Gill remodeling in three freshwater teleosts in response to high environmental ammonia

Effects of high ammonia concentrations on three cyprinid fish: Acute and whole-ecosystem chronic tests

“…An exposure test of goldfish, Carassius auratus (highly ammonia-resistant cyprinid), suggested that the posterior sides of the lamellae may play a role in the inter-lamellar cell mass´capacity to hinder branchial ammonia excretion (Perry et al, 2010b;Smith et al, 2012). Thickening of filaments and lamellae in the form of enlargement of inter-lamellar cell mass as observed in our study has also been found for common carp, Cyprinus carpio (a less ammonia-sensitive cyprinid), clearly for goldfish, and although less clear and very slowly (Sinha et al, 2014) even for rainbow trout, Oncorhynchus mykiss (highly ammonia sensitive). Histological changes probably affect chronic parameters like physiological condition or fitness of fish (see e.g.…”

Integrative approach of histopathology and histomorphometry of common carp (Cyprinus carpioL.) organs as a marker of general fish health state in pond culture

“…Epithelial cells hyperplasia is one of the basic defence mechanisms in regards to various stressors. This results in an increase in the diffusion distance between blood and water (Sinha, Matey, Giblen, Blust & De Boeck ). This lesion had the largest contribution in I G , with a moderate importance in HP.…”

High environmental ammonia elicits differential oxidative stress and antioxidant responses in five different organs of a model estuarine teleost ( Dicentrarchus labrax )

“…High environmental ammonia (HEA) is a worldwide concern as it may affect the performance of fish in several ways. HEA induces a range of ecotoxicological effects in fish, including a decrease in growth rate (Dosdat et al, 2003;Sinha et al, 2012a), alteration in energy metabolism (Arillo et al, 1981;Sinha et al, 2012aSinha et al, , 2015, disruption of ionic balance (Wilkie, 1997;Sinha et al, 2012bSinha et al, , 2014aSinha et al, , 2015Diricx et al, 2013), alterations in hormone regulation (Knoph and Olsen, 1994;Dosdat et al, 2003), increase vulnerability to diseases, and even mortality. To protect against ammonia toxicity, various defensive strategies have been reported in freshwater and marine teleosts (Ip et al, 2001(Ip et al, , 2004a.…”