Hematology patterns of migrating European eels and the role of EVEX virus

Ginneken, V.J.T. van; Ballieux, Bart E.; Willemze, Rein; Coldenhoff, K.; Lentjes, E G W M; Antonissen, E.; Haenen, O.L.M.; Thillart, G. van den

doi:10.1016/j.cca.2005.01.011

Cited by 47 publications

(64 citation statements)

References 20 publications

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“…Sahan et al [3] studied the effect of different stations in the Ceyhan river (Adana, Turkey) on hematological values of European eel (Anguilla anguilla L., 1758) and found that water quality, i.e., temperature, NO 3 -N, NO 2 -N, NH 3 -N, SRP and COD had an effect on the total white blood cell and neutrophil. Moreover, the packed cell volume of the Asian eel in this study, both capture and cultural, were higher than the packed cell volume of the European eel Anguilla anguilla L., 1758, as reported by Yavuzcan et al [6] and Van Ginneken et al [7] . These documents indicated that the environment and species of eel had an effect on hematological values.…”

Section: Resultssupporting

confidence: 58%

Comparative Hematological Values, Morphometric and Morphological Observation of the Blood Cell in Capture and Culture Asian Eel, Monopterus albus (Zuiew)

Ponsen¹,

Narkkong²,

Pamok³

et al. 2009

American J. of Animal and Veterinary Sciences

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Problem statement: Monopterus albus (Zuiew), Asian Eel, is one of the common fish found mainly in Asia. At present, the habitats of Asian Eels have been on the decrease. Contrarily, consumption of Asian Eel has increased. Whereas, data regarding blood cell characteristics, blood cell sizes and hematological values of Asian Eel are limited. As such, the objective of this study was to establish the blood cell characteristics, blood cell dimension and hematological values of capture and culture Asian Eel. Basic knowledge from this study is important for hematological research, conservation, clinical diagnosis and in-depth study of this Eel. Approach: Blood samples of capture (n = 13) and culture (n = 19) Asian Eel, Monopterus albus (Zuiew) were collected in northeastern Thailand. Hematological values, morphometric and morphology of the blood cells were determined using standard techniques. Hematological values and morphometric between captive and cultural Eel were compared. Results: Hematological values and morphometrics of the capture and cultural Eel were not significantly different (p>0.05), but the hemoglobin and neutrophil of the capture eel were significantly higher than those of the culture eel (p<0.05). Neutrophil, monocyte, eosinophil and thrombocyte characteristics of Asian Eel were not different from other Eels. Nucleus characteristics, cytoplasmic shape and nucleus: Cytoplasm ratio of small cell I and small cell II were different. Lymphocyte of Asian Eel was different form the previous report. Conclusion: This study indicated that sources of eel influenced to some hematological values.

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Section: Resultssupporting

confidence: 58%

Comparative Hematological Values, Morphometric and Morphological Observation of the Blood Cell in Capture and Culture Asian Eel, Monopterus albus (Zuiew)

Ponsen¹,

Narkkong²,

Pamok³

et al. 2009

American J. of Animal and Veterinary Sciences

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“…This quality seems to be seriously impaired by e.g. pollution, parasites and disease (Kirk 2003, Van Ginneken et al 2005, Geeraerts and Belpaire 2010. The high body fat content of eels (up to 40% of total body weight (Svedäng and Wickström, 1997)) and their longevity favour the accumulation of lipophilic contaminants (Geeraerts and Belpaire 2010).…”

Section: Introductionmentioning

confidence: 99%

Maternal transfer of emerging brominated and chlorinated flame retardants in European eels

Sühring

Freese²,

Schneider

et al. 2015

Science of The Total Environment

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Maternal transfer of emerging brominated and chlorinated flame retardants in European eels AbstractThe European eel (Anguilla anguilla) is regarded as a critically endangered species. Scientists are in agreement that the "quality of spawners" is a vital factor for the survival of the species. This quality can be impaired by parasites, disease and pollution. Especially endocrine disrupting organic chemicals pose a potential threat to reproduction and development of offspring.To our knowledge, the findings in this publication for the first time describe maternal transfer of contaminants in eels. We analysed the concentrations of in total 53 polybrominated diphenyl ethers (PBDEs) and their halogenated substitutes in muscle, gonads and eggs of artificially matured European eels and in muscle and gonads of untreated European eels that were used for comparison. We found evidence that persistent organic pollutants such as PBDEs, as well as their brominated and chlorinated substitutes are redistributed from muscle tissue to gonads and eggs. Concentrations ranged from 0.001 ng g -1 ww for sum Dechlorane metabolites (DPMA, aCL 10 DP, aCl 11 DP) to 2.1 ng g -1 ww for TBA in eggs, 0.001 ng g -1 ww for Dechlorane metabolites to 9.4 ng g -1 ww for TBA in gonads and 0.002 ng g -1 ww for Dechlorane metabolites to 54 ng g -1 ww for TBA in muscle tissue.Average egg muscle ratios (EMRs) for compounds detectable in artificially matured eels from both Schlei Fjord and Ems River ranged from 0.01 for Dechlorane 602 (DDC-DBF) to 10.4 for PBEB. Strong correlations were found between flame retardant concentrations and lipid content in the analysed tissue types, as well as transfer rates and octanol-water partitioning

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“…As a result the eel may be very vulnerable to persistent toxic con-tam inants th at are released from fat stores during migration and which may interfere w ith energy metabolism and reproduction. Among the causes advanced for the decline of eel populations are oceanographic changes, which may interfere w ith larval transport (Knights, 2003), over-fishing, viruses , 2005b or swim bladder parasites (Haenen et al, 1994;Palstra et al, 2007). Eels th at resided for significant tim es in inland w aters may contain high levels of especially polychlorinated biphenyls (PCBs) in the ranges up to 1.5-10 mg/g (De Boer and Hagel, 1994), values that exceed the Dutch standard for hum an eel consumption of 0.5 mg/kg for PCB 153.…”

Section: Introductionmentioning

confidence: 99%

PCBs and the energy cost of migration in the European eel (Anguilla anguilla L.)

et al. 2009

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The effect of polychlorinated biphenyls (PCBs) on the energy consum ption of fasting silver European eel (Anguilla anguilla L.) was studied over a 27-day period during w hich the anim als w ere at rest or were sw im m ing 800 km in Blazka sw im tunnels. Three-year-old female hatchery eels (silver stage) betw een 73 and 80 cm long weighing around 1 kg w ere dosed intraperitoneally w ith PCBs at a nom inal dosage of 10x the consum ption standard as a m ixture representative for planar (7 ^gPCB126/kgeel), non-planar (5 m g PCB153/kg eel) and m etabolizable PCBs (50 ^g PCB77/kg eel) found in wild eel, or only w ith the vehicle (corn oil, 10 m l/kg eel). Four m ajor observations were m ade: (1) PCB-exposed anim als lose less w eight com pared to their unexposed controls; (2) PCB-concentrations on a lipid basis are 2.8-14 tim es higher in sw im m ing com pared to resting anim als; (3) the standard m etabolic rate is significantly lower in the PCB-exposed anim als than in unexposed controls. In addition, PCB-exposure significantly reduces oxygen consum ption during swim m ing, and starting at 4 0 0 k m (18 days) this effect increases w ith tim e; (4) the relative spleen and liver w eight significantly increased in the PCB-swim anim als but not in the PCB-rest animals. The sw im m ing anim als lost about 75% m ore w eight com pared to resting anim als and had about 50% lower plasm a fat content. Hematocrit, haem oglobin, plasm a pH, ion levels (sodium and potassium ), and plasm a lactate w ere not affected by PCB-exposure or swim m ing. Apparently, the current levels of PCBs and other dioxin-like com pounds m ay seriously im pair the reproduction of the European eel.

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Hematology patterns of migrating European eels and the role of EVEX virus

Cited by 47 publications

References 20 publications

Comparative Hematological Values, Morphometric and Morphological Observation of the Blood Cell in Capture and Culture Asian Eel, Monopterus albus (Zuiew)

Comparative Hematological Values, Morphometric and Morphological Observation of the Blood Cell in Capture and Culture Asian Eel, Monopterus albus (Zuiew)

Maternal transfer of emerging brominated and chlorinated flame retardants in European eels

PCBs and the energy cost of migration in the European eel (Anguilla anguilla L.)

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