Biomass Increase in Plankton Populations Induced by Organic Fertilizers Applied during the Reproduction of Common Carp

Levente Vass, Ioan Bud

Abstract


Artificial fertilization of nursery ponds used for nursing postlarvae to fry is a common procedure used in hatcheries to enchance productivity. A 2 ha nursery pond at the Martinesti hatchery was fertilized with 500 kg fermented manure to stimulate phytoplankton, and consequently zooplankton production. A sharp rise in nutrient levels was imminent. Nitrate and phosphate levels has rised tenfold from 0.5 to 2 and 5 mg l-1, respectively from 0.05 to 0.5 mg l-1. Altough nutrient levels kept rising, phytoplankton biomass remained steady, then fell from 0.6 to 0.1 g m-3, while zooplankton biomass has increased from 5 to 14 and 64 g m-3 during the first 4 weeks of postlarval developement.

Keywords


artificial fertilization; nutrients; phytoplankton; primary productivity; zooplankton

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Scientific Papers Animal Science and Biotechnologies publish open access articles under the terms of the Creative Commons Attribution 4.0 Licence (read full legal code).


LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Bioengineering Faculty of Animal Resources
300645, Timişoara, Calea Aradului 119, Romania

E-mail: spasb [at] animalsci-tm.ro
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