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001-es BibID:	BIBFORM115655
035-os BibID:	(cikkazonosító)17691 (WoS)001086802300034 (Scopus)85174462262
Első szerző:	Fazekas Lilla Dorottya biológus
Cím:	Acute effects of angler's groundbaits : nutrient flux to water column / Dorottya Lilla Fazekas, László Antal, Béla Halasi-Kovács, Maciej Kwiatkowski, Flórián Tóth, András Specziár, Attila Mozsár
Dátum:	2023
ISSN:	2045-2322
Megjegyzések:	Although ground-baiting related nutrient loading has been widely studied, we do not know what proportion of these nutrients release into the water column, affecting primary production directly. We conducted short-term (24-h, 5-day) experiments at wide temperature range, in presence and absence of fish using fish meal-based (FM-GB) and plant-based groundbait (PB-GB), to assess the nitrogen (N) and phosphorus (P) fluxes from GB into the water column. Nitrogen release from unconsumed FM-GB was negligible in the first 3 days, then increased abruptly, releasing 32% of its total N content by the fifth day. In contrast, PB-GB acted as temporary sink for inorganic N forms. Considerable (18?21%) inorganic P release was observed in both GB types in the first twelve hours. Consumed GBs induced considerable inorganic N release and its rate increased with temperature. Particulate forms predominated the released N in PB-GB, suggesting impaired digestion. Phosphorus?dominated by particulate forms?release was similar or lower than in unconsumed GB. Based on our results, excessive use of GB?when high amount of it remains unconsumed?can enhance eutrophication in P-limited ecosystems. Although less digestible GBs may have less abrupt effect on the primary production, undigested nutrients remain unavailable for removal through fish harvest.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Scientific Reports. - 13 : 1 (2023), p. 1-12. -
További szerzők:	Antal László (1984-) (hidrobiológus, biológus-ökológus) Halasi-Kovács Béla (1970-) (ökológus) Kwiatkowski, Maciej Tóth Flórián Specziár András Mozsár Attila (1987-) (környezetkutató, ökológus)
Pályázati támogatás:	RRF2.3.1 21-2022-00008 Egyéb NP2022- II3/2022 Egyéb TKP2021-NKTA-32 Egyéb
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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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