Találati lista | Tudóstér

001-es BibID:	BIBFORM058670
Első szerző:	Boros Gergely
Cím:	Between-lake variation in the elemental composition of roach (Rutilus rutilus L.) / Gergely Boros, Jussi Jyväsjärvi, Péter Takács, Attila Mozsár, István Tátrai, Martin Søndergaard, Roger I. Jones
Dátum:	2012
ISSN:	1386-2588
Megjegyzések:	Stoichiometry theory states that the elementalcomposition of individual organisms is a taxondependenttrait, and that organisms maintain relativelyconstant body nutrient composition, independent offood nutrient content or ingestion rate. Some recentstudies have pointed out that assuming a strict homeostasisin fish is an over-simplification, so that nutrientratios in fish bodiesmay not be as constant as previouslythought. In this study, our aims were (a) to assess theoverall nutrient composition of roach, (b) to reveal anysignificant differences in elemental composition ofroach between populations from different lakes and(c) to relate these potential differences to environmentalparameters and fish condition. The mean elementalcomposition of roach (whole fish) was 45.0 ? 5.3 %carbon (C), 10.2 ? 0.8 % nitrogen (N), and 2.4 ? 0.5% phosphorus (P), while their molar C/N/P ratio wasapproximately 50:10:1. The elemental composition ofroach was not as constant as homeostatic stoichiometrymodels would predict. Significant differences werefound in the carbon, nitrogen, and phosphorus contentsof fish sampled from different lakes. Productivity oflakes (expressed as chlorophyll-a) was positively correlatedwith %C, C/N, C/P, and N/P ratios, andnegatively correlated with %N and %P. In turn, meanlake temperature was negatively correlated with %Cand C/N ratio, but not with other nutrients or nutrientratios. Condition factor was negatively related to the%C of fish, but it did not correlate significantly with%N, %P, or nutrient ratios. Our results on intraspecificnutrient variation illustrate the potential differencesbetween populations and emphasize the importance oflake-specific approaches.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban Roach Stoichiometry Carbon Nitrogen Phosphorus In
Megjelenés:	Aquatic Ecology. - 46 : 4 (2012), p 385-394. -
További szerzők:	Jyväsjärvi, Jussi Takács Péter Mozsár Attila (1987-) (környezetkutató, ökológus) Tátrai István Søndergaard, Martin Jones, Roger I.
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: