RESEARCH METHODOLOGY ON NATURAL NUTRITION OF FRESH-WATER FISH

• Main Authors: Marina Piria, Tomislav Treer, Roman Safner, Ivica Aničić, Tea Odak
• Format: Article
• Language: English
• Published: Sciendo 2001-03-01
• Series: Croatian Journal of Fisheries
• Subjects: freshwater fish; natural nutrition; qualitative analysis; quantitative analysis
• Online Access: http://ribarstvo.agr.hr/articles/75538_METODIKA_ISTRA_IVANJA_PRIRODNE_PREHRANE_SLATKOVODNIH_RIBA__hr.pdf

This paper offers the entire review on the research methodology in natural nutrition of fresh-water fish. The data on fresh-water fish nutrition, particularly on fish of lower economic value, is inadequate. Reviewing the literature on assesment of nutritional parameters, the authors obviously use differenet approaches and methods. This paper is about most frequently used parameteres in qualitative and quantitative analysis. The qualitative analysis of food structure is the overall list of determinable taxa (mostlyu species and genera). The quantitative analysis comprises the assessment of particular nutritional categories by nutritional indices and coefficients. Bio-identification and numeric data processing can have numerous drawbacsk such as effect of regurgitation or the degree of digestion of the prey. The analyses of those effects proceed through statistical data processing in order to include spatial distribution of certain prey categories as well. The importance of this data is to determine the nutritional needs of potential species for culture as well as to come up with new insights on a particular aquatic ecosystem.