A note on the reproductive ecology of the torrent catfish, Liobagrus reini (Siluriformes: Amblycipitidae)
A note on the reproductive ecology of the torrent catfish, Liobagrus reini (Siluriformes: Amblycipitidae)
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关于激流鲶鱼 Liobagrus reini（鲶形目：Amblycipitidae）繁殖生态学的注记
DOI：
10.11369/jji1950.41.219
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Katsutoshi Watanabe
中科院分区：
文献类型：
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作者：
Katsutoshi Watanabe
材料与方法1989年6月和1990年5月在日本三重县北势町下平至木（35·<$10 ′ N，136·<$31 ′ E）稻部川的支流田折川和岐阜县美浓加茂市伊深町长良川的支流川浦川（35·<$30 ′ N，137·<$01 'E，1990年4月和6月。两条河流的研究地点为BB型（Kani，1971），在卵石河床上零星分布着许多巨石。在Tagiri河研究地点，L。reini是通过人工翻转巨石找到的。如果可能，收集卵和伴随的鱼，并保存在10%福尔马林中。捕获的鱼的性别通过直接观察性腺来确认，而未捕获的鱼的性别则通过目视脸颊和头部肌肉的形状来确定，该形状具有性二态性（Son，1987; Mori和Nagoshi，1989）。由于L.由于Tagiri河中的reini低，在Kawaura河中收集了卵巢卵计数所需的雌性标本。测量保存在10%福尔马林中的标本的标准长度（SL），并计数最大尺寸模式携带的卵巢卵子数量。检查的样本登记如下：Tagiri R.，NSMT（国立科学博物馆，东京）-P 36039，雄性（89.5 mm SL）和卵，1990年5月28日; Kawaura R.，NSMT-P 36040，一只雌性（68 mm SL），1990年6月4日; NSMT-P 36041，8只雌性（64.2-86.3 mm SL）（共19个标本），1990年4月24-27日。
Materials and MethodsSample collections and egg observations of Liobagrus reini were undertaken in the Tagiri River, a tributary of the Inabe River, Shimohira to Ageki, Hokusei-cho, Mie Prefecture, 35•‹ 10'N, 136•‹ 31'E, in June 1989 and May 1990, and the Kawaura River, a tributary of the Nagara River, Ibuka-cho, Minokamo City, Gifu Prefecture, 35•‹ 30'N, 137•‹ 01'E, in April and June 1990. The study sites of the two rivers were Bb-type(Kani, 1971), patchily dotted with many boulders on the pebbly river beds. At the Tagiri River study site, spawning sites of L. reini were located by manually turning over the boulders. The eggs and accompanying fish, when possible, were collected and preserved in 10% formalin. Sex of the captured fish was confirmed by direct observation of the gonads, whereas that of fish which were not captured, was determined visually from the shape of the cheek and head muscle which is sexually dimorphic(Son, 1987; Mori and Nagoshi, 1989). Since the density of L. reini in the Tagiri River was low, female specimens required for ovarian egg counts were collected in the Kawaura River. Standard lengths(SL) of the specimens preserved in 10% formalin were measured, and number of ovarian eggs carried by the largest-size mode counted. Specimens examined were registered as follows: Tagiri R., NSMT(National Science Museum, Tokyo)-P 36039, a male(89.5 mm SL) and eggs, May 28, 1990; Kawaura R., NSMT-P 36040, a female(68mm SL), June 4, 1990; NSMT-P 36041, 8 females(64.2-86.3 mm SL)(out of 19 specimens), April 24-27, 1990.