Electrode Placement and Electroejaculation of Blue Swimmer Crab, Portunus pelagicus (linnaeus)
Received Date: Apr 10, 2013 / Accepted Date: Jun 28, 2013 / Published Date: Jul 05, 2013
Many workers emphasized the usefulness of electroejaculation technique in artificial insemination studies for hybridization and selective breeding programmes in commercially important decapods. Such techniques are also used to improve the seed production. Similar technique is very much lacking in crabs in general and P. pelagicus in particular. So that electrical stimulation on spermatophore expulsion is studied in P. pelagicus. Among six positions the bilateral ejaculation (extruding spermatophores in both sides) was occurred only in positions I & VI. In all three trials the animals were bilaterally ejaculated 100% in position VI. However in position I the bilateral ejaculation was 66.66%. In other four positions (II, III, IV and V) the ejaculation was happened unilaterally (extruding spermatophores in one side) especially in probe attachment side in all three trials. In positions II & IV all the animals were extruded unilaterally in all the three trials whereas in positions III & V the unilateral ejaculation was 66.66% & 83.33% in trial I, 83.33% & 66.66% in trials II & III respectively. The average volts and seconds required for extrusion of spermatophores was ranged from 5.75 to 7.75 volts and 3.83 to 7.70 seconds respectively. Spermatophore weight was ranged from 33.0 to 105.61 mg.
Keywords: Male crabs; P. pelagicus; Electroejaculation; Technique; Spermatophore
Citation: Soundarapandian P, Varadharajan D, Anand T (2013) Electrode Placement and Electroejaculation of Blue Swimmer Crab, Portunus pelagicus (linnaeus). J Earth Sci Clim Change 4: 142. Doi: 10.4172/2157-7617.1000142
Copyright: ©2013 Soundarapandian P, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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