絢麗多彩的海洋生物-水母

12082簇jellyfish身體構(gòu)造

水母的身體有95%以上是水份，其它包括3-4%鹽類及1-2%蛋白質(zhì)，沒有心臟、腦、骨頭或眼睛。水母體可區(qū)分三個(gè)主要部份：一是圓圓的傘體，水母通過收縮傘體擠壓內(nèi)腔的方式，進(jìn)行移動(dòng)。傘體中分布的白色線條是水管腔，用來運(yùn)送養(yǎng)份及廢物的。水母也可以藉由其體表進(jìn)行呼吸作用；二是觸手，可通過彎曲控制運(yùn)動(dòng)方向，水母觸手中間的細(xì)柄上有一個(gè)小球，里面有一粒聽石，這是水母的“耳朵”，含有大量神經(jīng)細(xì)胞用于感知環(huán)境的變化。；三是口腕，吃食獵物，還可用于排精排卵。

Thejellyfishbodyismorethan95%water,theotherincluding3-4%saltand1-2%protein,noheart,brain,boneoreyes.Medusacandistinguishbetweenthreemainparts:oneistheroundcanopy,jellyfishbycontractingtheumbrellabodyextrusionchamber,andmove.Canopyinthedistributionofthewhitelineisthepipecavityandusedtotransportnutrientsandwaste.Jellyfish,alsocanundertakerespirationbyitssurface;Second,tentacles,canbecontrolledbybendingdirection,jellyfishtentaclesinthemiddleofthefineonthehandlewithaball,thereisagrainofstone,thisisthe"ears"jellyfish,containsalotofnervecellstoperceivechangesintheenvironment.;thirdisoralarm,feedingprey,canalsobeusedforfineovulation.發(fā)光原因

水母的發(fā)光源與其它動(dòng)物是不同的，其它動(dòng)物大多是熒光素、熒光酶經(jīng)過氧的催化作用，因而發(fā)光?？墒撬赴l(fā)光靠的卻是一種叫?？值纳衿娴牡鞍踪|(zhì)，這種蛋白質(zhì)遇到鈣離子或銀離子就能發(fā)出較強(qiáng)的藍(lán)色，不受酶抑制劑或其他因素的影響。

Jellyfishlightsourceisdifferentfromotheranimals,animalsaremostlyfluorescein,enzymefluorescentafteroxygencatalyst,andshine.ButjellyfishglowdependsonakindofmagicalproteincalledMrQuinoline,thisproteinorsilverwithcalciumionscanemitstrongblue,notaffectedbyenzymeinhibitorsorotherfactors.天敵

Stronganddeadlyjellyfish,thelargestnaturalenemiesisaturtle,otherthanfortheseaanemone,seaweed,conch,seacucumber,leatherbackturtlescanfreeshuttleinthegroupofjellyfish,easilybrokethemoffcontactwiththemouth,makeitscanrollupanddown,finallylosingtheabilitytoresist.

威猛而致命的水母最大的天敵是海龜，其它多為?？?，海草，海螺，海參，棱皮龜可以在水母的群體中自由穿梭，輕而易舉地用嘴扯斷它們的觸頓，使其只能上下翻滾，最后失去抵抗能力。捕食

Jellyfishfood,mainlydiatoms,protozoa,crustaceans,polychaeteslarva,shellfishlarvae,shellfish,eggs,fishandshrimpandsmallcrustaceans,linecaterpillarandshellfishlarvaemainlydependsonthetype.Freshwaterjellyfish