Effects of temperature on fertilization and early cleavage of some tropical echinoderms, with emphasis on Echinometra mathaei
Effects of temperature on fertilization and early cleavage of some tropical echinoderms, with emphasis on Echinometra mathaei
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温度对一些热带棘皮动物受精和早期卵裂的影响，重点是 Echinometra mathaei
DOI：
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发表时间：
1973
期刊：
影响因子：
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通讯作者：
J. Rupp
中科院分区：
文献类型：
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作者：
J. Rupp
在实验室中，选择高于正常温度的温度会降低棘皮动物的受精成功率和正常的早期卵裂，Culcita novaeguineae Muller and Troschel，Linckia laevigata（L.），Echinometra mathaei（de布兰维尔）和迪亚德马savignyi Michelin。这些数据表明，卵裂比受精对温度升高更敏感。大多数物种的早期卵裂耐受上限接近34.0°C。A. planci对温度的敏感性最高，E. mathaei，最不敏感的。进一步实验表明，E. mathaei的结果表明，未受精的卵子仍然是活的，在36.0°C下暴露2小时后受精时分裂正常。3小时后，卵子的存活率明显降低。E. mathaei耐36.0°C暴露时间长达40分钟，但超过此时间后受到抑制。表明E. mathaei在34.0°C（高于环境温度6C°）下正常发育，并能承受36.0°C的有限暴露，这可能是该物种广泛分布在经常受到广泛温度波动的栖息地（如礁滩）的原因。
Select temperatures, above normal, are shown to reduce success of fertilization and normal early cleavage in the laboratory for the echinoderms Acanthaster planci (L.), Culcita novaeguineae Muller and Troschel, Linckia laevigata (L.), Echinometra mathaei (de Blainville), and Diadema savignyi Michelin. The data indicate that cleavage is more sensitive to increased temperature than is fertilization. Upper tolerance limits for early cleavage in most of the species examined is near 34.0°C. The early developmental stages of A. planci were the most sensitive to elevated temperature, and those of E. mathaei, the least sensitive. Further experiments with E. mathaei showed that unfertilized ova were still viable, dividing normally when fertilized after 2 h exposure at 36.0°C. The ova were significantly less viable after 3 h. Early cleavage stages of E. mathaei were resistant to 36.0°C for exposure times of up to 40 min, but were inhibited beyond this period. It is suggested that the ability of E. mathaei to develop normally at 34.0°C (6C° above ambient temperature) and to withstand limited exposure to 36.0°C may account for the wide distribution of this species in habitats which are often subjected to broad temperature fluctuations, such as reef flats.