摘要
研究了两品系蒙古裸腹潘（晋南品系和内蒙品系）继饥饿后的补偿生长及其生长发育的适宜食物密度。结果表明，两品系蒙古裸腹潘生长发育的最适食物——海水小球藻密度均为250×10^4／mL。对两品系蒙古裸腹潘而言，饥饿0．5d的蒙古裸腹涵有全补偿生长，饥饿1～2d有部分补偿生长现象，饥饿超过3d已没有补偿生长。可以认为，蒙古裸腹潘仅在短时间饥饿时有补偿生长现象的发生。
Two experiments were conducted in order to determine the optimum food density of Moina mongolica and to clarify M. mongolica have or not the phenomenon of compensatory growth. The test animals were two strains of Moina mongolica （Jinnan strain and Neimeng strain） in this study. Jinan strain of M. mongolica was collected from Lake Xiaochi in south of Shanxi Province in 1982; Neimeng strain of M. mongolica was collected from Lake Zhagesitai in Inner Mongolia in 2002. Laboratory-reared M. mongolica juveniles （ age was less than 2h ） obtained from parthenogenetic females were used for the experiment of; a monoculture of Chlorella p〉,renoidesa （in exponential phase of growth） was offered as food for M. mongolica, aerated and Nucleopore fltered sea water （FSW） of salinity 32-33 with the required volume of distilled water, and culture water was changed every two days. All the experiment were conducted at temperature （25±0.5）C and light intensity 2000 - 3000 lx. A photoperiod of 14h light：10h dark was maintained for culturing and testing. The effects of food densities （C. pyrenoidesa, 0, 0. 1× 10^4, 0. 5×10^4, 1 × 10^4, 5 ×10^4, 30×10^4, 100×10^4, 150×10^4, 250×10^4, 300×10^4cell·mL^-1） on body length, heart-throb, reproduction, life span and intrinsic rate of increase of two strains M. mongolica were studied in Experiment 1. Results indicated that the optimum food density for growth and reproduction of two strains of M. mongolica was 250×10^4 cell·mL^-1. The compensatory growth of two stains of M. mongolica following different periods of starvation （ i.e. 0.5, 1, 2, 3, 4 and 5 d） was studied in experiment 2. The results indicated that M. mongolica have completely compensatory growth effects in recover feeding following 0.5d starvation, while those prexiously starved 1-2 d and 3 d, have partially and no compensatory growth capacities, respectively, after refeeding.
出处
《生态学报》
CAS
CSCD
北大核心
2005年第8期2103-2108,共6页
Acta Ecologica Sinica
基金
辽宁省自然科学基金资助项目(20022100)~~
关键词
地理品系
蒙古裸腹潘
饥饿
补偿生长
适宜食物密度
geographical strains
Moina mongolica
starvation
compensatory growth
optimum food density
