Substituição da farinha de peixe por farinha de vísceras de aves na alimentação do piavuçu Leporinus macrocephalus

The present study aimed at evaluating the productive performance of Leporinus macrocephalus fed with different levels of inclusion of poultry viscera meal replacing fish meal. The experiment was conducted in a stove located in the Universidade Estadual do Oeste do Paraná during 45 days. We used 200 fish with average initial length of 4.7 ± 0.37 cm and average initial weight of 1.407 ± 0.03 g, distributed in 20 net-cages. The experimental design was randomized with five treatments and five replicates with five levels of replacement of fish meal by poultry viscera meal (0, 25, 50, 75, 100%). The parameters evaluated were the productive performance and the chemical composition of animals. The inclusion of poultry viscera meal in the substitution of fish meal in the feeding of Leporinus macrocephalus can be used without impairing the performance of the animals.

Community ecology of metazoan parasites of the sairú Cyphocharax nagelii from the Peixe River

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

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.

Variáveis hematológicas em tambaquis anestesiados com óleo de cravo e benzocaína

The objective of this work was to evaluate the anesthetic effect of clove oil and benzocaine on the hematology and osmotic fragility of erythrocytes in tambaqui (Colossoma macropomum). Thirty adult fish were evaluated in three treatments: a control, without anesthetic; anesthesia with clove oil at 50 mg L-1; and anesthesia with benzocaine at 100 mg L-1. Blood was collected for hemogram determination, and a test for the erithrocyte osmotic-fragility was applied. The utilized doses of clove oil and benzocaine are not appropriate for hematologic studies to establish reference values for tambaqui because they cause significant changes of the hematologic parameters, such as leukocytosis and iatrogenic hemolysis.

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.

Differential Expression of Myogenic Regulatory Factor Genes in the Skeletal Muscles of Tambaqui Colossoma macropomum (Cuvier 1818) from Amazonian Black and Clear Water

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

Utilização de composto orgânico de peixe em adubação de capim-marandu

Pós-graduação em Zootecnia - FCAV

Estudo da vazão específica nas bacias hidrográficas dos rios Aguapeí e Peixe como subsídio à gestão dos recursos hídricos

A área de estudo deste trabalho engloba as bacias hidrográficas dos rios Aguapeí e Peixe, localizadas a Oeste do Estado de São Paulo. Estas por sua vez estão vinculadas aos Comitês de Bacias Hidrográficas Aguapeí e Peixe (CBH-AP). Diante da iminência da implementação da política de cobrança pelo uso dos recursos hídricos nessa área, o presente trabalho apresenta em linhas gerais o estudo da vazão específica de forma que os resultados possam contribuir com os órgãos públicos de gestão a fim de que se execute uma gestão mais efetiva dos recursos hídricos. Com base em dados hidrológicos das estações fluviométricas inventariadas através do Sistema Integrado de Gestão de Recursos Hídricos do Estado de São Paulo (SIGRH) e da Agência Nacional de Águas (ANA) nas duas bacias hidrográficas, procedeu-se o estudo da vazão específica. Os resultados desses estudos apontam para uma maior variabilidade da vazão específica média na bacia hidrográfica do rio do Peixe, uma vez que ao longo da série histórica essa bacia apresenta maiores valores de vazão, foi possível também observar as mudanças no comportamento da vazão hidrológica nas duas bacias hidrográficas, ou seja, através dos três períodos hidrológicos identificados foi possível depreender que a vazão específica média em um período se mostra bem distribuída em ambas as bacias hidrográficas, em outro período hidrológico essa distribuição já se apresenta mais desigual. Tais informações possibilitam aos órgãos de gestão um planejamento mais refinado e eficiente

Estudo dos mixozoários (Myxozoa : Myxosporea) parasitos dos peixes characiformes Acestrorhynchus lacustris (Lütken, 1875) e Steindachnerina insculpta (Fernández-Yépez, 1948) coletados no Rio do Peixe, médio Rio Tietê, SP, Brasil

The São Paulo State has as one of its main rivers the Tietê, which is an extremely important source because of its biodiversity, use in navigation and mainly as direct supplier of water for thousands of people in the region. Currently, the biodiversity of marine and freshwater ecosystems has been threatened, primarily by environmental problems resulting from the degradation of ecosystems, an example is the stretch of the Middle Tietê River, where the Barra Bonita dam (SP) focused virtually the whole load organic effluents from the metropolitan region of São Paulo, leading to eutrophication with the loss of water quality. This basin is located in the Peixe’s River, a tributary of the Barra Bonita whose sources are on the slopes of the Cuesta de Botucatu, presenting an altitudinal gradient in a good state of conservation and water quality. From another perspective, the studies related to parasites and other pathogens of aquatic organisms have considerably increased the relevance, especially those hosts with potential for growing and marketing, given the significant increase these activities in Brazil and worldwide. Among the agents responsible for diseases in fish are the myxosporean, which can cause major economic damage, with high mortality ratios. Based on the above, this study evaluated the biodiversity of myxosporean parasites of two species of fish Acestrorhynchus lacustris and Steindachnerina insculpta. During the period January to November 2012, 40 specimens of Acestrorhynchus lacustris and 33 specimens of Steindachnerina insculpta were collected from the Peoxe’s river at four different points. The necropsies were performed and all organs were analyzed looking for myxosporean. Only the species Steindachnerina insculpta had their gills parasitized by two species of the genus Henneguya

Dinâmica hidrossedimentológica nos Rios Aguapeí e Peixe, Oeste Paulista

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

As vazões de outorga das bacias hidrográficas dos rios Aguapeí e Peixe

This work presents procedures for getting data to estimate grant flow by means of statistical and hydrological methods, acquired during the graduate course, of some streams in the watersheds of Aguapeí and Peixe rivers, in order to make available this data set to Sao Paulo State water and electrical energy department – DAEE and to the Committees of Aguapeí and Peixe watersheds. This study was performed using discharge data and the were a selection process to identify some faults in the historical series. Finally it was calculated the 7-day moving averages, Q7 and some characteristics discharges like Q90 and Q95. Taking into account the average discharge en seven days in a 10-year recurrence interval, it was estimated the grant flow of some streams. Data were generated for six posts inside the Aguapei and Peixe watersheds

Análises morfológicas dos mixozoários (MYXOZOA) parasitos presentes em tecido nervoso de peixes coletados no Rio do Peixe, médio Rio Tietê, SP, Brasil

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

Atualizações sobre o uso de óleo de peixe no tratamento de cardiopatia canina

There are cardiopathies that acometem the dogs, being able this being congenital or acquired and lately have grown the number of cases due to the increase of the life expectancy of these animals becoming each time more necessary prevention methods. In recent years innumerable research is being carried through to understand the influence of the fish oil in the cardiopathies. The fish oil ingestion, Omega 3, has shown beneficial effect in the prevention of cardiovascular illnesses in such a way in the men as in the animals. Such effect this related to the presence of acid greasy polyunsaturateds n-3, mainly acid the eicosapentaenóico (EPA) and acid the docosahexaenóico (DHA). These substances can be found in foods as marine cold water fish (salmon, tuna, sardine and Trout), hemp seeds and soy. The present study, therefore, it has as objective to carry through an update on the use of the fish oil in the treatment of cardiopathies in dogs

Análise espaço-temporal do escoamento fluvial nas bacias hidrográficas dos rios Aguapeí e Peixe, Oeste Paulista, Brasil

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

Characterization of the commercial fish production landed at Manaus, Amazonas State, Brazil

The present work aims to update a series of information about the regional fishing production, by presenting and characterizing the contribution of the different sub-systems of the Amazon basin to the catch landed at the main fishing market of Manaus, Brazil, from 1994 to 1996. Collectors specifically hired for this function registered key information on the fisheries. Thirty nine types or groups of fish were found in the fishing production landed. Jaraqui (Semaprochilodus spp.), curimatã (Prochilodus nigricans), pacu (Myleinae), matrinchã (Brycon cephalus), sardine (Triportheus spp.), aracu (Anostomidae) and tambaqui (Colossoma macropomum) were the most important items during three consecutive years. In 1994 these items summed up 91.6% of the total production; in 1995 and 1996 these values were, respectively, 85.3% and 86.4% of the total production. Tambaqui landed decreased remarkably during the period 1976-1996. There was a strong seasonal component in the production of the main species; jaraqui and matrinchã were mostly landed between April and June, while curimatã, pacu, and sardine were mostly landed during the dry season. Other important items showed a strong inter-annual variation in their production. The fishing production landed came mostly from the sub-system of the Purus River (around 30% of the total production). The subsystem of the Medium-Solimões contributed with an average of 15% and the sub-systems of the Madeira, Lower-Solimões, Upper-Amazon and Juruá, together contributed with 11.5% of the total production landed. Finally, the remaining sub-systems contributed with only 7.6% of the production.