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Effect of thermal acclimation on gametogenesis of the indian freshwater leech, Poecilobdella Viridis (Blanchard)

✍ Scribed by M.M. Hanumante; G.K. Kulkarni

Publisher: Springer
Year: 1978
Tongue: English
Weight: 176 KB
Volume: 61
Category: Article
ISSN: 1573-5141
DOI: 10.1007/bf00018749

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✦ Synopsis

leech, Poecilobdella viridis the present work was initiated with a view to examine the effect of two different thermal schedules on its ovarian and testicular stages during the nonreproductive period .

The effect of thermal acclimation for 15 days on the gametogenesis of Poecilobdella viridis was studied . Leeches conditioned at laboratory temperature (25 .5°-27 .5°C), when warm acclimated (32 .0° ± o .5° C), displayed a significant (p < 0.05) increase in the percentage of oocytes having a diameter of 12 .5 µ and 15 .0 s and in the percentage of fully mature sperm clusters over the controls, whereas cold acclimation (10.0°± o .5°C) did not induce significant (p > 0.05) changes in the oocytes and sperm clusters . Thus it is concluded that in P. viridis temperature is of paramount importance in initiating gametogenesis .

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