Application of von Bertalanffy growth curves in a Farfantepenaeus paulensis (Decapoda, Penaeidae) captive broodstock

The aim off the present study was to analyze the growth Farfantepenaeus paulensis juveniles captured in the Patos Lagoon Estuary (Rio Grande do Sul, Brasil), by fitting the von Bertalanffy growth model. Estuary-caught juveniles with mean weight (± SD)of 9.7 ± 2.3 and 7.5 ±2.3g for mamales and males, respectively, werw mantained indoors at a density of 7.3 srimp / m²for 279 days by which time they had exceeded the minimum size for reproduction (32.50 ± 5.14g for femalis and 21.55 ±2.15g for males). Modal progression analysis and the von Bertalanffy growth model were used to estimative weigth (W) and carapace length (Lc)growth curver for females and males, as follows: The growth curves were coherent with published information for F. paulensis and other panaeids, and provide a tool for aquaculture management and research

Effect of natural production in a zero exchange suspended microbial floc based super-intensive culture system for white shrimp Litopenaeus vannamei

Zero water exchange, super-intensive culture of shrimp in enclosed raceway type systems can be considered environmentally friendly in that containment of water within the system prevents potential spread of disease between the wild populations and cultured animals and avoids nutrient rich waste from polluting coastal waters. However, as a relatively new strategy for shrimp production, there is much still to be learned about the potential biological and economic benefits of producing shrimp in suspended microbial floc based systems. Understanding shrimp feeding behavior and quantification of shrimp feed consumption provides valuable information for culturists to improve feed management, one of the keys to economic viability. The objective of this study was to evaluate the nutritional contribution of varying levels of microalgae/bacterial floc on survival, growth, food consumption, and FCR of Litopenaeus vannamei juveniles fed diets with different protein levels in replicated experimental microcosm tanks. The 20 day experiment evaluated 9 treatments, three water types fed three different protein diets. Water was recirculated within a sump and consisted of either clear, UV filtered water, water containing microbial floc from an adjacent zero exchange super-intensive raceway production unit, or a 50:50 mix of clear water and raceway water. Diet treatments were either no food, 25% or 35% protein content. Treatments were randomly assigned to 50 L, mesh covered plastic bins receiving each water type. Each treatment consisted of five replicates, each containing 44 shrimp, with a mean stocking weight of 1.82±0.71 g for a final density of 300 per m2. Shrimp in each treatment (except the no feed treatment) were fed 3 times daily via a specially designed feed tray. Food consumption and FCR were calculated based on weight gain, survival, total consumed feed, feed loss through leaching, and initial feed moisture content. Results were analyzed by two-way analysis of variance (ANOVA) and differences between the means analyzed by Tukey's test (α=0.05). Survival in the fed treatments was greater than 98% in all treatments (P>0.05). Survival in the non-fed treatments was significantly higher in the raceway water treatments than in the clear water treatment (P<0.05). Final weight, weight gain, final biomass, food consumption and FCR were significantly higher (P<0.05) in all treatments fed with 35% protein feed. This result suggests a positive relationship between the growth parameters and the protein content of the feeds in this system, and confirms the benefit of natural productivity for production of L. vannamei. © 2006 Elsevier B.V. All rights reserved

Tolerância de Juvenis do "papa-terra" Menticirrhus Littoralis (Holbrook, 1860) (Pisces: Sciaenidae) a baixas salinidades

O papa-terra Menticirrhus littoralis é uma espécie abundante, de significativa importância na pesca comercial e esportiva no sul do Brasil, possuindo uma elevada demanda de mercado. A fim de avaliar o potencial da introdução desta espécie nativa na aqüicultura, o presente trabalho teve como objetivo determinar a sobrevivência de juvenis de M. littoralis (0,98±0,2 g e 46,26±4,6 mm) em baixas salinidades através de testes de curta (96 horas) e longa duração (15 dias). Analisando os resultados obtidos, foi possível estimar as Salinidades Letais Medianas (SL’50) em 2,29, 2,28, 2,24 e 2,23‰ para os períodos de 24, 48, 72 e 96 h, respectivamente. Durante a exposição, por 15 dias, às salinidades de 3, 4, 5, 10 e 34‰ foram registradas mortalidades de 50,0, 13,6, 22,7, 13,6 e 22,7%, respectivamente. Estes resultados indicam que juvenis de M. littoralis são sensíveis a salinidades entre 0 e 3‰, mas podem tolerar salinidades entre 3 e 10‰, demonstrando capacidade em tolerar choques hiposmóticos. O presente resultado oferece subsídios para que outros estudos relacionados a parâmetros físico-químicos possam ser feitos visando a introdução da espécie em criações dominadas por condições estuarinas de salinidade.The gulf kingfish, Menticirrhus littoralis is an abundant species with a significant recreational and commercial importance in southern Brazil. In order to evaluate its potential for aquaculture, the present work highlights the survival of M. littoralis juveniles (0.98±0.2 g and 46.26±4.6 mm) in low salinities throughout short and long-term tests. As a result, it was possible to esteem the Median Lethal Concentration Salinities (LS50) as 2.29, 2.28, 2.24 and 2.23% for 24, 48, 72 and 96 h, respectively. During 15 days of exposition to 3, 4, 5, 10 and 34‰, mortalities of 50.0, 13.6, 22.7, 13.6 and 22.7% were registered, respectively. These results suggest that the juveniles are sensible to salinities between 0 and 3‰, however they can tolerate salinities between 3 and 10‰, presenting high survival. In such a way, it was demonstrated that M. littoralis juveniles possess great capacity in tolerate hyposmotics stress, being able to survive during long periods in low salinity waters. We conclude that the species has a great potential to be introduced in estuarine aquaculture in terms of salinity, but many studies related to physical-chemical parameters must be conducted in order to confirm that hypothesis

Tolerance of gulf kingfish juveniles Menticirrhus littoralis (Holbrook, 1860) (Pisces: Sciaenidae) to low salinities

Submitted by Francine Oliveira ([email protected]) on 2011-06-15T12:14:05Z No. of bitstreams: 1 TOLERÂNCIA DE JUVENIS DO PAPA-TERRA.pdf: 84746 bytes, checksum: e5ae635d07b5f5258573162c365de1f4 (MD5)Approved for entry into archive by Barbara Milbrath([email protected]) on 2011-06-15T17:08:26Z (GMT) No. of bitstreams: 1 TOLERÂNCIA DE JUVENIS DO PAPA-TERRA.pdf: 84746 bytes, checksum: e5ae635d07b5f5258573162c365de1f4 (MD5)Made available in DSpace on 2011-06-15T17:08:26Z (GMT). No. of bitstreams: 1 TOLERÂNCIA DE JUVENIS DO PAPA-TERRA.pdf: 84746 bytes, checksum: e5ae635d07b5f5258573162c365de1f4 (MD5) Previous issue date: 2008O papa-terra Menticirrhus littoralis é uma espécie abundante, de significativa importância na pesca comercial e esportiva no sul do Brasil, possuindo uma elevada demanda de mercado. A fim de avaliar o potencial da introdução desta espécie nativa na aqüicultura, o presente trabalho teve como objetivo determinar a sobrevivência de juvenis de M. littoralis (0,98±0,2 g e 46,26±4,6 mm) em baixas salinidades através de testes de curta (96 horas) e longa duração (15 dias). Analisando os resultados obtidos, foi possível estimar as Salinidades Letais Medianas (SL’50) em 2,29, 2,28, 2,24 e 2,23‰ para os períodos de 24, 48, 72 e 96 h, respectivamente. Durante a exposição, por 15 dias, às salinidades de 3, 4, 5, 10 e 34‰ foram registradas mortalidades de 50,0, 13,6, 22,7, 13,6 e 22,7%, respectivamente. Estes resultados indicam que juvenis de M. littoralis são sensíveis a salinidades entre 0 e 3‰, mas podem tolerar salinidades entre 3 e 10‰, demonstrando capacidade em tolerar choques hiposmóticos. O presente resultado oferece subsídios para que outros estudos relacionados a parâmetros físico-químicos possam ser feitos visando a introdução da espécie em criações dominadas por condições estuarinas de salinidade.The gulf kingfish, Menticirrhus littoralis is an abundant species with a significant recreational and commercial importance in southern Brazil. In order to evaluate its potential for aquaculture, the present work highlights the survival of M. littoralis juveniles (0.98±0.2 g and 46.26±4.6 mm) in low salinities throughout short and long-term tests. As a result, it was possible to esteem the Median Lethal Concentration Salinities (LS50) as 2.29, 2.28, 2.24 and 2.23% for 24, 48, 72 and 96 h, respectively. During 15 days of exposition to 3, 4, 5, 10 and 34‰, mortalities of 50.0, 13.6, 22.7, 13.6 and 22.7% were registered, respectively. These results suggest that the juveniles are sensible to salinities between 0 and 3‰, however they can tolerate salinities between 3 and 10‰, presenting high survival. In such a way, it was demonstrated that M. littoralis juveniles possess great capacity in tolerate hyposmotics stress, being able to survive during long periods in low salinity waters. We conclude that the species has a great potential to be introduced in estuarine aquaculture in terms of salinity, but many studies related to physical-chemical parameters must be conducted in order to confirm that hypothesis

Advances in mariculture on the first decade of the XXI century: marine fish and shrimp culture

Submitted by Michele Fernanda ([email protected]) on 2012-05-15T00:11:31Z No. of bitstreams: 1 Avanços da maricultura na primeira década do século XXI - piscicultura ecarcinocultura marinha.pdf: 128017 bytes, checksum: 3122b1363ef5c75744d6e7ae3adc4cb0 (MD5)Approved for entry into archive by Bruna Vieira([email protected]) on 2012-06-30T01:21:28Z (GMT) No. of bitstreams: 1 Avanços da maricultura na primeira década do século XXI - piscicultura ecarcinocultura marinha.pdf: 128017 bytes, checksum: 3122b1363ef5c75744d6e7ae3adc4cb0 (MD5)Made available in DSpace on 2012-06-30T01:21:28Z (GMT). No. of bitstreams: 1 Avanços da maricultura na primeira década do século XXI - piscicultura ecarcinocultura marinha.pdf: 128017 bytes, checksum: 3122b1363ef5c75744d6e7ae3adc4cb0 (MD5) Previous issue date: 2010A piscicultura marinha é um setor pouco desenvolvido na maricultura brasileira. Por vários anos foi avaliado o potencial de cultivo de algumas espécies como o robalo-peva Centropomus parallelus e o linguado Paralichtys orbignyanus. Entretanto, somente a partir do investimento sobre o bijupirá Rachycentron canadum é que empresas privadas passaram a demonstrar maior interesse na atividade. Além dos sistemas tradicionais de piscicultura, o bijupirá pode ser criado em tanquesrede oceânicos. Esta espécie apresenta crescimento rápido, atingindo entre 4 e 8 kg em um ano de vida, e carne de excelente qualidade. A carcinocultura tem sido questionada por questões ambientais, uso de insumos como farinha e óleo de peixe e disseminação de doenças. A criação de camarões em sistemas sem renovação de água “ZEAH” (Zero Exchange, Aerobic, Heterotrophic Culture Systems) ou cultivo em meio aos Bioflocos (BFT) aplica métodos que minimizam estes problemas, contribuindo para uma maricultura mais saudável.Marine fish culture is still in its infancy in Brazil. For several years the snook Centropomus parallelus and the flounder Paralicithys orbignyanus were considered for aquaculture, but their commercial application has not yet been achieved. However, once technology for culture of cobia Rachycentron canadum became available, several private companies showed interest for marine fish culture. Besides traditional rearing technologes, cobia is suitable for open ocean culture in cages. This species shows fast growth rates, fish can achieve 4 or 8 kg within one year of age and its flesh is highly appreciated. Shrimp farming has been questioned for environmental issues, use of fish oil and fish meal, and spreading diseases. Rearing shrimp in systems without water exchange, know as ZEAH (Zero Exchange Aerobic Heterotrophic Culture systems) or bioflocs applies methods that minimize these problems, contributing for the development of sustainable shrimp farming

Avanços da maricultura na primeira década do século XXI: piscicultura e carcinocultura marinha

A piscicultura marinha é um setor pouco desenvolvido na maricultura brasileira. Por vários anos foi avaliado o potencial de cultivo de algumas espécies como o robalo-peva Centropomus parallelus e o linguado Paralichtys orbignyanus. Entretanto, somente a partir do investimento sobre o bijupirá Rachycentron canadum é que empresas privadas passaram a demonstrar maior interesse na atividade. Além dos sistemas tradicionais de piscicultura, o bijupirá pode ser criado em tanquesrede oceânicos. Esta espécie apresenta crescimento rápido, atingindo entre 4 e 8 kg em um ano de vida, e carne de excelente qualidade. A carcinocultura tem sido questionada por questões ambientais, uso de insumos como farinha e óleo de peixe e disseminação de doenças. A criação de camarões em sistemas sem renovação de água “ZEAH” (Zero Exchange, Aerobic, Heterotrophic Culture Systems) ou cultivo em meio aos Bioflocos (BFT) aplica métodos que minimizam estes problemas, contribuindo para uma maricultura mais saudável.Marine fish culture is still in its infancy in Brazil. For several years the snook Centropomus parallelus and the flounder Paralicithys orbignyanus were considered for aquaculture, but their commercial application has not yet been achieved. However, once technology for culture of cobia Rachycentron canadum became available, several private companies showed interest for marine fish culture. Besides traditional rearing technologes, cobia is suitable for open ocean culture in cages. This species shows fast growth rates, fish can achieve 4 or 8 kg within one year of age and its flesh is highly appreciated. Shrimp farming has been questioned for environmental issues, use of fish oil and fish meal, and spreading diseases. Rearing shrimp in systems without water exchange, know as ZEAH (Zero Exchange Aerobic Heterotrophic Culture systems) or bioflocs applies methods that minimize these problems, contributing for the development of sustainable shrimp farming

The use of protozoan, rotifers and nematodes as live food for shrimp raised in bft system

O Meio de Cultivo de Protozoarios e Nematodeos – PNCM, possibilita a producao de microrganismos de forma barata para a utilizacao como alimento vivo em cultivos de camaroes marinhos. Ciliados produzidos no PNCM foram testados como alimento vivo para pos-larvas de camaroes em um experimento com quatro tratamentos: (BFT) somente bioflocos; (BFT 10) 10 mL de PNCM adicionado ao biofloco; (BFT 100) 100 mL de PNCM adicionado ao biofloco; BFT 1000) 1000 mL de PNCM adicionado ao biofloco. Os microrganismos foram analisados nas fases inicial, intermediaria e final do experimento, realizado durante 30 dias. A analise do conteudo estomacal dos camaroes indicou a predacao dos ciliados pelas pos-larvas. Na maioria dos tratamentos, o periodo inicial foi marcado pelo incremento dos flagelados, a fase intermediaria foi marcada pela reducao na abundancia de ciliados, a fase final foi representada pelo aumento na abundancia de ciliados e rotiferos. Em todos os tratamentos, os nematodeos nao foram encontrados nas amostras finais, em nenhuma das tres fases de cultivo, sugerindo que estes organismos foram efetivamente predados pelos camaroes. Este estudo indicou que ciliados, rotiferos e nematodeos, desempenham importante papel como alimento vivo em larviculturas, principalmente pelo seu tamanho reduzido, valor nutricional e atratividade exercida sobre as pos-larvas.The Protozoan and Nematodes Culture Medium – PNCM, enable inexpensively production of microorganism to be used as live food in shrimp culture. It was tested the ciliates produced by PNCM as live food for shrimp larvae in an experiment with four treatments: (BFT) only biofloc medium; (BFT 10) 10 mL of PNCM culture added to biofloc; (BFT 100) 100 mL of PNCM culture added to biofloc; and (BFT 1000) 1000 mL of PNCM culture added to biofloc. The microorganisms were analyzed at the beginning, intermediate and final phases of the experiment which lasted for 30 days. The analysis of shrimp gut contents indicated a predation of shrimps on the ciliates. In most treatments, in the initial period there was significant increase of flagellates, the intermediate phase was marked by the ciliates decrease and the final period was represented by an increase in the abundance of the ciliates and rotifers. Nematodes were absent at the end of the final phase in all treatments, suggesting that these organisms were effectively preyed by shrimps. This study indicate that ciliates, rotifers and nematodes play an important role as live food in hatcheries mainly due to their small size, nutritional value and attractivity exerted on shrimp postlarvae