Early development of the self-fertilizing mangrove killifish Rivulus marmoratus reared in the laboratory
Early development of the self-fertilizing mangrove killifish Rivulus marmoratus reared in the laboratory
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DOI：
10.1007/s10228-004-0235-5
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发表时间：
2004-12-01
影响因子：
1.2
通讯作者：
Hagiwara, A
中科院分区：
文献类型：
--
作者：
Grageda, MVC;Sakakura, Y;Hagiwara, A
红树林鳉鱼 Rivulus marmoratus 在 25 +/- 1 摄氏度和 17 ppt 盐度下孵化后 0 至 100 天 (DAH) 进行饲养，通过检查生长和形态参数、分枝特征（椎骨和鳍条计数）、骨软骨发育和色素沉着来描述其早期发育。肛前长度、头部长度、吻部长度、身体深度、胸鳍长度、背鳍长度、臀鳍长度和尾柄深度的生长是等距的。在眼睛直径和张口大小方面观察到负异速生长。椎骨 (34.2 +/- 0.4) 和背鳍 (8.6 +/- 0.5)、肛鳍 (11.4 +/- 0.5) 和尾鳍条 (30.2 +/- 0.8) 的分枝计数 (平均值 +/- SD) 在 0 DAH 时完成 (n = 5)，而胸鳍条和腹鳍条在 30 DAH 时完成（14.5 +/- 0.4，n = 5）和 60 DAH（4.2 +/- 0.8，n = 5）。分生元素的完全骨化按以下顺序进行：椎骨（30 DAH），尾鳍、背鳍和臀鳍条（60 DAH），胸鳍条（60 DAH 和 100 DAH 之间）和腹鳍条（100 DAH）。形态特征和分枝计数均表明该物种标准长度（20 DAH）达到9.8毫米后可被视为幼体。
The mangrove killifish Rivulus marmoratus was reared at 25degrees +/- 1 degreesC and 17 ppt salinity from 0 to 100 days after hatching (DAH), and its early development was described by examining growth and morphometric parameters, meristic characters ( vertebral and fin-ray counts), bone-cartilage development, and pigmentation. Growth was isometric for preanal length, head length, snout length, body depth, pectoral-fin length, dorsal-fin length, anal-fin length, and caudal-peduncle depth. Negative allometric growth was observed in eye diameter and gape size. Meristic counts ( mean +/- SD) for vertebrae (34.2 +/- 0.4) and dorsal- (8.6 +/- 0.5), anal- (11.4 +/- 0.5), and caudal-fin rays (30.2 +/- 0.8) were complete at 0 DAH ( n = 5), whereas pectoral-fin rays and pelvic-fin rays were complete by 30 DAH (14.5 +/- 0.4, n = 5) and 60 DAH (4.2 +/- 0.8, n = 5). Full ossification of meristic elements proceeded in the following sequence: vertebrae ( by 30 DAH), caudal-, dorsal-, and anal- fin rays ( by 60 DAH), pectoral-fin rays ( between 60 DAH and 100 DAH), and pelvic-fin rays ( by 100 DAH). Both morphological characters and meristic counts indicate that this species can be considered to be a juvenile after 9.8 mm in standard length (20 DAH).