Seasonal environmental parameters influence biochemical responses of the fiddler crab Minuca rapax to contamination in situ

Time-dependent hematological responses of Nile tilapia Oreochromis niloticus exposed to an estuarine contaminated water

“…Fish immunosuppression can be caused by several aquatic contaminants, such as pesticides (Li et al, 2011), PAHs (Dunier & Siwick, 1993), and heavy metals (Witeska, 2005;Authman et al, 2015), as well as the toxins of Escherichia coli, a bacteria that is usually found in the vertebrate gut and that is taken as a typical indicator of domestic sewage aquatic contamination (Yacoub et al, 2018). Earlier studies have demonstrated that the study area is highly impacted by domestic and industrial sewage, resulting in alterations of microbiological parameters and serious contamination in water, which is aggravated by the entrapment of these compounds in the place for long periods because of the estuary's hydrodynamics (Roversi et al, 2016), as well as for the retention potential to xenobiotic particles from sediments (CETESB, 2017;Capparelli et al, 2019).…”

“…In this area, the presence of phosphorus, nitrogen, organic carbon, metals (e.g. arsenic, copper and mercury), polycyclic aromatic hydrocarbons (PAHs) and Enterococci were in concentrations above the limits recommended by the Brazilian environmental legislation (Conselho Nacional do Meio Ambiente [CONAMA], 2005), evidencing the quality deterioration in both water and sediments compartments (CETESB, 2017, Capparelli, Gusso-Choueri, Abessa, & McNamara, 2019. Some studies have evidenced that the presence of contaminants in the Santos-São Vicente Estuary region may promote marked changes in hematological parameters in fat snook (Centropomus paralellus) (Seriani et al, 2013) and in lined sole (Achirus lineatus) (Prado et al, 2015), and that these effects were strongly related to seasonal variations in water quality.…”

Combined effects of temperature and copper on oxygen consumption and antioxidant responses in the mudflat fiddler crab Minuca rapax (Brachyura, Ocypodidae)

“…Fiddler crabs are remarkably tolerant of natural variations in salinity and temperature (Baldwin and Kirschner, 1976, Graszynski and Bigalke, 1986, Zanders and Rojas, 1996Faria et al, 2017) but are sensitive to pollution-induced stress (Zanders and Rojas, 1996;Capparelli et al, 2016;Capparelli et al, 2019). The mudflat fiddler crab Minuca rapax (Crustacea, Ocypodidae) is distributed from Florida (USA) to southern Brazil, including the Gulf of Mexico, the Antilles and Venezuela, and from Pará to Santa Catarina state in Brazil (Thurman et al, 2013).…”

“…Minuca rapax encounters ample daily and seasonal variations in salinity (Thurman, 2003;Faria et al, 2017) and temperature (Faria et al, 2017) and resists environmental contamination (Capparelli et al, 2016(Capparelli et al, , 2017 for which it is an excellent model species. In the laboratory, M. rapax survives high copper concentrations (500 μg Cu L −1 , Capparelli et al, 2017) and is present in estuaries highly contaminated by metals and polyaromatic hydrocarbons, such as the Santos Estuarine System (Capparelli et al, 2019), a critically polluted area in southeastern Brazil. Despite the abundance of M. rapax in such chronically contaminated regions, and its resistance to high metal concentrations, the crab does show osmoregulatory and metabolic impairment when exposed experimentally to copper (Capparelli et al, 2017) and to metal contamination in situ (Capparelli et al, 2016).…”

“…Despite the abundance of M. rapax in such chronically contaminated regions, and its resistance to high metal concentrations, the crab does show osmoregulatory and metabolic impairment when exposed experimentally to copper (Capparelli et al, 2017) and to metal contamination in situ (Capparelli et al, 2016). Fluctuations in precipitation and salinity also influence the crab's antioxidant responses in addition to those caused by contamination in situ (Capparelli et al, 2019).…”