Efeito da conservação em formol de organismos bentónicos na determinação da sua biomassa

Abstract

Normally, formalin at a standard 4% solution has been used as a preservative (preservative) for various organisms, and it has never been thought about the fact that this can influence them over the time of their conservation. For this reason, it is interesting to study the influence of this preservative on preserved organisms. For this work, three species were studied, namely Donax faba, Dotila fenestrata and Idannthyrsus Pennatus, each species being represented by 3 groups of different sizes in order to analyze the effect of this conservation, on the different sizes of the species, and the different species reactions for species over conservation time. For this purpose, 3 analyzes were performed for all size groups of the 3 species, namely after 7, 30, 60 days and at 90 (only partially) of conservation. AFDW was measured by dry weight and ash weight. A value of a correction factor was introduced, and the variance analysis was performed using the Two-Way ANOVA method, multiple comparison tests were performed ( LSD test -" least significant difference" and Duncan test). And the linear regression of type y=ax+b.