EJPAU 2006. Pelczarski W. UTILISATION OF TREATED SEWAGE GROWN ZOOPLANKTON IN WHITEFISH <I>COREGONUS LAVARETUS</I> (L.) FRY REARING

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2006
Volume 9
Issue 1

Topic:

Fisheries

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Pelczarski W. 2006. UTILISATION OF TREATED SEWAGE GROWN ZOOPLANKTON IN WHITEFISH COREGONUS LAVARETUS (L.) FRY REARING, EJPAU 9(1), #36.
Available Online: http://www.ejpau.media.pl/volume9/issue1/abs-36.html

UTILISATION OF TREATED SEWAGE GROWN ZOOPLANKTON IN WHITEFISH COREGONUS LAVARETUS (L.) FRY REARING

Wojciech Pelczarski
Sea Fisheries Institute, Gdynia , Poland

ABSTRACT

The reintroduction of whitefish to Puck Bay generates a great demand for its autumn fry. This results in attempts to find new solutions that would enhance local stocking potential. One of such solutions is to use the zooplankton grown in treated wastewater as the food for whitefish fry. This report presents the variability of zooplankton species composition and biomass growing in the effluent of the sewage treatment plant located in Swarzewo, Poland. Filtered zooplankton was used to feed whitefish fry reared in a seawater-filled pond during May to September, 2003. Food analysis of the fry has demonstrated that the zooplankton was highly preferred as food, both in terms of quality and quantity. Daphnia longispina was the dominant food item over the entire period; however, in September Neomysis integer played a similar role. The weight of the supplied zooplankton outweighed the daily requirement of the fry many fold during May-June, providing enough food for the current stocking density over the remaining months. At the end of September, the juveniles with a mean length of 128.4 mm and a body weight of 20.6 g were released to Puck Bay.

Key words: feeding , treated sewage, whitefish, zooplankton.

Wojciech Pelczarski
Sea Fisheries Institute, Gdynia , Poland
Kołłątaja 1, 81-332 Gdynia, Poland
email: wpelczar@mir.gdynia.pl

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.