Haematological studies on the prewintering and wintering frog, Rana esculenta

Hematology and serum biochemistry of farmed bullfrog, Lithobates catesbeianus during the active and hibernating periods

“…The cells with the smaller surface have lower metabolic cost per unit of cell mass (Olmo et al, 1989). In this study, the measurements of erythrocytes and their nuclei in bullfrogs during the active period were lower than those during the hibernating period, which were in agreement with the results observed for Rana Esculenta (Sinha, 1983), it was inferred that decrease in size of erythrocytes during the active period might be a physiological adaptation required for quicker blood circulation due to increased physical activity. Prosser (1973) reported that a higher MCH value is due to larger size of the RBCs.…”

“…Some limited previous studies have reported on different hematology and serum biochemistry parameters of several amphibian species, including Rana esculenta (Sinha, 1983), rhacophorid frog (Mahapatra et al, 2012) and dubois's Tree Frog Polypedates teraiensis (Das and Mahapatra, 2014). Hematology and serum biochemistry parameters vary under different pathological, physiological, ecological and environmental conditions in animal population (Llacuna et al, 1996;Sarasola et al, 2004;Seaman et al, 2005).…”

Hematology and serum biochemistry of farmed bullfrog, Lithobates catesbeianus during the active and hibernating periods

“…The cells with the smaller surface have lower metabolic cost per unit of cell mass (Olmo et al, 1989). In this study, the measurements of erythrocytes and their nuclei in bullfrogs during the active period were lower than those during the hibernating period, which were in agreement with the results observed for Rana Esculenta (Sinha, 1983), it was inferred that decrease in size of erythrocytes during the active period might be a physiological adaptation required for quicker blood circulation due to increased physical activity. Prosser (1973) reported that a higher MCH value is due to larger size of the RBCs.…”

“…Some limited previous studies have reported on different hematology and serum biochemistry parameters of several amphibian species, including Rana esculenta (Sinha, 1983), rhacophorid frog (Mahapatra et al, 2012) and dubois's Tree Frog Polypedates teraiensis (Das and Mahapatra, 2014). Hematology and serum biochemistry parameters vary under different pathological, physiological, ecological and environmental conditions in animal population (Llacuna et al, 1996;Sarasola et al, 2004;Seaman et al, 2005).…”

Enhanced erythropoiesis in mice exposed to low environmental temperature

“…There have been several reports of anemia induced by low temperature exposure in ectothermic animals, including leotard frogs (Rana pipiens), European frogs (Rana esculenta) and zebrafish (Danio rerio) (Cline and Waldmann, 1962;Sinha, 1983;Kulkeaw et al, 2010). We also determined the anemia induced by low temperature exposure in the African clawed frog, Xenopus laevis (Maekawa et al, 2012).…”

Hepatic confinement of newly produced erythrocytes caused by low-temperature exposure inXenopus laevis

“…Subsequently, there have been several reports of anemia induced by low-temperature exposure of ectothermic animals. In overwintering European frogs (Rana esculenta), erythrocyte count and hemoglobin levels decrease during winter compared with prewinter values (Sinha, 1983); and in zebrafish (Danio rerio), erythropoiesis is down-regulated during low-temperature exposure (Kulkeaw et al, 2010). Hematopoietic responses to environmental temperature have also been reported in endothermic animals.…”

Hematology and serum biochemistry of farmed bullfrog, Lithobates catesbeianus during the active and hibernating periods

“…The cells with the smaller surface have lower metabolic cost per unit of cell mass (Olmo et al, 1989). In this study, the measurements of erythrocytes and their nuclei in bullfrogs during the active period were lower than those during the hibernating period, which were in agreement with the results observed for Rana Esculenta (Sinha, 1983), it was inferred that decrease in size of erythrocytes during the active period might be a physiological adaptation required for quicker blood circulation due to increased physical activity. Prosser (1973) reported that a higher MCH value is due to larger size of the RBCs.…”

“…Some limited previous studies have reported on different hematology and serum biochemistry parameters of several amphibian species, including Rana esculenta (Sinha, 1983), rhacophorid frog (Mahapatra et al, 2012) and dubois's Tree Frog Polypedates teraiensis (Das and Mahapatra, 2014). Hematology and serum biochemistry parameters vary under different pathological, physiological, ecological and environmental conditions in animal population (Llacuna et al, 1996;Sarasola et al, 2004;Seaman et al, 2005).…”

Enhanced erythropoiesis in mice exposed to low environmental temperature

“…There have been several reports of anemia induced by low temperature exposure in ectothermic animals, including leotard frogs (Rana pipiens), European frogs (Rana esculenta) and zebrafish (Danio rerio) (Cline and Waldmann, 1962;Sinha, 1983;Kulkeaw et al, 2010). We also determined the anemia induced by low temperature exposure in the African clawed frog, Xenopus laevis (Maekawa et al, 2012).…”

Hepatic confinement of newly produced erythrocytes caused by low-temperature exposure inXenopus laevis

“…Subsequently, there have been several reports of anemia induced by low-temperature exposure of ectothermic animals. In overwintering European frogs (Rana esculenta), erythrocyte count and hemoglobin levels decrease during winter compared with prewinter values (Sinha, 1983); and in zebrafish (Danio rerio), erythropoiesis is down-regulated during low-temperature exposure (Kulkeaw et al, 2010). Hematopoietic responses to environmental temperature have also been reported in endothermic animals.…”

Hematology and serum biochemistry of farmed bullfrog, Lithobates catesbeianus during the active and hibernating periods

“…The cells with the smaller surface have lower metabolic cost per unit of cell mass (Olmo et al, 1989). In this study, the measurements of erythrocytes and their nuclei in bullfrogs during the active period were lower than those during the hibernating period, which were in agreement with the results observed for Rana Esculenta (Sinha, 1983), it was inferred that decrease in size of erythrocytes during the active period might be a physiological adaptation required for quicker blood circulation due to increased physical activity. Prosser (1973) reported that a higher MCH value is due to larger size of the RBCs.…”

“…Some limited previous studies have reported on different hematology and serum biochemistry parameters of several amphibian species, including Rana esculenta (Sinha, 1983), rhacophorid frog (Mahapatra et al, 2012) and dubois's Tree Frog Polypedates teraiensis (Das and Mahapatra, 2014). Hematology and serum biochemistry parameters vary under different pathological, physiological, ecological and environmental conditions in animal population (Llacuna et al, 1996;Sarasola et al, 2004;Seaman et al, 2005).…”

Enhanced erythropoiesis in mice exposed to low environmental temperature

“…There have been several reports of anemia induced by low temperature exposure in ectothermic animals, including leotard frogs (Rana pipiens), European frogs (Rana esculenta) and zebrafish (Danio rerio) (Cline and Waldmann, 1962;Sinha, 1983;Kulkeaw et al, 2010). We also determined the anemia induced by low temperature exposure in the African clawed frog, Xenopus laevis (Maekawa et al, 2012).…”

Hepatic confinement of newly produced erythrocytes caused by low-temperature exposure inXenopus laevis

“…Subsequently, there have been several reports of anemia induced by low-temperature exposure of ectothermic animals. In overwintering European frogs (Rana esculenta), erythrocyte count and hemoglobin levels decrease during winter compared with prewinter values (Sinha, 1983); and in zebrafish (Danio rerio), erythropoiesis is down-regulated during low-temperature exposure (Kulkeaw et al, 2010). Hematopoietic responses to environmental temperature have also been reported in endothermic animals.…”