First hematologic and serum biochemistry record of black drum Pogonias cromis (Linnaeus, 1766) in a Neotropical hypersaline Lagoon
1Laboratory of Applied Ecology, Department of Zootechny and Sustainable Socioenvironmental Development, Fluminense Federal University (UFF), Rua Vital Brazil Filho, 64, CEP 24230-340, Niterói, RJ, Brazil.
2 Department of Veterinary Medicine and Pathology, Veterinary College, Fluminense Federal University, Niterói, RJ, Brazil.
3Federal University of Rio de Janeiro, UFRJ. Institute of Biology. Department of Marine Biology, Rio de Janeiro, RJ, Brazil.
Research Article
World Journal of Biology Pharmacy and Health Sciences, 2021, 05(01), 019-026.
Article DOI: 10.30574/wjbphs.2021.5.1.0107
Publication history:
Received on 14 December 2020; revised on 21 December 2020; accepted on 23 December 2020
Abstract:
This study is a pioneer in describing the first hematological parameters and serum biochemistry record of black drum, Pogonias cromis (Linnaeus, 1766) in a Neotropical hypersaline Lagoon. We collected a total of 32 individuals of P. cromis, with a total length (TL) ranging between 160 and 710mm, and total weight (TW) ranging between 24 and 39.8g. Blood samples were taken and the presence of granulocytes, lymphocytes, and monocytes indicated that P. cromis had developed an immune system. Increased levels of thrombocytes with decreased levels of the lymphocytes, may be due to an increased frequency of lymphocytes among the leukocytes, which is also seen in the trend of higher levels of lymphocytes associated with an increased leukocyte count. The mean count of red blood cells (1.97 ± 0.07 106 mm³) was relatively low, whilst the hematocrit (37.4 ± 0.9%) and mean corpuscular volume (195.8 ± 1.9 fL) were higher when compared with those of other species of marine fish. High total plasma protein values (6.3 ± 0.1 g/dL) suggest an osmotic imbalance, which could be due to the stress of the environment. The relatively high values of ALT and AST (90 ± 0.7 and 229 ± 4.5 U/L, respectively) and urea (24.7 ± 0.6 mg/dL), and the low levels of creatinine (0.10 ± 0.02 mg/dL), suggest possible liver dysfunction in this species in this ecosystem. This work indicates the use of hematological analysis of P. cromis could be used as an effective biomarker for environmental risk assessments.
Keywords:
Scianidae; Araruama Lagoon; Generalized additive models (GAMs)
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