Effect of rearing containers colour on metamorphosis and survival of larvae of Macrobrachium rosenbergii (De Man 1879)

Belsare S. S., . and Shelke S. T., . and Indulkar S. T., . Effect of rearing containers colour on metamorphosis and survival of larvae of Macrobrachium rosenbergii (De Man 1879). pp. 25-34. ISSN 0116-6514

Macrobrachium rosenbergii larvae (IV stage) were reared in tubs having different colours viz white red blue dark-violet grey and green. The time required for the appearance of first post-larvae was observed to be 37.3 32 29.5 27.5 34.0 and 35.8 days and the total amount of time required for obtaining post-larvae was 41.8 36.3 33 31.5 39.0 and 40.0 days in white (T1) red (T2) blue (T3) dark-violet (T4) grey (T5) and green (T6) colours respectively. Significantly less time was required for the metamorphosis of larvae to post-larvae in dark-violet tub as compared to other colours. However there was no significant difference in grey and green colour treatments. Significantly higher survival (61.38) was observed in dark-violet colored treatment followed by 57.88 in blue 51.63 in red 43.38 in grey 35.75 in green and 27.25 in white coloured tubs. The water parameters such as salinity temperature pH and dissolved oxygen were observed during the experimental period and were found to be within tolerance limit of M. rosenbergii zoeal larvae. Light-intensity in water varied in the range of 33.00 to 94.75 lux 25.75 to 80.50 lux and 20.00 to 68.00 lux at 11:00 15:00 and 18:00 hrs respectively in dark-violet blue red grey green and white colours. A significant difference (P0.05) in light-intensity was observed in various treatments. Significantly maximum lightintensity was recorded in white tub and minimum in dark-violet tub. Darker internal colour of rearing tubs significantly reduces the metamorphosis period and increases survival rate of larvae of M. rosenbergii.

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Abstract

Macrobrachium rosenbergii larvae (IV stage) were reared in tubs having different colours viz white red blue dark-violet grey and green. The time required for the appearance of first post-larvae was observed to be 37.3 32 29.5 27.5 34.0 and 35.8 days and the total amount of time required for obtaining post-larvae was 41.8 36.3 33 31.5 39.0 and 40.0 days in white (T1) red (T2) blue (T3) dark-violet (T4) grey (T5) and green (T6) colours respectively. Significantly less time was required for the metamorphosis of larvae to post-larvae in dark-violet tub as compared to other colours. However there was no significant difference in grey and green colour treatments. Significantly higher survival (61.38) was observed in dark-violet colored treatment followed by 57.88 in blue 51.63 in red 43.38 in grey 35.75 in green and 27.25 in white coloured tubs. The water parameters such as salinity temperature pH and dissolved oxygen were observed during the experimental period and were found to be within tolerance limit of M. rosenbergii zoeal larvae. Light-intensity in water varied in the range of 33.00 to 94.75 lux 25.75 to 80.50 lux and 20.00 to 68.00 lux at 11:00 15:00 and 18:00 hrs respectively in dark-violet blue red grey green and white colours. A significant difference (P0.05) in light-intensity was observed in various treatments. Significantly maximum lightintensity was recorded in white tub and minimum in dark-violet tub. Darker internal colour of rearing tubs significantly reduces the metamorphosis period and increases survival rate of larvae of M. rosenbergii.

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Item Type:	Article
AGROVOC Term:	Macrobrachium rosenbergii
AGROVOC Term:	Metamorphosis
AGROVOC Term:	Larvae
AGROVOC Term:	Survival
AGROVOC Term:	Salinity
AGROVOC Term:	Water temperature
AGROVOC Term:	Dissolved oxygen
AGROVOC Term:	Freshwater prawns and shrimps
AGROVOC Term:	Penaeus monodon
AGROVOC Term:	Rearing techniques
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23778

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