Maturation of the Mangrove Oyster<i>Crassostrea gasar</i>at Different Temperatures in the Laboratory

Ramos, Cassio de Oliveira; Gomes, Carlos Henrique Araújo de Miranda; Magalhães, Aimê Rachel Magenta; Santos, Alexandra Inês dos; Melo, Cláudio

doi:10.2983/035.033.0118

Cited by 11 publications

(11 citation statements)

References 25 publications

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“…Cultured C. gasar oysters became mature and present several spawning peaks during most parts of the year (PAIXÃO et al, 2013;RAMOS et al, 2014). It is important to consider that the oyster growth data presented here represents the mean of two different oyster species, which were likely pulled down by the species with the worst performance.…”

Section: Discussionmentioning

confidence: 99%

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Growth, mortality and susceptibility of oyster Crassostrea spp. to Perkinsus spp. infection during on growing in northeast Brazil

Scardua

Vianna

Duarte

et al. 2017

Rev. Bras. Parasitol. Vet.

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Crassostrea rhizophorae and C. gasar oysters are cultivated in the northeast region. Perkinsus parasites infect bivalves, and their effects on oysters from tropical regions are poorly understood. This study evaluated the impact of Perkinsus infection on the productive traits of native oysters. Oysters were sampled bimonthly during 7 months, from July 2010 to February 2011, to evaluate growth rate, mortality and shell color patterns (white and dark-gray) (n = 500), and to determine the prevalence and intensity of Perkinsus (n = 152). Perkinsus and Crassostrea species were determined using molecular tools. Results showed that most dark-gray (90%, n = 20) and white (67%, n = 18) oysters were C. gasar and C. rhizophorae, respectively. Oysters showed a high growth rate and moderate cumulative mortality (44%). C. gasar oysters grew better and showed lower mortality and lower incidence of Perkinsus compared to C. rhizophorae. The mean prevalence of Perkinsus was moderate (48%), but the infection intensity was light (2.2). Perkinsosis affected very small oysters (19.4 mm). In conclusion, native oysters, especially C. gasar, have a great potential for culture, mortality is not associated with perkinsosis, and the shell color of oysters can be used to improve selection for spats with better performance.

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Section: Discussionmentioning

confidence: 99%

“…Recently, some studies were conducted in order to evaluate oyster maturation (RAMOS et al, 2014), larval settlement (SILVEIRA et al, 2011) and performance in culture (LOPES et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Growth, mortality and susceptibility of oyster Crassostrea spp. to Perkinsus spp. infection during on growing in northeast Brazil

Scardua

Vianna

Duarte

et al. 2017

Rev. Bras. Parasitol. Vet.

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“…However, some efforts have been made by research institutions to understand certain biological aspects of C. gasar that may be useful in the production process (LOPES et al, 2013;RAMOS et al, 2014;SILVEIRA et al, 2011;GOMES et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Epizootiology of Perkinsus sp. inCrassostrea gasar oysters in polyculture with shrimps in northeastern Brazil

Silva

Costa

Araújo

et al. 2016

Rev. Bras. Parasitol. Vet.

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Bivalve culture is of considerable economic and social interest in northeastern (NE) Brazil. The polyculture is an alternative approach to traditional monoculture for reducing the environmental impact of shrimp farming and improving oyster culture. Perkinsus marinus and Perkinsus olseni were found infecting oysters in NE Brazil and can threaten oyster production. This study evaluated Perkinsus spp. occurrence in Crassostrea gasar during all production stages. Oyster spats were produced in a hatchery and grown in shrimp ponds in Rio Grande do Norte state. Perkinsus spp. were surveyed by Ray's fluid thioglycollate medium and confirmed by polymerase chain reaction. Prevalence and intensity of infection were determined in oysters until they reached 7 cm. Results showed that the broodstock was already infected by Perkinsus (60%), but the derived spats were Perkinsus-free. Oyster spats acquired Perkinsus infection when transferred to ponds. The prevalence gradually increased in the seven months following placement in ponds (73%), and then decreased to 17% by the tenth month. The infections were initially mild, but intensity increased at the final growth stage. In conclusion, it is possible to produce Perkinsus-free C. gasar oyster spats from infected broodstock, and their culture in shrimp ponds is feasible.Keywords: Crassostrea gasar, hatchery, oyster, polyculture, Perkinsus sp., sanitary control. ResumoO cultivo de bivalves é de grande interesse econômico e social no Nordeste (NE) do Brasil. O policultivo é uma alternativa ao monocultivo tradicional de camarões para reduzir o impacto ambiental e melhorar a produção de ostras. Perkinsus marinus e Perkinsus olseni foram identificados infectando ostras no Nordeste do Brasil e representam uma ameaça a produção de ostras. Este estudo avaliou a ocorrência de Perkinsus spp. em Crassostrea gasar durante todas as fases de produção. Sementes de ostras foram produzidas em laboratório e cultivadas em viveiros de camarão no Rio Grande do Norte. Perkinsus spp. foram diagnosticados com o uso do meio de tioglicolato fluido de Ray e confirmado por reação em cadeia da polimerase. A prevalência e intensidade de infecção foram determinadas em ostras até atingirem 7 cm. Os resultados mostraram que os reprodutores encontravam-se infectados por Perkinsus (60%), mas as sementes produzidas estavam livres de Perkinsus. As sementes adquiriram a infecção por Perkinsus quando transferidas para os viveiros. A prevalência aumentou gradualmente nos sete meses após a colocação nos viveiros (73%) e, em seguida, diminuiu para 17% até o décimo mês. As infecções foram inicialmente leves, mas aumentaram até a fase final do crescimento. Em conclusão, é possível produzir sementes de ostras C. gasar livres de Perkinsus a partir de reprodutores infectados e seu cultivo em viveiros de camarão é viável.Palavras-chave: Crassostrea gasar, unidade de reprodução, ostras, policultivo, Perkinsus sp., controle sanitário.

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“…Brazil is one of the biggest bivalve producer in South America (FAO, 2014), and the state of Santa Catarina is the main Brazilian oyster producer (91%). The Pacific oyster C. gigas and the native oyster C. brasiliana (= C. gasar ; Lamarck, 1819) are very important species, contributing greatly to the economy and livelihood of many coastal communities (Carranza, Defeo, & Beck, ; EPAGRI ; Ramos, Gomes, Magalhães, Santos, & Melo, ). In southern Brazil, sporadic mortalities, reaching 40%–90%, have already been reported in native and exotic oysters (Nascimento, Smith, Kern, & Pereira, ; Sabry & Magalhães, ; Silveira, ).…”

Section: Vibrio Splendidus‐related Bacteria and Oshv‐1 Dna Detection mentioning

confidence: 99%

First evidence of viral and bacterial oyster pathogens in the Brazilian coast

Mello

Danielli

Curbani

et al. 2017

Journal of Fish Diseases

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Maturation of the Mangrove OysterCrassostrea gasarat Different Temperatures in the Laboratory

Cited by 11 publications

References 25 publications

Growth, mortality and susceptibility of oyster Crassostrea spp. to Perkinsus spp. infection during on growing in northeast Brazil

Growth, mortality and susceptibility of oyster Crassostrea spp. to Perkinsus spp. infection during on growing in northeast Brazil

Epizootiology of Perkinsus sp. inCrassostrea gasar oysters in polyculture with shrimps in northeastern Brazil

First evidence of viral and bacterial oyster pathogens in the Brazilian coast

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