1、洄游是一种现象，鱼类正是凭借这种活动满足它在某个生活时期需要的外部条件，使它的种群繁衍得到可靠的保证。
2、夏季雨后水库里的鲤鱼会溯流到上游进水口附近觅食；
3、Fishindifferentseasonshavedifferentrangeofactivitiesduringthedayitisfromavenuechangein,thereisfoodandwatertemperaturechangeeffects,andhumaninterferencealsonotsallowtoignore,becausesomepeoplewaterstravelmorethanangler,inthis,fishenvironmenttosurvive,resistancetostrengthen.Fishinginstinct
4、Conversely,watertemperaturetoolow,fishandshoot,itwillalsofunctionslowtemperature,whenropriate,refusfeedssufficientoxygen,especiallyinthesummeraftertherain,thefishwillquirks,foragingproactive,bitingratedoubled,whensomeplaceshavefood,fishwillthroughthespecialwaytopassinformation,interoperability,andjumpinfood,waterreservoirwaterleveldropsrapidlyoncethe,thefishwillshowveryfrightened,hidingindeepwaterseldomeat,thesearealsofishhabitcharacteristics.
5、仲秋以后鱼又从浅水来到深水越冬。
6、鱼在水下四处游动，其主要目的就是觅食，因为这是它们赖以生存的唯一手段，鱼又是变温动物，它的体温随着水温变化而变化，所以说不同季节的水温变化都很大程度上限制了鱼的活动范围。
7、同时也变得异常警觉。
8、Afterhalfpastautumnfromshallowtodeepfishandwinter.
9、Thesephenomenaareinfishmigratoryhabitswithincategory.
10、Fishinunderwaterroam,itsmainpurposeisforaging,becausethisistheonlywaytheycansurvive,fishisvariabletemperatureanimals,itstemperaturechangeswithtemperature,sothewatertemperaturechangesindifferentseasonsarelargelylimitsthefish'sactivities.
11、鱼在觅食时受天气影响也是比较大，天气闷热、气压低，鱼就会出现厌食现象，较大的鱼就会躲在水里不吃不动；
12、总之，鱼类在生命活动中有一种同期性、定向性和群体性的迁徙活动习性，我们把这种现象称之为洄游。
13、鱼的洄游主要有四种：生殖洄游、索饵洄游、趋暖洄游、越冬洄游。
14、Thesummeraftertherainwatergaragecarpwillupriverstoupstreamnearforaginginlet;
15、Migrationisonekindofphenomenon,fishispreciselyreliesonthiskindofactivityinsomelifeperiodtomeetitsneedsexternalconditions,makeitspopulationmultiplygetreliableguarantee.
16、havegreatdependenceonfish.AndfishisthemainfoodforJapanese.
17、反之，水温过低，鱼的代射功能减缓，它也会拒食，当水温适宜、溶氧充足，特别是夏季雨后，鱼儿就会活动异常，觅食积极主动，咬钩率成倍提高，当有的地方有食物时，鱼儿就会通过特有的方式互传信息，趋之若骛前去觅食，而水库一旦放水，水位迅速下降，鱼儿就会表现的惊恐不已，躲在较深的水里很少进食，这些也是鱼的习性特点。
18、Anyhow,fishinlifeactivitieshaveaTongQiXing,directionalsexmigratoryactivitiesandcollectivebehavior,weputthisphenomenoncalledmigration.
19、Actually,Iamveryfondofgoldenfishbecauseitissobeautifulandusuallyusedasadecoration.Ina,fishisveryimportanttohumanbeings.
20、Fishwhentheforagingprotectedfromtheweatherisbigger,thehumidweather,lowairpressure,fishwillearanorexiaphenomenon,biggerfishwouldhideinthewaterdon'teatnottomove;
21、鱼在不同季节有不同的活动范围，就是在一天里它有活动地点也在不时变更，这里面有食物、水温变化带来的影响，同时人为干扰也不容忽视，因为有些人水域钓鱼人多、旅游的人也多，鱼在此环境生存，抗钓本能增强。
22、我们在钓鱼中经常发现，春天鲤鱼、鲫鱼、鲇鱼等鱼种从深水来到浅水交尾；
23、shark 读音：英[ʃɑːk]美[ʃɑːrk] n.鲨鱼n.贪婪的人；放的人；老手v.诈取；Thesharksneditsjawsshut.鲨鱼啪嗒一声把嘴合上了。
24、Alsobecomeextremelywary.
25、TherearefourmainmigratoryfishmigrationandSuoErHuiYou:reproductioniswarm,migrationandwinteringmigration.
26、Generallyspeaking,fishisakindofspecieswhichusuallylivesinthewater.Therearevariouskindsoffishintheworld.Someareverycommonwhileothersareveryprecious.Infact,fishhasmanyfunctionsandisofvitaltopeople'slife.SomecountrieslikeJapan
27、tuna 读音：英['tjuːnə]美['tuːnə] n.金枪鱼n.霸王树Iliketoeattinnedtunafish.我喜欢吃金枪鱼罐头。
28、以上这些现象都在鱼的洄游习性范畴之内。
29、Weoftenfoundinfishing,springcarp,carp,catfishspeciessuchasJiaoWeifromdeep-watercametoshallowwater;
30、carp 5、salmon 读音：英['sæmən]美['sæmən] n.鲑；大马哈鱼；橙红色的HeplanedtogofishingforsalmononSunday.他计划星期天去钓鲑鱼。
