| I n or der t o det er mi ne t he ef f ect s of l i ght i nt ensi t y on t he pl asma cor t i sol , osmol al i t y and bi ochemi cal
i ndi ces i ncl udi ng t he cont ent s of t ot al pr ot ei n( TP) , al bumi n( ALB) , t r i gl ycer i des( TG) , t ot al chol est er ol( TC) , asper t at e
ami not r ansf er ase ( AST) ,gl ut ami c-pyr uvi c t r ansami nase ( ALT)and t he act i vi t y ofal kal i ne phosphat ase ( ALP)ofJapanese
f l ounder( Par al i cht hysol i vaceus) ,72 f l ounder swer e t r eat ed wi t h f ourl i ghti nt ensi t y( 0 l x,10 l x,100 l x,and 1 000 l x)f or30
mi n or7 days.The r esul t sshowed t hat ,af t ert r eat i ng 30 mi n,cor t i solchanged,and i tr eached t he l owesti n 10 l x gr oup.As
t i me ext ended t o 7 d,cor t i soldecr eased i n al ll i ghti nt ensi t y,butt he t r end wasconsi st ent .Li ghti nt ensi t y had no si gni f i cant
ef f ecton t he cont ent sofosmol al i t y,TP and ALB.The cont entofTG i n 100 l x gr oup t r eat ed wi t h 30 mi n wast he l owest
and si gni f i cant l y l owert han t hose i n 10 l x gr oup and l 00 l x gr oup,butf or7 d,t he cont entofTG i n 100 l x gr oup wast he
hi ghest .The change ofTC cont entwassi mi l art o TG,wi t h t he ext ensi on oft i me,t he cont entofTC i n 100 l x gr oup showed
i ncr easi ng t r end,butt hose i n 10 l x gr oup had no obvi ouschange.For30 mi n,t he act i vi t i esofAST and ALT i n 10 l x gr oup
wer e t he l owest ,and si gni f i cant l y l owert han t hose i n 1 000 l x gr oup;For7 d,t he changesoft hem wer e const ant .I n t he
shor tt er m ( 30 mi n)l i ghtst i mul at i on,t her e wasno si gni f i cantdi f f er ence f ort he act i vi t y ofALP i n each gr oup,howeveri n
t he l ong t er m ( 7 d)l i ghts t i mul at i on,t he act i vi t y ofALP i n 0 l x gr oup wassi gni f i cant l y l owert han t hati n 10 l x gr oup and
100 l x gr oup.The r esul t si ndi cat e t hose t he opt i mum l i ghti nt ensi t y f orP.ol i vaceusi sabout10 l x.P.ol i vaceuscan adapt
t o di f f er entl i ghti nt ensi t y change t hr ough posi t i ve physi ol ogi calr egul at i on,t hi si si mpor t antf ort hei radapt at i on t o
envi r onment alchange. |
