EJPAU 2006. Kowalska A. , Zakęś Z. , Demska-Zakęś K. THE IMPACT OF FEEDING ON THE RESULTS OF REARING LARVAL PIKEPERCH, <I>SANDER LUCIOPERCA</I> (L.), WITH REGARD TO THE DEVELOPMENT OF THE DIGESTIVE TRACT

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 2

Topic:

Fisheries

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Kowalska A. , Zakęś Z. , Demska-Zakęś K. 2006. THE IMPACT OF FEEDING ON THE RESULTS OF REARING LARVAL PIKEPERCH, SANDER LUCIOPERCA (L.), WITH REGARD TO THE DEVELOPMENT OF THE DIGESTIVE TRACT, EJPAU 9(2), #5.
Available Online: http://www.ejpau.media.pl/volume9/issue2/abs-5.html

THE IMPACT OF FEEDING ON THE RESULTS OF REARING LARVAL PIKEPERCH, SANDER LUCIOPERCA (L.), WITH REGARD TO THE DEVELOPMENT OF THE DIGESTIVE TRACT

Agata Kowalska¹, Zdzisław Zakęś¹, Krystyna Demska-Zakęś²
¹ Department of Aquaculture, Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland
² Department of Ichthyology, University of Warmia and Mazury, Olsztyn, Poland

ABSTRACT

The aim of this study was to determine the impact of the period mixed feed (formulated feed + Artemia sp.) is applied to the growth, survival, and digestive tract development of larval pikeperch (larva age – 6 days post-hatch (DPH)). The larvae were divided into three experimental groups and fed mixed feed from 6 to 12 DPH (group I), from 6 to 19 DPH (group II), and from 6 to 26 DPH (group III). After feeding with brine shrimp was discontinued (group I and II), the larvae were fed formulated feed exclusively. During rearing, the mean larval body weight increased from 0.7 to 20 mg (group I) and 25 mg (group III; P < 0.05). Larval survival in the tested groups was similar at approximately 60% (P > 0.05). The highest percentages of deformed larvae were noted in groups II and III (16 and 14%, respectively). Feeding was noted to have a significant impact on the development of the pikeperch digestive tract. The folds in the esophagus and posterior intestine of fish fed natural feed for the shortest period were the highest (P < 0.05). They also had the most intestinal pinocytotic vesicles and mucous cells. The smallest esophagus goblet cells and gastric glands were noted in group I (P < 0.05).

Key words: digestive tract histology, feeding, larvae, pikeperch (Sander lucioperca).

Agata Kowalska
Department of Aquaculture,
Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland

Zdzisław Zakęś
Department of Aquaculture,
Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland

Krystyna Demska-Zakęś
Department of Ichthyology,
University of Warmia and Mazury, Olsztyn, Poland
Oczapowskiego 10, 10-719 Olsztyn, Poland

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.