reproduction of captive raja spp. in the dolfinarium harderwijk
reproduction of captive raja spp. in the dolfinarium harderwijk
复制标题
圈养的 Raja spp. 的繁殖。
DOI：
--
复制
发表时间：
2005
影响因子：
1.2
通讯作者：
J. Koop
中科院分区：
文献类型：
--
作者：
J. Koop
在哈德韦克海豚馆的“雷礁，共有五种拉贾被展出.在一九九三至二〇 〇一年期间，共有四万一千七百七十二只拉贾产卵，其中百分之三十九有卵黄囊，百分之三成功孵化。不同的产卵期，区分物种。没有观察到小斑鳐产卵期的年度差异，而孵化期，即孵化期（4.8-7.0个月），差异很大。海水温度与孵化时间无相关性。
five raja species are displayed in the ‘ray reef’ at dolfinarium harderwijk and, from 1993–2001, 41,772 eggs were laid, of which 39% contained a yolk sac and 3% hatched successfully. different egg-laying periods were distinguished between species. no annual differences in the egg-laying period were observed for raja microocellata, while hatching periods, and thus incubation periods (4.8–7.0 months), differed significantly. no correlation between seawater temperature and incubation time was found.