不同饵料密度和盐度下褶皱臂尾轮虫的生活史特征

doi:10.13292/j.1000-4890.202304.018

生态学杂志 ›› 2023, Vol. 42 ›› Issue (4): 897-904.doi: 10.13292/j.1000-4890.202304.018

不同饵料密度和盐度下褶皱臂尾轮虫的生活史特征

刘毅^1,3,崔宇翔¹,罗颖²,祁洪芳²,杨建新²,吴洪芳²,曲疆奇¹,张清靖^1,2,3*

(¹北京市农林科学院水产科学研究所，渔业生物技术北京市重点实验室，北京 100068； ²青海湖裸鲤救护中心，青海省青海湖裸鲤繁育与保护重点实验室，西宁 810016； ³大连海洋大学，辽宁省水生生物学重点实验室，辽宁大连 116023)

出版日期:2023-04-03 发布日期:2023-04-03

Life history characteristics of rotifer Brachionus plicatilis under different food densities and salinities.

LIU Yi^1,3, CUI Yuxiang¹, LUO Ying², QI Hongfang², YANG Jianxin², WU Hongfang², QU Jiangqi¹, ZHANG Qingjing^1,2,3*#br#

#br#

(¹Beijing Key Laboratory of fishery Biotechnology, Fisheries Science Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100068, China; ²Qinghai Key Laboratory of Qinghai-Lake Naked Carps Breeding and Conservation, Rescue and Rehabilitation Center of Naked Carps of Qinghai Lake, Xining 810016, China; ³Key Laboratory for Hydrobiology in Liaoning Province, Dalian Ocean University, Dalian 116023, Liaoning, China).

Online:2023-04-03 Published:2023-04-03

摘要/Abstract

摘要： 为探索低盐驯化褶皱臂尾轮虫规模化培育的可行性，本实验以小球藻（Chlorella vulgaris）为饵料，在饵料密度1.0×10⁴、1.0×10⁵、1.0×10⁶、1.0×10⁷和1.0×10⁸ cells·mL^-1下，采用单个体培养法，研究了盐度23及盐度6的褶皱臂尾轮虫（Brachionus plicatilis）的生活史特征。结果表明：随着饵料密度的升高，两组盐度轮虫的生殖期、平均寿命、产卵量、生命期望、净生殖率、世代时间和种群内禀增长率均呈现出先升高再降低（P<0.05）；盐度6的轮虫在饵料密度1.0×10⁶、1.0×10⁷和1.0×10⁸ cells·mL^-1下的生殖前期显著小于饵料密度1.0×10⁴和1.0×10⁵ cells·mL^-1下的生殖前期（P<0.05）；盐度23的轮虫在饵料密度1.0×10⁶和1.0×10⁷ cells·mL^-1下的生殖前期显著小于饵料密度1.0×10⁴、1.0×10⁵和1.0×10⁸ cells·mL^-1的生殖前期（P<0.05）。饵料密度1.0×10⁴ cells·mL^-1下盐度6的轮虫净生殖率和种群内禀增长率均显著低于盐度23的轮虫（P<0.05）；饵料密度1.0×10⁵ cells·mL^-1下盐度6的轮虫的生命期望显著高于盐度23的轮虫（P<0.05）；饵料密度1.0×10⁶ cells·mL^-1以上时，盐度6的轮虫的产卵量、净生殖率和种群内禀增长率均显著高于盐度23的轮虫（P<0.05）。通过生活史特征比较，褶皱臂尾轮虫由于淡水起源性，能够从盐度23的环境逐步驯化到盐度6的环境，且在饵料密度大于1.0×10⁶ cells·mL^-1下盐度6的褶皱臂尾轮虫的生殖率要高于盐度23，其低盐规模培育是可行的。

关键词: 褶皱臂尾轮虫, 小球藻, 饵料密度, 低盐驯化, 生活史特征

Abstract: To explore the feasibility of large-scale cultivation of rotifer Brachionus plicatilis under low salinity, we investigated life history characteristics of B. plicatilis under salinity-23 and salinity-6 and fed with Chlorella vulgaris at 1.0×10⁴, 1.0×10⁵, 1.0×10⁶, 1.0×10⁷and 1.0×10⁸ cells·mL^-1 by single culture method. The results showed that the reproductive duration, average life span, spawning quantity, life expectancy at hatching (e₀), net reproductive rate (R₀), generation time (T), and intrinsic rate of population increase (r_m) of B. plicatilis in both two salinities increased at first and then decreased with increasing feed densities (P<0.05). The duration of juvenile B. plicatilis under salinity-6 under three food densities of 1.0×10⁶, 1.0×10⁷ and 1.0×10⁸ cells·mL^-1 was smaller than that under food densities of 1.0×10⁴ and 1.0×10⁵ cells·mL^-1 (P<0.05). The duration of juvenile B. plicatilis under salinity-23 under food densities of 1.0×10⁶ and 1.0×10⁷ cells·mL^-1 was smaller than that under food densities of 1.0×10⁴, 1.0×10⁵ and 1.0×10⁸ cells·mL^-1 (P<0.05). The R₀ and r_m of B. plicatilis under salinity-6 were lower than those under salinity-23 in food density of 1.0×10⁴ cells·mL^-1. The e⁰ of B. plicatilis under salinity-6 was significantly higher than that under salinity-23 in food density of 1.0×10⁵ cells·mL^-1. When food density was above 1.0×10⁶ cells·mL^-1, the oviposition quantity, R₀ and r_mof B. plicatilis under salinity6 were significantly higher than those under salinity-23. Our results indicated that B. plicatilis under salinity-23 can gradually acclimate to the environment under salinity-6, due to its freshwater origin. The reproductive rate of B. plicatilis under salinity-6 is higher than that under salinity-23 under food density of above 1.0×10⁶ cells·mL^-1. It is feasible for large-scale cultivation of rotifer B. plicatilis under low salinity.

Key words: Brachionus plicatilis, Chlorella vulgaris, food density, low salt acclimation, life history characteristics.

刘毅, 崔宇翔, 罗颖, 祁洪芳, 杨建新, 吴洪芳, 曲疆奇, 张清靖. 不同饵料密度和盐度下褶皱臂尾轮虫的生活史特征[J]. 生态学杂志, 2023, 42(4): 897-904.

LIU Yi, CUI Yuxiang, LUO Ying, QI Hongfang, YANG Jianxin, WU Hongfang, QU Jiangqi, ZHANG Qingjing. Life history characteristics of rotifer Brachionus plicatilis under different food densities and salinities.[J]. Chinese Journal of Ecology, 2023, 42(4): 897-904.

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不同饵料密度和盐度下褶皱臂尾轮虫的生活史特征

Life history characteristics of rotifer Brachionus plicatilis under different food densities and salinities.

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