Acta Scientiarum. Animal Sciences 

About: Acta Scientiarum. Animal Sciences is an academic journal published by Editora da Universidade Estadual de Maringá (Eduem). The journal publishes majorly in the area(s): Dry matter & Feed conversion ratio. It has an ISSN identifier of 1806-2636. It is also open access. Over the lifetime, 1483 publications have been published receiving 10164 citations.

Recent studies on parasitic infections of freshwater cultivated fish in the state of Sao Paulo, Brazil

Abstract: The present work relates diagnosticated cases of fish diseases in the state of Sao Paulo, Brazil between January/1999 and December/2000. During 1999, the monogenean was the most important parasite (72.9%), followed by Piscinoodinium pillulare (43.2%), Henneguya piaractus (34.2%), Ichthyophthirius multifiliis (23.4%) and copepodids of Lernaea cyprinacea (9.0%). However, in 2000, monogenean showed 78.9%, trichodinids 52.1%, P. pillulare 35.7%, I. multifiliis 29.8% and L. cyprinacea 11.9%. The most infected fish was Piaractus mesopotamicus, followed by Leporinus macrocephalus, hybrid "tambacu" and Oreochromis niloticus. This work showed the highest susceptibility of "tambacu" and L. macrocephalus to P. pillulare and P. mesopotamicus to monogenean Anacanthorus penilabiatus. The authors emphasize the importance of prophylaxis in farmed-fish, as well as adequate transport and water quality. The regular accompaniment of fish health, strategic applications of sodium chloride in the water and vitamin C supplementation in the ration to avoid the unbalance of the host/parasite/environment system.

Some factors that affect ruminant meat quality: from the farm to the fork. Review

Abstract: Cada vez mais os consumidores estao interessados na qualidade dos produtos os quais eles consomem; especialmente com referencia a carne. O consumo de carne de ruminantes e de seus derivados esta aumentando de forma muito rapida, especialmente em alguns paises como o Brasil, que e o principal exportador de carne do mundo. Este trabalho revisa diferentes fatores que afetam a qualidade da carne de ruminantes, sobretudo sobre as analises sensoriais. Alguns fatores ao longo da cadeia da carne sao analisados: aqueles que poderiam ser considerados pelos produtores relacionados ao melhoramento da qualidade dos seus produtos e aqueles relacionados aos habitos e comportamento dos consumidores. A maior parte dos artigos cientificos revisados foi desenvolvida pelo Grupo de Qualidade e Tecnologia de Carnes (Universidade de Zaragoza e CITA da regiao de Aragon na Espanha) isoladamente ou em colaboracao com grupos locais e internacionais.

Desempenho do jundia, Rhamdia quelen, e do dourado, Salminus brasiliensis, em viveiros de terra na regiao sul do Brasil

Abstract: The present study aimed to evaluate the aquaculture potential in Southern Brazil for two species of freshwater fish: dourado, Salminus brasiliensis and jundia, Rhamdia quelen . Growth, feed conversion, growth differences between males and females, resistance to handling and survival rate were evaluated. Fingerlings of the two species were stocked in earthen ponds at two different locations in the State of Santa Catarina: Santo Amaro da Imperatriz (SA) and Sao Carlos (SC). Fish were fed commercial diets twice a day to apparent satiation. After 365 days (jundia) and 605 (dourado) days, jundia presented a daily weight gain (DWG) of 1.00 and 1.97g and feed conversion of 1.85 and 1.78 at SA and SC, respectively, whereas for dourado, the DWG was 0.46 and 0.51 and feed conversion was 3.52 and 3.82 at SA and SC, respectively. At SA, differences were detected between males and females for growth, condition factor and gonadosomatic index. Stocking density, pond size and sexual ratio are discussed for both species.

Uso de diferentes graus de moagem dos ingredientes em dietas para a tilápia-do-Nilo ( Oreochromis niloticus L.) na fase de crescimento

Abstract: The trial aimed to compare pelletized diets with different milling degrees (0.50 or 1.50mm) on the performance and food transit velocity rate (FTVR) of Nile tilapia during growth phase. Forty animals with mean initial weight of 68.95 ± 13.30 g and total length of 15.94 ± 1.06 cm, were distributed in a completely randomized design with two treatments and five replications in 500l concrete tanks. Significant differences (P < 0.05) were observed according to the mean values of final weight, final length, daily weight gain, feed intake and feed conversion, and the worst results were with diet of 1,50mm. There was no difference when using diets of 0.50 or 1.50mm on condition factor, carcass and fillet yields, and on visceral fat percentage of the fishes. The FTVR was faster for the 1.50mm treatment. It was concluded that the use of 0.50mm milling degree diet promoted the slowest food transit velocity and the best performance for Nile tilapia during growth phase.

Growth curves of Nile tilapia (Oreochromis niloticus) strains cultivated at different temperatures

Abstract: Growth of Red, GIFT and Supreme Nile tilapia strains were evaluated. Fish were cultivated in indoor recirculation systems in 0.5 m³ tanks with controlled temperatures of 22, 28 and 30°C. Random samples of 20 fish from each strain (10 fish tank -1 ) were weighed at day 7, 30, 60, 90 and 120. Exponential model (y=Ae Kx ) and Gompertz model (y = Aexp(-Be -Kx )) were fitted and the estimates parameters were obtained by Weighted Least Squares. At 22°C, Red, GIFT and Supreme strain presented similar growth and fit of exponential model. GIFT and Supreme strain presented higher growth rate at 30°C of cultivation when compared to Red strain. Temperature influences weight and age at the inflection point. The temperature of cultivation influences the growth description of Red, GIFT and Supreme tilapia strains. It changes the age and weight at inflection point and the qualities of growth model fits, changing the variation of the batch.