A.V. Zhirmunsky Institute of Marine Biology, Far East Branch of Russian Academy of Sciences, Palchevsky Str. 17, 690059 Vladivostok, Russia.
J Invertebr Pathol. 2013 May;113(1):86-95. doi: 10.1016/j.jip.2013.02.003. Epub 2013 Feb 21.
The effects of Coccomyxa sp. infestation on the reproductive characteristics of the horse mussel Modiolus modiolus from the north-western Pacific (Peter the Great Bay, Sea of Japan) are demonstrated in this study. The mussels were collected monthly from May to September of 2009, and the prevalence of females and males with green tissues was 39% and 47%, respectively. Overall, the green alga infection caused a mild effect on gametogenesis in the horse mussel. The dynamics of gonad development in the healthy and infected mussels during the study period was generally similar, with the spawning being partial and occurring from the beginning of June to the first half of September; total spawning was recorded at the end of this period. However, several negative reproduction-related effects of the green alga infestation were observed, i.e., general gonadal underdevelopment, which was apparent from significant decrease in the acinus areas of the ovaries and testes and an increase in the connective tissue layer between the acini, a delay in some stages of the reproductive cycle and production of decreased number of spermatozoa and large vitellogenic oocytes, especially in the early spawning period (June). All of these results suggest a reduced reproductive output for the infected mussels.
本研究表明，球菱形藻感染对西北太平洋（日本海彼得大帝湾）贻贝的繁殖特征产生了影响。这些贻贝于 2009 年 5 月至 9 月每月采集一次，携带绿色组织的雌、雄贻贝的流行率分别为 39%和 47%。总体而言，绿藻感染对贻贝的配子发生仅产生轻微影响。在研究期间，健康贻贝和感染贻贝的性腺发育动态总体相似，产卵具有局部性，从 6 月初持续到 9 月上半月；在此期间末记录到总产卵量。然而，绿藻感染对繁殖产生了一些负面影响，例如，性腺普遍发育不良，这表现在卵巢和精巢的腺泡面积显著减小，腺泡之间的结缔组织层增加，生殖周期的某些阶段延迟，精子和大型卵黄生成卵母细胞的数量减少，尤其是在早期产卵期（6 月）。所有这些结果表明，感染贻贝的繁殖产量降低。
