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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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    Abstract - Issue Nov 2008, 29 (6)                                     Back


Interactions between marine facultative epiphyte Chlamydomonas sp

Estimation of amino acids, urea and uric acid in tasar silkworm, Antheraea mylitta Drury

 

G. Shamitha* and A. Purushotham Rao

?Department of Zoology, Kakatiya University, Warangal ? 506 009, India

(Received: August 10, 2006; Revised received: March 01, 2007; Re-revised received: July 20, 2007; Accepted: August 07, 2007)

Abstract: The tasar silkworm, Antheraea mylitta Drury, Andhra local ecorace is an exclusive race of Andhra Pradesh. It is on the verge of extinction due to difficulty of acclimatisation at breeding and rearing stages. As an attempt to protect this race, a method of total indoor rearing has been done. In this context, the estimation of free amino acids, excretory products- urea and uric acid were compared during the fourth and fifth instars of tasar silkworm, reared under outdoor and indoor conditions. The study has revealed that amino acids decreased in the fat body in outdoor and indoor reared larvae in contrast to that in the haemolymph where it has gradually increased from first to third crops. This is an important finding as it reveals that indoor worms seem? to adopt proteolytic activity in the haemolymph. Secondly, in the fifth instar the excretory products are more compared to fourth instar in the indoor reared worms.? During fifth instar, formation of nitrogenous products lessens as silk synthesis enhances.? The present study reveals that decrease in uric acid in fifth instar implies increase in growth rate and silk synthesis in both outdoor and indoor worms. The findings of the present investigation is helpful in the conservation and protection of the A. mylitta, Andhra local ecorace.

Key words: ? Antheraea mylitta, Indoor rearing, Estimation, Amino acids, Urea and? uric acid

PDF of full length paper is available with author (*shamitha_gang@yahoo.com)

 

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