Effects of Bilateral and Unilateral Eyestalk Ablation on Vitellogenin Synthesis in Immature Female Kuruma Prawns, Marsupenaeus japonicus

Jun 7, 2007Zoological science

How removing one or both eyestalks affects egg yolk protein production in young female kuruma prawns

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Abstract

Bilateral ablation of the X-organ/sinus gland complex significantly increased ovarian weight and VTG mRNA levels in immature female kuruma prawns.

  • After bilateral ablation, ovarian development was induced within a 16-day monitoring period.
  • Hemolymph VTG levels and VTG mRNA levels in the ovary increased significantly following bilateral ablation.
  • VTG mRNA levels showed a significant increase just 12 hours after bilateral ablation.
  • Unilateral ablation did not induce ovarian development or significantly change ovarian weight, hemolymph VTG levels, or VTG mRNA levels.
  • The lack of response to unilateral ablation suggests that the remaining X-organ/sinus gland complex may continue to inhibit VTG synthesis.

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