Seasonal variation in osmoregulatory and metabolic parameters in earthen pond-cultured gilthead sea breamSparus auratus

Vargas‐Chacoff, Luis; Arjona, Francisco J.; Ruíz-Jarabo, Ignacio; Páscoa, Inês; Gonçalves, Odete; Río, María P. Martín del; Mancera, Juan Miguel

doi:10.1111/j.1365-2109.2009.02226.x

Cited by 38 publications

(39 citation statements)

References 31 publications

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“…Under these conditions there is a tendency in A. regius specimens to mobilize fat deposits, which may explain the observed enhancement in plasma triglyceride values. This situation agrees with previous results reported in S. aurata in winter (Tort et al 1998, 2004, Gallardo et al 2003, Vargas-Chacoff et al 2009a). Finally, plasma proteins levels increased previous to each important growth increase period (spring), and decreased during summer months, supporting muscle (somatic) growth.…”

Section: Discussionsupporting

confidence: 83%

“…In plasma, glucose showed its lowest values in spring and summer, while lactate showed its lowest levels in spring and autumn. These results are different from those described for other species, such as S. aurata (Gómez-Milán et al 2007, Vargas-Chacoff et al 2009a and Oreochromis mossambicus (Fiess et al 2007). In the present study, the lowest glucose or lactate concentrations in these months are associated with changes in hepatic parameters related to glucose or lactic acid metabolism (see below), and could indicate a reduction in the hepatic capacity to produce these metabolites, focusing these resources into somatic growth (Foster andMoon 1991, Sala-Rabanal et al 2003).…”

Section: Discussioncontrasting

confidence: 55%

“…Finally, plasma proteins levels increased previous to each important growth increase period (spring), and decreased during summer months, supporting muscle (somatic) growth. A similar situation has been reported for S. aurata (Chaves-Pozo et al 2008, Vargas-Chacoff et al 2009a. observed in specimens of S. aurata an inverse pattern of variation in plasma amino acids levels with respect to environmental temperature (with the lowest values in cool months and the highest in warm months).…”

Section: Discussionsupporting

confidence: 55%

“…In the present study, the lowest glucose or lactate concentrations in these months are associated with changes in hepatic parameters related to glucose or lactic acid metabolism (see below), and could indicate a reduction in the hepatic capacity to produce these metabolites, focusing these resources into somatic growth (Foster andMoon 1991, Sala-Rabanal et al 2003). In addition, in spring (April) plasmatic levels of proteins, triglycerides (TAG) and liver glycogen increased, while HSI decreased (probably due to hepatic TAG mobilization), followed by a depletion in plasma glucose, proteins and TAG as well as liver glycogen (May-July), which may also be related to an acceleration in the growth of the animals (Gallardo et al 2003, Ibarz et al 2005, Vargas-Chacoff et al 2009a. In winter (November), metabolic pathways have to confront a critical situation due to lower temperatures (Somero 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Low water temperatures could induce fasting in cultured species, modifying their metabolic status and triggering an allostatic overload (Polakof et al 2006, Estévez et al 2011, as occurs in the gilthead seabream (Sparus aurata) (Ibarz et al 2010). On the other hand, short but intensive rainfall in autumn/winter (usual in southwestern Spain) can decrease water salinity in earthen ponds, inducing osmotic and consequently metabolic challenges in cultured fish (Vargas-Chacoff et al 2009a). To the best of our knowledge, metabolic approaches have not been performed in A. regius.…”

Section: Introductionmentioning

confidence: 99%

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Yearly growth and metabolic changes in earthen pond-cultured meagre Argyrosomus regius

Vargas‐Chacoff¹,

Ruíz-Jarabo²,

Páscoa³

et al. 2014

Sci. Mar.

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Summary:Metabolic modifications associated with natural environmental conditions were assessed in the meagre Argyrosomus regius cultured in earthen ponds under natural photoperiod and temperature. Juvenile specimens (90-100 g initial weight) were sampled (plasma, liver and muscle) every two months for 18 months (between December 2004 and May 2006). Specimens showed seasonal variations in growth rate, with the highest values in spring and summer. Plasmatic, hepatic and muscular metabolite levels and hepatic and muscular metabolic enzymes also showed significant variations throughout the year. Enzymatic activity related to carbohydrate metabolism in the liver (HK, FBPase and G6PDH) showed great modifications in summer, increasing glycogenogenic pathways, while amino acid metabolism (GDH and GOT activity) was enhanced in spring and summer. However lipid-related (G3PDH activity) metabolic enzymes did not show a clear seasonal pattern. In muscle, enzymatic activity related to amino acid, lipid and lactate metabolism (LDH-O activity), but not carbohydrate metabolism, showed seasonal changes in parallel with changes in growth rate. Thus A. regius specimens showed a trend to grow in summer months and mobilize their energy reserves in winter. Differences in the hepatic level were observed between the first and the second year of the study, suggesting the possible existence of metabolic changes related to specimen age or size. Our results indicate that growth and metabolic responses in A. regius are environmentally dependent and that this species is a very good candidate for diversification in aquaculture.Keywords: Argyrosomus regius; energy; growth; metabolic parameters; ponds; seasons. Crecimiento y cambios metabólicos anuales en corvina Argyrosomus regius cultivada en esterosResumen: Modificaciones metabólicas asociadas a condiciones ambientales temporales fueron evaluadas en la corvina Argyrosomus regius, cultivadas en esteros con fotoperiodo y temperatura natural. Ejemplares juveniles (90-100 g de peso inicial) fueron muestreados (plasma, hígado y músculo) cada dos meses durante 18 meses (entre diciembre de 2004 y mayo de 2006). Las muestras mostraron variaciones estacionales en la tasa de crecimiento, con valores más altos durante la primavera y el verano. Niveles de metabolitos plasmáticos, hepáticos y musculares, así como las actividades de enzimas metabólicas hepáticas y musculares también presentaron variaciones significativas a lo largo del año. La actividad enzimática relacionada con el metabolismo de carbohidratos en el hígado (HK, FBPasa y G6PDH) mostró altas modificaciones en el verano, el aumento de las vías glucogenogénicas, mientras el metabolismo de aminoácidos (actividades de GDH y GOT) se incrementó en temporadas de primavera y verano. Sin embargo la actividad de G3PDH (enzima metabólica relacionada con los lípidos) no mostró un claro patrón estacional. En el músculo, la actividad enzimática respecto a los aminoácidos, lípidos y el metabolismo del lactato (LDH-O) presentó cambios estacionales en paral...

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Section: Discussionsupporting

confidence: 83%