RT info:eu-repo/semantics/article
T1 The ontogeny of greater amberjack digestive and antioxidant defense systems under different rearing conditions: a histological and enzymatic approach
A1 Pérez Pérez, José Antonio
A1 Papadakis, Ioannis E.
A1 Papandroulakis, Nikos
A1 Cruces, Lorenzo
A1 Cotou, Efthimia
A1 Gisbert, Enric
A1 Lorenzo, Antonio
A1 Mylonas, Constantinos C.
A1 Rodríguez, Covadonga
K1 antioxidant enzymes
K1 digestive enzymes
K1 digestive system
K1 greater amberjack larvae
K1 ontogeny
AB An overall synchronization of morphological and physiological ontogenetic events ofthe digestive and antioxidant defence systems occurred in greater amberjack (Serioladumerili) larvae reared under intensive (INT) or semi-intensive (MES) conditions for30 days. The first differentiations of the digestive channel took place at 3–4 dayspost-hatch (dph) (3.6–3.7 mm). Differentiation of the endocrine and exocrine pancreas begun at 4–5 dph (4.0–4.1 mm), coinciding with a decrease in carbohydraseactivity from egg to the onset of exogenous feeding and the maintenance of bilesalt-activated lipase and total alkaline proteases. The first gastric glands and pepsinactivity were evident at 17–20 dph (5.5–6.2 mm) in both fish groups. The appearanceof pyloric caeca had a 5-day delay in the INT compared to the MES larvae (28 versus23 dph). Antioxidant enzyme activities decreased progressively from 7 to 30 dph inboth rearing conditions. However, GPx, SOD at 7 and 18 dph, and GST activities werehigher in the INT larvae. Although both larval groups did not globally differ in somaticgrowth and maturation of digestive function, it seems that the antioxidant defencesystem of MES larvae had to face less oxidative assaults, which may be attributed tolower stressful and more stable culture conditions.
YR 2020
FD 2020
LK http://riull.ull.es/xmlui/handle/915/35424
UL http://riull.ull.es/xmlui/handle/915/35424
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 28-nov-2024