacc809f0baa_redclaw6.jpg.bc8ca5026ace1efdf24a3622af356658.jpgFemale White

 

Disclaimer : The information contained in this article is purely from my own experiences and is by no means intended to be completely right in my findings Wayne Summerhayes

 
  •  

View full article

Share this post


Link to post
Share on other sites
waffle

Awesome article! First time I've seen such an intense white breed! Do you still breed those?

Got any pics of the green ones?

I keep my large male with a ton of fish and shrimp and he's never shown aggression to them. He lets the catfish and shrimp clean his shell... even has a particular spot he walks to when he wants them to clean him. But I suppose any day he could turn evil :O

  • Like 1

Share this post


Link to post
Share on other sites
Cesar
11 hours ago, waffle said:

even has a particular spot he walks to when he wants them to clean him

LOL... that is pretty cool... I have seen this behavior before... awesome...

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Similar Content

    • wayne6442
      By wayne6442
      Cherax quadricarinatus (Redclaw Grayfish)    Back in 1985, I started a semi commercial venture breeding Redclaw Crayfish for the commercial market. My set up consisted of four 5,000 litre above ground swimming pools, set side by side with an overflow water exchange feature, a swimming pool pump and a pool sand filter. Water pick up for filtering was regulated from each pool passed down a common pipe to the filter, and from there the water was returned to the ponds via a spray system from above. This ensured that the returning filtered water was well airated for the redclaws.     My initial stock consisted of about 400 wild caught Redclaws from Northern Queensland split roughly between the four pools. About three weeks before stocking I seeded each pool with about 10 kilos each of mud from a local dam and cow manure from a dairy farm,to set up the bio eco system that the cray's would need     This venture ran well for about three years, I was supplying my restaurant and others with live crayfish an a weekly basis.  AND THEN!!!  the government started to interfere by imposing strict live fish trading rules and introducing very expensive licensing fees. Unfortunately, The combination of both were enough to force me to close down my enterprise.  
       (Cherax Quadricarinatus)!  Redclaw Crayfish  also known as the Tropical Blue crayfish,and Australian Freshwater Crayfish.     Redclaw crayfish are a moderately large crayfish, and can reach lengths of over 90 mm and weigh in anywhere between 300 and 600 grams. They have a smooth body which is greenish/blueish in colour, the male of the species is distinguished by a bright red colouring on the margins of their large claws.     The Redclaw is native to the upper reaches of the rivers in north eastern Australia and Papua New Guinea. It's preferred habitat is in high turbidity,slow moving streams or static waterholes. Redclaw prefer sites with abundant aquatic vegetation that provides cover. Redclaw do not burrow into the riverbanks like other Cherax species but prefer to hide in natural depressions,under rocks or amongst vegetation.       Female Redclaw brood their eggs for six to ten weeks, depending on temperature. Most produce between 300 to 800 eggs per brood and they sometime breed five to six times per season. Water temperature is important  for breeding with the preferred range being 23 C to 31 C. Hatchling's resemble the adults and remain attached to the undersides of the female for several weeks before becoming independent                                                       male Redclaw
            Redclaw are NOT good aquarium tank mates, DO NOT KEEP THEM IN WITH OTHER FISH OR PLANTED TANKS. Although more placid than their other Charex cousins, they can get very agro when they have a mind to. My tip is to house them in a large aquarium 60 cm or larger with plenty of structure for hiding places so as they can get away from each other especially during times when they are moulting. The female also becomes very territorial when berried. FEEDING: They are omnivores but tend to eat more vegetable material, I have known them to munch into driftwood in their tank, they are not good fisherman being slower than  other Cherax species, but that does not exclude fresh fish from their diet. They do like chicken pellets, a very small piece of red meat , worms, and fish.
           I found that water temperature at around 25C to be good ( don't go up to 31C) good filtration with plenty of surface movement. PH between 6 and 7.5 although they can stand higher. Selective Breeding : I found the Redclaw to be relative easy contender for selective breeding ,having success in breeding a beautiful deep blue, pale blue, a deep green and an almost albino over successive generations. I also found that sometimes they will revert back to their original colours when severely stressed. I hope that this article will help some of you who are contemplating keeping Redcaw Crayfish.
       
      Male Blue                 Female White
       
      Disclaimer : The information contained in this article is purely from my own experiences and is by no means intended to be completely right in my findings Wayne Summerhayes
         
    • wayne6442
      By wayne6442
      Australian Freshwater Crab
       
       
      Freshwater crabs can be found in the tropics and subtropics in most parts of the world. Out of a total of 6,700 species , there are more than 1,300 described species of freshwater crabs,and many more currently unknown to science.
      The IUCN (International Union for Conservation of Nature ) Red List has assessed all described species as “ data deficient”, as data on their ecology, reproductive biology and habitat requirements is lacking.
       
                                                                                       (Austrothelphusa Transversa)
                                                         
         
      The majority of species studied to date tend to occur in small geographic areas, have poor dispersal abilities and low fecundity (the ability to produce an abundance of offspring) thus making them highly susceptible to land use alterations, river regulation changes and climate change.
      Scientists in Australia are investigating the biology and ecology of our remarkable freshwater species in the tropical regions of northern Australia and the Torres Straits. Very little is known about many of the far northern species, however science has discovered that they have an amazing lifecycle, these crabs will dig tunnels in the creek banks at the end of the wet season and spend the hot and dry times in a prolonged state of torpor/dormancy, emerging again at the onset of the next seasons rains presumably to feed and reproduce. Females of the species A. Transversa have been documented carrying their young
      under their abdomen underground during the dry season and when the wet season arrives they will leave their mother growing up quickly before the next dry season.
       
                                                                                     
                                                                                                               A.Transversa
      The most common species of freshwater crab found in the aquarium market in Australia are the Holthuisana sp. (Austrothelphusa) There are several sub species in this order:
      A. Agassizi
      A. Angustifrons
      A. Receki
      A. Tigrina
      A. Transversa
      A. Valeatula
      A. Wasselli
      With the most common on the market being A. Transversa and A. Agassizi :
       
       
       
       
                                                                                         
                                                                                       
       
                                                                                     A. Agassizi (Freshwater Brown Back Crab)
       
      CARE:
      The two species A.Agassizi and A.Transversa are by nature amphibious and should be provided with an “Island” where they can leave the water at will . It seems they require atmospheric air for their gills to operate properly.
      In nature these crabs frequent inland rivers and billabongs in northern Australia that dry up in the winter.
       
      Water Quality:
      Temperature: 18 deg C. to 25 deg C.
      pH: 6.5 ------7.5
      General Hardness Soft /Moderate
      The freshwater crab can not survive for long in very acid water. Make sure their wateris free from ammonia,nitrate and copper.
      Feeding:
      A true scavenger, they will eat most types of sinking fish food, blood worms, fresh vegetables
      and sometimes aquarium plants.
      Colour and Varieties:
      The A. Agassizi ( Brown Back Crab) can come in a variety of colour patterns e.g with an attractive pale fawn colour, with a chocolate brown irregular band crossing from front to back of the carpace or even a tiger stripe pattern. While the Colours of A. Transversa is mainly a shade of brown from yellowish to deep redish.
                                                       
                                                       
       
      Housing:
      Both species are great escape artists and can easily climb the silicone in the corners of most tanks. I have had them climb up air hoses and the water pick ups for the filters.
      They are fairly peaceful and can be trained to come to your fingers for food. If kept in a community tank ensure that there are no slow fish as the crabs are not adversed to a little fresh fish in the m
                                                                                                   
       
       
                                                                         
       
      Disclaimer:                                                                         A. Transversa
      The information provided here is of a general nature only.
      Citation: The IUCN red list
      Dr Nathan Waltham: Ecology of Freshwater Crabs in Tropical northern Australia


  • Must Read SKF Articles

  • Join Our Community!

    Register today, ask questions and share your shrimp and fish tank experiences with us!

  • Posts

    • jayc
      ✌️   Absolutely only use bleach as the last resort, with nothing in the tank. (6parts water to 1part bleach for future reference). Even white vinegar is safer and probably just as effective for removal of planaria and worms. After you clear the old tank of gravel, give the glass a quick wipe with a vinegar soaked kitchen paper towel. Rinse and let dry in the sun. Use vinegar if that wasn't clear.   Set up the new tank as desired. If your other tanks are free of pests, you can use the filter media to seed this new tank. Wash the filter media in the water of the new tank. Yes, it will be dirty for a while, but you will have seeded it with millions of beneficial bacteria and probably cycle the new tank in a week.   PRL, real PRL, are pretty rare in Aus.  They will demand a high price for them, so check the legitimacy of the PRL. Find out the PRL history. Nice looking CRS is not the same as PRL.     
    • DEL 707
      Thanks. Think I'm going to order from Pro Shrimp, get 5 cheeries and 3 amano, just to play it safe.
    • Crabclaw
      Dang I thought u might say that... for some reason the guy at my rlfs (relatively local fish store) recommended them instead of honey gouramis as a bit of a feature fish. Are there any other ‘feature fish’ style fish that wouldn’t munch on my shrimp, or should I just have my endler trio? I’ll check out the page.
    • incomplet
      Hi Simon,  Thanks for the warm welcome! I've been using the GenChem No Planaria; honestly it worked so well the first time and most of the snail population/worms all disappeared and i tried to remove most of the larger rotting worms but didn't have a single casualty, they were Neocaridinas and i guess they were much hardier. But i did notice the packet wasn't sealed properly when I went back to use it a few months later. I haven't seen the SLAqua Z1 available in Australia before.  I used to own a marine aquarium previously with fish only; then i changed after a few years to a planted aquarium with CO2 and then to a smaller set up with shrimp. Currently have three tanks (2 foot with RC Shrimp, 1 foot cube with BB and another 1 foot cube with CBS); I've never had to really restart a tank but would rather consult SKF then have a crack at it myself. I wasn't use if using bleach to rid of all the hitch hikers was the right method. And i have no idea what ratio of bleach to water I should be using for a 27L cube. Any advice would be greatly appreciated!  Yeah i think RO water at stage 6 would be a bit over kill; especially with the time it takes to make the water. Thanks for that. I've got about 40-50 with about 10 as breeding adults and the rest as juveniles still; I'm not a picky person when it comes to culling; I'm enjoying the hobby not as breeder to sell to others. I'd figure it would be good fun to pass the time, water changes and watching the little fellas shrimp around picking and prodding at things. Also i have no idea about the F1, cross breeding, taibees, taitibees, etc. just more interested in seeing the differing colors.  I set up the CBS and BB tanks at the same time which also sit next to each other; the CBS population has exploded to about 100+ shrimp where the BB is a bit slower. Is that quite common; are BB more fragile? I thought about trying to have a got at PRL. Any advice? Cheers, Dan Hey jayc, Thanks for that; phew lucky i bought a spare way nack. Yeha i have lots of denitrate left over. Also hello fellow Sydney-Sider! Dan
    • jayc
      There are so many varieties of food you can be feeding them. Have a read of this Food & Nutrition section for more ideas. Leaves, flowers, vege scraps. Frozen bloodworms. Bee Pollen.  
×
×
  • Create New...