Seasonality of asexual reproduction in Holothuria (Halodeima) atra, H. (H.) edulis and Stichopus chloronotus (Holothuroidea: Aspidochirotida) on the Great Barrier Reef
Seasonality of asexual reproduction in Holothuria (Halodeima) atra, H. (H.) edulis and Stichopus chloronotus (Holothuroidea: Aspidochirotida) on the Great Barrier Reef
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DOI：
10.1007/s002270050184
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发表时间：
1997
期刊：
影响因子：
2.4
通讯作者：
S. Uthicke
中科院分区：
文献类型：
--
作者：
S. Uthicke
对海参（Holothuria（Halodeima）atra，H.（H.）edulis和Stichopus chloronotus在大堡礁的三个近岸边缘礁和一个中间架礁。绿球藻的分裂仅发生在3月至10月之间，峰值为7月一个种群中最近分裂的个体的31%。在5月至7月期间，最高值在16%至26%之间。INH. edulis，无性繁殖只发生在3月和7月之间，最大的17%最近分裂的个体在3月。H. atraandS.冬季的绿脓杆菌含量明显高于其他季节。为H。在Fantome岛上，估计每年至少有76%的个体经历裂变，而在中陆架礁上只有9%经历裂变。最高的年裂变率（43%）为S。绿杆菌在大棕榈岛的密集种群中被发现。较低密度的中陆架珊瑚礁人口表现出相对较低的年裂变率（19%）。约占H.教育每年都在发生裂变。四个种群的年分裂率与种群密度呈正相关。chloronotusandH. atrastudied。
Asexual reproduction by fission was monitored for 18 mo in populations ofHolothuria(Halodeima)atra,H.(H.)edulisandStichopus chloronotuson three nearshore fringing reefs and one midshelf reef in the Great Barrier Reef. Fission inS. chloronotusoccurred exclusively between March and October, with a peak value of 31% recently divided individuals in one population in July.H. atrashowed a similar pattern, with maxima of between 16 and 26% from May to July. InH. edulis, asexual reproduction occurred only between March and July, with a maximum of 17% recently divided individuals in March. Fission rates ofH. atraandS. chloronotusin winter were significantly higher than in all other seasons. ForH. atra, at least 76% of all individuals at Fantome Island were estimated to undergo fission per year, whereas only 9% undergo fission on the midshelf reef. Highest annual fission rates (43%) forS. chloronotuswere found in a dense population on Great Palm Island. The lower-density midshelf reef population exhibited comparatively lower annual fission rates (19%). About 24% ofH. edulisundergo fission each year. Annual fission rate and population density were positively correlated in the four populations ofS. chloronotusandH. atrastudied.