Liver triglyceride synthesis failure in post‐spawning salmon

Phleger, Charles F.

doi:10.1007/bf02531826

Cited by 15 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This decline was not unexpected, however, since it is known that during the initial phases of starvation in fish triglycerides are catabolized while other lipids remain largely unchanged (Love 1980). Also, it has been shown in pink salmon (Oncorhynchus gorbuschu) that, during the nonfeeding spawning migration, the liver's triglyceride synthetic ability is lost and blood triglyceride levels fall (Phleger 1971). Decreased serum or plasma triglycerides have been observed in (Oncorhynchus mykiss (formerly Salmo guirdnerii; Takashima et al 1971), Sulmo alpinus (Dannevig and Norum 1983), and Pleuronecres pluressa (White and Fletcher 1986) after periods of starvation.…”

Section: Discussion Serum Lipidsmentioning

confidence: 99%

Serum Lipoproteins in Striped Bass (Morone saxatilis): Effects of Starvation

MacFarlane¹,

Harvey²,

Bowers³

et al. 1990

Can. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

. 5. Patton. 1990. Serum lipoproteins in striped bass (Morone Withholding food for 4 wk resulted in more extensive alterations within serum lipoprotein classes in striped bass (Morone saxatilis) than were evident in serum total lipids where only a decrease in triglycerides was significant. Total serum lipoprotein concentrations were about 3300 mg/dL in both fed and starved fish; however, high density lipoproteins (HDL) increased and very low density lipoproteins (VLDL) decreased significantly in the starved group. Quantitatively, the greatest changes in VLDL, the primary transporter of triglycerides, were declines in triglycerides and cholesterol esters. Within low density lipoproteins, triglycerides and phospholipids decreased. The HDL composition was affected least by starvation. Phospholipids were the dominant lipid in HDL and increased from 479.1 mg/dL in fed to 670.2 mg/dL in starved fish. The apoproteins of each lipoprotein class changed little qualitatively due to starvation. Our results reflect the importance of maintaining high levels of lipoproteins as a transport system for lipids from storage depots to depleted tissues permitting survival during prolonged periods of starvation that are often encountered by fish during colder months and during spawning migrations. Furthermore, during starvation HDL appears to assume increased significance as a vehicle for the transport of structural lipids to maintain tissue integrity.La privation de nourriture pendant quatre semaines a prcduit des alterations plus importantes dans les classes de lipoproteines seriques chez le Bard'Amerique (Morone saxatilis) qu'il ne paraissait dans les lipides s6riques totaux, ce qui n'avait revel6 de baisse importante que dans la teneur en triglycerides. La concentration en lipoproteines seriques totales etait d'envirion 3300 mg.dL-' chez les sujets nourris ainsi que les sujets affames. Cependant, la teneur en lipoproteines de haute densite (HDL) a augment6 alors que celle des lipoprotbines de tres basse densite (VLDL) a diminue significativement chez les sujets affames. Sur le plan quantitatif, les plus importants changements en VLDL, le principal vecteur des triglycerides, a et6 la diminution en concentration des triglycerides et des esters du cholesterol. Quant aux lipides de basse densit6 (LDL), la teneur en triglycerides et en phospholipides a diminu6. La composition en HDL a le moins varie par suite du traitement. Les phospholipides constituaient la principale forme de HDL et leur concentration est pass& de 479,l mgdL-' chez les sujets nourris a 670,2 mg.dL-' chez les sujets affames. Les apoproteines de chaque classe de lipoproteines ont peu varie qualitativement par suite de I'inanition. Nos resultats montrent I'importance de garder les lipoproteines a un niveau eleve comme moyen de transport des lipides, des reserves aux tissus qui se sont appauvris, ce qui assure la survie durant les p6riodes prolongees de famine que les poissons doivent souvent affronter durant les mois d'hiver et au cours des migrations pour la reproduct...

show abstract

Section: Discussion Serum Lipidsmentioning

confidence: 99%

Serum Lipoproteins in Striped Bass (Morone saxatilis): Effects of Starvation

MacFarlane¹,

Harvey²,

Bowers³

et al. 1990

Can. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

show abstract

Skeletal lipid depletion in spawning salmon

Phleger

Laub

Benson

1989

Lipids

View full text Add to dashboard Cite

Skeletal tissues in Pacific salmon are composed of significant amounts of lipid (which serves as an energy supply), that is then depleted during migration and freshwater spawning. The vertebral centra and neurocrania of ocean prespawning pink salmonOncorhynchus gorbuscha, although composed respectively of 2.9–13% and 0.5–6.3% lipid (each by dry weight), amount only to 0–1.6% and 0–1.4% in river postspawning individuals. The skeletal lipids are 91–98% triacylglycerol with only small amounts of phospholipid and cholesterol. Triacylglycerols of carbon numbers 47, 49 and 51 are selectively depleted during spawning, whereas there are increases in the relative amounts of those of carbon numbers 55, 57, 59 and 61. The patterns of variation of the skeletal lipids of coho salmon,O. kisutch, chum salmon,O. keta, and sockeye salmon,O. nerka are similar to those ofO. gorbuscha.

show abstract

Histological assessment of organs in sexually mature and post-spawning steelhead trout and insights into iteroparity

Penney

Moffitt

2013

Rev Fish Biol Fisheries

View full text Add to dashboard Cite

Liver triglyceride synthesis failure in post‐spawning salmon

Cited by 15 publications

References 14 publications

Serum Lipoproteins in Striped Bass (Morone saxatilis): Effects of Starvation

Serum Lipoproteins in Striped Bass (Morone saxatilis): Effects of Starvation

Skeletal lipid depletion in spawning salmon

Histological assessment of organs in sexually mature and post-spawning steelhead trout and insights into iteroparity

Contact Info

Product

Resources

About