User account menu • Crayfish holds eggs how to tell if they are fertilized or not? I was so surprised to see the eggs, though.hmm I guess they may also spawn with no partner happens sometimes with fish too.....they may be fertilized because i think i remember hearing somewhere that they can carry sperm for a while like mollies and such.I bet they aren't fertilized. How do I tell if my Electric Blue Crayfish's eggs have been fertilized. The sperm that the male deposited will be stored inside the female, known as a "sperm plug". Since we have no male, I assume they aren't fertilized? called swimmerets) and cares for the embryos until they hatch.Based on my personal experience with marine crabs kept in captivity, I can tell you with I noticed today that she's carrying eggs under her tail. Raising them is not all that easy - they need their own tank and various, very small foods at first.Some research into blue crayfish reproduction and fry raising will help you decide if you want to do nothing and let nature take its course or try to raise them.A local fish store near me had one blue crayfish, but then she started making copies of herself and now the owner can barely keep it under control! you read and agreed to the But she will very probably eat her babies if you don't separate them. I b... JavaScript is disabled. Like shrimp, these guys will mate and the eggs are fertilized internally, then the eggs drop from the ovaries to be carried underneath. aquarium with a variety of tropical fish and everyone gets along fine. save hide report. Actually, I've been learning a lot of interesting things here in AquaticCommunity. If you want to know if your egg has been fertilized, crack it and look for the blastoderm — a white spot on the yolk, or maybe even blood spots. she carries the eggs under her abdomen and fans them with her pleopods.I hope this answers your question! She's in a community tank with several knife fish and a baby senegal. log in sign up. I'm taking care of some blue crayfish for a professor in the Zoology department, and she would like them to breed - if possible. Thank you very much William. I would like to tell you that some Crayfish species are parthenogenetic, i.e., they don't need fertilization to lay fertile eggs. The isn't any other crayfish in the tank just her, we have had her over a year now and she is 6inches long. as long as the eggs aren't white or fungusy they should be fertile,they usually eat them if the eggs are no good or if they are stressed out. I work with parthenogenetic crayfish in UC Berkeley. Sometimes it is hard to see but all eggs have a blastodisc. And if she is berried, they are fertilized because she only gets berried after she's mated.They'll hatch. I bought her around February and she's now carrying eggs under her tail. share. Still, it will probably be a good learning experience for your students to observe how
what do you do with parthenogenetic crayfish in UC Berkeley?Sounds like we have a new shrimp and crayfish expert on the forum. By entering this site you declare I have collected juvenile female rock crabs (All things considered, I'd have to say that your crayfish's eggs are unfertilized and won't She was in a tank with lots of other crayfish, but like I said, we've had her for a long time. I'd like to see a link that says that if it is true. Oh, the American relative of this Crayfish is the species Procambarus fallax, from Florida.Sorry for the huge text, I just love discussing this beautiful creatures and the amazing ways nature has found to reproduce life.Thank you very much William. I've read that crayfish can store sperm for up to 6 months. I did some poking myself, and there are quite a lot of sites for crayfish!As I said, I had my female all alone, so I don't have experience with breeding Cherax sp. She carries the fertilized eggs on her pleopods (abdominal appendages, also fertilizaton the male must place them directly onto or into the female's body. We say she is 'berried'. 0 1 0. Crawfish eggs are typically laid and fertilised in the burrow where they become attached to the swimmerets on the underside of the female’s tail. perse. The sperm of these animals are not flagellated and do not swim, so to insure female stores sperm for a while, then as the eggs are laid they pass over the sperm and are Wow, I think it's cool that your 3rd grade students are learning about crayfish! If the eggs have been fertilized, the small white dot will have a bullseye type ring around it. Eggs are already inside the female and has to be mature enough to be extracted, so there may be a long period of time before the eggs come out. If she's in there with males, I would imagine that they are probably fertile. She's the only cray that I have. At the moment I would be rather called a "potential" expert in shrimp and crayfish. I've had a blue crayfish for about 4 months.
hatch. crayfish. She's in a 50 gal. Thanks for sending it to us.