is there a difference between antennae of female shrimp and male shrimp?
438770
There is often confusion regarding the difference between a shrimp and a prawn. Physically they look very similar but there is one sure way to tell them apart. In shrimps or carideans the side plate of the second segment of the abdomen overlaps the segments in front and behind. Prawns, most of which belong to the family Penaeidae of the group Dendrobranchiata, have all the abdominal side plates overlapping tile-like from the front. A more fundamental difference but one impossible to appreciate in a single specimen is that female prawns do not brood eggs but shed them into the currents where they develop independently. It would therefore make sense to call all member s of the Penaeidae "prawns" and members of the Caridean "shrimps" and this is what most Australians do. King prawns and banana prawns are names understood in this continent for penaeids sold frozen at the markets. The tiny shrimps bought in cans or froz en are imported carideans. Confusion arises when we hear Americans refer to prawns as "shrimp".
1163537
hermaphrodites have both sets of sex organs.
398186
Notostracans (often just called Triops, tadpole shrimp or shield shrimp) are small crustaceans in the Branchiopoda group. Triops have internal compound eyes and a flattened shield covering the head and leg-bearing segments of the body. The order contains a single family, with only two extant genera. Their external morphology has not changed since the Triassic (appearance of Triops cancriformis around 220 million years ago). Triops cancriformis may therefore be the "oldest living animal species on earth" (Kelber, 1999).\n\nTadpole shrimps usually live near the ground of astatic pools, where they move with their ventral side down. However, lack of oxygen can force them to swim upside-down with their gill-like legs close under the surface of the water. Notostraca are omnivorous; they dig around in the mud using the frontal part of their shield, looking not only for plankton but also for larger prey such as worms, chironomid larvae and even weak tadpoles. Anostracans, often associated with notostracans, can also be a considerable part of their prey (especially when weak or dying).\n\nNotostracans sometimes even cannibalize freshly moulted members of the same species. In northern and central Europe, with few exceptions, all tadpole shrimps are female, whereas sex ratios in southern and western Europe as well as in northern Africa are near unity. These "females" possess hermaphroditic glands, but instead of selfing, parthenogenesis takes place. Modified appendages of the 11th pair of limbs bear the ovisacs with the mature eggs.\n\nTriops evolved to survive in naturally temporary ponds all over the world. As inhabitants of such, there has never been any pressure for them to become long-lived creatures. These ponds usually dry up during certain times of the year when there is no rainfall. Although the adult Triops die during these droughts, the embryos remain in a state of diapause (suspended animation) until the rains return and fill up the temporary ponds once again, making it safe for them to hatch.\n\nThe maximum life spans in the lab agree with data from field observations on Triops survival. In the lab, T. longicaudatus has a maximum lifespan of about 50 days and T. cancriformis a maximum lifespan of about 90 days, with some individuals beginning to die off as soon as 2 weeks after hatching. Secondarily, some may suffer premature deaths from moulting complications or other reasons.
1170155
LOL..Its cute. I wouldnt really consider the name "roach" really having a gender associated with it.
613563
What you're looking for is Krill, they're tiny arthropods in the same family as shrimp.
1124333
they have horns. Look for small antennae at the back of their head too thats a sure sign that they are good freinds. Just keep those bots away from water
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absolutely...hermaphrodites occur in just about any living organism that has differentiated genders...it's caused by a mix-up in the genetic pattern that determines physical gender differences during gestation/maturation...
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Take him to your local brid bander...a professor of ornithology at your local college... he will blow on the feathers just above the anus in an upward direction, this patch of skin will have variations based on sex.  A female will have a more fatty patch of padding in this area.  A brood patch.
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Damn, that's hard!  Probably the jilted woman who sewed shrimp into the curtains of her house....the man and his new girlfriend couldn't find the source of the smell, so they moved from the house...and took the curtains with them!
478585
you cant tell sex till light changes ..or you till\nchange light artificially.They wont get pollinated unless you plant them near pollinating marujuana male which chances are low in the wild.Just put them outside and pluck those males as they appear
891317
Sea-Monkey is a brand name of a hybrid of Artemia salina, a species of brine shrimp. These are a type of fairy shrimp—not true shrimp, but a branchiopod. The term Sea-Monkeys (sometimes unhyphenated) is a trademark used to sell them as a novelty gift. They originate in salt lakes and salt evaporation flats.\n\nSea-Monkeys can reproduce both sexually (requiring a male and a female) and asexually. When the eggs are laid, there are fewer males than females per "litter". This is probably because they are not needed for reproduction. Females stop reproducing with the males when the males are too few.\n\nSea-Monkeys have been cited in studies of DNA and sexual behavior, primarily because they are commonly available specimens.\n\nYou could get more information from the link below...
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Nothing, really.  The only difference between a male and a female is that males have more testosterone, which can go to their head real fast.
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Sex determination: sex is based on number of X chromosomes. grasshopper XO male, XX is female. \n\nTaxonomy of one species of grasshopper: http://www.cnr.vt.edu/fishex/nmex_main/species/082715.htm\n\nThis is an excellent source for the feeding behavior: http://www.colostate.edu/Depts/Entomology/courses/en507/papers_1999/nadeau.htm\n\nMovement of Grasshopper:\nJointed appendages move for locomotion\nThinner at joints to allow movement\nAppendages are weight bearing: allows for crawling and jumping\nMuscles are not associated with body wall\nMuscles bundles on inside, attached to exoskeleton\nAntagonistic pairs allow movement of appendage in both directions\nThird pair of legs are long with powerful muscles for jumping\nTwo pairs of wings for flight\nAnterior pair stiff like fixed wings of planes\nPosterior pair are membranous provide lift and propulsion\n(source: http://www.ucs.mun.ca/~iemerson/lectures1001/lecfram24.html)
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Flower\nIf both sexes are in the same flower (and plant) then it is a HERMAPHRODITE\nIf not, then they will be female and male plants (of the same species)
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Yes.  The males use them during mating season to get a grip on the much larger females while mating. The evidence is in the scars on the female's back.
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The crab could be in breeding season, getting busy.\n\nIf you could find out what attracts the crabs to mate you might bait them with it, be it pheromones, specfic colours and such.\n\nNothing draws animals like sex.
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Hi, those measurements will vary according to the species and individuals, and there are many!!\nI suggest two possible sources of measurements: \n1) Papers about morphometry of any stingray (they all belong to the family Myliobatidae - may be considered subfamily Myliobatinae). See below for a good search engine for papers.\n2) Fishbase (link at the bottom), a good reliable source. They have measurement data for some species.\n\nStingrays, in contrast to "real" rays, are not so flat, their heads (especially eyes and spiracles) are raised above the disk, so the thickness will vary according to the place where the measurement is taken, but usually this measurement reflects the maximum thickness. Consider this when you calculate the volume!\nThe shape of the disk also varies according to the genera, so be sure to check it. In particular, the freshwater stingrays (genus Potamotrygon) are almost perfectly circular.\n\nBut well, to make it simpler, Myliobatis are fairly common in the South Atlantic. Here's a paper with measurements for two species:\nhttp://www2.uerj.br/~dbav/equipe/gallo/myliobatis.pdf