VIKA MAULIDIYAH, 141111082 and Laksmi Sulmartiwi, ,- and Endang Dewi Masithah (2019) The effect of immersion time in tannin solution towards the adhesiveness and hatching degree of the eggs of common carp (Cyprinus carpio). AACL Bioflux.

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Abstract

Tannin solution can eliminate the adhesion of carp eggs due to its ability to precipitate glycoproteins in the egg layer. However, this solution may adversely affect the egg in case of prolonged immersion, as tannin may harden the egg, thus making the embryo difficult to hatch. This study aims to determine the optimal immersion time for carp (Cyprinus carpio) eggs in tannin solution and its effect towards adhesion and hatching degree. The experimental study was conducted by means of a Completely Randomized Design (CRD), consisting of three treatment groups and six replications. Samples were divided in control group (egg without immersion) and treatment groups (egg immersed in tannin solution for 120 and 180 seconds). The acquired data was analysed by ANOVA testing to find differences between groups, then using Duncan’s multiple distances to find the best performed treatment. There was no significant difference for carp egg adhesion (p>0.05), yet the carp egg hatching degree was significantly different among groups (p<0.05). The highest recorded mean of the hatching rate was for the control group, 74.66%. The duration of egg immersion in tanning solution did not eliminate the egg adhesion, but reduced the hatching degree.

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