Caudal neurosecretory system is an additional neuroendocrine system found in fishes. Great variation has been observed among different groups of fishes, so far its organization is concerned. Much work has been undertaken on the caudal neurosecretory system of elasmobranchs and teleosts. large size scattered Dahlgren cells in the posterior end of spinal cord, corresponding to last few vertebrae,...

This study aimed to analyze the cold stress effects (in terms of hematology, energy reserves, and oxidative stress) in Piaractus mesopotamicus (pacú) their mitigation by a Pyropia columbina red seaweed-supplemented diet. For this purpose, juvenile fish were fed with control (CD) or diet (RD) for 60 days, then, animals exposed low temperature (14 °C) (24 24 h. The shock generated an increase hem...

Pacu ( Piaractus mesopotamicus ) is one of the most important fish farmed species in Brazil due to its hardy, fast growing, omnivorous feeding behavior, and good consumers acceptance. However, studies on effect different slaughtering procedures quality frozen pacu fillets have not been carried out. Therefore, this study aimed evaluate electrical stunning, CO 2 narcosis, or water/ice immersion (...