Características hematológicas de teleósteos brasileiros: IV. Variáveis do jundiá Rhamdia quelen ( Pimelodidae)

Tavares‐Dias, Marcos; Melo, José Fernando Bibiano; Moraes, Gilberto; Moraes, Flávio Ruas de

doi:10.1590/s0103-84782002000400024

Cited by 47 publications

(28 citation statements)

References 12 publications

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“…The differential leukocyte count was characterized by lymphocytes as the most abundant cells, followed by neutrophils and monocytes, in accordance to the proportion reported by other authors for siluriform fishes (TAVARES-DIAS et al 2002b;MABILIA;SOUZA, 2006;JERÔNIMO et al, 2009).…”

Section: Discussionsupporting

confidence: 89%

Haematological and parasitological assessment of silver catfish Rhamdia quelen farmed in Southern Brazil

Brum

Tancredo

Hashimoto

et al. 2014

Rev. Bras. Parasitol. Vet.

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This study evaluated for two years the haematological parameters and the occurrence of gill parasites in silver catfish Rhamdia quelen, farmed in the state of Santa Catarina, southern Brazil. Between March 2010 and January 2012, a total of 137 fish were caught in a fish farm to compare the haematological and parasitological analysis, during hot and cold seasons. Simultaneously, water quality parameters were measured in the pond to analyze the relationship between environmental conditions and haematology and parasitism. During the hot season, there was an increase in water temperature, electrical conductivity and ammonia followed by a decrease in dissolved oxygen, pH, transparency and alkalinity. Two species of Monogenea were observed in the gills, Aphanoblastella mastigatus (Dactylogyridae) and Scleroductus sp. (Gyrodactylidae). Additionally, during this season, there was a significant increase (p<0.05) in the mean intensity of infection by Monogenea, as well as total leukocytes number, thrombocytes and lymphocytes, and a reduction in monocytes. The changes might be caused by parasitism and/or environmental variations between seasons.Keywords: Siluriformes, parasitology, gills, haematology, blood, seasons. ResumoO presente estudo avaliou, durante dois anos, os parâmetros hematológicos e a ocorrência de parasitos branquiais em jundiá Rhamdia quelen, cultivado no Estado de Santa Catarina, Sul do Brasil. Entre março de 2010 e janeiro de 2012, um total de 137 jundiás foi coletado de uma piscicultura para comparar os parâmetros hematológicos e parasitológicos durante as estações quente e fria. Simultaneamente, foram medidos os parâmetros de qualidade da água do viveiro, para relacionar as condições ambientais com a hematologia e o parasitismo. Na estação quente, houve aumento da temperatura, condutividade elétrica e amônia, e redução do oxigênio dissolvido, pH, transparência e alcalinidade. Duas espécies de Monogenea foram observadas nas brânquias, Aphanoblastella mastigatus (Dactylogyridae) e Scleroductus sp. (Gyrodactylidae). Na estação quente, houve aumento significativo (p<0,05) da intensidade média de infecção por Monogenea, bem como dos valores de leucócitos totais, trombócitos e linfócitos, e redução significativa dos monócitos. As diferenças observadas podem ter sido causadas pelas variações ambientais entre as estações.

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Section: Discussionsupporting

confidence: 89%

Haematological and parasitological assessment of silver catfish Rhamdia quelen farmed in Southern Brazil

Brum

Tancredo

Hashimoto

et al. 2014

Rev. Bras. Parasitol. Vet.

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“…Leukocytosis was observed when tambaqui (Colossoma macropomum) were subjected to the stimulus of capture (42). Their response to this stressful stimulus was to contract the spleen through sympathetic action and release leukocytes into the bloodstream (17).…”

Section: Resultsmentioning

confidence: 99%

Hematology and productive performance of nile tilapia (Oreochromis niloticus) naturally infected with Flavobacterium columnare

Sebastião¹,

Nomura²,

Sakabe³

et al. 2011

Braz. J. Microbiol.

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Columnaris disease is one of the main causes of mortality in tilapia rearing and is responsible for large economic losses worldwide. Hematology is a tool that makes it possible to study organisms' physiological responses to pathogens. It may assist in making diagnoses and prognoses on diseases in fish populations. The hematological variables of nile tilapia were studied in specimens with a clinical diagnosis of columnaris disease and in specimens that were disease-free. The total erythrocyte count, hemoglobin rate, hematocrit percentage, mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), mean corpuscular volume (MCV), organic defense blood cell percentages (leukocytes and thrombocytes) and hepatosomatic and splenosomatic index were determined. The results showed that there were changes in the erythrocytic series and in organic defense blood cells, in the fish infected with the bacterium, with reductions in erythrocytic variables and significant increases in the numbers of circulating lymphocytes and neutrophils.

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“…The use and validation of standardized non-lethal and inexpensive methods to monitor fish health are being considered as a major issue to ensure the expansion of fish production (Hrubec et al, 2000). Thus, the establishing of hematological values should be adopted as a reference to evaluate fish health status (Tavares-Dias et al, 2002). Hematology is considered as one of the key tools to assess the health status index of different species because it is provide a reliable evaluation via non-lethal means (Satheeshkumar et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Hematological and morphometric blood value of four cultured species of economically important tropical foodfish

et al. 2015

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The use and validation of fish health monitoring tools have become increasingly evident due to aquaculture expansion. This study investigated the hematology and blood morphometrics of Piaractus mesopotamicus, Brycon orbignyanus, Oreochromis niloticus and Rhamdia quelen. The fish were kept for 30 days in 300-liter aquariums, after which they were anesthetized with benzocaine and blood was collected from caudal vessels. In comparison to other species, B. orbignyanus presented the highest hematocrit (Ht), RBC averages and Mean Corpuscular Volume (MCV) with a particular range of data. O uso e validação de ferramentas para monitorar o estado de saúde dos peixes está se tornando mais evidente, devido à expansão da aquicultura. Este estudo investigou a hematologia e a morfometria do sangue de Piaractus mesopotamicus, Brycon orbignyanus, Oreochromis niloticus e Rhamdia quelen. Os peixes foram mantidos por 30 dias em aquários de 300 litros, após esse período os peixes foram anestesiados com benzocaína e o sangue coletado por punção caudal. Em comparação com outras espécies B. orbignyanus apresentou maiores médias de hematócrito (Ht), eritrócitos (Eri) e volume corpuscular médio (VCM) com um determinado intervalo de dados. Oreochromis niloticus apresentou menor média e valor de Ht, Hb, eritrócitos e concentração de hemoglobina corpuscular média (CHCM). Rhamdia quelen e O. niloticus apresentaram maior variedade de leucócitos (Leu), neutrófilos (Nf), linfócitos (Lf), monócitos (Mf) e de trombócitos (Trb). Dados de eixos maiores (EMA), eixos menores (EME), superfície (SF) e volume (VL) estão no mesmo intervalo de variação. Este estudo demonstrou que as variações hematológicas não ocorrem somente entre os animais de diferentes espécies, mas também entre os indivíduos da mesma espécie.

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Características hematológicas de teleósteos brasileiros: IV. Variáveis do jundiá Rhamdia quelen ( Pimelodidae)

Cited by 47 publications

References 12 publications

Haematological and parasitological assessment of silver catfish Rhamdia quelen farmed in Southern Brazil

Haematological and parasitological assessment of silver catfish Rhamdia quelen farmed in Southern Brazil

Hematology and productive performance of nile tilapia (Oreochromis niloticus) naturally infected with Flavobacterium columnare

Hematological and morphometric blood value of four cultured species of economically important tropical foodfish

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