Influence of rearing tank colour on larval growth and survival of Asian catfish

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bekateen
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Influence of rearing tank colour on larval growth and survival of Asian catfish

Post by bekateen »

Ferosekhan, S., Sahoo, S. K., Radhakrishnan, K., Velmurugan, P., Shamna, N., Giri, S. S., & Pillai, B. R. (2020). Influence of rearing tank colour on Asian catfish, magur (Clarias magur) and pangas (Pangasius pangasius) larval growth and survival. Aquaculture, 521, 15 May 2020, 735080.

https://doi.org/10.1016/j.aquaculture.2020.735080
https://www.sciencedirect.com/science/a ... 8619333277

Highlights
  • Clarias magur and Pangasius pangasius are commercially important freshwater catfish species in Asia
  • In magur larvae, white background tank improved growth performance and black tank favoured higher survival rate.
  • In pangas larvae, increased growth rate was observed in black tank and higher survival rate was in green tank.
  • This study suggests that black tank for magur and green tank for pangas are recommended for the higher production of catfish larvae in hatchery.
Abstract
Larval growth and survival are significantly influenced by the various biotic and abiotic factors. Rearing tank background colour is one such factor affecting the larval production in finfish hatcheries. The present study evaluated the effect of five tank background colours (black, white, blue, green and red) on growth and survival of larvae of two commercially important freshwater catfish species, Clarias magur (magur) and Pangasius pangasius (pangas) in a completely randomized experimental design in triplicate. The larvae of magur (9.33 ± 0.15 mm; 3.85 ± 0.05 mg) and pangas (10.07 ± 0.27 mm; 3.31 ± 0.08 mg) were stocked at a density of 45 and 30 larvae per tank, respectively in 15 L tanks. Experimental duration was 28 days for both the species. The results revealed that the final weight, weight gain, daily weight gain, and specific growth rate (SGR) of larvae of magur were significantly (P < 0.05) higher in white background coloured tank whereas, pangas shown the best performance (P < 0.05) in black tank. Thermal growth coefficient (TGC) of magur and pangas were recorded significantly higher in white and black coloured tank, respectively. Larval survival was significantly (P < 0.05) higher in black (97.04 ± 1.96%; F(4, 10) = 2.95, P = 0.002) tank for magur and green tank (87.78 ± 4.84%; F(4, 10) = 8.28, P = 0.003) for pangas. Whereas green and black tank colour were significantly reduced the larval survival of magur and pangas, respectively. This study clearly indicates that tank background colour had a significant impact on the larval growth and survival in both the species studied. It was also noticed that the tank colour effect is species specific. The study thus showed that black background tank colour for magur and green tank for pangas are more suitable for the higher production of catfish larvae in hatchery.
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Re: Influence of rearing tank colour on larval growth and survival of Asian catfish

Post by Bas Pels »

One one hand interesting, but perhaps a bit hard to put into practise.

Or would it be a good idea to raise catfishfry in a multi colored tank, where the fry can choose the best colored spot?
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Re: Influence of rearing tank colour on larval growth and survival of Asian catfish

Post by dw1305 »

Hi all,
Bas Pels wrote:
Mon Feb 10, 2020 7:42 am
One one hand interesting, but perhaps a bit hard to put into practise.

Or would it be a good idea to raise catfishfry in a multi colored tank, where the fry can choose the best colored spot?
I'm not sure about that at all as a paper. I'd really like to see the raw data. @racoll's "spreadsheet of shame" (viewtopic.php?f=14&t=48778) comes to mind.

cheers Darrel

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Re: Influence of rearing tank colour on larval growth and survival of Asian catfish

Post by bekateen »

Yup
"So many catfishes, so little time... and space... and money." - I said this after visiting Pier Aquatics.
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