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Breeding Crayfish
In the text below I shall try to give a short overview of some of the basics when breeding crayfish. Particular species may have other behaviours and demands. It should be said that my main experience as an aquarist is with relation to fish, but I shall try to convey what little knowledge I have. Sexing Crayfish Sexing crayfish isn't always easy. The genital openings are located in different places on the body depending on whether it's a male or a female. Males have their genital openings behind/under their posterior pair of legs. Females have their genital openings under the third pair of legs counted from the posterior. However, many individuals have a male as well as a female genital opening, making the sexing much more complicated. But these are always either male or female; usually male but you can't be sure. Mating and egg carrying In aquariums, spawning is possible any time of year. The male makes a little sperm packet and places it on the female's stomach. The female then spawns her eggs, passing them through the sperm packet so that the eggs get fertilized. It is not uncommon for the female to lose a claw during this process. She then places the eggs under her tail where they will be kept until they are ready to be released. How long this will be depends on the water temperature and the species, but it will be at least 4 weeks. A lot of other factors can also affect the length of the egg carrying period, such as water quality, and food supply and quality. The mother will watch over the young for a short time after birth. Fry The fry are very small when they are born but are fully developed miniature crayfish. Fry are usually detritus feeders, which means that they will feed on any decomposing plant parts and food leftovers they can find while scouring the bottom. Vegetable food is preferred and they can be fed boiled lettuce leaves that are left to decay in the aquarium. Be aware of the water quality. Fry are often very cannibalistic and a large aquarium is required if you want a higher number of fry to survive. Sorting fry for size may help the survival rate. Breeding Now you know about their breeding behaviour and how to raise the fry, but how can you get them to breed in the first place? Well, first of all you have to give them the right environment and good food to get them in a condition in which they can spawn. Some species also need different triggers to breed. These triggers may be a change in the amount of light and number of light hours, a change in temperature, change of circulation, etc. Feeding Crayfish usually accept most kinds of food, and I would recommend feeding them a diet based on boiled lettuce, sinking pellets, shrimps, and once or week or so, fish meat. This will get them in good condition and help the female survive the spawning period since she usually doesn't eat while she is carrying eggs. Housing/environment Many crayfish species can be kept in relatively small aquariums, but I recommend using larger aquariums since this lowers the pressure on the females by the males. The aquarium should be decorated so that a lot of hiding places of suitable size are provided. Hiding places can be created using rocks, roots, flowerpots, coconuts, PVC pipes, and so on. It's important that there is at least one, and preferably several hiding places for each crayfish. By William Berg of Sweden, for http://www.aquaticcommunity.com About The Author Article by William Berg originally published at http://www.aquaticcommunity.com. Article may be reproduce as long as it is not edited and a live link to http://www.aquaticcommunity.com is placed in the article header. (java links and PHP links are not allowed) Included this resource box "as is with live links" on the bottom of the page.
Latest News:Site: Yahoo! News Search Results for news News Corp. says Mark Williams interim Premiere CEO (Reuters via Yahoo! News) Mark Williams, a News Corp. executive named late on Wednesday as chief executive of German pay-TV broadcaster Premiere, has taken over in an interim capacity, a News Corp. spokeswoman said on Thursday. News Corp exec becomes chief of Germany's Premiere (Reuters via Yahoo! News) News Corp's chief financial officer for Europe and Asia has been named chief executive of German pay television group Premiere, following the resignation of Michael Boernicke, Premiere said on Wednesday. Premiere CEO Is Replaced by News Corp.'s Williams (Update2) (Bloomberg.com) Sept. 10 (Bloomberg) -- Premiere AG , the German pay- television company partly owned by News Corp., said Chief Executive Officer Michael Boernicke is being replaced by a senior News Corp. executive. News Corporation to redevelop London Wapping site (Reuters via Yahoo! News) Rupert Murdoch's News Corporation is to redevelop its Wapping site in London, moving all its UK businesses, including News International, Harper Collins, MySpace and Dow Jones, under one roof. DeJesus, Royals sad at Sweeney news (MLB.com) DeJesus, Royals sad at Sweeney news Phila. mayor to announce grim budget news (Philly.com) The Nutter administration is expected to announce grim budget news today, which is all but certain to lead to significant spending cuts - perhaps as high as 10 percent - in some city departments, according to three sources familiar with the budget. Tribune blames Google for damaging news story (Market Watch) SAN FRANCISCO (MarketWatch) -- Tribune Co. said Wednesday that the mistaken online publishing of an old news story that cratered UAL Corp.'s stock price earlier this week was because of a repeated technology failure at Google Inc. Get the latest news in racing (Daily Racing Form) In order to read Daily Racing Form's free daily news stories it is required that you have a DRF.com free membership. If you do not have a DRF.com free membership, please register here . You will NOT need to be logged in to read each day's free news stories. UPI NewsTrack Entertainment News (UPI) Chesney nominated for 7 CMAs ... Hoffman: I'm not playing Penguin ... 'RocknRolla' No. 1 at U.K. box office ... Jessica Simpson stops song on 'GMA' ... News from United Press International. Kyodo News agency says three inmates executed (AP via Yahoo! Malaysia News) Kyodo News agency says three death-row inmates have been executed in Japan. Site: news - Google News Amid Gaza violence, a new task for Obama - USA Today
MORE RESOURCES: Site: Yahoo! News Search Results for fishing Fly-fishing for these salmon is simple, fun (Detroit Free Press) SAULT STE. MARIE, Ontario -- Going after pink salmon is perfect for anyone who wants to learn how to catch salmon on a fly rod. The techniques are so simple and so much fun that they should call this Salmon Fishing 101. INSIDE THE OUTDOORS: Fishing by the numbers? Try a 7 (Detroit Free Press) My standard fly-fishing tackle for chinook salmon and steelhead used to be a nine-foot, eight-weight rod with a traditional floating line. But for pink salmon I've sometimes used a six-weight trout rod for fish that run two to five pounds. They're considerably stronger than trout of the same size, so using a six-weight really revs up the sporting factor with these fish. Fishing report: Sept. 11 (The Tennessean) FISHING REPORT South Florida fishing report (Miami Herald) With water levels more than 15 feet in Lake Okeechobee, Howard Kleeman of Slims Fishing Camp in Clewiston reported that largemouth bass are scattered and moving further up into the grassy areas, where they have not been able to get in years. . . . Largemouth bass are being caught in the Moon Shine Bay area, Pelican Bay and the west side of Red Island. The bass are eating swimming frogs, shiners, ... Fishing derby designed to promote sport of fishing to kids - and parents, too (Morris Daily Herald) The third annual Just 4 Kids Fishing Derby is just as much for the parents as for the kids, Troop 471 leader and derby organizer Dana Morse said. Pittsburgh hooks big-money fishing tournament (Pittsburgh Tribune-Review) Pittsburgh will host another big money fishing event on the Three Rivers in July and August, 2009, with $1 million guaranteed to the winner. Fishing report: Sept. 11 (The Longview News-Journal) AUSTIN (AP) ? Here is the weekly fishing report as compiled for the Texas Parks and Wildlife Department for Sept. 10. (Report also available on Web as www.txfishing.com.) Of the Outdoors ? Jig Fishing: The Ultimate Catching Tool (Yankton Press & Dakotan) With all of the traveling I do, I have the opportunity to talk with a lot of anglers. At a recent in store promotion, I was talking with a group of fishermen talking about different fishing techniques. Boy Scouts set to host fishing derby Sept. 13 (Morris Daily Herald) Morris Boy Scout Troop 471 will host its free Just 4 Kids Fishing Derby on Saturday, Sept. 13, at Gebhard Woods State Park in Morris. PHOTO GALLERY: Fishing Rodeo in Fairview Heights (St. Clair County Journal) The pond at Everett Moody Park in Fairview Heights was the place to be for young anglers on Aug. 30 as Elk?s Lodge 664 and Mayor Gail D. Mitchell sponsored the 16th annual Kid?s Fishing Rodeo. Site: fishing - Google News Fishing/hunting report - San Diego Union Tribune
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