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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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    Abstract - Issue Sep 2020, 41 (5)                                     Back


nstantaneous and historical temperature effects on a-pinene

Effect of thyroxine hormone towards growth and survival of climbing perch (Anabas testudineus, Bloch) larvae

 

A.N. Alang1, Z. Hassan1, A. Christianus1,2 and Z. Zulperi1,2*  

1Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia

2Laboratory of Marine Biotechnology, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia

*Corresponding Author Email : zarirah@upm.edu.my

 

Paper received: 23.01.2020 ?????? ???????????????????????????????????????Revised received: 16.03.2020 ???????????? ????????????????????????Accepted: 14.08.2020

 

 

Abstract

Aim: Climbing perch (Anabas testudineus) is a popular fish in Asian countries. However, the long culture period and slow growth of the species has made it unpopular among fish farmers. Thyroxine (T4) is a hormone that functions as a growth precursor in all mammals including teleosts. This research aimed to study the effect of T4 on growth and survival of climbing perch.

Methodology: Larvae of climbing perch were used to perform the experiment at different frequencies of T4 treatments (Group 1: 1X0.5 ppm T4; Group 2: 2X0.5 ppm T4; Group 3: 3X0.5 ppm T4 and Group 4: control, 0 ppm T4), by using immersion technique for 30 min. Treatments were performed once a week for three continuous weeks.? ?

Results: The highest survival of larvae was recorded from Group 2 (66.7%) as compared to control group (52.5%). The length and weight of fish treated with T4 showed significant increment (p<0.05), while the best results were recorded at week 7 from Group 2 (length: 41.75 cm, weight: 1.47 g) compared to control group (length: 33.46?0.93 cm, weight: 0.71 g), respectively. ??

Interpretation: The use of T4 at a specific dosage (0.5 ppm) at two-time treatment was sufficient to increase the growth rate of climbing perch larvae, thereby reducing the cost of hatchery time to reach the market size. 

Key words : Anabas testudineus, Climbing perch, Hormone, Thyroxine

 

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