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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >The extent of asexual reproduction in sponges of the genus Chondrilla (Demospongiae: Chondrosida) from the Caribbean and the Brazilian coasts
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The extent of asexual reproduction in sponges of the genus Chondrilla (Demospongiae: Chondrosida) from the Caribbean and the Brazilian coasts

机译：加勒比海和巴西沿海软骨藻属（海绵体）的无性繁殖程度

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摘要

In this study, we estimated the extent of asexual reproduction and genotypic diversity at the intra- and interspecific levels in sponges of the genus Chondrilla in the Caribbean and along the coast of Brazil. Allozymes were used to identify the genotypes of specimens of Chondrilla in each location. The four species studied displayed a large variation in the extent of clonal reproduction and genotypic diversity, with the two species from the Bahamas having a greater proportion of asexually produced individuals than those along the coast of Brazil. Conspecific Brazilian populations of Chondrilla sp. had large differences in clonality: the population from a heterogeneous environment and under the influence of a strong upwelling had little clonality (7%), whereas the population located 350 km south along the coast, in a more homogeneous and temporally stable environment, had a five-fold larger (39%) proportion of asexually derived individuals. Finally, we were able to confirm that, besides fission, the genus Chondrilla displays a second mode of asexual reproduction, by fragmentation of teardrop shaped individuals.
机译：在这项研究中，我们估计了加勒比海和巴西沿岸的软骨藻属海绵中种内和种间水平的无性繁殖和基因型多样性的程度。使用同工酶鉴定每个位置的软骨样品的基因型。研究的这四个物种在克隆繁殖和基因型多样性方面表现出很大的差异，来自巴哈马的两个物种的无性繁殖个体比例比巴西沿海地区更大。巴西软骨藻的同种种群。在克隆性方面存在很大差异：来自异质环境且在强烈上升流的影响下的种群具有很少的克隆性（7％），而位于沿海以南350公里，处于一个更加均匀且时间稳定的环境中的种群具有无性衍生个体的比例增加了五倍（39％）。最后，我们能够确认，除了裂变以外，软骨属还通过泪滴状个体的分裂而显示出第二种无性繁殖方式。

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