Seasonal Variations of hard parts of Hamatopeduncularia thalassini Bychowsky and Nagibina, 1969 (Monogenea: Dactylogyridae, Ancyrocephalinae) on the gills of Mystus seenghala in river Ganges near Chandpur (U. P.) India
Journal Title: Voyager - Year 2017, Vol 0, Issue 2
Abstract
There are several abiotic factors including temperature, oxygen, pH etc. that affect the phenotypic plasticity of parasites. During present study, the authors concentrated on seasonal variation in measurements of attachment apparatus of Hamatopedunculariathalassini Bychowsky and Nagibina, 1969. Worms were collected from Mystusseenghalaat different water temperatures. Samples were taken at monthly intervals of about 30 (± 5) days during the period from December 2009 to March 2012. Main results indicate that the difference between winter and spring conditions cause significant changes in morphometrical variables of measurements of anchors and connective bars.All 14 characters (including length and width of transverse processes of dorsal transverse bar) measured on each of the 07 samples were normally distributed. Out of 16 characters, 10 have shown positive correlation with each other. During present investigation, it was found that dorsal anchor (including anchor shaft and point) is inversely related to water temperature. Length of outer root is temperature independent. Length and median width of dorsal transverse bar is inversely related to water temperature. Ventral anchor (including anchor shaft and point) is inversely related to water temperature. Length of outer and inner root is temperature independent. Length andwidth of ventral transverse bar is also inversely related to water temperature.
Authors and Affiliations
Pragati Rastogi, Dr. Jyoti Singh
Keywords
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