Evolution saisonnière de la composition biochimique de deux Téléostéens (<i>Perca fluviatilis</i>, L.,<i>Rutilus rutilus</i>, L.) et du plancton dans la retenue de Pareloup (Aveyron)

Ferroni, J. M.; Francisco, P.; Parent, Jean-Paul; Tourenq, J. N.

doi:10.1051/limn/1996006

Cited by 1 publication

(1 citation statement)

References 43 publications

(28 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Seasonal variation in the proximate composition of ®sh and plankton has been described, e.g. by Ferroni et al 1996, and it can be expected that these changes will cause changes in isotopic composition not related to changes in the diet. Special attention must be paid to isotopic ratios in the Fig.…”

Section: Discussionmentioning

confidence: 99%

Metabolic fractionation of stable carbon isotopes: implications of different proximate compositions for studies of the aquatic food webs using δ 13 C data

1998

View full text Add to dashboard Cite

In two laboratory experiments using tilapia (Oreochromis niloticus) and common carp (Cyprinus carpio), we investigated the effect of lipid content in the fish carcass on the stable carbon isotope ratio (δC). In both experiments, a significant negative correlation was found between lipid content in the carcass dry matter and δC of total dry matter, but there was no influence on the δC of fat-free dry matter or lipids. As the lipid content of fish is known to vary with reproductive stage, season or nutritional state, separate analysis of fractions of the proximate composition of dry matter will lead to more reliable results than analysing the whole body. The differences in δC between diet and fish carcass (trophic shift) were different for the two species, calling for feeding trials under controlled conditions using the species and the feeds in question before applying the stable isotope tracer technique in the analysis of food webs.

show abstract

Section: Discussionmentioning

confidence: 99%