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INTERNATIONAL JOURNAL OF SCIENTIFIC DEVELOPMENT AND RESEARCH International Peer Reviewed & Refereed Journals, Open Access Journal ISSN Approved Journal No: 2455-2631 | Impact factor: 8.15 | ESTD Year: 2016 open access , Peer-reviewed, and Refereed Journals, Impact factor 8.15 |
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| Paper Title: | Effect of thyroxine on larval survival, growth and morphology in Betta splendens |
| Authors Name: | Y.S.SANTHI PON INDIRA , L.ROSELIN RAJATHI |
| Unique Id: | IJSDR2307164 |
| Published In: | Volume 8 Issue 7, July-2023 |
| Abstract: | 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 |
| Keywords: | Keywords : Thyroxine, larval survival, growth, melanophores, airbladder, B. splendens |
| Cite Article: | "Effect of thyroxine on larval survival, growth and morphology in Betta splendens", International Journal of Science & Engineering Development Research (www.ijsdr.org), ISSN:2455-2631, Vol.8, Issue 7, page no.1111 - 1119, July-2023, Available :http://www.ijsdr.org/papers/IJSDR2307164.pdf |
| Downloads: | 000338536 |
| Publication Details: | Published Paper ID: IJSDR2307164 Registration ID:207886 Published In: Volume 8 Issue 7, July-2023 DOI (Digital Object Identifier): Page No: 1111 - 1119 Publisher: IJSDR | www.ijsdr.org ISSN Number: 2455-2631 |
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