the effects of salinity in biology of crustacean scapholeberis
TRANSCRIPT
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( ti nr nchio Jrocla : Clatlocer.a)
[,rrurn II. Alilinuanr K. ;\bbas
Ali A. Al-L:rnriSu hailir S.,.\l-D ulinry
Fish Dept.- AgricLrl. anci Lliol. Ites. Irrsr., I)O Ilor 765, Baghclacl.lracl
Abstract:The present stLrtly clcalt with the acute and chronic toxic effeots ol.salipity on
tlre crttstttceans Sc:apholcbe ris' kingi. The meclian lethal concentration (LC50) lor 24 hr\vas 2.8 o/oo, so for the chronic exposLlre expeliments a saliniry of 0.75 ald 1.5%. weretrsed. The chronic exposure caused nlany dilferences in tlre iife tablc comparir-rg withthat ol' cotttt'ol, lhese cliffercnces werc as lbllows recluction in rate of explctatio' forlitrthcr lil'c, rtumber ol' prodtrced eggs ancl young's antl both nunrbcr & v6lupre olcltttch's. In adclitiorl, lhe ttteatt ol'length, nican loirgevity ancl number ol'lrolts wercreclttced rvlticlt rcler to the to.xic cflect ol- continuo,,, L*pnr,,,-c to higher salinitycc-rncentrzrtitttrs.
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9. n ['lln. Arncricltrr I,rrhlic: llcaltlrAssociation .( 198-5). Stanclar.drrrcLltocls firr cxarrr ilration o I u,atr:rancl rvastc u,atcr. l4 th. crl. l2g6 p1r
10. Arncr'. IV{. & I(oivisto. S.(1993). I:l'[ects ot- salinity, onrretatlolisnr arrcl lile histon,clraractcrislics o[' Du1tltnia,,,r,g,,nI'lyclrobiolo gia.259 (2): 6t)-77 .
Il. Ednrondsorr. U/ 'l . (1959)I?rcslr r.r,;l{cr biolrlgl,. 2"'l . ccl. Wilcvarrcl Sons. Irrc., Ncrv yor.l<: l24gpp.
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14. Riclrards, L A . ( 1954 ) .
Diagnosis and inrpr-ovcllerrt ol.saline ancl alkali soils.Unitccl Sta(csDcpartrrrerrt oI Agriculturc, IIanclbool< No. 60. tiSA. Waslrirrgtorr, D.C. I60 pp.
15. Sanclrez, M.; Ferrando, M. D.;Sarrcho, E. and Andr.eu- I\4olirrer.,E. ( I 998). Ilvalurion of a Dophnianlctgno rcnerval lilc-cycle testrrethod u,ith Diazinon. .1. Errviron.Sci. Ilealtlr, 833 ((r): 785-797.
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