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应用生态学报 ›› 2016, Vol. 27 ›› Issue (6): 2009-2014.doi: 10.13287/j.1001-9332.201606.024

• 目次 • 上一篇    下一篇

池塘桡足类休眠卵对浮游种群的潜在补充及其影响因素

田 恬,王 庆,罗洪添,杨宇峰*,   

  1. 暨南大学水生生物研究所/水体富营养化与赤潮防治广东省教育厅重点实验室, 广州 510632
  • 收稿日期:2016-01-05 发布日期:2016-06-18
  • 通讯作者: tyyf@jnu.edu.cn
  • 作者简介:田 恬,女,1990年生,硕士研究生. 主要从事浮游动物生态学研究. E-mail: tian90911@163.com
  • 基金资助:
    本文由国家自然科学基金项目(U1301235,41503072)和农业部公益性行业(农业)专项(201403008)资助

Potential recruitment into planktonic population and influencing factors on the hatching of copepod resting eggs in ponds.

TIAN Tian, WANG Qing, LUO Hong-tian, YANG Yu-feng*   

  1. Institute of Hydrobiology, Jinan University/Key Laboratory of Eutrophication and Red Tide Control, Education Department of Guangdong Province, Guangzhou 510632, China
  • Received:2016-01-05 Published:2016-06-18

摘要: 休眠卵是桡足类的重要生存策略,其在沉积物中的丰度对水体种群的补充具有重要意义.干塘是池塘养殖管理的重要措施,对池塘生态系统具有重要影响.2014年2月15日(干塘前)和3月2日(干塘后),分别采集广州市南沙区养殖池塘内表层沉积物,研究沉积物中桡足类休眠卵对浮游种群的潜在补充及影响因素.结果表明: 干塘前未冷藏沉积物样品在盐度20时的潜在补充量和孵化率最高,4 ℃冷藏4周后最高值出现在盐度为15的处理组.干塘后未冷藏沉积物样品在盐度15时的潜在补充量和孵化率最高,冷藏4周后最高值出现在盐度为20的处理组.这说明干塘前桡足类休眠卵的潜在补充量显著高于干塘后,且干塘对沉积物中休眠卵的持续孵化时间有影响.

Abstract: The formation of resting eggs is an important survival strategy for copepods. The abundance of resting eggs in sediment is of great significance to the recruitment of copepod population in aquatic environment. Desiccation is an important approach of aquaculture management in ponds, which has great influences on pond ecosystem. Surface sediments of aquaculture ponds in Nansha, Guangzhou were sampled before (15th Feberary 2014) and after (2nd March 2014) the desiccation separately to explore the potential recruitment of resting eggs into planktonic copepod population, and environmental factors influencing the hatching success of copepod resting eggs. Results showed that without desiccation and cooling, the highest potential recruitment and immediate hatching rates of resting eggs were observed at the salinity of 20 experimental group, while after cooling to 4 ℃ for four weeks, the hatching rate was highest at the salinity of 15. When exposed to desiccation, the highest potential immediate recruitment and hatching rate of resting eggs were observed at the salinity of 15, while after cooling to 4 ℃ for four weeks, the highest hatching rates were observed at the salinity of 20. It was concluded that desiccation reduced the potential recruitment of resting eggs in sediment significantly (P<0.05), and desiccation had a negative impact on their hatching duration.