RESUMO
The aim of this work was to evaluate different transport times for pacama juvenile (Lophiosilurus alexandri) previously trained to feed formulated diets. Four hundred and eighty-six pacama juveniles (2.52±0.71g) were submitted to 24 hours of fasting before transport. The animals were divided into nine plastic bags, with density of 54 juveniles in 5L of clean water for each bag after that inflated with pure oxygen and then sealed. Fish were transported for three hours and bags were open at 5, 6 and 7.5 hours after closing. For each time three replications were used. Survival was monitored for 96 hours post-transport. The longest time tested showed the lowest values of dissolved oxygen and pH, while the total ammonia was similar in the different treatments. Survival was 100% for different transport times after 96 hours. Some juveniles returned to feed 48 hours and the majority 72 hours after opening the bags, suggesting the efficiency of transport made at different times.
Assuntos
Animais , Carnívoros , PeixesRESUMO
Although pacamã (Lophiosilurus alexandri), a fish species native to Brazil, is suitable for farming, it has been little investigated. The present experiment evaluates the effect of food processing on the performance and survival rate of pacamã fingerlings. An experiment in a completely randomized design was carried out with 48 pacamã fingerlings aged 45 days and weighing 1.94 ± 0.01 g. Fingerlings were assigned to three treatments with four repetitions. Each aquarium containing four fingerlings was considered one experimental unit. Fingerlings were submitted to feed treatments with 47.5% crude protein processed in bran, micro-pellet, and moist forms. The average final weight and apparent feed conversion were significantly (P<0.01) affected by food processing. Pacamã fingerlings that fed on moist food performed the best, such that moist food rather than bran or micro-pellet forms is recommended.
Embora o pacamã (Lophiosilurus alexandri), uma espécie de peixe nativa do Brasil, seja apropriado para o cultivo, pouco se conhece a seu respeito. O presente experimento avaliou o efeito do processamento da ração no desempenho e na sobrevivência de alevinos de pacamã. O desenho experimental foi completamente casualizado, com 48 alevinos de pacamã com 45 dias de idade e peso de 1,94 ± 0,01 g distribuídos em três tratamentos com quatro repetições. Cada aquário com quatro alevinos foi considerado uma unidade experimental. Os alevinos foram submetidos a tratamentos com rações contendo 47,5% de proteína bruta, processadas na forma farelada, micropeletizada e úmida. O peso final e a conversão alimentar aparente apresentaram efeito significativo (P<0,01) para o processamento da ração. Os alevinos de pacamã alimentados com ração na forma úmida apresentaram melhor desempenho. Desse modo, recomenda-se a ração na forma úmida em vez daquelas nas formas farelada e peletizada.
Aunque el pacamã (Lophiosilurus alexandri), una especie de pez nativo de Brasil, es apto para el cultivo, poco se sabe acerca del mismo. En este estudio se evaluó el efecto del procesamiento del pienso en el rendimiento y la supervivencia de los alevines de pacamã. El diseño experimental fue completamente casualizado, con 48 alevines de pacamã con 45 días de edad y peso de 1,94 ± 0,01 g distribuidos en tres tratamientos con cuatro repeticiones. Cada acuario con cuatro alevines se consideró una unidad experimental. Los alevines fueron sometidos a tratamientos con piensos conteniendo 47,5% de proteína bruta, procesadas como harina, micro peletizado y húmedo. El peso final y la conversión alimentaria mostró efecto significativo (P <0,01) para el procesamiento de la ración. Los alevines de pacamã alimentados con la forma húmeda mostraron mejor rendimiento. Por lo tanto, se recomienda pienso en la forma húmeda en lugar de las formas en harina y micro peletizado.