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001-es BibID:	BIBFORM071673
Első szerző:	Nyeste Krisztián József (hidrobiológus)
Cím:	Az amurgéb (Perccottus glenii) egy hazai populációjának növekedési sajátosságai / Nyeste Krisztián, Kati Sára, Nagy Sándor Alex, Antal László
Dátum:	2017
ISSN:	1789-1329
Megjegyzések:	Although the Amur sleeper (Perccottus glenii Dybowski, 1877) is the most invasive alien freshwater fish species in Eurasia, the ecology of this species is underrepresented in the literature. In this study we investigated the growth features of population of Amur sleeper in Rakamazi?Nagy-morotva. Our study sample consisted of 1239 individuals (628 ? + 611 ?) collected from 2013 to 2015. The length, weight, age structure, sex-dependent growth rate, and the condition factor of the collected specimens were determined. According to the length frequency analysis and the annuli of scales there were seven age groups, but due to small number of individuals of 5+ and 6+ age groups, these data were removed from the statistical analysis. The length?weight relations (SL?W) were allometrically negative for the males (W = 3.2 ? 10^?5 SL^2.960), females (W = 3.8 ? 10^?5 SL^2.921), and both sexes (W = 3.5 ? 10^?5 SL^2.940). The von Bertalanffy growth equations were Lt = 138,87(1-e-0,21(t+0,54)) for males, Lt = 174,21(1-e-0,17(t+0,33)) for females, and, Lt = 154,01(1-e-0,19(t+0,45)) for both sexes. The observed growth rate of sexes were significantly different, due to unequal investment to reproduction, because there are an energetic trade-off between the somatic growth and reproduction. The growth rate of Amur sleeper population in Rakamazi?Nagy-morotva was slower than the literature data, due its opportunistic life-history traits (e.g., earlier maturation, longer spawning period, etc.) showed in newly colonized habitats.
Tárgyszavak:	Természettudományok Környezettudományok magyar nyelvű folyóiratközlemény hazai lapban kor nem kondíció Bertalanffy-egyenlet
Megjelenés:	Pisces Hungarici 11 (2017), p. 67-76. -
További szerzők:	Kati Sára (1990-) (hidrobiológus) Nagy Sándor Alex (1956-) (hidrobiológus) Antal László (1984-) (hidrobiológus, biológus-ökológus)
Pályázati támogatás:	ÚNKP?17?3 Egyéb
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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