Effect of thyroxine on larval survival, growth and morphology in Betta splendens
Y.S.SANTHI PON INDIRA
, L.ROSELIN RAJATHI
Keywords : Thyroxine, larval survival, growth, melanophores, airbladder, B. splendens
Effect of different levels of thyroxine on larval growth (Eltroxine (Glaxo) 0.1mg) such as 0, 0.001, 0.005, 0.01, 0.02 and 0.04 ppm on larval survival, growth and morphology were study by thyroxine immersion method. Thyroxine levels increased the larval development, morphometry and growth of B. splendens increased in fry reared upto 0.005 ppm T4 and thereafter they significantly (P < 0.05) declined. Air bladder began to develop on day 14 in all treatments and the length of the air bladder was high (0.624 mm) in fry reared with 0.01 ppm T4 as compared to other treatments. Intensity and appearance of melanophores in the body surfaces (head, trunk, caudal fin and dorsal fins) were related to time and T4 concentrations. The skin of fry was transparent upto 14 days in fry reared in controland0.001 ppm T4 and transparent nature became opaque and moreopaque related to T4 concentrations and time. Thyroxine influenced the growth parameters (mean body weight and length) in B. splendens fry. Based on the present study, it is observed that, 0.01 ppm was to maximize the melanophore formation, air bladder development food utilization parameter and growth in B. splendens fry. Keywords : Thyroxine, larval survival, growth, melanophores, airbladder, B. splendens
"Effect of thyroxine on larval survival, growth and morphology in Betta splendens", IJSDR - International Journal of Scientific Development and Research (www.IJSDR.org), ISSN:2455-2631, Vol.8, Issue 7, page no.1111 - 1119, July-2023, Available :https://ijsdr.org/papers/IJSDR2307164.pdf
Volume 8
Issue 7,
July-2023
Pages : 1111 - 1119
Paper Reg. ID: IJSDR_207886
Published Paper Id: IJSDR2307164
Downloads: 000347278
Research Area: Biological Science
Country: thoothukudi, tamilnadu, India
ISSN: 2455-2631 | IMPACT FACTOR: 9.15 Calculated By Google Scholar | ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 9.15 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator
Publisher: IJSDR(IJ Publication) Janvi Wave
