Growth and gonad development of the sea urchin Hemicentrotus pulcherrimus in an Eisenia kelp bed in the Oshika Peninsula, northern Japan*
Growth and gonad development of the sea urchin Hemicentrotus pulcherrimus in an Eisenia kelp bed in the Oshika Peninsula, northern Japan*
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日本北部大鹿半岛爱胜蚓海藻床中海胆 Hemicentrotus pulcherrimus 的生长和性腺发育*
DOI：
10.11646/zoosymposia.7.1.20
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发表时间：
2012
影响因子：
--
通讯作者：
E. Inomata
中科院分区：
文献类型：
--
作者：
Y. Agatsuma;N. Toda;M. Ogasawara;J. Kinoshita;Masayuki Watanabe;T. Matsui;E. Inomata
为了阐明双环爱胜蚓 (Eisenia bicyclis) 床中的 Hemicentrotus pulcherrimus 的生长和性腺发育，我们检查了 2008 年 3 月至 2009 年 9 月在日本北部大鹿半岛 Kitsunezaki 大约每月收集的海胆的性腺指数、性腺组织学、肠道内容物指数和年龄。我们还监测了六个 1 m2 方格中海带的密度。 1-3年生海带的密度在1-7月份由于强烈的波浪作用而降低。海胆在 1、2 和 3 岁时的测试直径分别为 12.7 毫米、23.7 毫米和 30.5 毫米，这些生长速度与之前研究中在马尾藻床中测量的生长速度相同。性腺恢复阶段分为两个亚类阶段：恢复 I 阶段，残余精子或卵子被更新的营养性吞噬细胞包围，恢复 II 阶段，营养性吞噬细胞充满管腔。恢复I阶段从2月到4月延长，此时性腺指数约为体重的10%，然后通过5月到8月的恢复II阶段和直到10月的生长期急剧上升。性腺指数从11月开始急剧上升，12月性腺由未成熟期转入成熟期时达到最高值18.8，1月在部分产卵和衰弱期下降。在恢复的 I 阶段，肠道含量指数很高，表明从海带上脱落的漂移菌体和侧叶的可用性以及营养吞噬细胞中营养物质的积累。
To elucidate growth and gonad development of Hemicentrotus pulcherrimus in the bed of Eisenia bicyclis , we examined gonad indices, gonad histology, gut content indices and ages of the sea urchins collected approximately monthly from March 2008 to September 2009 in Kitsunezaki in the Oshika Peninsula, northern Japan. We also monitored the densities of the kelp in six 1 m2 quadrates. The kelp at 1- to 3-years of age decreased in density from January to July due to strong wave action. The urchin test diameters at 1-, 2- and 3-years of age were 12.7 mm, 23.7 mm and 30.5 mm, respectively and these growth rates were equal to that measured in Sargassum beds in previous studies. The gonad recovering stage was classified into the two sub-class stages; the recovering I stage with relict spermatozoa or ova surrounded by renewed nutritive phagocytes, and the recovering II stage with nutritive phagocytes filling the lumen. The recovering I stages was prolonged from February to April when the gonad indices were around 10 % of total body weight, then rose sharply through the recovering II stage during May to August and the growing stage until October. The gonad indices rose sharply from November and reached a maximum of 18.8 in December when the gonad shifted from the premature to mature stages, then fell in January at the partly spawned and spent stages. Gut content indices were high at the recovering I stage, suggesting high availability of the drift thalli and lateral blades dislodged from the kelps and accumulation of nutrients in nutritive phagocytes.
海胆 Strongylocenttrolus nudus 和 Hemicentrotus pulcherrimius 的食物与日本本州北部岩藻床和壳状珊瑚平地的垂直分布有关
DOI：
--
发表时间：
2007
期刊：
Marine Ecology Progress Series 352
影响因子：
--
作者：
H. Endo;N. Nakabayashi;Y. Agatsuma;K. Taniguchi
通讯作者：
K. Taniguchi
日本本州北部女川湾海胆 Hemicentrotus pulcherrimus 沿浅水深梯度的分布
DOI：
--
发表时间：
2006
期刊：
J. Shellfish Res. 25
影响因子：
--
作者：
Y. Agatsuma;H. Yamada;K. Taniguchi
通讯作者：
K. Taniguchi