The regulation of endogeneous energy stores during starvation and refeeding in the somatic tissues of the golden perch

Abstract

Adult golden perch Macquaria ambigua were fed to satiety, starved for up to 210 days, or starved for 150 days then fed to satiety for 60 days to investigate the utilization of energy stores in response to food deprivation and re-feeding. Golden perch sequentially mobilize energy from hepatic tissue, extra-hepatic lipid, and finally muscle components in response to food deprivation. The relative size of the liver was significantly reduced by 30 days after the onset of food deprivation due to the simultaneous mobilization of lipid, protein and glycogen reserves. These stores were renewed rapidly within 30 days by satiety feeding. Mobilization of lipid stores in perivisceral fat bodies occurred between 30 and 60 days of food deprivation. These deposits were also renewed upon re-feeding, although not as rapidly as liver reserves. The glycogen content of the epaxial muscle was reduced by the 60th day of food deprivation but subsequently increased indicating the mobilization of other energy reserves. The concentration of muscle lipid decreased after 90 days of food deprivation. The only significant response in body composition observed in the fish fed to satiety throughout the study was an increase in the relative size of the perivisceral fat bodies. The results of this study suggest that golden perch are well adapted to cope with extended periods of food deprivation, storing energy as perivisceral fat when food is readily available and having a clearly sequential process for mobilizing energy when food is scarce which largely protects the integrity of the musculature. C) 1995 The Fisheries Society of the British Islo

Supplementation of four non-conventional aquatic weeds to the basal diet of <I>Catla catla</I> and <I>Cirrhinus mrigala</I> fingerlings: Effect on growth, protein utilization and body composition of fish

“…Except the glycogen level in the muscle of C. mrigala, both the fish groups revealed high glycogen level in their liver as well as in muscle tissues. It is well known that elevation in glycogen level helps the fish as an energy storehouse during prolonged starvation (Collins and Anderson 1995) and glycogen is the stored food materials for animals.…”

Lipidos Totales en La Musculatura De Pinguipes Chilensis Valenciennes 1833 (Perciformes, Pinguipedidae)

“…Hembras Machos p Anterior (ct) 1,27 (2,98) 0,37 (0,20) 0,83 Media (ct) 1,93 (3,31) 0,49 (0,42) 0,34 Media (st) 2,08 (4,59) 1,43 (2,34) 0,77 Posterior (ct) 0,22 (0,19) 0,47 (0,69) 0,55 acumulación de lípidos depende directamente de la adquisición de alimento (Collins & Anderson 1995;Shulman & Love 1999), y la energía adquirida en ésta y almacenada en el músculo no muestra variaciones, puede estar indicando una importancia del hígado como principal sitio de almacenaje de reservas de energía en P. chilensis, como ha sido determinado en otras especies (Love 1980, Haug 1990) o una movilización continua de la energía almacenada en procesos de maduración, lo que no reflejaría diferencias del porcentaje de lípidos en la musculatura.…”

“…La composición química de diferentes tejidos puede variar considerablemente, especialmente en el contenido de lípidos y agua (Haug 1990). Durante períodos de alta ingesta los lípidos pueden ser almacenados en el tejido somático y el hígado, así como en torno a las vísceras (Hoque et al 1998, Collins & Anderson 1995, por lo que los lípidos pueden ser usados como marcadores de condición, ya que pueden mostrar períodos de ciclos anuales asociados con cambios en las condiciones de los peces (Shulman & Love 1999). Existirían cambios estacionales en la composición de lípidos, agua y proteínas en músculos, hígado y vísceras, asociados a procesos de crecimiento gonadal y otros procesos asociados al desove, ya que la acumulación de lípidos depende directamente de la disponibilidad de alimento, y es muy importante en la recuperación en períodos de postdesove (Eliassen & Vahl 1982;Shulman & Love 1999).…”

Evidence of impaired health in yellow perch (Perca flavescens) from a biological mercury hotspot in northeastern north America

“…It is likely, therefore, that the positive relationship between female perch LSI and muscle (THg) resulted from the confounding positive relationship between LSI and a measure of fish size. Liver somatic index is influenced by fish nutritional status [39], and a shift in the diet of larger perch to higher trophic level prey (as suggested for condition below) could result in a concomitant increase in LSI with fish size and muscle (THg).…”