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Comparison of growth, nutritional quality, and stress in Labeo rohita, cultured in In-pond raceway
system and earthen pond under different stocking densities

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1 Minahal Qandeel , Komal Wajeeha, Liaqat Razia, Fatima Shafaq
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* 1

1 Department of Zoology, Lahore College for Women University, 5400, Pakistan
* Corresponding author: Qandeel.minahal@lcwu.edu.pk

Abstract:

In-pond raceway system (IPRS) is being popular intensive culture production system in South Asia. This g
per day. The average feed conversion ratio (FCR) in both raceways and control ponds was similar (1. system
helps to achieve sustainability in aquaculture through production, waste management and efficient
utilization of land and water. As different species respond differently under high stocking density
conditions, the present study investigated its effects on the growth, production, and nutritional quality of
locally popular and economically important carp in the region. Fingerlings of labeo (Labeo rohita) (n =
8,500 per raceway) with an initial weight of 250.00±10.25 g were stocked in two IPRS raceways (area of
each raceway = 220 m ) in June. The total grow-out period was 171 days and fish were harvested in
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November. Two earthen ponds were used as replicate for control group (area of control pond = 6,167 m )
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as control group (n = 3,500 in each pond, initial weight = 250.00±10.25 g). Mean biomass at harvesting
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from raceways was 41.70 kg/m (P ˂ 0.05). The average daily weight gain per fish was 4.85 g per day.
Conversely, the average harvested biomass (0.62 kg/m ) from control ponds was lower (P ˂ 0.05) with an
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average daily weight gain per fish of 4.94 90) (P ˂ 0.05). The survival rate was above 99 % in both groups.
No sign of any disease appeared during the entire trial period in both study groups. Crude protein and fats
contents remain unaffected despite high stocking density and sharp seasonal changes. Amino acids profile
(both essential and non-essential) was not less than international standards of adult humans. High levels of
n-3 and n-6 fatty acids at high stocking density when compared to those in the earthen pond, show unaltered
muscle quality even in a confined area.

Keywords: In-pond raceway, Labeo, High stocking density, Growth, Nutritional quality