Effects of environmental light colors on the larviculture of the Amazon River prawn Macrobrachium amazonicum
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This study aimed to investigate the effects of red, yellow, green, violet, blue, and white light in Macrobrachium amazonicum larviculture. The trials were composed of six treatments (i.e., colors red, yellow, green, blue, violet, and white light in tanks) with four replicates each. Transparent tanks of 1 L of water, 10 salinity, and 2400 newly hatched larvae were used in trials. The larvae were fed Artemia salina nauplii and complemented with commercial shrimp feed daily. The light color affected the temperature, pH, and dissolved oxygen in the water culture and nauplii consumption, survival, and productivity of M. amazonicum. In the tanks with red light, the mean temperature was lower, while the oxygen and pH levels were higher than those with other colors. The mean consumption of A. salina nauplii was 15% higher by M. amazonicum in tanks with blue and violet light than red light. No difference in larval development was observed; however, larvae cultured under white light completed the larval cycle four days earlier than those cultured under red light. The productivity of larvae cultivated under white and violet light was 45% greater than larvae cultured under red light, and the survival was > 75%. Results indicated that M. amazonicum larval cultivation should be performed in tanks under bright light, preferably white, since other colors may negatively affect the larval development.
KeywordsLarval cycle Light Macrobrachium amazonicum Productivity Survival
The authors thanks to Elane Tavares Lobo, Evandro Freitas dos Santos, Osiel Amoras de Araújo junior, Sting Silva Duarte, and Tainá Martins de Carvalho for their help in this study.
This work was supported by the Fundação de Amparo à Pesquisa do Estado do Amapá/FAPEAP, Brazil (#250.203/058/2014) and by the Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq (# 444367/2014-4). Tavares-Dias M. was granted a Research Productivity fellowship (# 303013/2015-0) from the Conselho Nacional de Pesquisa e Desenvolvimento Tecnológico (CNPq, Brazil).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
This study was conducted following the principles adopted by the Brazilian College of Animal Experimentation (COBEA).
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