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001-es BibID:BIBFORM108023
035-os BibID:(WOS)000618621400001 (Scopus)85100909448
Első szerző:Mozsár Attila (környezetkutató, ökológus)
Cím:Sexual trait may simultaneously indicate sperm production and nutritional fitness in uniparental nest-guarding fish : a case study on Amur sleeper / A. Mozsár, A. Specziár, Zs. Pirger, I. Czeglédi, S. Kati, S. A. Nagy, K. Nyeste, D. Somogyi, L. Antal
Dátum:2021
ISSN:0952-8369
Megjegyzések:The reproductive success of uniparental males depends much on their nutritional stage (i.e. body condition). Therefore, secondary sexual traits should convey information not only on fecundity but also on nutritional stage. To test this hypothesis, we evaluate relationships between head crest height (HCH), as a secondary sexual trait, relative testes mass (an indicator of sperm production), body condition (an indicator of nutritional status) and body mass of males of uniparental Amur sleeper Perccottus glenii in two contrasting habitats. Furthermore, we examined whether head crest is only a pure investment to advertise male fitness - either to females, rival males or other fish approaching the nest - or it comprises some regainable energy as well. We found that HCH is closely related to relative testes mass, and body condition especially at the beginning of the reproductive period. The head crest consisted of a swollen connective tissue in the supraorbital region of the head, and an oedematous epaxial muscle in the nuchal region. Furthermore, the head crest also comprised of adipose tissue, although not as much as assumed. Therefore, we argue that HCH represents a reliable signal of multiple aspects of male quality; it indicates readiness to spawn and could potentially effectively facilitate female choice towards large males with high fecundity and great nutritional stage, which is essential to good guarding performance. Moreover, the head crest itself also could contribute to nest-guarding performance by virtually enlarging body size and by representing a minor fat reserve.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal Of Zoology. - 314 : 3 (2021), p. 227-233. -
További szerzők:Specziár András Pirger Zsolt Czeglédi István (1988-) (hidrobiológus) Kati Sára (1990-) (hidrobiológus) Nagy Sándor Alex (1956-) (hidrobiológus) Nyeste Krisztián József (1993-) (hidrobiológus) Somogyi Dóra (1996-) (hidrobiológus) Antal László (1984-) (hidrobiológus, biológus-ökológus)
Pályázati támogatás:TKP2020-IKA-04
egyéb
2020-4.1.1-TKP2020
egyéb
ÚNKP-20-3
egyéb
2017-1.2.1-NKP-2017-0002
egyéb
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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
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3.

001-es BibID:BIBFORM069272
Első szerző:Nyeste Krisztián József (hidrobiológus)
Cím:Growth features of the Amur sleeper Perccottus glenii (Actinopterygii: Odontobutidae), in the invaded Carpathian basin, Hungary / Krisztián Nyeste, Sára Kati, Sándor A. Nagy, László Antal
Dátum:2017
ISSN:0137-1592 1734-1515
Megjegyzések:Background. The Amur sleeper, Perccottus glenii Dybowski, 1877, is the most invasive alien fish species inthe native aquatic communities in central Europe. Although the accelerated invasion of P. glenii has been welldocumented, there is little information on the ecological and growth parameters of non-native populations in thisregion. The aim of this study was to describe the growth features of the population of P. glenii in a shallow oxbowlake in the Carpathian Basin.Materials and methods. Our study sample consisted of 1239 individuals (628 ? + 611 ?) collected from anoxbow lake near the Tisza River in the same month for three years (2013?2015). The length, weight, age structure,sex-dependent growth rate, and the condition factor of the collected specimens were determined.Results. The sex ratio was 0.49 (? ? (? + ?)). The standard length and weight of the collected P. glenii specimensranged from 20.7 to 127.7 mm and from 0.3 to 75.8 g, respectively. The length?weight relations (SL?W) wereallometrically negative for the males (W = 3.2 ? 10?5SL2.960), females (W = 3.8 ? 10?5SL2.921), and both sexes (W =3.5 ? 10?5SL2.940), without significant differences between males and females. According to the length-frequencyanalysis, five age groups were differentiated. The von Bertalanffy growth models were L? = 138.87 mm, k = 0.21,t0 = ?0.54 (?), L? = 174.21 mm, k = 0.17, t0 = ?0.33 (?), L? = 154.01 mm, k = 0.19, t0 = ?0.45 (? + ?). The growthperformance parameters were ?· = 3.61 (?), ?· = 3.71 (?), ?· = 3.65 (? + ?), respectively.Conclusion. Due to unequal investment in reproduction, there was a significant difference in the growth ratebetween males and females. The literature data showed that invasive gobies and odontobutids (e.g., P. glenii)exhibit more opportunistic reproduction strategy in newly colonized areas, which may contribute to the invasionsuccess. This strategy (e.g., earlier maturation, longer spawning period, etc.) results in slower growth rate due toenergetic trade-off between reproduction and somatic growth. The observed growth rate of invasive Amur sleeperpopulation (especially in the older age groups) was slower than that of native and more established naturalizedpopulations in Eurasia.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
age
growth
condition factor
rotan
invasion
Megjelenés:Acta Ichthyologica et Piscatoria. - 47 : 1 (2017), p. 33-40. -
További szerzők:Kati Sára (1990-) (hidrobiológus) Nagy Sándor Alex (1956-) (hidrobiológus) Antal László (1984-) (hidrobiológus, biológus-ökológus)
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