白(bai)(bai)(bai)(bai)(bai)(bai)金(jin)(jin)(jin)(jin)龍(long)(long)(long)(long)魚(yu)(yu)(yu)(yu)又(you)稱白(bai)(bai)(bai)(bai)(bai)(bai)龍(long)(long)(long)(long),是(shi)一(yi)種(zhong)較(jiao)為(wei)特殊的(de)(de)(de)個體(ti)(ti),有(you)人說白(bai)(bai)(bai)(bai)(bai)(bai)金(jin)(jin)(jin)(jin)龍(long)(long)(long)(long)魚(yu)(yu)(yu)(yu)其實就是(shi)雪龍(long)(long)(long)(long),全身(shen)雪白(bai)(bai)(bai)(bai)(bai)(bai)有(you)質感,身(shen)上沒有(you)其他(ta)一(yi)點雜(za)質,眼睛為(wei)紅(hong)色(se)(se),非常優(you)雅(ya)。還有(you)一(yi)個說法就是(shi)體(ti)(ti)色(se)(se)偏白(bai)(bai)(bai)(bai)(bai)(bai)色(se)(se)或(huo)者銀(yin)色(se)(se)泛光的(de)(de)(de)金(jin)(jin)(jin)(jin)龍(long)(long)(long)(long)魚(yu)(yu)(yu)(yu),就是(shi)白(bai)(bai)(bai)(bai)(bai)(bai)金(jin)(jin)(jin)(jin)龍(long)(long)(long)(long)魚(yu)(yu)(yu)(yu)。沒有(you)一(yi)個統一(yi)的(de)(de)(de)說法。白(bai)(bai)(bai)(bai)(bai)(bai)金(jin)(jin)(jin)(jin)龍(long)(long)(long)(long)魚(yu)(yu)(yu)(yu)的(de)(de)(de)由(you)來,一(yi)直(zhi)是(shi)一(yi)個秘密(mi),現在市面(mian)上的(de)(de)(de)種(zhong)類也(ye)有(you)了些許變(bian)化,不(bu)是(shi)之前(qian)單一(yi)的(de)(de)(de)通體(ti)(ti)白(bai)(bai)(bai)(bai)(bai)(bai)色(se)(se)或(huo)銀(yin)色(se)(se)的(de)(de)(de),由(you)青龍(long)(long)(long)(long)魚(yu)(yu)(yu)(yu)、過背金(jin)(jin)(jin)(jin)龍(long)(long)(long)(long)魚(yu)(yu)(yu)(yu)演變(bian)的(de)(de)(de)白(bai)(bai)(bai)(bai)(bai)(bai)金(jin)(jin)(jin)(jin)龍(long)(long)(long)(long)魚(yu)(yu)(yu)(yu)的(de)(de)(de)鰭都為(wei)白(bai)(bai)(bai)(bai)(bai)(bai)色(se)(se)或(huo)黃色(se)(se),由(you)超級(ji)紅(hong)龍(long)(long)(long)(long)魚(yu)(yu)(yu)(yu)而來的(de)(de)(de)白(bai)(bai)(bai)(bai)(bai)(bai)金(jin)(jin)(jin)(jin)龍(long)(long)(long)(long)魚(yu)(yu)(yu)(yu)的(de)(de)(de)鰭是(shi)有(you)點紅(hong)色(se)(se)的(de)(de)(de)。
白(bai)(bai)金龍魚(yu)又稱(cheng)“白(bai)(bai)龍”,是(shi)(shi)一種(zhong)(zhong)較為(wei)獨特的(de)(de)白(bai)(bai)色(se)個體類(lei)型(xing)。身上也(ye)有其它顏色(se),所以只能算(suan)白(bai)(bai)色(se)動物而不(bu)是(shi)(shi)白(bai)(bai)化動物。如(ru)果不(bu)是(shi)(shi)很(hen)(hen)較真的(de)(de)話(hua),這(zhe)種(zhong)(zhong)白(bai)(bai)色(se)生(sheng)物由于不(bu)同于物種(zhong)(zhong)應有的(de)(de)顏色(se),稱(cheng)之為(wei)白(bai)(bai)化也(ye)不(bu)是(shi)(shi)不(bu)可以,我們看到(dao)的(de)(de)很(hen)(hen)多白(bai)(bai)色(se)的(de)(de)龍魚(yu)就屬于此類(lei)。
白(bai)(bai)(bai)(bai)(bai)金(jin)龍(long)(long)(long)魚(yu)體色偏向白(bai)(bai)(bai)(bai)(bai)色或(huo)者銀(yin)色,并帶(dai)有(you)金(jin)屬光澤。據悉,以(yi)有(you)源自青龍(long)(long)(long)、超(chao)級紅(hong)(hong)龍(long)(long)(long)和(he)過(guo)背金(jin)龍(long)(long)(long)的白(bai)(bai)(bai)(bai)(bai)金(jin)龍(long)(long)(long)魚(yu)了。除了源自超(chao)級紅(hong)(hong)龍(long)(long)(long)的白(bai)(bai)(bai)(bai)(bai)金(jin)龍(long)(long)(long)的鰭帶(dai)有(you)部(bu)分紅(hong)(hong)色外,其他白(bai)(bai)(bai)(bai)(bai)金(jin)龍(long)(long)(long)魚(yu)的鰭皆為白(bai)(bai)(bai)(bai)(bai)色或(huo)黃色。此魚(yu)目前數量極少,故(gu)十分昂貴。
在(zai)白(bai)(bai)(bai)(bai)色(se)(se)(se)(se)動(dong)物(wu)(wu)中又(you)有一種(zhong)(zhong)體(ti)(ti)色(se)(se)(se)(se)純(chun)白(bai)(bai)(bai)(bai),眼(yan)(yan)(yan)睛(jing)發(fa)紅(hong)的(de)白(bai)(bai)(bai)(bai)化動(dong)物(wu)(wu),白(bai)(bai)(bai)(bai)化動(dong)物(wu)(wu)是一對(dui)隱性基因純(chun)合子的(de)產物(wu)(wu),基因影響動(dong)物(wu)(wu)體(ti)(ti)色(se)(se)(se)(se)的(de)途徑主要是控制酶的(de)活性,在(zai)白(bai)(bai)(bai)(bai)化動(dong)物(wu)(wu)體(ti)(ti)內由(you)于(yu)缺少一種(zhong)(zhong)酶,所以不能合成黑色(se)(se)(se)(se)素(su),無法掩蓋眼(yan)(yan)(yan)睛(jing)虹膜中的(de)血管顏色(se)(se)(se)(se),所以形成了身(shen)體(ti)(ti)白(bai)(bai)(bai)(bai)色(se)(se)(se)(se)、眼(yan)(yan)(yan)睛(jing)紅(hong)色(se)(se)(se)(se)的(de)白(bai)(bai)(bai)(bai)化現象(xiang)。白(bai)(bai)(bai)(bai)化動(dong)物(wu)(wu)往(wang)往(wang)還同時攜帶著對(dui)其自(zi)身(shen)不利(li)的(de)因素(su),如(ru)怕光、眼(yan)(yan)(yan)球震顫、皮癌等,另(ling)外在(zai)自(zi)然(ran)界(jie)中也容易為(wei)天敵(di)所發(fa)現而受到(dao)攻(gong)擊,所以比正(zheng)常個體(ti)(ti)難(nan)于(yu)存活。白(bai)(bai)(bai)(bai)化:(Albino)名詞(ci),白(bai)(bai)(bai)(bai)變種(zhong)(zhong),白(bai)(bai)(bai)(bai)化體(ti)(ti),任(ren)何缺乏正(zheng)常色(se)(se)(se)(se)素(su)的(de)動(dong)物(wu)(wu)或植物(wu)(wu)。觀賞魚領域稱(cheng)謂白(bai)(bai)(bai)(bai)子,魚體(ti)(ti)底色(se)(se)(se)(se)為(wei)透明狀的(de)雪白(bai)(bai)(bai)(bai)色(se)(se)(se)(se),全身(shen)不帶絲(si)毫黑色(se)(se)(se)(se)素(su),眼(yan)(yan)(yan)睛(jing)呈現紅(hong)色(se)(se)(se)(se)。通俗點說就是身(shen)體(ti)(ti)為(wei)白(bai)(bai)(bai)(bai)色(se)(se)(se)(se)或無色(se)(se)(se)(se),特(te)征(zheng)為(wei)-紅(hong)眼(yan)(yan)(yan)。
動(dong)物的(de)(de)體(ti)(ti)色大都和環境相近似(si),對(dui)于(yu)捕(bu)食(shi)者來說(shuo)是為了不被(bei)獵(lie)物輕(qing)易發現(xian),更容易捕(bu)食(shi)它們,對(dui)于(yu)被(bei)捕(bu)食(shi)者來說(shuo),這種體(ti)(ti)色也(ye)是為了隱蔽,以躲避被(bei)獵(lie)殺的(de)(de)危(wei)險(xian)。自(zi)然(ran)界的(de)(de)白(bai)色動(dong)物如北(bei)極熊(xiong)、白(bai)馬雞的(de)(de)體(ti)(ti)色正是和生境中的(de)(de)皚皚白(bai)雪(xue)相近。
產生(sheng)白化的基因(yin)(yin)不(bu)(bu)(bu)是(shi)(shi)一(yi)組(zu),有(you)很多,但不(bu)(bu)(bu)能(neng)否認的是(shi)(shi),不(bu)(bu)(bu)是(shi)(shi)所(suo)有(you)的生(sheng)物其隱形的白化基因(yin)(yin)都能(neng)組(zu)合,往往會片面一(yi)些(xie),但還有(you)一(yi)些(xie)白化的隱形基因(yin)(yin)由于組(zu)合顯現出來,還有(you)一(yi)種(zhong)因(yin)(yin)基因(yin)(yin)突變(bian)造成的白色動(dong)(dong)物,這種(zhong)動(dong)(dong)物的眼鏡(jing)不(bu)(bu)(bu)是(shi)(shi)紅色的,身上(shang)也(ye)有(you)其它顏色,所(suo)以只能(neng)算白色動(dong)(dong)物而不(bu)(bu)(bu)是(shi)(shi)白化動(dong)(dong)物。不(bu)(bu)(bu)過,在(zai)人工飼養的動(dong)(dong)物中,白化現象卻(que)很常(chang)見,如白兔、小(xiao)白鼠(shu)、大白鼠(shu)等,它們是(shi)(shi)在(zai)長期人工精心選育和保(bao)護下培育而成的,能(neng)夠正(zheng)常(chang)地繁衍后代。
1、白金龍魚(yu)通體白色,既然(ran)是白化體,那么眼(yan)睛為紅(hong)色,白金龍魚(yu)是紅(hong)龍的體形(xing),白金比銀龍要白,鱗質厚大(da),珍(zhen)貴(gui)純(chun)種(zhong)的白金龍魚(yu)市(shi)場(chang)上很少見。
2、銀(yin)龍(long)魚市場(chang)上比較(jiao)(jiao)常(chang)見(jian),銀(yin)帶擁有十分細長(chang)而側(ce)(ce)薄的(de)(de)體(ti)型(xing)。嘴巴的(de)(de)位置位于(yu)上方,口裂延(yan)伸至(zhi)眼窩后緣(yuan)。下(xia)噪聲較(jiao)(jiao)上顎更為突出,前(qian)方并排著(zhu)數個線狀的(de)(de)側(ce)(ce)線器官。吻端長(chang)有一對(dui)觸須,在(zai)自然環(huan)境中(zhong)迦游(you)的(de)(de)野(ye)生個體(ti),成魚的(de)(de)觸須可以(yi)伸長(chang)至(zhi)3-4cm,但在(zai)人工飼育下(xia)的(de)(de)個體(ti)由于(yu)生長(chang)受(shou)至(zhi)阻礙往往只(zhi)能長(chang)到1-2cm。