Potential Effect of Different Stocking Density Levels on Growth Performance and Survival of Climbing Perch, Anabas testudineus (Bloch, 1792)
Potential Effect of Different Stocking Density Levels on Growth Performance and Survival of Climbing Perch, Anabas testudineus (Bloch, 1792)
No Thumbnail Available
Date
2022-10-31
Authors
V. S. Yasmi
S. Shyama
Alphi Korath
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)Cochin
Abstract
Anabas testudineus (Bloch, 1792), the climbing perch,
popularly known as koi, is an obligate air breathing
fish, inhabiting fresh and brackish waters of
Southeast Asia. A study was conducted in 12
circular cement cisterns, each of 518-liter capacity,
to evaluate the effects of stocking density on growth
performance and survival of climbing perch (Anabas
testudineus). Stocking density is one of the key
variables influencing growth, survival and production
levels of a fish species. Four different stocking
densities of koi (treatments) were compared viz, 10
(T1), 20 (T2), 30 (T3) and 40 (T4) numbers/ 0.5 m3
volume of circular cistern. Each stocking density
was studied in triplicate. Formulated pellet feed of
20% protein content was fed twice daily at 5 % of
the body weight. Growth response and water
quality parameters of fish were monitored at
fortnightly intervals. The duration of the study was
four months. On termination of the study, the final
average weight in the four treatments were 73.34 g
in T1, 57.13 in T2, 42.20 g in T3 and 23.86 g in T4.
Growth in terms of average length (cm), length gain
(cm), average weight (g), weight gain (g), average
daily growth (% ADG), and specific growth rate
(% SGR) was higher in the first treatment (T1) as
compared to treatments, T2, T3 and T4. The higher
SGR % of 3.01 was recorded in treatment T1 and the
lowest of 2.05 in treatment T4. The best FCR of 1.83
was intreatment T1, while the poorest FCR of 5.98
was in treatment T4. The FCE % ranged from 54.61
in T1 to 16.70 in T4. Increasing the stocking density
could result in a stress condition, linked to social interaction, which in turn, leads to reduced food
intake, poor feed utilization and consequently poor
growth. The results revealed that stocking density
had a significant effect on growth performance of
climbing perch. Lower stocking densities of koi,
favored better growth and production.
Description
Keywords
Citation
Fishery Technology 59 (2022) : 238 - 244