Navegando por Orientadores "FUJIMOTO, Rodrigo Yudi"

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Acesso aberto (Open Access)
Caracterização do sistema produtivo da aquicultura da microrregião de Cametá – Pará
(Universidade Federal do Pará, 2013) FERREIRA, Palmira Francisca Gonçalves; FUJIMOTO, Rodrigo Yudi; http://lattes.cnpq.br/9538142371454660
This research is aimed to present a diagnosis of aquaculture activity in the micro region of Cametá - Pará, emphasizing the factors that influence the development of activity and the level of competitiveness through the Competitive Performance Index (CPI) in order to provide indicators that can facilitate decision making in the areas of promoting aquaculture establishment as an economic activity. Data collection was performed by using questionnaires that sought to investigate the aspects relevant to productive activity. The data was processed and analyzed using the statistical SPSS software, version 13. This software made it possible to obtain a reduced linear structure of the original data set, through the summarization of the information contained in the variables creating smaller variable sets lalled factors, to identify the Competitive Performance Index (CPI) with respect to the variables studied. The results showed that 70.50% of the region's farmers have a primary education and only 1.44% attended or initiated higher education. 91,37% of the employees are members of the farm owners family. The average area intended for cultivation was 500 m2. The largest was found in Oeiras do Pará, which is also the largest municipality in area. The means of production include the creation of ponds in lowland areas (78.05%), in net-cage 13,3% and conventional production system with 8,65%. The prevalent mode of cultivation is the monoculture, especially the round fish tambaqui and tambacu (54%). Factor analysis extracted four factors representative of the development in the region: the productive system dimension, which explained about 27% of the total variance; commercial dimension, accounting for 15.15%; efficiencydimension explained 13.3% of the total and work dimension that explained 12.5% of the total variance. These factors influence the development of activity and should direct the actions of rural entrepreneurs and policy with the aim of improving fish farms so that they can boost production and meet growing demands for food quality.
Acesso aberto (Open Access)
Hematologia como ferramenta no monitoramento do "status" da cadeia produtiva de oito espécies de Acaris ornamentais (Loricariidae) do médio Rio Guamá, estado do Pará
(Universidade Federal do Pará, 2011-02-28) NEVES, Mikaelle de Souza; FUJIMOTO, Rodrigo Yudi; http://lattes.cnpq.br/9538142371454660
The present study monitored the health of eight species of ornamental plecos (acaris) captured and marketed in the Guamá River Middle - Pará, through the establishment of the hematological baseline value, evaluation of transport stress and infestation by Trypanosoma spp. The ornamental plecos were: ancistrus (Ancistrus sp. - L338), loricaia (Rineloricaia lanceolata - L10), picoto (Hypostomus sp. - L28), bola (Peckoltia oligospila - L06) pleco (CochiIodon sp. - L145), canoa (Lasiancistrus saetiger - L323), assacu (Pseudacanthicus spinosus - L160) and pinima (Leporacanthicus galaxias - L07).The blood collections for determination of hematological baseline (Chapters I and II) were realized at the site of capture fish, under the least stress as possible. Blood samples uninfected were separated to enable comparisons with the others after the transport stress (Chapters III and IV) and also with fish infected by Trypanosoma spp. (Chapter V). The transport stress lasted 3h, in density 1,5 fish/L, simulating the marketing process the fish in the region and was avalued et 0, 6, 24, 48, 72 and 96h after stress. In Chapter I and II, the hematological baseline showed significant difference (p> 0.05) among the seven species of plecos although they belong to the same family and share similar ecological niches. The transport stress for 3h (Chapters III and IV) not compromise the health of plecos, since most of the hematological parameters returned to baseline within 24h for the bola, 48h for the pleco and 72h for the picoto, being respectively, the minimum time indicated by the results of these fish to maintained before a new trade. The all eight plecos species studied were infected by Trypanosoma spp. (Chapter V). Normocytic-hypochromic anemia was observed in ancistrus and canoa, and hypochromic-macrocytic anemia in loricaia. In infected pinima showed under stress with lymphocytopenia, neutrophilia and monocytosis. Therefore, the results of this test provided an assessment of the healthiness of these species of ornamental plecos through the haematological examinations, thereby subsidize the development or adequacy of management less stressful for these plecos in order to assist the sustainability of ornamental plecos extractive chain.
Acesso aberto (Open Access)
Peixes ornamentais do rio xingu: manutenção e reprodução do Acari zebra Hypancistrus zebra Isbrücker & Nijssen, 1991 (Siluriformes, Loricariidae) em cativeiro
(Universidade Federal do Pará, 2016-04-29) RAMOS, Fabrício Menezes; CORDEIRO, Carlos Alberto Martins; http://lattes.cnpq.br/5010139685215361; FUJIMOTO, Rodrigo Yudi; http://lattes.cnpq.br/9538142371454660
The Hypancistrus zebra is an endangered species, but remains illegally captured and sold in the Middle Xingu region, mainly due to lack of creating technology that enable its creation in captivity and reduce the exploitation of natural stocks. Thus, the main objective of this work is to generate maintenance protocols and reproduction of zebra pleco, Hypancistrus zebra in captivity. Therefore, we obtained 300 copies of acari zebra according to SISBIO authorization No. 38215-2 and ethics committee animal No 03.14.00.017.00.00. This study was divided into four chapters, the first being related to conduct an inventory of the species of the Xingu River to select the priority species for the development of farming technologies; Evaluate the acceptability of different food and shelter in maintaining zebra pleco maintained in the laboratory; To evaluate various conditions for inducing playback zebra pleco in tanks and; Evaluate feeding management for fry of F1 generation Hypancistrus zebra. Based on the array were chosen five species of the family Loricariidae (Hypancistrus zebra, Hypancistrus sp.2, Baryancistrus xanthelus, Scobinancistrus sp.3 and Ancistrus sp.4), one species to Potamotrygonidae (Potamotrygon leopoldii) and two species of cichlid (Creniciclha regani and Teleociclha spp.). With respect to the preference for shelters acari zebra time spent in shelters was higher in clay shelters (276 ± 51 day min-1) followed by the stone shelter (198 ± 96 day min-1), outside the shelter (134 ± 15 day min-1), and PVC under (70 ± 52 day min-1). The preference for food the sort order of preference of the food was higher for Artemia sp. followed by food fish, shrimp and mussels. But when the fish fed with Artemia sp. or mix food, they had higher final weight, final length and weight gain compared to single foods with shrimp and fish. Regarding the frequency and feed rate, there was no interaction between the rate and the supply frequency and the frequency 2:03 daily feeds and feed rate of 10% day-1 body weight promote better results of production performance. It was also observed that the best storage density is 2.00 g L-1 to provide the best specific growth rate. Regarding reproduction were observed five spawns from different couples, and 3 to 1 male and 2 females. The biggest male is the dominant territorialist and have parental care. average position of 13.8 ± 6.72 eggs, diameter of 4.4 ± 0.12, volume 41.4 mm3 volume and calf 34.3 mm3. The outbreak is 7 days post fertilization (PF) and PF 17 days the yolk sac has been absorbed. The different values tested for electrical conductivity in the water and hormonal treatments were not enough to promote spawns in acari zebras. Performance figures in fingerlings acari zebra remained similar between the treatments. It follows therefore, that the zebra pleco is the kind of priority Xingu river in technology development. The use of ceramic refuges is the most suitable in Hypancistrus zebra. The zebra pleco should be cultivated at a density of 2 g L-1, and its power is not random, with preference for brine shrimp, which must be distributed in 10% day-1 body weight in 2 daily feedings. In addition to complementary food brine shrimp can be combined to provide similar performance. Captive breeding is however possible new techniques that facilitate the scheduling of reproduction should be evaluated. Furthermore, due to the short larval stage and with great reserve yolk sac, promote healthier fry and being resistant to feed frequency not directly influence on performance.
Acesso aberto (Open Access)
Perfil da piscicultura na mesorregião sudoeste Paraense
(Universidade Federal do Pará, 2011) OLIVEIRA, Adna Suany Cardoso de; FUJIMOTO, Rodrigo Yudi; http://lattes.cnpq.br/9538142371454660
This research aimed at characterizing the recent development of fish farming in southwestern Pará state in the Brazilian Amazon and how this economic activity is organized. Site visits were made to fish farms in the municipalities of Altamira, Brasil Novo, Medicilândia, Uruará, Vitória do Xingu, Itaituba, Aveiro, Jacareacanga, Novo Progresso, Rurópolis e Trairão. Data were obtained through the application of questionnaires with questions pertaining to characteristics of the production system and marketing. The sample included 143 fish farms, of which 65.9% practiced a semi-intensive system and 31.7% an extensive system. The employed labor force is drawn mostly from the immediate family. Fish farming is a complementary activity in 81% of the farms visited. The management of fish farms consists of several basic operations, such as rearing in ponds with locally produced feed (82%) and commercial fish ration (47.7%). The most commonly cultivated species are round fish (13%) as the preferred first cultivated species and tilapia (18%) as second choice. The average yearly yield was 8209 kg/ha for round fish and 3727 kg / ha for tilapia. The average yield of all species reached 14,339 tons/ha. The principle difficulties encountered by regional fish farmers are: lack of technical assistance, obtaining fingerlings, high feed prices, and lack of production incentives.
Acesso aberto (Open Access)
Reprodução, treinamento alimentar e larvicultura do peixe folha, Monocirrhus polyacanthus (Heckel, 1840) (Polycentridae, perciformes) em laboratório
(Universidade Federal do Pará, 2011-11-30) RAMOS, Fabrício Menezes; FUJIMOTO, Rodrigo Yudi; http://lattes.cnpq.br/9538142371454660
The leaf fish is present throughout the Amazon basin, and is often exploited by the trade of ornamental fish. There is a decrease of its stock due to fishing ornamental. There is a paucity of information so that they would be useful for cultivation and may promote the social inclusion of Amazon ornamental fishing and extractive fishing decreased. As it is, in general, very difficult to obtain this information by making direct observations in nature, an alternative is to conduct such a study through controlled experiments in the laboratory. So this study aimed to generate information about reproduction, training and hatchery feeding, using different conductivity and breeding and spawning substrate, different forms of replacement of live food for the inert different concentrations in different live food fish stocking density sheet as well as subjecting these substances to prophylactic said. Thus it was possible to know that the use of low conductivity water (reverse osmosis) has an important role in the reproduction of the fish studied. I use frozen fish larvae as food in an inert piece of fish meal feeding provides the best rates for gains in weight and length when compared to other foods tested. What type of food provided to fish larvae sheet, regardless of stocking density in this period of development, affected the growth performance without affecting the quality parameters of water, and live food, Moina minuta, presented better results gain weight, growth, relative condition factor and survival. And that the aqueous extract of Terminalia catappa and methylene blue are the most studied substances recommended for larviculture of this species. Although the use of salt for 5 days may also be recommended.