{"refrec":{"BRefID":225167,"RR":"<b>Okemwa, E. N.; Ruwa, R. K.; Polk, P.</b> (1986). The autecology of the edible oyster <i>Crassostrea cucullata</i> Born, 1778: size related vertical distribution at Mkomani, Mombasa. <i>Kenya J. Sci. (B Biol. Sci.) 7(2)</i>: 9-14","BEntID":216890,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Kenya J. Sci. (B Biol. Sci.) 7(2)</i>: 9-14","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Okemwa, E. N.; Ruwa, R. K.; Polk, P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Okemwa, E. N. <i>et al.</i>","Englishabstract":"The littoral oyster <i>Crassostrea cucullata</i> occurs between 1.05-3.35 m above chart datum with the highest density occuring between 1.85-2.75m. Its distribution is size-related as demonstrated by computation of correlation coefficients (r) and regression equations. The shell lengths (i.e. maximum linear dimension) decreases in an upshore direction. The analysis show high r-values which are significant at p<0.001. The equations and the r values are as follows: 1. for the lower level oysters between 1-1.85 m: y = 43.64-6.49 x, r = -0.659;2. for the mid-level oysters between 1.86-2.75 m: y = 62.67-17.14 x, r = -0.941; and 3. for the high level oysters between 2.76- 3.35 m: y = 91.44-24.85 x, r = -0.899; where y stands for the mean shell length (mm) and x is the mean height (m) above datum. The elevation and density related effects on the shell lengths of the oysters are discussed. 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