Publication: Continuous darkness stimulates body growth of the juvenile giant Freshwater prawn, macrobrachiumrosenbergiide man
1
Issued Date
1990-01-01
Resource Type
ISSN
07420528
Other identifier(s)
2-s2.0-0024991429
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Mahidol University
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SCOPUS
Bibliographic Citation
Chronobiology International. Vol.7, No.2 (1990), 93-97
Suggested Citation
Boonsirm Withyachumnarnkul, Boonserm Poolsanguan, Wandee Poolsanguan Continuous darkness stimulates body growth of the juvenile giant Freshwater prawn, macrobrachiumrosenbergiide man. Chronobiology International. Vol.7, No.2 (1990), 93-97. doi:10.3109/07420529009056960 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/15919
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Title
Continuous darkness stimulates body growth of the juvenile giant Freshwater prawn, macrobrachiumrosenbergiide man
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Abstract
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.