Change of growth performance, hematological parameters, and plasma component by hexavalent chromium exposure in starry flounder, Platichthys stellatus

Abstract

The study investigated the changes in growth performance, hematological parameters, plasma components, and stress indicators of juvenile starry flounder, Platichthys stellatus, depending on varying exposure to hexavalent chromium. P. stellatus was exposed to waterborne chromium at 0, 50, 100, 200, and 400 ppb for 4 weeks. The result showed that Cr exposure resulted in decreased daily length gain (DLG), daily weight gain (DWG), condition factor (CF), and hepatosomatic index (HIS) in P. stellatus. In terms of hematological parameters, red blood cell (RBC) count, hematocrit (Ht), and hemoglobin (Hb) significantly decreased at 400 ppb after 2 weeks. In terms of plasma components, inorganic analysis was unchanged and cholesterol, an organic component, considerably increased at 400 ppb after 4 weeks. Plasma enzyme components including glutamic oxalate transaminase (GOT) and glutamic pyruvate transaminase (GPT) were significantly increased. Stress indicators such as cortisol and glucose were notably increased over 100 ppb after 4 weeks with increasing chromium concentration. The results indicate that exposure to waterborne Cr induced toxic effects on growth, hematological parameters, plasma components, and stress indicators.

Time-Dependent Naphthalene Toxicity in Anabas testudineus (Bloch): A Multiple Endpoint Biomarker Approach

“…Naphthalene exposure in this study showed a diverse transient effect on calcium metabolism and homeostasis. , During short-term exposure, lower calcium content may be possibly due to enhanced calcium excretion . Similar findings have also been reported by Ko et al in Platichthys stellatus under chromium exposure. As time proceeds (after 5 d), the calcium level gradually increased, which indicated that naphthalene might have influenced the hypercalcemic hormone from the pituitary gland. , Generally, prolactin serves as a precursor of hypercalcemic hormone in teleosts , to improve the calcium reserve.…”

“…54,55 During short-term exposure, lower calcium content may be possibly due to enhanced calcium excretion. 41 Similar findings have also been reported by Ko et al 56 in Platichthys stellatus under chromium exposure. As time proceeds (after 5 d), the calcium level gradually increased, which indicated that naphthalene might have influenced the hypercalcemic hormone from the pituitary gland.…”

“…Higher the naphthalene dose, higher was the response, that is, under T2 dose. Serum glucose is a reliable biomarker of xenobiotic exposure including PAHs and is generally increased by carbohydrate metabolism . A gradual increase in the glucose level was indicative of intensive glycogenolysis (a process of releasing glucose into blood by breakdown of energy reserves, namely, proteins and HDL stored as glycogen in the liver and muscle), initiated generally by adrenocorticotrophic and glucagon hormones such as cortisol, glucose 6-phosphatase, catecholamines, and so forth. − Additionally, higher glucose level indicated higher stress condition as adaptive responses.…”

Manganese, Iron, Lead, and Zinc Levels and Haematological Profile among Welders in Bibiani Anhwiaso Bekwai District, Ghana

“…Hematological parameters such as RBC count, hematocrit value, and Hb profile are sensitive indicators of heavy metal stress on metabolism [ 38 ]. In the present study, although heavy metal levels were comparable between the two groups, the consistent rise or fall in the complete blood count parameters for the welders, though not significant, suggests some level of effect on these welders, which may be present in a larger sample size.…”

Evaluation of Growth Performance and Bioaccumulation Pattern of Metals in Catfish Species, Channa marulius and Wallago attu under Cadmium and Chromium Toxicity

“…Ayegbusi et al (2018) noted the decreased SGR of Clarias gariepinus with increase in PbCl2 sub-lethal concentrations for three weeks. Ko et al (2019) observed the decrease in daily weight gain, condition factor and daily length gain of Platichthys stellatus when exposed to four different concentrations of waterborne Cr for 4 weeks. The decline in growth and length of Cyprinus carpio due to Cr exposure was reported by Shaheen and Jabeen (2015).…”