Gill Morphology and Na+/K+-ATPase Activity of Gobionellus oceanicus (Teleostei: Gobiidae) in an Estuarine System

Autor: André Luis da Cruz, Marisa Narciso Fernandes, Helena Rachel da Mota Araujo
Rok vydání: 2018
Předmět:
Zdroj: Biological Trace Element Research. 187:526-535
ISSN: 1559-0720
0163-4984
DOI: 10.1007/s12011-018-1393-z
Popis: Gobionellus oceanicus is a species widely distributed on the Atlantic coast and may be susceptible to anthropic effects. This study evaluated the morphology and the Na+/K+-ATPase activity of G. oceanicus gills considering the concentration of metals in the fish and Subae River estuary. Although the metal concentrations detected in the water and sediment did not exceed certain limits, CONAMA (Brazilian Environment Council), TEL (Threshold Effect Level), and PEL (Probable Effect Level), the metals levels in gills plus muscle and skin of G. oceanicus were above the permitted setting of the Ministry of Health, Brazil. The pavement epithelial cells (PVC) of the gill filament was observed that there were long microridges either in the apical surface or in the lamella; especially, microridges degeneration was shown in some PVC from filament epithelium. The number of ionocyte and the volume density were (0.02 ± 0.001)/μm and (0.38 ± 0.27) %, respectively. The activity of Na+/K+-ATPase was 1.13 ± 0.76 μM Pi mg protein−1 h−1. We describe the volume density and number of ionocytes and Na+/K+-ATPase enzymatic activity in G. oceanicus for the first time, which is useful for basic and comparative future studies to support aquatic biomonitoring.
Databáze: OpenAIRE
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