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001-es BibID:	BIBFORM074638
035-os BibID:	(cikkazonosító)2111 (Scopus)85034428703 (WOS)000416793400189
Első szerző:	Gyalog Gergő (közgazdász)
Cím:	Constraining Factors in Hungarian Carp Farming : an Econometric Perspective / Gyalog Gergő, Oláh Judit, Békefi Emese, Lukácsik Mónika, Popp József
Dátum:	2017
ISSN:	2071-1050
Megjegyzések:	Although carp farming had a key role in the Blue Revolution at a global level, European carp aquaculture has stagnated over the past 25 years without achieving any productivity gains. The objective of this study was to identify the factors and mechanisms constraining production and productivity growth in pond-based carp farming in Hungary, as the country is a good representative of the EU pond-based farming sector. By using data from 44 carp farms, different specifications of the Cobb-Douglas production function were parameterized to investigate the determinants of yields and to assess the extent of economies of scale. Descriptive statistics show that large differences exist in productivity between individual farms, meaning that it is hard to implement technical standards and to ensure repeatability in extensive carp farming technology. Econometric analysis demonstrates that economies of scale do not prevail in pond-based farming in Hungary, so a concentration of farms would not stimulate a growth in carp farming. This may explain the stagnation of carp aquaculture, as the only European aquaculture segments which can grow are those that can exploit economies of scale. Further analysis demonstrates that labour is an important factor of production, and a decreasing workforce may constrain the intensification process of production. On the other hand, mechanisation did not prove to be a significant contributing factor to yields, indicating that large investment in equipment has a limited role in carp farming.
Tárgyszavak:	Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Cobb-Douglas production function carp farming Hungarian aquaculture productivity input efficiency diseconomies of scale
Megjelenés:	Sustainability. - 9 : 11 (2017), p. 1-13. -
További szerzők:	Oláh Judit (1973-) (agrárközgazdász, logisztika) Békefi Emese (1976-) (agrármérnök) Lukácsik Mónika (agrár-közgazdász) Popp József (1955-) (közgazdász)
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001-es BibID:	BIBFORM078219
035-os BibID:	(cikkazonosító)177 (WOS)000425082600174 (Scopus)85040457667
Első szerző:	Popp József (közgazdász)
Cím:	Evolution of integrated open aquaculture systems in Hungary : results from a case study / József Popp, László Váradi, Emese Békefi, András Péteri, Gergő Gyalog, Zoltán Lakner, Judit Oláh
Dátum:	2018
ISSN:	2071-1050
Megjegyzések:	This article presents the history of integrated farming in aquaculture through a Hungarian case study. The development of Hungarian integrated aquaculture is aligned with global trends. In the previous millennium, the utilization of the nutrients introduced into the system was the main aspect of the integration. In Hungary, technologies that integrated fish production with growing crops and animal husbandry appeared, including for example: large-scale fish-cum-rice production; fish-cum-duck production; and integrated pig-fish farming which were introduced in the second half of the 20th century. Today, the emphasis is on integrating the use of the kind of feed where the main goal is to minimize nutrient loads in the surrounding natural ecosystems and to maximize the utilization of the unit's water resources. The various modern integrated freshwater aquaculture systems, such as intensive fish production combined with wetland, recirculation aquaculture system and multi-functional aquaculture, have proved their viability. However, the future opportunities for these systems have not always been properly recognized and acknowledged when the future of European aquaculture is discussed.
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Sustainability. - 10 : 1 (2018), p. 1-19. -
További szerzők:	Váradi László (agrár) Békefi Emese (1976-) (agrármérnök) Péteri András Gyalog Gergő (közgazdász) Lakner Zoltán (agrárökonómia) Oláh Judit (1973-) (agrárközgazdász, logisztika)
Pályázati támogatás:	FOP3.6.3-VEKOP-16-2017-00007 EFOP
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