how does a perch(type of fish) reproduce?
551469
the female expels her eggs from her body onto the floor of the lake.  the male comes along later and expels the sperm onto the eggs.
959644
some frogs, fish and shellfish are capable of this.\n\ni dont believe that any mammals can.\n\nIt seems to me that the ones that can do this are usually they type that release their eggs and spem with no consideration of who fertilizes them
383122
make like a tree and let them perch...
814280
There is no single mechanical form or chemical reaction to properly describe the process that fish gills use to remove oxygen from the water and get it into their blood system.\n\nThe site below is the single best resource to cover this topic:
271146
Sponges are aquatic sessile animals which scientifically known as Porifera. They can reproduce asexually by budding or branching at the base. \n\nThey can also reproduce sexually. They are hermaphrodites. Amoebocytes can divide to become sperm cells and liberated first. Similarly, eggs are produced and become zygotes after fertilised by sperm cells from another sponge.\n\nZygotes develop into flagellated swimming larvae. When they found suitable environment they attach to the substratum to start sessile life. \n\nThey have very strong regenerative power. Broken part can be replaced and fragments can regenerate to become new individual.\n\nAnd i think they eat plankton.\n\nhope this helps!
1062365
no, because fish have gills (breathe on the outside) unlike us we have lungs in the inside.  In my aquarium tank I have a small mouth Bass & Yellow Perch, when i feed my bass minnows he would have three minnows in it's mouth (minnows literally sticking out it's mouth)/ my perch as well.  They will swim around with half a minnow sticking out it's mouth and act like it's no big deal.  You will see this with bluegill they will take the worm and swim around with it hanging out it's mouth.  I just feed my fish (thanks for reminding me) and I took pictures so if you want to see them just e-mail and I'll send it to you.  \n-About the dead smaller fish stuck in it's throat some fish I catch may puke up fish due to exhaustion.  When i go fishing for walleyes and northern pike I've had them cough up fish on me.  I've had bass do the same.  \n-Death? He could have died due to foul hooking (not meaning snagging) but if it hook in the middle or back of the throat can kill any fish especially if it's kept out of the water to long, just cut the line and release.  It doesn't work out all the time.
1137276
There are organisms (fungi, mostly) with more than two genders. We call these "mating types." A mating type can usually mate with individuals of all other mating types except its own type.\n\nSupposing there were many mating types at first, as rare ones get unlucky they go extinct, until there are only two left. These become male and female (if they have gametes of different sizes).
935305
they have hair, are chordates, mammary glands, produce live offspring
549964
Researchers have found one of the smallest known fish on record in the peat swamps of the Indonesian island of Sumatra. \n\nIndividuals of the Paedocypris genus can be just 7.9mm long at maturity, scientists write in a journal published by the UK's Royal Society. \n\nBut they warn long-term prospects for the fish are poor, because of rapid destruction of Indonesian peat swamps. \n\nThe fish have to survive in pools of acid water in a tropical forest swamp.\n\nThe new fish was discovered by Maurice Kottelat (from Switzerland) and Tan Heok Hui from the Raffles Museum of Biodiversity Research in Singapore, while working with colleagues from Indonesia and with Kai-Erik Witte from the Max Planck Institute in Germany. \n\nRalf Britz helped analyse the animal's skeleton and the complex structure of the pelvic fin.\n\nFor more information about the Paedocypris genus check this site...\n\nhttp://news.bbc.co.uk/1/hi/sci/tech/4645708.stm
281390
Rainbow fish are some freshwater species from Asia, Australia and Madagascar, belonging to family Melanotaeniidae (they're related to silversides). They reproduce similarly to many bony fishes: they're oviparous (egg laying) with external fertilization, they lay hundreds of eggs, and they don't have parental care.\nAt least in Australian rainforests, they reproduce during the dry season where conditions are more stable.
433969
http://ndsuext.nodak.edu/extpubs/alt-ag/tilapia.htm\n\nYou will probably need a net.  They eat moss.
432140
They produce eggs and sperm which they secrete into the water.  They then mix to fertilize the eggs.  They never actually come in direct contact with one another.
479117
If the common names refer to the species I think they do, they are different species, in different families.\n\nCrappie (white or black crappie) = Pomoxis annularis or nigromaculatus (Fam. Centrarchidae)\n\nWhite perch = Morone americana (Fam. Moronidae)\n\nSince they are in different families, they are quite different biologically.
218713
External Fertilization, called spawning.  Thouh it really depends on the type of fish.  Some, like some species of sharks, have internal fertilization and the males of adapted fins that work for the insertion of the sperm, called claspers in the case of sharks.  \n\nBut in general, most fish have external fertilization.  One of the fish, either male or female, set of the nesting site.  Usually behind a small ledge of rocks so the water is turentual, which aerates the water supplying oxygen to future eggs.  The female lays the eggs there, and either right after or at the same time, the male release the sperm upstream to the brood of eggs.  This washes the unfertalized eggs with the sperm, and hopefully fertilizing most of them.\n\nhope i helped!!!
590323
Reproduction System:  Depending on the species some clams are either females or males.  Both the eggs and sperms are released into the water.  Some clams are hermaphroditic which means the clam has both male and female reproductive organs.  In the species that fertilization takes place externally, the zygote develops into a swimming larva, trochophore (Alexander 439).  In some freshwater clams the young is carried inside the female's gills for a period of time.  Reproduction can occur at two different times of the year.  "long term brooders or winter brooders" spawn basically in August to October and carry the young all winter long.  The "short tem brooders or summer brooders" spawn during the summer and the young is carry for a few weeks.  After a certain period of time are discharge from the female mussels and become parasites on fish fins, gills, and external surfaces.  This stage may last up to six weeks (Harris and Gordon 2)
617502
Though it is true that there is little parental care in most fish it does exist it varying degrees.\n\nIn most fish it doesn't go much further than finding a good spot to lay their eggs. In a few cases a fish will defend the place where the eggs are laid. \n\nIn sea-horses the males actually hold eggs in pouch on their tummy until they hatch at which point the male "gives birth" (there is no more care after this).\n\nIn general though parental care is minimal at that is why fish lay so many eggs. Biologists call this an "r" strategy of breeding (lots of young, no parental care) as opposed to a "K" strategy (few young lots of parental care - like in humans). Animals range the whole spectrum between these two extremes.
358278
Some are hermaphroditic and self-fertilize their eggs, which they keep in their gills even after hatching until the young bear shells. Others are heterosexual and spew out eggs and sperm which unite and produce independent larvae that swim for a few weeks and then settle on a substrate. See ref.