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Purchase and keeping of Macrobrachium
rosenbergii (crayfish)
Source: Creig Upstrom Aquaculture of Texas, Inc. 4141 Fort Worth Highway Weatherford, TX 76087 (817) 594-4872 Fed. ID Tax #: 75-2115768 Ordering: Macrobrachium rosenbergii (egg bearing females) - $10/ea (Large adult males >1/4lb) - $10/ea (4-5" long, 15/box) - $3/ea (2-3" long, 15/box) - $2/ea Shipping: $43 for UPS or airfare (air if more than 1 box) + $5 per box
- Freshwater shrimp. Widely distributed asian species with not very large eggs. They lay eggs in saltwater so rearing maybe hard, Johnson says. - lay eggs every molt or every other molt. They molt every month or so. % will attack females during molting, specially if are not bearing eggs. So careful with animals in small aquaria. - Keep tanks well cleaned/aeriated. Biological filters are important to prevent accumulation of NH3. Tanks kept at 84NF. - Keep in freshwater but put them in saltwater/freshwater at 6/1000 dilution when the eggs turn grey (they are bright orange initially, turn brown later and grey about 1 week before hatching). Immediately after hatching (and NOT later than 24-48hrs after) transfer the larvae to a 12/1000 salt/freshwater tank. - # of eggs is function of size: for bigger than 50g, ~750 eggs per body g. It takes 21 days of embryonic life until hatching and then 21-30 days (12 molts) until the first young adult stage (postlarva). - Feed adults with parine chow chow or shrimp food stuff. - Feed larvae with Artemia salina only until 10 days of age. Then supplement the Artemia with finely chopped fish, squid. Feed once a day
- Souza (1987). Comp. Biochem & Physiol. 87A(2): 399-403 - Moreia (1980). J. Exp. Marine Biol. & Ecol., 47(2): 141-148. - Ling (1969). The General biology and development of M. rosenbergii. FAO Fisheries Report, 67(3): 599-606, 607-619. - Uno & Kwon (1969). Larval development of M. rosenbergii. J. Tokyo ... |
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