How would different types of ocean pollution would affect crabs?
919219
Chesapeake Bay-nutrient pollution:\nLike other aquatic animals in Chesapeake Bay, blue crabs are vulnerable to summer's low oxygen conditions. ...nutrient pollution from farms, sewage treatment plants, homes and the exhaust from cars fuels algal blooms that remove oxygen from the water. When they are trapped in crab pots,  crabs often die from low oxygen levels. Also, pollution has reduced seagrass, which is crab habitat.\nhttp://www.chesapeakebay.net/info/blue_crab.cfm\nww.nationalgeographic.com/xpeditions/ lessons/14/g68/chesapeakescienceteacher68.pdf\n\nOil spill: non-point oil pollution can get into coastal waters and kill crabs.\nhttp://www.oceanservice.noaa.gov/education/kits/pollution/media/supp_pol012b.html\n\nFiddler crabs in marshes: \nHeavy metals such as mercury, copper, and zinc are toxic to fiddler-crabs. So are pesticides.\nhttp://www.amnh.org/nationalcenter/youngnaturalistawards/2000/gaurav.html
192654
We won't know for sure for a while, but we can speculate.\n\nGlobal warming primarily affects stom cycles, sea level and salinity, average temperature, etc. So think about how all those things could affect some animals.\n\nAlso note that not all animals will be affected, since some are more adaptive than others.
517227
You don't mention human or animal.  Salinity will effect the speciation of the mercury present and thus the toxicity.  For more try searching at:\n\nhttp://www.scirus.com/srsapp/\n\nhttp://www.scienceresearch.com/search/\n\nhttp://www.epa.gov/waterscience/models/aquatox/\n\nfile:///C:/Afiles/Henry/Henry2.htm#ENVIRONMENTAL_FEDERAL_TOXICOLOGY
545771
Effects of deforestation.\n\nthis can be a local problem with global consequences.\n\ncan be biology and chemsitry (maybe physics as well, heat flows etc.)
222177
There are many.\nIt depends on what species you are farming.\nFish can get a number of nasty pox family virus when in the close confines of aquaculture. RSIV The red seabream Iridovirus is another nasty one. Clams and other molluscs are susceptible to Norwalk virus and many others.\n\nit would help if yu could narrow down the type of aquaculture and the species you wish to know about.\n\nhttp://rfdp.seafdec.org.ph/publication/paper.html  has some good journal mentions.\nhttp://www.daasix.org/committee/executive_committee.htm  is the definitive source on this topic.\n\nCauses: Often over crowding, stress and wrong nutrition. Diagnosis, often visual, but also poor growth, poor breeding. Control. Medication sometimes works, but is not the answer. More infrastructure and monitoring helps.
320955
One reason maybe the pollutants that are in the areas that will be reflooded.  We do not know the impact they will have on the rest of the ecosystem.
351457
Well hypothetically, if something were to happen...say aliens came down & sucked up the oceans... (LOL)\n\n1.)Weather...the weather is greatly affected by the oceans. Most of the moisture that precipatates as rain evaporated from the oceans. So you are looking at LITTLE to NO RAIN! That should tell you what would happen to life. We would be in major trouble! Also the ocean currents help control climates in places in the higher latitudes such as England & the rest of northern Europe. Warm water currents help make these latitudes warm enough to be habitable. No ocean means no current.\n\n2.) No more flounder, crabs, oysters, scallops, or any other yummy seafood! The only benefit I see from this is that jellyfish would become extinct. But since we would too I guess it wouldn't really matter anyways. LOL.
880454
crabs, sea birds, sea stars, humans
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The answer is B, Humans.  This is because as with most toxic chemicals in trace amounts the organism at the top of the food chain is more likely to ingest in higher quantities.  \n\nThe crab eats the algae (which has lead in it) this gives an increase in lead in the crab, as the crab eats more algae the amount of lead in the crab increases.  Now, the crocodile eats the crab and gets all the lead that was in the crab (an increased amount because of the lead in the crab from the algae it was eating).  If the crocodile eats more crabs its levels of Lead go up again.  Now if a man eats that crocodile its lead levels will be the highest, and so man will ingest the most lead because of a build up of lead through the system.
574192
Phosphates enter waterways from different souces. Manufacturing and household detergents used to be major contributors but I think alot of that problem has been solved in the US since phosphates in most laundry products were outlawed many years ago. The phosphates would run off into streams and lakes and cause the plantlife to grow like crazy which would deplete the oxygen in the water resulting in fish kills. Over fertilizing lawns and improper working septic systems can also have the same effect.
1057715
Juvenile or adult blue crabs can tolerate a wide range of salinities and water temperatures in contrast to the zoeae and megalopae. Juveniles and adults are exposed to a salinity range of 0 to 35 ppt.
1107933
sand, it can be pretty gross if the beach is not cleaned up
789100
The honest and scientific answer to this is that it would depend on the type of carcinogen that was present in the water what type of cancer they might get.
527030
The ocean water can get too hot and kill the animals that live in it because deadly algae and other things grow and kill dolphins and whales etc. Then fish will die and the food chain can go off wack and everything can get messed up and hurt the  animals.
659986
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.
1020525
Salinity will decrease a bit, but it won't be very significant.  \n\nLower salinity fish might move out of their environments and colonize other parts of the oceans.
191847
The oceans are in relative equilibrium.  They aren't getting saltier.  There are several salt "sinks" which take the accumulated salt and remove it from the ocean.\n\nThe following is an excerpt from this Web reference on the subject:\n\nb. Sinks (removal processes) of ocean salinity include salt spray which is blown over land; at oceanic ridges magnesium and sulfate ions are incorporated into mineral deposits; calcium, sulfate, and sodium are deposited as biogenous sediments in animal shells and fecal pellets; most importantly, almost all ions can be absorbed to the surface of sinking clay and biological particles.\nhttp://www-ocean.tamu.edu/~duce/chapter07.html\n\nDoing a Yahoo Search for:\nocean salinity salt removal\nhttp://search.yahoo.com/search?p=ocean+salinity+salt+removal&ei=UTF-8&fr=slv1-&x=wrt\n\nyou can find a number of related articles that talk about what happens to the salt.\nhttp://www.palomar.edu/oceanography/salty_ocean.htm\nhttp://www.geo.arizona.edu/geo2xx/geo212_2/Lectures/OC05.SaltGas.pdf#search='ocean%20salinity%20salt%20removal'\nhttp://www.oceansonline.com/salts.htm