A NOTE ON ASEXUAL REPRODUCTION OF A MARGINOPORA SP FROM A MODERN DEEP-WATER POPULATION IN THE HERON-WISTARI CHANNEL, AUSTRALIA
A NOTE ON ASEXUAL REPRODUCTION OF A MARGINOPORA SP FROM A MODERN DEEP-WATER POPULATION IN THE HERON-WISTARI CHANNEL, AUSTRALIA
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DOI：
10.2113/gsjfr.39.1.4
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发表时间：
2009-01-01
影响因子：
1.1
通讯作者：
Morales, Jorge
中科院分区：
文献类型：
--
作者：
Lee, John J.;Fine, Maoz;Morales, Jorge
在Heron岛（大堡礁南部摩摩座邦克群岛）附近Wistari礁以北26米深处采集的大型Marginopora sp.种群标本，在水族箱中过夜繁殖。标本和它的后代被拍了下来。生殖室生长非常脆弱，椎间盘周围大部分破碎。大多数释放出来的后代形成了两个或三个腔室；有几个人组成了四个人。后代的总体大小反映了前室和柔柱大小的相当大的差异。这表明亲本细胞质分裂不均匀和/或幼体生长速率存在差异。所有的后代都是棕色的，他们的测试被虫黄藻包围。虽然在幼体被放生时，虫黄藻就存在于幼体中，但尚不清楚它们是在亲代细胞质被细分时直接获得的，还是由进食的幼体获得的。由于这种生物没有经过连续培养，因此无法对其生命周期进行常规观察，而且由于繁殖阶段很脆弱，不太可能被保存下来，再加上这个阶段很少被观察到，因此本文让读者对这种巨大的原生生物的自然历史进行了简要的观察。
A specimen of a population of large-sized Marginopora sp., collected at 26 m depth north of Wistari Reef, near Heron Island (Capricorn Bunker group of islands, southern Great Barrier Reef), reproduced overnight in an aquarium. The specimen and its offspring were photographed. The reproductive chamber growth was quite fragile, and much of the periphery of the disc was fragmented. Most of the released offspring formed two or three chambers; a few had formed four. The overall sizes of the offspring reflected considerable variance in the sizes of proloculi and flexostyles. This suggests possible uneven division of the parental cytoplasm and/or differences in the growth rates of the juveniles. All of the offspring were pigmented brown, and their tests were surrounded with zooxanthellae. Although it was clear that zooxanthellae were present in them when the juveniles were released, it was not clear whether they were acquired directly while the parental cytoplasm was being subdivided, or if they were acquired by the feeding juveniles. Because this organism has not been in continuous culture, which would allow routine observation of its life cycle, and because the reproductive stage is fragile and not likely to be preserved, and further because the stage has rarely been observed, this paper gives the reader a snapshot observation of the natural history of this giant protist.