SPAWNING, DEVELOPMENT, AND ACQUISITION OF ZOOXANTHELLAE BY TRIDACNA-SQUAMOSA (MOLLUSCA, BIVALVIA)
SPAWNING, DEVELOPMENT, AND ACQUISITION OF ZOOXANTHELLAE BY TRIDACNA-SQUAMOSA (MOLLUSCA, BIVALVIA)
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DOI：
10.2307/1540800
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发表时间：
1981-01-01
影响因子：
1.6
通讯作者：
TRENCH, RK
中科院分区：
文献类型：
--
作者：
FITT, WK;TRENCH, RK
文蛤的产卵和发育。1980年2月和3月在西加罗林群岛[西太平洋]的Belau调查了鳞叶藓。在6个spp.在不同的刺激条件下，有5个蛤类产卵，但只有T.鳞片释放成熟的卵。并对影响性腺发育和产卵的因素进行了讨论。T.鳞状的是从受精后到变态后，重点是获得zooxanthella Symbiodinium（= Gymnastinium）microadriaticum Freudenthal。在受精卵和担轮幼虫期均未见共生藻。所有S.将引入面盘蛤的microadriaticum通过口腔摄入胃中。面盘幼虫比游动虫更容易摄取游动虫黄色素。在变态后2-9天内，虫黄藻以一种未知的机制进入发育中的管组织。大多数这些虫黄藻似乎是在空间，可能是发展中的血管窦。在某些情况下，很难判断虫黄嘌呤是细胞内还是细胞外。存活和生长的面盘幼虫和青少年与zooxanthropium大于那些没有zooxanthropium。虫黄藻幼鱼可以在以光为唯一能源的微孔过滤海水中存活和生长10个月以上，说明了这种共生关系的光养方面。这些观察结果可能有实际应用有关的产卵，发育和生长的tridacnid蛤在商业海水养殖的背景下。
Spawning and development of the clam T. squamosa was investigated in Belau, Western Caroline Islands [Western Pacific Ocean] in Feb. and March 1980. Of the 6 spp. of tridacnid clams, 5 spawned in response to various stimuli, but only T. squamosa released mature eggs. Factors influencing gonad development and spawning are discussed. Development of T. squamous was followed from post-fertilization to post-metamorphosis, with emphasis on the acquisition of the zooxanthella Symbiodinium (= Gymnodinium) microadriaticum Freudenthal. The symbiotic algae were not seen in either the fertilized eggs or trochophore stages. All strains of S. microadriaticum introduced to veliger clams were taken into the stomach via the mouth. Veligers ingested motile zooxanthellae more readily than motile ones. Within 2-9 days after metamorphosis, zooxanthellae moved by an unknown mechanism into the developing siphonal tissues. Most of these zooxanthellae appeared to be in spaces, probably the developing hemal sinuses. In some cases it was difficult to tell if the zooxanthellae were intra- or extracellular. Survival and growth of veligers and juveniles with zooxanthellae was greater than those without zooxanthellae. Juveniles with zooxanthellae can survive and grow in millipore-filtered seawater with light as the sole energy source for over 10 mo., illustrating the phototrophic aspect of the association. These observations may have practical application pertinent to spawning, development and growth of tridacnid clams in the context of commercial mariculture.