Pesque-solte: pesca repetitiva, variáveis hematológicas e parasitismo no peixe híbrido tambacu

The objective of this work was to evaluate the hematological and parasitological responses of tambacu (Colossoma macropomum x Piaractus mesopotamicus) subjected to catch-and-release stress and to different stocking densities in a catch-and-release system. Two hundred and ten fish with mean initial weight of 785.33±152.02 g and mean total length of 34.43±2.21 cm were maintained in ponds and divided into three groups: without fishing and low density (G1), with fishing and low density (G2), and with fishing and high density (G3). No significant differences were observed between the mean values for hemoglobin concentration, erythrocyte number, differential counting of leukocytes, and glucose. The fish from the G3 group showed higher parasite and thrombocyte numbers, and lower weight gain and hematocrit. The activity of catch-and-release, associated with high stocking density, can disrupt organic balance and animal performance, favoring parasitosis.

Escolha entre isolar-se ou interagir socialmente reduz estresse na tilápia-do-Nilo

Pós-graduação em Aquicultura - FCAV

Sonoridades beckettianas: a criação vocal do intérprete

Pós-graduação em Artes - IA

Construção de conhecimento em governança corporativa: estudo sobre a criação de valor para tomada de decisão de investidores no mercado de capitais

Pós-graduação em Ciência da Informação - FFC

Resposta imune de tilápias do Nilo (Oreochromis niloticus) vacinadas contra Streptococcus agalactiae

Pós-graduação em Medicina Veterinária - FCAV

Avaliação da temperatura ambiente de criação e da reutilização da cama no desempenho e na qualidade da carne de frango

Pós-graduação em Zootecnia - FCAV

Criação, proteção e uso legal de informação em ambientes da World Wide Web

Um número cada vez maior de produtores de conteúdo informacional, embora de acordo com os padrões culturais prevalecentes nem sempre seja considerado qualitativamente favorável, evidencia uma nova configuração cultural exponencialmente representativa no fluxo da informação em que o indivíduo, que não há muito tempo era um mero consumidor de conteúdo intelectual, é agora também um participante ativo na criação desses conteúdos. Os indivíduos que lidam com essas novas formas de produzir, disseminar e usar conteúdos informacionais devem estar conscientes das diferenças que se impõem quando a informação é digital. Eles devem conhecer as implicações quanto ao fluxo da informação e seus aspectos simbólicos, bem como saber sob quais condições a lei de direitos autorais estabelece que essas práticas devam acontecer.

Degradation, residual determination, and cholinesterase activity of triclorfon in Piaractus mesopotamicus Holmberg (Pacu) 1887

The aim of this study was to determine the no-observable-adverse-effect concentration (NOAEC) for trichlorfon, an antiparasitic agent used in aquaculture, in Piractus mesopotamicus (pacu) using acetylcholinesterase (AChE) activity as an end point. Fish were exposed 24 h/d for 15 d to different concentrations of trichlorfon in tanks of water for which a curve of dissipation was previously determined. Analysis of trichlorfon in water and fish plasma using gas chromatography with electron capture detection (GC-ECD) enabled measurement of limit of detection (LOD) and limit of quantification (LOQ), respectively, to be 3 and 10 ppb. Thirty-six hours after trichlorfon dilution in water, the concentration was below the LOD, and data showed that plasma concentrations did not exceed the LOQ. Apart from the 6.25 g/L, all concentrations of trichlorfon significantly inhibited plasma and brain AChE activity compared to controls. The AChE activity levels returned to control values in 7 d. These data may be useful to determine the concentration of trichlorfon that destroys parasites without producing adverse effects in fish.

Análise econômica da criação de tambaqui em tanques-rede: estudo de caso em assentamento da reforma agrária

Aquaculture is a crucial source of income and livelihood for millions of people around the world. Most fish farms require technical knowledge expertise and qualified staff. This research was developed in Santa Felicidade Settlement Project Cocalzinho de Goias city - GO, where a substantial part of the settlers by INCRA are exploring subsistence farming activities. After meeting open to the 76 settler's families, those who joined the project received courses on intensive farming of tambaqui (Colossoma macropomum) in net cages. The production was an innovative technique, fully realized with the participatory labor of family members, without prejudice of the main activities. The economic analysis showed the return on invested capital in 7.5 years within the financial activity with 7.1% Internal Return Rate higher than the average interest rate market. The Net Cash Flow showed ability to fulfill financial obligations from the second year. The implementation of more productive cycles optimizes the workforce with increased operational efficiency. Diet alternatively produced with local ingredients can minimize the effects of critical variables of the project, since it does not affect productivity.

Predação de ovócitos de Piaractus mesopotamicus (pacu-caranha) por Macrobrachium amazonicum em condições laboratoriais

The preference of predation on oocytes of Piaractus mesopotamicus, commonly known as 'Pacucaranha', by the prawn Macrobrachium amazonicum, under laboratory conditions, was evaluated regarding to other food items. The prawns were collected with sieves, placed below the underwater vegetation, and maintained in aquarium (12 L each) at a density of 10 individuals/aquarium for acclimatization. Oocytes (O) of P. mesopotamicus were obtained from the disposal of artisanal fishery. Artificial feed (R), fish muscle (M), organic matter accumulated in roots of Salvinia sp. (S) and plant organic matter in decomposition (MV) items were used to compare the preference by M. amazonicum. In all experiments the average of the prawns preying oocytes were higher; significant differences were detected only when comparing O/P and O/M. The preference for oocytes may be due to the presence of yolk, which has a high nutritional value and easy assimilation, in contrast to others items, which resent certain rigidity. This prawn species is exotic on site and the results of this study shows a possible environmental impact on P. mesopotamicus in the region.

Rearing temperature induces changes in muscle growth and gene expression in juvenile pacu (Piaractus mesopotamicus)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Skeletal anomalies of pacu, piaractus mesopotamicus, larvae from a wild-caught broodstock

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Aspectos biológicos e técnica de criação do gorgulho-da-goiaba, Conotrachelus psidii marshall (Coleoptera: Curculionidae)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Fósforo na alimentação de pacus criados em tanques-rede

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Sistema orgânico de produção de pescado de água doce

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)