DIY News writes "Scientists now have direct evidence that the north Pacific salmon shark maintains its red muscle at 68-86 degrees Fahrenheit, much warmer than the 47 F water in which it lives. The elevated muscle temperature presumably helps the salmon shark survive the cold waters of the north Pacific and take advantage of the abundant food supply there. The heat also appears to factor into the fish's impressive swimming ability."Ads_xl=0;Ads_yl=0;Ads_xp='';Ads_yp='';Ads_xp1='';Ads_yp1='';Ads_par='';Ads_cnturl='';Ads_prf='page=article';Ads_channels='RON_P6_IMU';Ads_wrd='ed,science';Ads_kid=0;Ads_bid=0;Ads_sec=0; Warm-blooded Fish? Log in/Create an Account | Top | 309 comments | Search Discussion Display Options Threshold: -1: 309 comments 0: 288 comments 1: 224 comments 2: 150 comments 3: 40 comments 4: 21 comments 5: 17 comments Flat Nested No Comments Threaded Oldest First Newest First Highest Scores First Oldest First (Ignore Threads) Newest First (Ignore Threads) The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way. I knew it! (Score:4, Funny) by Greyfox (87712) on Monday October 31, @10:10AM (#13915036) (http://www.flying-rhenquest.net/) Damn reptiles... always trying to copy us!The next round of global warming is going to see warm blooded land-dinosaurs roaming the tropical forests of the North American continent. We'll all be sorry then! [ Reply to This Re:I knew it! (Score:5, Insightful) by Omega Leader-(P12) (240225) on Monday October 31, @10:18AM (#13915098) Fish != Reptiles; Fish = Fish [ Reply to This | ParentRe:I knew it! by VikingBerserker (Score:1) Monday October 31, @11:24AMRe:I knew it! by smooth wombat (Score:2) Monday October 31, @11:33AMRe:I knew it! by BKX (Score:2) Monday October 31, @02:56PM Sharks are not invertabrates. by falconwolf (Score:2) Monday October 31, @07:27PM1 reply beneath your current threshold.Re:I knew it! by mcheu (Score:1) Monday October 31, @11:27AMRe:I knew it! by monkeydo (Score:2) Monday October 31, @11:34AMSyntax Nazi by Celsius 233 (Score:1) Monday October 31, @12:02PMRe:Syntax Nazi by zippthorne (Score:2) Monday October 31, @12:24PMRe:Syntax Nazi by Senjutsu (Score:2) Monday October 31, @03:14PMRe:Syntax Nazi by Tower (Score:1) Monday October 31, @06:11PMRe:I knew it! by Stephan Schulz (Score:2) Monday October 31, @12:25PMFish != fish !? by Shark (Score:3) Monday October 31, @01:18PMRe:Fish != fish !? by shawb (Score:2) Monday October 31, @07:00PMRe:Fish != fish !? by nwbvt (Score:2) Monday October 31, @07:09PM Fish != Reptiles; Fish = Fish by falconwolf (Score:2) Monday October 31, @07:00PM7 replies beneath your current threshold. Re:I knew it! (Score:4, Informative) by caddisfly (722422) on Monday October 31, @10:24AM (#13915143) "Damn reptiles... always trying to copy us!" ...and this is why we need to continue to teach *science* in science class 'cause last time I checked, salmon sharks were not reptiles.These findings just confirm the "above ambient temp" findings that have been known for quite a while with bluefin tuna, other big sharks, etc. ...the evolutionary implications are that these "heater" systems allowed these predators to extend their hunting range and hunting efficiency by moving into and operating in colder waters and thus increasing the amount of food available to them --- presto, evolutionary success! ...that was until the commercial fishing and technology came along to start wiping them out [ Reply to This | Parent Re:I knew it! (Score:4, Funny) by KrancHammer (416371) <GunseMatt.hotmail@com> on Monday October 31, @10:41AM (#13915289) Along the discovery that salmon shark thermoregulate (duh), a more interesting discovery is the that of the fundamental division of Slashdot posters. No, not liberals and conservatives, not pro-Firefly and anti-Firefly, not religious and non-religious... no, the fundamental division are those with senses of humor and the psychological capability for detecting the same, and those without. [ Reply to This | ParentRe:I knew it! by Taladar (Score:3) Monday October 31, @12:52PM1 reply beneath your current threshold.Re:I knew it! by EntropyEngine (Score:1) Monday October 31, @12:23PMRe:I knew it! by kevlar (Score:2) Monday October 31, @01:06PMRe:I knew it! by Idealius (Score:2) Monday October 31, @03:42PM Unless you live in China. :) by falconwolf (Score:2) Monday October 31, @09:16PMRe:I knew it! by TheGavster (Score:3) Monday October 31, @01:17PMRe:I knew it! by 99BottlesOfBeerInMyF (Score:3) Monday October 31, @03:21PMRe:I knew it! by The employee can cho (Score:1) Monday October 31, @02:08PMRe:I knew it! by einhverfr (Score:2) Monday October 31, @02:13PMRe:I knew it! by sillybilly (Score:3) Monday October 31, @04:05PMRe:I knew it! by shawb (Score:2) Monday October 31, @07:11PMevolutionary shark success! by falconwolf (Score:2) Monday October 31, @09:13PM1 reply beneath your current threshold.It's not a reptile. by dangerweasel (Score:2) Monday October 31, @10:40AMRe:I knew it! by RembrandtX (Score:1) Monday October 31, @11:11AMRe:I knew it! by vliktor (Score:1) Monday October 31, @02:55PM3 replies beneath your current threshold. Big Question... (Score:3, Funny) by Ritz_Just_Ritz (883997) on Monday October 31, @10:14AM (#13915062) How to convince my mother-in-law to stop swimming. 8-) [ Reply to This Re:Big Question... (Score:5, Funny) by LegendOfLink (574790) on Monday October 31, @10:25AM (#13915161) (http://www.intergalacticbasement.com/) That's why we have harpooons. [ Reply to This | ParentRe:Big Question... by thePowerOfGrayskull (Score:1) Monday October 31, @11:23AM2 replies beneath your current threshold. "maintains its red muscle"... (Score:5, Funny) by PurplePhase (240281) on Monday October 31, @10:16AM (#13915083) Is that what the kids are calling it these days?8-PP [ Reply to This Other warm-blooded "cold-blooded" creatures (Score:5, Interesting) by G4from128k (686170) on Monday October 31, @10:20AM (#13915108) Many insects also create intentionally elevated body temperatures (generally through shivering). Moths, bees, dung beetles all generate heat to enable greater activity under cold conditions.For example. Honeybees generate heat in the winter to keep the hive warm and use heat to kill predatory wasps [sciencenews.org] -- surrounding the wasp, heating up to 45 C (113 F) and killing the attacker. [ Reply to ThisRe:Other warm-blooded "cold-blooded" creatures by Rinnt (Score:1) Monday October 31, @10:28AMRe:Other warm-blooded "cold-blooded" creatures by JasonKChapman (Score:3) Monday October 31, @11:03AMRe:Other warm-blooded "cold-blooded" creatures by DrSkwid (Score:2) Monday October 31, @11:38AMRe:Other warm-blooded "cold-blooded" creatures by loserface (Score:1) Monday October 31, @11:55AMRe:Other warm-blooded "cold-blooded" creatures by Cerberus7 (Score:2) Monday October 31, @12:45PMRe:Other warm-blooded "cold-blooded" creatures by braddk (Score:1) Monday October 31, @01:11PMRe:Other warm-blooded "cold-blooded" creatures by shawb (Score:2) Monday October 31, @07:27PMRe:Other warm-blooded "cold-blooded" creatures by testpoint (Score:1) Monday October 31, @09:05PMRe:Other warm-blooded "cold-blooded" creatures by shawb (Score:2) Monday October 31, @09:53PMRe:Other warm-blooded "cold-blooded" creatures by dogbane (Score:1) Monday October 31, @03:11PMRe:Other warm-blooded "cold-blooded" creatures by shawb (Score:2) Monday October 31, @07:32PMRe:Other warm-blooded "cold-blooded" creatures by johansalk (Score:2) Monday October 31, @04:40PMRe:Other warm-blooded "cold-blooded" creatures by krunk4ever (Score:2) Monday October 31, @05:32PM Vehicle knowledge and more. (Score:5, Insightful) by Karma_fucker_sucker (898393) on Monday October 31, @10:22AM (#13915129) "Knowing specific details about the anatomy and physiology of salmon sharks provides key insight into their ability to produce such power and speed during swimming. The knowledge could translate into better designs for underwater vehicles." There's so much to learn from our oceans and yet they're disappearing fast because of the need for food and for some really stupid/ignorant [oceansonline.com] reasons. It would be great if more folks would see this as more reasons for onservation and the repeal of the "tragedy of the commons"... I know, in my fucking dreams. [ Reply to ThisRe:Vehicle knowledge and more. by bgarcia (Score:1) Monday October 31, @11:08AMInsightful, NOT Troll!!!!! by Karma_fucker_sucker (Score:2) Monday October 31, @04:13PMoceans by falconwolf (Score:2) Monday October 31, @10:07PMRe:Vehicle knowledge ... You an environmentalist? by fygment (Score:2) Monday October 31, @12:07PMRe:"disappearing fast"?? by Karma_fucker_sucker (Score:1) Monday October 31, @04:15PM4 replies beneath your current threshold. But... (Score:3, Funny) by sznupi (719324) on Monday October 31, @10:23AM (#13915133) What advantege does it give for lasers? [ Reply to ThisObvious ... by Anonymous Coward (Score:1) Monday October 31, @10:47AM Not surprising, and not really "warm-blooded" (Score:5, Interesting) by dpbsmith (263124) on Monday October 31, @10:29AM (#13915191) (http://world.std.com/~dpbsmith) The distinction is not between "cold-blooded" and "warm-blooded" animals but between poikilotherms, whose body temperature is the same as that of the environment, and homeotherms, whose body temperature is closely regulated and held within a normal range of a couple of degrees or lessOn the one hand, practically every poikilotherm that's been studied actually thermoregulates in some ways. Very few of them truly assume the temperature of their environment.On the other hand, "maintaining" temperature at "68-86 degrees Fahrenheit" -- 77 degrees plus or minus 9--is far from comparable to the degree of thermoregulation shown by mammals. Nine degrees too high or too low is enough to kill you, and most mammals.It's interesting to learn how another kind of poikilotherm performs a crude kind of thermoregulation, but by no means earthshaking. [ Reply to ThisMy thoughts exactly by PIPBoy3000 (Score:2) Monday October 31, @10:41AM1 reply beneath your current threshold.Re:Not surprising, and not really "warm-blooded" by bcrowell (Score:1) Monday October 31, @06:14PMRe:Not surprising, and not really "warm-blooded" by krayzkrok (Score:2) Monday October 31, @06:24PM I thought there were a bunch (Score:5, Interesting) by Nf1nk (443791) <.moc.oohay. .ta. .kn1fn.> on Monday October 31, @10:30AM (#13915197) (http://slashdot.org/) As a long time deep sea fisherman I thought there were a bunch of fish who lived with an elivated core temperature. Many of the red meat fast swimming open ocean fish (such as tuna, dorado, baracuda, swordfish) are decidely warm when you pull them in and have a radicaly different muscle structure than what you see with slow moving cold fish. Also the tend to have many fewer visable internal parasites, which I always associated with having a much different metablism. [ Reply to ThisRe:I thought there were a bunch by hador_nyc (Score:2) Monday October 31, @11:11AMThat's right...it's not exactly a new discovery. by Timothy Chu (Score:2) Monday October 31, @09:25PM Re:I thought there were a bunch (Score:5, Insightful) by ultramk (470198) <ultramk@pacbell. ... minus physicist> on Monday October 31, @11:38AM (#13915751) You're right, as far as tuna-family fish go at least.It's been well-studied that some of the larger species of tuna direct blood that's been heated by the action of their largest swimming muscles to their brain... which helps keep their super-fast twitch-reactions humming. Swordfish use the warm blood to improve their eyesight.Mind you, these are some enormous fish. [mbayaq.org]m- [ Reply to This | ParentRe:I thought there were a bunch by daddymac (Score:1) Monday October 31, @02:21PM20 C ! = 68 F by Timothy Chu (Score:2) Monday October 31, @09:37PMRe:I thought there were a bunch by Zoinks (Score:2) Monday October 31, @02:15PMOther examples include the related White Shark by ianscot (Score:2) Monday October 31, @03:32PMWhite Shark and "Jaws" by falconwolf (Score:2) Monday October 31, @10:32PM1 reply beneath your current threshold. Fat (Score:1) by Detritus (11846) on Monday October 31, @10:32AM (#13915213) (http://slashdot.org/) Do any fish have an insulating layer of fat, like many mammals? [ Reply to ThisRe:Fat by Anonymous Coward (Score:3) Monday October 31, @10:45AMRe:Fat by tpjunkie (Score:1) Monday October 31, @10:46AMRe:Fat by Macphisto (Score:1) Monday October 31, @05:38PM1 reply beneath your current threshold. Working muscles give off heat? (Score:4, Insightful) by magarity (164372) on Monday October 31, @10:39AM (#13915269) (Last Journal: Thursday October 14, @09:23AM) Since salmon's propulsion muscles are like heart muscles, they never get tired and are always working, doesn't it stand to reason that a muscle that's always working is always generating heat? Expending calories will always have some excess waste heat unless salmon have figured out how to have 100% efficient muscles. So then why is this a suprise? [ Reply to ThisRe:Working muscles give off heat? by WormholeFiend (Score:2) Monday October 31, @11:40AMRe:Working muscles give off heat? by magarity (Score:2) Monday October 31, @11:53AM1 reply beneath your current threshold.Re:Working muscles give off heat? by krautcanman (Score:3) Monday October 31, @01:21PMbecause they hold onto it by Quadraginta (Score:2) Monday October 31, @04:42PM Disadvantage too? (Score:1, Interesting) by Anonymous Coward on Monday October 31, @10:39AM (#13915274) Wouldn't this also make it easier for predators to find them? How sensitive are marine predators to heat? [ Reply to ThisRe:Disadvantage too? by Jerry Coffin (Score:2) Monday October 31, @01:37PMRe:Disadvantage too? by Down8 (Score:2) Monday October 31, @01:46PMRe:Disadvantage too? by dunc78 (Score:1) Monday October 31, @02:42PM2 replies beneath your current threshold. Rattlesnakes also warm blooded (Score:2, Interesting) by Gothmolly (148874) on Monday October 31, @11:11AM (#13915524) Or at least, can CHOOSE to be. Female rattlers incubating eggs will wrap themselves around the eggs, and 'shiver', to elevate their body temperature to keep the eggs warm. [ Reply to ThisRe:Rattlesnakes also warm blooded by johnty (Score:1) Monday October 31, @11:20AMRe:Rattlesnakes also warm blooded by spongebobsquarepants (Score:2) Monday October 31, @12:55PMRe:Rattlesnakes also warm blooded by Ksisanth (Score:2) Monday October 31, @02:42PM Just in case... (Score:1) by B11 (894359) on Monday October 31, @11:19AM (#13915592) Maybe we shouldn't be so quick to destroy the robots [slashdot.org]. THe could prove useful against these highly evolved sharks. [ Reply to This Metric system? (Score:5, Insightful) by kjetiln (729530) on Monday October 31, @11:33AM (#13915714) Could you not use metric temperatures? Celcius is the norm for science. (Kelvin when it is about physics.) [ Reply to ThisRe:Metric system? by Celsius 233 (Score:1) Monday October 31, @12:07PMpress release... by drewxhawaii (Score:1) Monday October 31, @02:54PMRe:press release... by Da3vid (Score:1) Monday October 31, @03:13PMyou can see the conversions by Quadraginta (Score:2) Monday October 31, @04:58PMRe:you can see the conversions by alannon (Score:2) Monday October 31, @07:57PMRe:you can see the conversions by Lilkeeney (Score:1) Monday October 31, @08:34PMnope! by Quadraginta (Score:2) Monday October 31, @09:04PMit's an intellectual continuum of use by circletimessquare (Score:1) Monday October 31, @04:29PM2 replies beneath your current threshold. tuna also (Score:3, Informative) by YesIAmAScript (886271) on Monday October 31, @11:44AM (#13915813) http://en.wikipedia.org/wiki/Tuna [wikipedia.org]Wow, not sure why it is news that some fish are warm-blooded.The warm-bloodedness of tuna also makes allows them to be very good swimmers even in cold water. [ Reply to ThisRe:tuna also by Down8 (Score:2) Monday October 31, @01:39PMRe:tuna also by narcc (Score:2) Monday October 31, @02:59PMRe:tuna also by Down8 (Score:2) Monday October 31, @05:40PMwow, someone needs to work on their units by YesIAmAScript (Score:2) Monday October 31, @09:32PM More to being a mammal than warm blooded bodies (Score:1) by madshot (621087) on Monday October 31, @12:04PM (#13916050) (http://www.linuxonly.net/ | Last Journal: Friday October 14, @01:34PM) Correct me if I'm wrong (which I'm sure /.'ers will do). To be a mammal you need a few key things1) Live birth (not eggs)2) Fur or Hair (not scales)3) Warm bloodedI'm sure some vet major can list the rest but lets look at it this way.If I'm cold blooded and I move my muscles like a mad man (err. fish) I use energy. Energy = Heat no? and friction creates heat.Does that mean if this fish stops moving he gets cold again because the movement of his body creates the heat? I know when I lay down I stay warm (as long as I'm not laying in the snow).I think this is just a bunch of fish rubbish. Eat more chicken! [ Reply to ThisRe:More to being a mammal than warm blooded bodies by dantal (Score:2) Monday October 31, @12:29PMMammaries vs. tits by Nicolas MONNET (Score:2) Monday October 31, @01:20PMRe:More to being a mammal than warm blooded bodies by Llywelyn (Score:2) Monday October 31, @02:48PM1 reply beneath your current threshold. nothing new... (Score:2) by grumpyman (849537) on Monday October 31, @12:29PM (#13916260) I thought all fishes are warm-blooded, once they're on the frying-pan. However, it could be fairly dark and solidified if it's fish-n-chips. [ Reply to This Sharks are not fish (Score:1) by kallex (545693) on Monday October 31, @12:38PM (#13916352) A fish has bones but a shark has only cartilege. A shark is a totally different species, a very ancient one. [ Reply to ThisRe:Sharks are not fish by spongebobsquarepants (Score:2) Monday October 31, @12:50PM ID vs Evolution (Score:2, Insightful) by wpeckham (710201) <mrwbp AT hotpop DOT com> on Monday October 31, @01:03PM (#13916546) (http://www.geocities.com/mrwbp_1/) Darned if I see any validity in the way ID and Evolution got into this discussion, but I must comment: Evolution is two things: a theory, and a principal. Both are scientific terms, and have validity only as long as evidence supports them. They describe things known to be true, because Observations from around the world and under different environments support both. Should new observations conflict with some part of either, then our description of them will be modified to fit the new information. This is how science advances. ID is not a theory, it is an idea based upon a belief. It has no observational support. This does not make it false, simply not verifiable and not science. I am a Christian. Not only Christian, but also Catholic. I am also a Physicist and Mathematician. You should not be required to be any of these to understand the difference between Science and Faith. Now, to dive deep into my own meditations: If you want, you may consider ID an article of faith. If you have faith, Science should not be any challenge. You should also be secure that whatever men decide about God, he (or she) will remain unchanged and immune to our manipulations! If one view: Faith is what you believe God did, Science is our attempt to understand HOW! These do not conflict, and no one need study them together to benefit from either. Those who confuse this issue and generate needless conflict only display their lack of both faith and understanding. Mind you, I welcome anyone who wants to disagree with these thoughts. Those who offer scientific evidence may help me modify my understanding of science. With or without evidence, none will be successful in prompting any change in my faith. My children go to a church school. Anyone who suggests having them taught ID or Creationism in Science would meet with my strongest objections because these are NOT science. I would not react quite so strongly to an attempt to teach them the Theory of Evolution if Theology class, because it just MAY demonstrate a tool of Gods will! Please consider, and be kind to each other. [ Reply to ThisRe:ID vs Evolution by jzeejunk (Score:2) Monday October 31, @02:23PMRe:ID vs Evolution by wcrowe (Score:2) Monday October 31, @03:19PM2 replies beneath your current threshold. Fahrenheit?!? (Score:2) by meehawl (73285) <meehawl,spam&gmail,com> on Monday October 31, @01:48PM (#13916911) (http://www.meehawl.com/Blogfiles/ | Last Journal: Thursday December 04, @06:38PM) You've just got to laugh at "scientific" publications that print their data in Fahrenheit.How many roods to the hogshead is that anyway? [ Reply to Thispress release... by drewxhawaii (Score:1) Monday October 31, @02:52PMRe:Fahrenheit?!? by Anonymous Coward (Score:1) Monday October 31, @04:04PMCowardly Assholes by meehawl (Score:2) Monday October 31, @05:56PMAnd so? by /dev/trash (Score:2) Monday October 31, @07:06PM But... (Score:1, Interesting) by dbilbey (452244) on Monday October 31, @01:55PM (#13916958) Does it run Linux? [ Reply to This Warm-blooded fish (Score:1) by johnnyp (17487) on Monday October 31, @02:03PM (#13917026) (http://www.dvc.org.uk/~johnny/)