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This study investigated whether aquaculture facilities drive the introduction and establishment of the non-native Nile tilapia (Orechromis niloticus) in Neotropical streams, Brazil. Samples were taken from nine streams with different aquaculture occupation intensities (no, moderate, and intense) using the percentage of occupation of micro-watersheds by aquaculture ponds as a proxy for propagule pressure. The presence of aquaculture facilities and the percentage of aquaculture occupation were good predictors of the catch frequency and of densities of tilapias in the adjacent natural environment. In the streams under intense propagule pressure, females prevailed and high densities of young individuals comparing to adults were recorded. It suggests that the species was reproductively successful in the natural environment. In the streams under moderate propagule pressure, males prevailed, which indicates the likely capture of individuals escaped from aquaculture facilities. In general, our results show the positive influence of propagule pressure on the introduction and establishment of Nile tilapia in natural ecosystems, showing that aquaculture expansion of O. niloticus poses a threat to the conservation of aquatic biodiversity.

The South America ichthyofauna encompasses the highest diversity of the world, however is highly threatened by anthropogenic actions. The fish fauna of nine low-order streams, tributaries of the Piquiri River and impacted by aquaculture, agriculture and urbanization were sampled in the present study. Samplings were done quarterly from December 2017 to September 2018 at three sites in each stream, using a portable electric fishing device in 50-meter segments. A total of 14,507 individuals were collected, belonging to six orders, 20 families, 46 genera, and 70 species. The highest richness and abundance were found for the orders Characiformes and Siluriformes. In this study, nine species that had not been recorded were found, totaling 163 for the basin. In addition, 14 non-native species were captured. The presented list of species contributes to the existing database of ichthyofauna distribution in Neotropical streams, denoting that it is underestimated in the region, mainly in low-order tributaries. The present study reinforces the importance of inventories and monitoring in environments with high biodiversity and sensitive to anthropogenic actions. Resumo A ictiofauna sul-americana abrange a maior diversidade do planeta, no entanto, encontra-se altamente ameaçada pela ação antrópica. Nesse estudo, a fauna de peixes de nove riachos de pequena ordem foi amostrada. Esses riachos são afluentes do Rio Piquiri e afetados pela atividade aquícola, agrícola e urbanização. As coletas foram realizadas trimestralmente de dezembro/2017 a setembro/2018 em três pontos amostrais de cada riacho, utilizando-se equipamento portátil de pesca elétrica em segmentos delimitados de 50 metros. Foram coletados 14.507 indivíduos, pertencentes a seis ordens, 20 famílias, 46 gêneros e 70 espécies. Os maiores valores de riqueza e de abundância foram obtidos nas ordens Characiformes e Siluriformes. Neste estudo, foram encontradas nove espécies ainda não registradas, totalizando 163 para a bacia. Além disso, 14 espécies não-nativas foram capturadas. Ressalta-se que a lista de espécies apresentada contribui com o banco de dados existente sobre os padrões de distribuição da ictiofauna em riachos Neotropicais e demonstra como a mesma ainda pode ser subestimada na região, principalmente em tributários de pequena ordem. Esse estudo reforça a importância de inventários e do monitoramento em ambientes altamente diversos e sensíveis à ação antrópica.

Made available in DSpace on 2020-12-12T01:44:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-03-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Financiadora de Estudos e Projetos The objective was to determine the median lethal concentration (LC50) of nitrate for post-larvae and juveniles of Macrobrachium amazonicum exposed for 96 h, and to identify histopathological alterations in the gills of juveniles exposed to nitrate. Post-larvae and juveniles of M. amazonicum were exposed to seven different concentrations of nitrate (0, 50, 100, 500, 1000, 1500 and 2000 mg.L−1) with four replicates (n = 10 prawn/experimental unit). The degree of damage to the branchial structure of juveniles was evaluated using standard histological processing with hematoxylin and eosin (H&E), subjected to the Organ Index (Iorg). LC50 values at 24, 48, 72 were estimated by the Trimmed Spearman Karber Method software and were respectively 1574, 638, 237, and 194 mg.L−1 for post-larvae and 1070, 286, 185 and 155 mg.L−1 for juveniles, respectively. From these results, the safety level of nitrate was estimated at 157, 64, 24 and 19 mg.L−1 for post-larvae and 107; 27; 18 and 16 mg.L−1 for juveniles, respectively for 24 h, 48 h, 72 h and 96 h. Damage to the gills in treatments with 100% mortality for nitrate corresponded to the high occurrence of progressive, regressive, circulatory and inflammatory damages. The other treatments, which caused lower mortality, mainly resulted in inflammation and regressive damage, whose occurrence increased with increasing concentration of nitrate. However, in closed systems, the use of anaerobic denitrifying filters or aquatic macrophytes is necessary to provide suitable water quality for the best productive performance, avoiding the negative influence of the accumulated nitrate. Laboratório de Carcinicultura Programa de Pós-graduação em Aquicultura e Desenvolvimento Sustentável Universidade Federal do Paraná, Setor Palotina Empresa LAQUA – Camarões UNESP - Universidade Estadual Paulista Centro de Aquicultura e Agência UNESP de Inovação, São Paulo UNESP - Universidade Estadual Paulista Centro de Aquicultura e Agência UNESP de Inovação, São Paulo

The objective of this study was to evaluate the chronic effect of different nitrate concentrations on the zootechnical performance and welfare of Macrobrachium amazonicum juvenile. A randomized bioassay was conducted over 28 days, with four treatments (0, 8, 16, and 32 mgL−1 N-NO3−) and four replicates. The prawns (0.52 ± 0.09 g) were stocked (n = 12 per experimental unit) in a semi-static system with daily renewal of 90% of the usable volume. At concentrations from 0 to 16 mgL−1 nitrate, average survival was above 80%, and total average biomass above 6 g; at 32 mgL−1 nitrate, average survival was 27%, and total average biomass 2 g. Nitrate concentration was significantly negatively correlated with mean total final length, mean final weight, specific growth rate, mean antenna length, and the gill condition by Organ Index. Reductions in growth rate of 34% and 45% were observed in the treatments of 16 mgL−1 and 32 mgL−1 nitrate, respectively. In the histological analysis of the gills, increasing nitrate concentration led to symptoms ranging from mild inflammatory processes to severe regressive and progressive damage, including necrosis, hyperplasia, and edema. We conclude that concentrations up to 8 mgL−1, over a 28-day exposure period, are acceptable for nursery stages in the intensive production of M. amazonicum.

O objetivo do estudo foi avaliar o desempenho zootécnico da tilápia do Nilo (Oreochromis niloticus) alimentado com ingredientes vegetais, complementado com enzima fitase granulada e líquida. Para realizar do estudo, utilizou-se 600 juvenis de tilápia do Nilo (peso inicial médio de 1,72 ± 2,21 g e comprimento inicial médio de 9,46 ± 0,64 cm) invertidos sexualmente para machos, durante 64 dias. O design experimental foi inteiramente casualizado com seis dietas: controle negativo (sem fosfato inorgânico e sem adição de fitase), controle positivo (com fosfato inorgânico), duas dietas (1500 e 3000 FTU/kg) com fitase granuladas e duas dietas (1500 e 3000 FTU/kg) com fitase líquida, com cinco repetições. As dietas foram isoenergéticas com 3100 kcal/kg e isoproteicas com 28% de proteína bruta. A fitase granulada foi adicionada antes e depois da extrusão e a fitase líquida adicionada após o processamento. A forma líquida de fitase forneceu o melhor desempenho e o melhor conteúdo protéico na carcaça. Também foi observado o mesmo quanto aos coeficientes de digestibilidade aparente de proteína e matéria mineral. A retenção de fósforo no plasma e nas vértebras não foi influenciada pelos tratamentos. Com os resultados concluiu-se que a adição de fitase na forma líquida é mais eficiente, podendo ser adicionadas nas dietas níveis mais baixos.

Biofloc system is an alternative to conventional aquaculture systems as it minimizes effluents, improves water quality, ensures greater biosafety due to minimal water exchanges and also serves as an additional food source for prawn. The present study aimed to evaluate the effect of suppression of vitamin and mineral supplements on diets for Macrobrachium rosenbergii reared in the biofloc system. Four experimental diets were evaluated: complete diet (Diet 1 with vitamin and mineral supplementation); diet without vitamin supplement (Diet 2); diet without mineral supplement (Diet 3) and diet without vitamin and mineral supplement (Diet 4). The experimental design was completely randomized with four replicates per treatment. After 45 days of trial survival rates above 90% and feed conversion rate ~1.83 were observed for all treatments, indicating that the production of M. rosenbergii in the biofloc system does not require the inclusion of vitamin and mineral supplementation in the feed.

The objective of the present work was to determine the influence of artificial substrates that increase the area for biofilm development on the production performance of Farfantepenaeus paulensis juveniles in pens. Shrimp were stocked at a density of 20/m2 in pen structures (bottom area = 50 m2) that were installed in the Patos Lagoon estuary. Two treatments with three repetitions were analyzed, where artificial substrates (polyethylene nets—1-mm mesh size) were added to increase the area for biofilm development by 100%, and where no substrates were added. During the experimental period, the biomass and the composition of the biofilm were assessed. After 86 days of rearing, no significant differences were found in shrimp performance between the treatments (p > 0.05). However, the examination of the chlorophyll a, dry weight, and composition of the biofilm indicated that the shrimp were actively consuming the biofilm attached to the artificial substrates. Significant decreases in the abundances of nematodes > 500 μm after the 56th day and of tintinnids and rotifers between day 28 and day 42, indicated that the shrimp were selectively predating on these organisms. Moreover, a decrease in the chlorophyll a concentration in the biofilm suggests that the shrimp were consuming the microalgae. Although the increase in the area for biofilm development did not improve shrimp performance, the shrimp presented the highest growth rates when they consumed most of the biofilm microorganisms.

Macrobrachium amazonicum is the native freshwater prawn species with the greatest potential for captive production in Brazil. The stable isotope carbon and nitrogen technique (δ 13 C and δ 15 N) is efficient to determine the contribution of different food sources to a given organism. We used this technique to estimate the contribution of the food sources in the biomass gain of M. amazonicum . Fish fillets were used to determine the isotopic fractionation between juveniles of M. amazonicum and a standard food source. Juvenile M. amazonicum were submitted to four treatments with different food availability to determine their contributions; T1: without soil substrate and with feed supply; T2: without soil substrate and feed supply; T3: with soil substrate, feed supply and addition of an aquatic macrophyte ( Elodea sp.); and, T4: with soil substrate, aquatic macrophytes and without feed supply. Periphyton, plankton and precipitated organic material were present in all treatments. The isotopic fractionation was 0.57 ± 0.07 (carbon) and 2.14 ± 0.18 (nitrogen). The prawn fed with ration presented growth 2.4 and 2.82 times higher in the treatments without substrate (T1) and with substrate and macrophytes (T3), respectively. The contribution of the food sources reinforces omnivore in prawn. The benthic organisms and feed supply were fundamental for the better growth performance of M. amazonicum . Estimating the effective contributions of food sources can help in developing diets more adequate for the species, increasing productivity, reducing costs and reducing the environmental impact of waste substances.

This study aimed to evaluate the combined effect of total ammonia and nitrite on Macrobrachium amazonicum juveniles exposed for 96 h. Juveniles (6.3 ± 0.7 cm and 1.79 ± 0.60 g; n = 640) were used in a completely randomized factorial design with four concentrations of total ammonia (0, 11, 22, and 44 mg.L−1) and four concentrations of nitrite (0, 1.5, 2.5, and 5 mg.L−1) with four replicates (n = 10) for each combination. Prawn gills were collected for histological evaluation and observation of damage to the organ (Iorg). The probit method was used to calculate the isolated LC50–96 h values for total ammonia and nitrite, the results indicated concentrations of 29.85 and 2.49 mg.L−1, respectively. The LC50–96 h of the combined compounds was 20.87 mg.L−1 for total ammonia and 2.95 mg.L−1 for nitrite. The isolated safety levels of total ammonia and nitrite were 2.98 and 0.25 mg.L−1, while for the combined treatments the safety level was 2.08 mg.L−1 for total ammonia and 0.29 mg.L−1 for nitrite. Calculating the sum of additivity and the additivity index of the mixture showed the effect of the combined compounds is 0.88 times lower than the sum of the isolated effects, thus an antagonistic effect. That is reinforced by histological analysis of gills, with reduced gill damage in the combined treatments. In conclusion, M. amazonicum showed greater tolerance to total ammonia and nitrite concentrations when they were combined (antagonistic effect) rather than when subjected to the isolated compounds (total ammonia and nitrite) for 96 h.

This study investigated the potential of aquaculture to spread non-native species associated with a high risk of invasiveness. We identified the biogeographic origin of produced fish species in the micro-watershed of the Sao Camilo stream, Brazil, the occurrence of non-native species in the Sao Camilo stream and the potential risk of biological invasions. Fish farmers were interviewed to obtain information about the species produced, and samples with electrofishing equipment were taken in the stream to detect the occurrence of non-native species. The Fish Invasiveness Screening Kit (FISK) protocol was applied to classify non-native species according to their invasive potential. We identified 59 fish farms and 19 produced fish species, including 13 non-native species. The non-native species Oreochromis niloticus represented 93% of production and was the second most abundant species in the stream. Eleven species were classified with a high invasive potential and two with a medium potential. The results showed the prevalence of non-native species use in aquaculture, with species escapes with a high invasive potential. Thus, the non-native species produced in aquaculture represent an important vector of introductions and risk to biodiversity conservation. It is vital to establish biosafety norms, to enable aquaculture to develop in a sustainable way.

This study determined the effects of nitrite on different life stages of the Amazon river prawn Macrobrachium amazonicum. Prawns of each life stage (postlarvae, juveniles and adults) were stocked in 24 experimental units (n = 10 prawns), under a complete randomized design. Individuals were exposed to nitrite (0, 1, 2, 4, 8 and 16 mg L−1). The median lethal concentration after 96 h (96 h LC50) was calculated through the Weibull I. The mortality results showed that M. amazonicum is slightly less tolerant to nitrite than other species of Macrobrachium. The 96 h LC50 for postlarvae, juveniles and adults of M. amazonicum were of 1.49, 2.36 and 2.34 mg nitrite/L, respectively. Nitrite intoxication risk quotient suggest moderated risk to low risk to the species. Usually in production systems nitrite values are lower than safe levels suggested in this study (0.1 mg L−1 to postlarvae and 0.2 mg L−1 nitrite to juvenile and adults), which makes our results appropriate for the production of this species.

The present study aimed to determine the effect of acute and chronic exposure to nitrate on the zootechnical performance and welfare of Macrobrachium rosenbergii post-larvae. In order to assess acute nitrate toxicity, M. rosenbergii post-larvae (n=280) were exposed to seven concentrations in quadruplicate (0, 10, 50, 100, 200, 400, and 800 mg L−1 N–NO3−) for 96 h. The results showed LC50 values for 24, 48, 72, and 96 h of approximately 352, 192, 114, and 87 mg L−1 nitrate, respectively. The safety level (SL) of nitrate was estimated at 8.62 mg L−1. Chronic toxicity was assessed based on the SL established during the acute test. The chronic experimental design comprised five treatments and three replicates, namely, control (no nitrate - 0 mg L−1), half the SL (4.5 mg L−1), the SL itself (9 mg L−1), twice the SL (18 mg L−1), and four times the SL (36 mg L−1), with the post-larvae (n=400) being exposed for 24 days. By the end of the experiment, survival, weight, length, final biomass, antenna length, and scaled mass index (SMI) were assessed. The chronic toxicity test showed a negative trend in survival and biomass with reductions from 89 to 28% and 0.72 to 0.23 g, respectively, as concentration increased from 0 to 36 mg L−1. A significantly negative effect was also observed for weight (0.036 to 0.019 g), total length (1.72 to 1.36 cm), and mean antenna length (2.32 to 1.72 cm) (F = 6.18; P = 0.00013). The SMI was also impacted by the increase in nitrate concentration. It can be concluded that concentrations above 4.5 N–NO3- (half the safety level) are not recommended for the production of M. rosenbergii post-larvae.

O objetivo do projeto é estimular a produção de camarões através do repasse de tecnologia e acompanhamento da produção pela equipe do Laboratório de Carcinicultura da UFPR – Setor Palotina. Anualmente, é ministrado um curso de extensão teórico/prático, onde é fornecido material didático. Os resultados vem demonstraram a viabilidade da produção em sistemas de monocultivo e policultivo, com índices de produtividade de acordo com os melhores resultados alcançados na atividade.DOI: http://dx.doi.org/10.35700/ca.2015.ano2n3.p117-122.1790

Foi avaliado o efeito de níveis de proteína digestível - PD na dieta sobre o desempenho do acará-bandeira (Pterophyllum scalare). O delineamento foi inteiramente casualizado, composto por cinco tratamentos (30, 32, 34, 36 e 38% de PD) e quatro repetições, durante 60 dias. Foram utilizados 200 peixes, distribuídos em 20 aquários de 45l cada, em sistema de recirculação, com temperatura controlada e fotoperíodo de 12h. Os animais foram submetidos a uma dieta isoenergética 3200 Kcal.kg-1 de energia digestível e, contendo níveis crescentes de PD. Foram analisados os índices zootécnicos levando em consideração: ganho de peso, conversão alimentar aparente, taxa de eficiência proteica, taxa de crescimento específico e conversão alimentar aparente. Os resultados foram submetidos à análise de variância (ANOVA), seguida pelo teste de Tukey (P0,05). Dessa forma, conclui-se que juvenis de acará-bandeira podem ser alimentados com 34% de PD sem comprometer o desempenho zootécnico, considerando o elevado custo associado à inclusão de proteína a níveis superiores.

The pressure on the benthic macroinvertebrate community and the use of artificial diets were evaluated during the pen rearing of Macrobrachium amazonicum. The study followed a completely randomized design with three treatments and three repetitions: treatment no prawns, no feed (noPnoF); treatment prawns, no feed (PnoF); and treatment prawns, feed (PF). Six pens were stocked with 10 prawns m−2 with average initial weight of 0.63 ± 0.05 g and average length of 4.28 ± 0.14 cm; the other three pens were not stocked with prawns. Every 10 days, prawn biometry was carried out and samples were collected from the water and the sediment in each pen. The results showed that the limnological variables remained adequate for the species' biology. The zootechnical indices did not differ significantly (P > 0.05) in weight, total length and survival, with values of 4.43 ± 0.93 g, 8:03 ± 0:43 cm, and 80 ± 9.6%, respectively, for the treatment PnoF, and 4.83 ± 1.03 g, 8.42 ± 0.51 cm and 73 ± 3.5% for treatment PF. The macroinvertebrate analyses showed a significant difference (P

O trabalho aborda a utilização do fósforo na nutrição de peixes e em dietas formuladas com ingredientes de origem vegetal. Nestes ingredientes, o fósforo encontra-se de forma indisponível para animais monogástricos, devido à carência da enzima fitase. A suplementação de enzimas exógenas (fitase) em ração tem por objetivo aumentar a capacidade de absorção do fósforo em dietas contendo ingredientes de origem vegetal, reduzindo a perda por excreção deste nutriente para o ambiente aquático. A enzima atua hidrolisando o fitato, tornando-o disponível para o organismo. Devido à importância do fósforo na nutrição de peixes, esta revisão apresenta alguns aspectos, sobre a importância na nutrição bem como sobre os fatores antinutricional e os benefícios causados pela inclusão da enzima em dietas balanceadas para peixes.

O estudo e o conhecimento dos primeiros dias de vida dos peixes sao de extrema importância, especialmente para especies selvagens e nativas, potencialmente viaveis para a piscicultura. Desta forma o trabalho teve como objetivo acompanhar o desenvolvimento embrionario da Hypophthalmichthys molitrix . A temperatura media da agua apresentou pequena variacao durante a realizacao do trabalho de 24,07 ± 0,23°C, ja os outros parâmetros como: pH, Alcalinidade, Dureza e Amonia, permaneceram constantes. A primeira segmentacao foi observada com 22 minutos. A formacao da blastula ocorreu com 2 horas e 27 minutos, com 9 horas e 12 minutos observou-se a gastrula com 90% de formacao, o fechamento do blastoporo se deu com 9 horas e 49 minutos e a diferenciacao do embriao com 12 horas e 56 minutos. A eclosao ocorreu com 20 horas e 3 minutos apos a fertilizacao, totalizando desta forma 482,6 horas/graus. O desenvolvimento embrionario da carpa prateada Hypophthalmichthys molitrix o corre dentro do periodo normal, como observado para as de mais especies de peixes de agua doce de regioes tropicais, mas muito ainda tem que ser estudado na area de embriologia de peixes, a fim de buscar maior conhecimento sobre o desenvolvimento destes animais.

A invasão da água doce por crustáceos ocorreu repetidamente ao longo dos anos, pressionando um ajuste em seus processos fisiológicos. A habilidade de sobreviver aos diferentes ambientes foi encontrada em traços osmorregulatórios, e estão relacionadas à capacidade de regular o fluido extracelular. Portanto, o objetivo deste manuscrito é explorar os processos osmorregulatórios de camarões palemonídeos e peneídeos, visualizando um padrão na capacidade osmorregulatória em ambas as famílias e, em particular, tratar de assuntos pertinentes aos efeito no ciclo ontogenético e o efeito ocasionado pelo nitrito na hemolinfa de crustáceos. Comparando palemonídeos e peneídeos, percebe-se que o sucesso da conquista do ambiente dulcícola, e a não necessidade de hiporregulação, levou à perda dessa capacidade na maioria dos palemonídeos. Dessa forma, se supõem um ancestral com capacidade hiporregulatória, uma vez que invertebrados marinhos são, parcimoniosamente, osmoconformadores. Compara-se também que o nitrito apresenta efeito nas proteínas presentes na hemolinfa dos crustáceos quando submetidos à exposição natural ou induzida deste composto, e que a capacidade osmorregulatória é, portanto, variada de acordo com seus estágios.

http://dx.doi.org/10.5007/1807-0221.2017v14n25p27O objetivo deste trabalho foi analisar a economia e os aspectos sociais da atividade de pesca artesanal da região da foz do rio Araguaia. Foram entrevistados 562 pescadores integrantes de seis colônias de pescadores: Araguatins (Z-1); Vitória Régia (Z-24); Araguanã (Z-3); Xambioá (Z-33); Piçarra (Z-55) e São Geraldo do Araguaia (Z-88). Os resultados demonstraram que os pescadores artesanais são formados, principalmente, por pessoas do sexo masculino, com baixa escolaridade, média de cinco integrantes na família, em sua maioria possuem casa e embarcação própria. Os pescadores estão em grande parte associados a uma colônia de pescadores e recebem em média de três salários mínimos. Observou-se ainda, que a maioria atua na atividade acima de seis horas diárias e tem como principal ferramenta de pesca a rede de emalhar. No contexto geral, compreende-se que a pesca artesanal faz parte de um modo de vida desta comunidade e que deve ser preservada.

O presente estudo avaliou o efeito da relação energia:proteína da dieta no desempenho de juvenis do apaiari, Astronotus ocellatus. Trinta e dois juvenis (4,99 ± 0,63 g; 2,64 ± 0,74 cm) foram alojados em 32 tanques rede de polietileno com sistema de filtragem mecânica e biológica, aeração constante e fotoperíodo de 12:12 horas. Os tratamentos consistiram em quatro dietas isoenergéticas (3.850 kcal kg-1), com níveis crescentes (38%, 43%, 48% e 53%) de proteína bruta (PB), obtendo-se, dessa forma, relações energia: proteína de 7 (T-1), 8 (T-2), 9 (T-3) e 10 (T-4) kcal g-1 de energia digestível (ED). As dietas foram administradas diariamente, até a saciedade aparente, as 10 e 16 horas, durante 75 dias, em delineamento experimental inteiramente ao acaso (DIC). Os dados obtidos foram submetidos à análise de variância e teste de Tukey ao nível de 5% de probabilidade. Ao fim do experimento, o tratamento dois apresentou o melhor valor para o ganho de peso acumulado (10,92 ± 0,3 g), diferindo significativamente dos demais (P0,05). Pode-se sugerir, com base nos resultados obtidos, que a relação de 8 kcal g-1 de PB atende as exigências nutricionais de juvenis do A. ocellatus, proporcionado melhor desempenho zootécnico.

A indisponibilidade de recursos naturais provoca efeitos negativos nas áreas ambiental, econômica e social, além de ser indispensável à sobrevivência. A aquicultura pode ser uma alternativa capaz de garantir a manutenção do homem ao campo, com baixos efeitos negativos ao ambiente. Proporciona incremento na renda familiar, através da diversificação da atividade na pequena propriedade, garantido retorno econômico de forma sustentável. Entretanto, mesmo a aquicultura apresentando gargalos produtivos, estes podem ser contornados por meio de parcerias (cooperativas, associações e/ou interação entre produtores), incentivos fiscais e auxilio técnico público atuante nesta atividade, proporcionando as pequenas propriedades mais competitividade no mercado. Portanto, o trabalho tem como objetivo realizar um levantamento do perfil socioeconômico de pequenas propriedades rurais da região Fronteiriça do Sudoeste do Paraná. Identificando por meio do presente estudo a realidade local das propriedades.