Current Evidence on Prevention and Management of Early Onset Neonatal Sepsis

Abstract

Fucus dlstichus L. emend Powell population at False Creek, Vancouver, Canada, showed seasonal variations In plant mean length and growth rates. Mean length was greater in wlnter (4.2 to 5 3 cm) and lower In summers of 1986 and 1987 (2.7 to 4 3 cm). Absolute growth rates showed a significantly opposite trend, being hlgher In spnng and summer (0.24 to 1.17 cm mo-') and lower in fall to winter (-0 5 to 0.4 cm mo-l) Spearman rank-order correlation indicated that, with some except~ons, monthly patterns of change In plant mean length for plants of different ages were slgnlflcantly correlated, but growth rates were not slgniflcantly correlated among ages. Patterns of change In length among cohorts were s ign~f~cant lcyo rrelated, but those of growth rates were not, suggesting a low dependence of growth rate on age Growth rate was significantly correlated (Spearman rank-order correlation) wlth plant length, and the patterns of change in growth rates among plants of different size classes were also significantly correlated (Pearson's correlation), suggesting that growth rate IS strongly size-dependent. A seasonal pattern became more obvious only lf plants were grouped by slze rather than by age. Plants from different cohorts generally had constant rates of mortality Mortality was generally hlgher for younger and smaller plants durlng winter and sprlng, and for older and larger plants during summer Older plants also exhibited hlgher mortallty in the fall. Log linear analysis indicated that the effects of both size (length) and age on growth rate, wlth or without the effect of mortality, and on mortallty considered alone, were s~gnificant.H owever, when the contr~butiono f size was known, the effect of age on mortallty became insignificant. Size is shown by assoclation analyses to be a better predictor of growth and rnortallty than age.