Minimizing the effects of
stress during eyestalk ablation of Litopenaeus vannamei females with
topical anesthetic and a coagulating agent
J. Taylor, L. Vinatea, R. Ozorio, R. Schuweitzer,
E.R. Andreatta-2004
Aquaculture, 233(1-4): 173-179
Abstract:
A topical anesthetic and a coagulating agent were
employed in this study to determine if observable signs of eyestalk ablation
stress could be alleviated in adult female Litopenaeus vannamei
broodstock. The experimental design included four separate treatments, with
each tested group consisting of 15 female shrimp weighing approximately 40
g. Results show that survival of the shrimp was 100% for all treatments, but
reaction to the eyestalk ablation event varied between treatments.
Initiation of normal swimming or recovery and the onset of feeding following
ablation and treatment also varied among the four groups. The results
suggest that the use of a topical anesthetic prior to eyestalk ablation
reduces the visible reactions to stress experienced by L. vannamei
broodstock, allowing for a more humane eyestalk ablation method.
(653B Beach Drive, Nanaimo, BC, Canada, e-mail of J.
Taylor: jk_taylor@hotmail.com,
e-mamil of L. Vinatea: vinatea@mbox1.ufsc.br)