Effects of aluminum on the energetic substrates in neotropical freshwater Astyanax bimaculatus (Teleostei: Characidae) females

The role of ovarian steroids in reproductive plasticity in Hoplias malabaricus (Teleostei: Characiformes: Erythrinidae) in tropical reservoirs with different degrees of pollution

“…In general, the presence of pollutants in the water inhibits fish metabolic processes, leading to a reduction in ovarian lipid content (Kime, 1995), as observed in Astyanax bimaculatus, a teleost with group-synchronous oocyte development (Vieira et al, 2013). However, in Oreochromis niloticus, a species with asynchronous oocyte development, the exposure to metals results in an intense hepatic mobilization of lipids to the ovaries, which helps prioritize and anticipate the reproductive process under unfavorable conditions (Correia et al, 2010).…”

“…However, in contrast to PN females, the fecundity and histological analyses of the ovaries indicate the presence of early vitellogenic oocytes in BIL females in winter, suggesting precocity in the vitellogenic phase of these animals compared to the reference site. These data were initially intriguing, inasmuch as in polluted environments it is common to find delays or inhibition of gonadal maturation (Jobling et al, 2002;Robinson et al, 2003;Segner et al, 2003;Mills and Chichester, 2005;Prado et al, 2011;Vieira et al, 2013). However, during winter, BIL females have twofold higher plasma 11-KT levels than PN females.…”

“…The impact of water pollution on fish and other aquatic communities has been well documented in various neotropical watersheds (Mangeaud, 1998;Pompeu and Alves, 2003;Cazenave et al, 2005;Hued et al, 2006;Kirschbaum et al, 2009;Fedato et al, 2010), and many laboratory studies have examined the effects of exposure to specific chemicals on fish physiology (Jones and Reynolds, 1997;Robinson et al, 2003;Correia et al, 2010;Simonato et al, 2011;Nascimento et al, 2012;Vieira et al, 2013). However, only few studies have evaluated the effects of pollution present in rivers and reservoirs on fish reproductive physiology.…”

Mobilization of energetic substrates in the endangered catfish Steindachneridion parahybae (Siluriformes: Pimelodidae): changes in annual reproductive cycle in captivity

“…These studies evaluated, for instance: (1) the reproductive cycle or reproductive performance of fish in captivity (Izquierdo et al, 2001); (2) larval, juvenile, and adult nutrition (Sargent et al, 1995(Sargent et al, , 1999Izquierdo et al, 2001;Andrade et al, 2010;Araújo et al, 2012); (3) smoltification (Björnsson et al, 2011); (4) trophic interrelationship (Lowe-McConnell, 1999;Bittar et al, 2012); and (5) effects of pollutants on energetic substrates (Lima et al, 2011;Vieira et al, 2013). Besides, in several fish species that are candidates for aquaculture, deposition of adequate energetic substrates in the tissues, as liver and ovaries, are essential for a good reproductive performance, successful egg mass, and fingerling production (Fernández-Palacios et al, 2011).…”

Potencial mitigador do óleo de cravo sobre as respostas fisiológicas ao estresse de exposição aérea e de transporte no lambari, <i>Astyanax altiparanae</i> (GARUTTI &amp; BRITSKI, 2000)

“…Para a espécie Rhamdia quelen a peroxidação lipídica foi reduzida no tecido muscular e hepático de peixes submetidos ao transporte de 6 horas sob anestesia com A. triphylla (ZEPPENFELD et al, 2014). Para a mesma espécie, o uso Lippia alba durante o transporte de 6 horas não evitou a peroxidação lipídica no fígado (SALBEGO et al, Resultados semelhantes ao do presente trabalho foram relatados para B. cephalus expostos a organofosforados, e para A. bimaculatus expostos ao alumínio (MONTEIRO et al, 2006;VIEIRA;CORREIA;MOREIRA, 2013). O sal é descrito como uma substância que regula a homeostase e protege o corpo do peixe, auxiliando na produção de muco, entretanto sua administração na água de transporte é feita de forma aleatória pelos produtores (MAZIC; SIMCO;PARKER, 1991;WURTS, 1995;GOMES et al, 2003b).…”