CONTINUOUS DARKNESS STIMULATES BODY GROWTH OF THE JUVENILE GIANT FRESH-WATER PRAWN, MACROBRACHIUM-ROSENBERGII DEMAN

被引：11
作者：
WITHYACHUMNARNKUL, B
POOLSANGUAN, B
POOLSANGUAN, W
机构：
[1] Department of Anatomy and Faculty of Science, Mahidol University, Bangkok, 10400
[2] Department of Biology, Faculty of Science, Mahidol University, Bangkok, 10400
来源：
CHRONOBIOLOGY INTERNATIONAL | 1990年 / 7卷 / 02期
关键词：
Body; Continuous; Freshwater; Growth; Key words-Photoperiod; Pineal; Prawn; Size; Stimulate; Weight;
D O I：
10.3109/07420529009056960
中图分类号：
Q [生物科学];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The effect of photoperiod on growth of juvenile giant freshwater prawns, Macrobrachium rosenbergii de Man, was tested. The prawns were divided into four groups and each group was reared under one of the following light-dark conditions: continuous darkness (L0:D24), 12 hr light: 12 hr dark (L12:D12), 16 hr light: 8 hr dark (L16:D8), and 20 hr light: 4 hr dark (L20:D4). Body size was determined at the age of 45, 75, and 110 days by measuring total length, orbital length, and carapace length; body weight was determined at the age of 110 days. At 110 days of age, the prawns reared under L0:D24 photoperiod were significantly longer and heavier than those reared under other light-dark conditions. The survival rate of the prawns reared under L0:D24 photoperiod was also higher than that of other groups. This study indicates a positive effect of continuous darkness on growth and survival rate of juvenile giant freshwater prawns, M. rosenbergii. © 1990 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.
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页码：93 / 97
页数：5
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