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Title: Continuous light increases N-acetyltransferase activity in the optic lobe of the giant freshwater prawn Macrobrachium rosenbergii de Man (Crustacea: Decapoda)
Authors: Boonsirm Withyachumnarnkul
Anchalee Pongsa-Asawapaiboon
Supaporn Ajpru
Panu Siamwalla
Wantanee Trakulrungsi
Chuanpis Samritthong
Mahidol University
Keywords: Biochemistry, Genetics and Molecular Biology;Pharmacology, Toxicology and Pharmaceutics
Issue Date: 1-Jan-1992
Citation: Life Sciences. Vol.51, No.19 (1992), 1479-1484
Abstract: Giant freshwater prawns, Macrobrachium rosenbergii de Man, were reared under three different lighting conditions: continuous darkness (DD), 12 hr of light and 12 hr of darkness (LD 12:12) and continuous light (LL). After one month, the prawns were sacrificed and optic lobes isolated from the eyestalks were determined for N-acetyltransferase (NAT) activities and melatonin concentrations. Gonads were weighed and examined under light microscopy. The optic lobes from LL prawns contained significantly higher activities of NAT than those from LD 12:12 prawns. The melatonin concentrations and size and histological features of the gonads from the three groups of prawns did not differ. The results indicate that continuous light increases NAT activities in the optic lobe of M. rosenbergii but has no drastic effect on gonadal growth. © 1992.
ISSN: 00243205
Appears in Collections:Scopus 1991-2000

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