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| 本文就汞、锌、铅3种重金属对黑鲷胚胎(包括前期仔鱼)发育的影响进行了研究和讨论,并与铜对黑鲷胚胎发育的影响作了比较。黑鲷卵和前期仔鱼对上述4种重金属的敏感顺序是:汞〉铜〉锌〉铅。初孵仔鱼对汞及胚孔封闭前的发育卵对铜较其它发育阶段更为敏感。初孵仔鱼和脊椎形成前的卵对锌、铅都比较敏感,但大大低于对铜和汞的敏感程度。值得注意的是:在脊椎形成后至孵化前的胚胎发育期间,卵对4种重金属的敏感性都远较胚胎发育的其它阶段低。汞、铅对黑鲷的胚胎发育有较明显的迟滞效应。高浓度的锌和铅引起大量初孵仔鱼的畸变,而在含汞海水中,在 |
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| EFFECTS OF Hg, Zn, Pb on EMBRYONIC DEVELOPMENT OF BLACK PROGY,SPARUS MACROCEPHALUS BASILEWSKY |
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| Abstract: |
| This paper discussed effects of Hg(Ⅱ), Zn(Ⅱ), Pb(Ⅱ) as well as that of Cu(Ⅱ) on embryonic development of black progy, including earlier stage larvae. The sequential sensitivity of the four rheavy metals is Hg > Cu > Zn>Pb. Mercury sensitivity of larvae just hatched and copper sensitivity of eggs beffore closure of the blastopore is higher than other development stages. Zinc and lead sensitivity are also higher during the two stages, but much lower than copper and mercury. All of the four heavy metals sensitivity of eggs from closure of the blastopore to hatching is lower than other development stages. Mercury and lead obviously retarded embryonic development. High concentration Zn(Ⅱ) and Pb(Ⅱ) caused skeleton malformation of lots of larvae which had just hatched, but Hg(Ⅱ) produced no malformation during all embryonic and earlier stage larvae development. |
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