Effects of dorsal aortic cannulation on the respiration and haematology of mediterranean living Scyliorhinus canicula L.

The effects of sublethal concentrations of cadmium on haematological parameters in the dogfish, Scyliorhinus canicula

“…Nevertheless, a leucocytosis has been observed in S. canicula after zinc treatment (Flos et al, 1987) or endosulphan aerial spraying (Matthiessen,198 1). In the present experiment, there was a progressive leucncrit decrease, as occurred in previous works using the same technique (McLeay & Gordon, 1977;Wedemeyer et al, 1983;Duthie & Tort, 1985). However, leucocrit is only an approximate parameter, because leucocytes include a number of white blood cell populations that can behave differently in response to a stressor; thus differential leucocyte counts are more informative.…”

The effects of sublethal concentrations of cadmium on haematological parameters in the dogfish, Scyliorhinus canicula

“…Nevertheless, a leucocytosis has been observed in S. canicula after zinc treatment (Flos et al, 1987) or endosulphan aerial spraying (Matthiessen,198 1). In the present experiment, there was a progressive leucncrit decrease, as occurred in previous works using the same technique (McLeay & Gordon, 1977;Wedemeyer et al, 1983;Duthie & Tort, 1985). However, leucocrit is only an approximate parameter, because leucocytes include a number of white blood cell populations that can behave differently in response to a stressor; thus differential leucocyte counts are more informative.…”

Cortisol and haematological response in sea bream and trout subjected to the anaesthetics clove oil and 2-phenoxyethanol

“…However, an increase in red blood cell number in trout at the concentration of 0.1 mL L −1 and a parallel increase in the haemoglobin concentration was observed (Table 1). This increase may result from the release of immature red cells by the spleen, as the mean volume shows lower values, as shown in other studies (Duthie & Tort 1985). As the fish were subjected to capture stress, this release could be an immediate response to this acute stress or be mediated by catecholamine release.…”

Hypoxia acclimation protects against oxidative damage and changes in prolactin and somatolactin expression in silver catfish (Rhamdia quelen) exposed to manganese

“…Considering that hematological variations constitute an index of health status in a number of fish species (Blaxhall, 1972;Aubin et al, 2001), such changes have been observed following stress conditions as pollutants exposure, toxic metals, diseases and hypoxia (Duthle and Tort, 1985;Barnhoorn and van Vuuren, 2001). In this sense, our findings revealed that hypoxia acclimation increased the hemoglobin concentration of silver catfish, however, this effect was not maintained after Mn exposure.…”

The effects of sublethal concentrations of cadmium on haematological parameters in the dogfish, Scyliorhinus canicula

“…Nevertheless, a leucocytosis has been observed in S. canicula after zinc treatment (Flos et al, 1987) or endosulphan aerial spraying (Matthiessen,198 1). In the present experiment, there was a progressive leucncrit decrease, as occurred in previous works using the same technique (McLeay & Gordon, 1977;Wedemeyer et al, 1983;Duthie & Tort, 1985). However, leucocrit is only an approximate parameter, because leucocytes include a number of white blood cell populations that can behave differently in response to a stressor; thus differential leucocyte counts are more informative.…”

Cortisol and haematological response in sea bream and trout subjected to the anaesthetics clove oil and 2-phenoxyethanol

“…However, an increase in red blood cell number in trout at the concentration of 0.1 mL L −1 and a parallel increase in the haemoglobin concentration was observed (Table 1). This increase may result from the release of immature red cells by the spleen, as the mean volume shows lower values, as shown in other studies (Duthie & Tort 1985). As the fish were subjected to capture stress, this release could be an immediate response to this acute stress or be mediated by catecholamine release.…”

Hypoxia acclimation protects against oxidative damage and changes in prolactin and somatolactin expression in silver catfish (Rhamdia quelen) exposed to manganese

“…Considering that hematological variations constitute an index of health status in a number of fish species (Blaxhall, 1972;Aubin et al, 2001), such changes have been observed following stress conditions as pollutants exposure, toxic metals, diseases and hypoxia (Duthle and Tort, 1985;Barnhoorn and van Vuuren, 2001). In this sense, our findings revealed that hypoxia acclimation increased the hemoglobin concentration of silver catfish, however, this effect was not maintained after Mn exposure.…”

The effects of sublethal concentrations of cadmium on haematological parameters in the dogfish, Scyliorhinus canicula

“…Nevertheless, a leucocytosis has been observed in S. canicula after zinc treatment (Flos et al, 1987) or endosulphan aerial spraying (Matthiessen,198 1). In the present experiment, there was a progressive leucncrit decrease, as occurred in previous works using the same technique (McLeay & Gordon, 1977;Wedemeyer et al, 1983;Duthie & Tort, 1985). However, leucocrit is only an approximate parameter, because leucocytes include a number of white blood cell populations that can behave differently in response to a stressor; thus differential leucocyte counts are more informative.…”

Cortisol and haematological response in sea bream and trout subjected to the anaesthetics clove oil and 2-phenoxyethanol

“…However, an increase in red blood cell number in trout at the concentration of 0.1 mL L −1 and a parallel increase in the haemoglobin concentration was observed (Table 1). This increase may result from the release of immature red cells by the spleen, as the mean volume shows lower values, as shown in other studies (Duthie & Tort 1985). As the fish were subjected to capture stress, this release could be an immediate response to this acute stress or be mediated by catecholamine release.…”

Hypoxia acclimation protects against oxidative damage and changes in prolactin and somatolactin expression in silver catfish (Rhamdia quelen) exposed to manganese

“…Considering that hematological variations constitute an index of health status in a number of fish species (Blaxhall, 1972;Aubin et al, 2001), such changes have been observed following stress conditions as pollutants exposure, toxic metals, diseases and hypoxia (Duthle and Tort, 1985;Barnhoorn and van Vuuren, 2001). In this sense, our findings revealed that hypoxia acclimation increased the hemoglobin concentration of silver catfish, however, this effect was not maintained after Mn exposure.…”