Dužinsko-maseni odnos i udio masnih kiselina u mišićnom tkivu hame (Argyrosomus regius) pri različitoj hranidbi

master's thesis

• Title (english): Lenght-weight relationship and fatty acid profile of muscle tissue of meagre (Argyrosomus regius) fed with different feed mixtures
• Author: Katarina Bencetić
• Mentor: Daniel Matulić (mentor)
• Committee member: Daniel Matulić (predsjednik povjerenstva)
• Committee member: Tomislav Treer (član povjerenstva)
• Committee member: Tea Tomljanović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Fisheries, Beekeeping, Game Management and Special Zoology); Zagreb
• Defense date and country: 2018-07-04, Croatia

Abstract

Cilj istraživanja bio je odrediti dužinsko-maseni odnos i udio masnih kiselina u
mišićnom tkivu hame (Argyrosomus regius) pri različitoj hranidbi. Pokus je proveden u tri
hranidbena tretmana: CF (SP=48,0; SM=16,0) EXF (SP=52,0; SM=21,0) NCF (SP=56,0;
SM=18,0) s dva ponavljanja (3x2) u morskim akvakulturnim kavezima dimenzija 9x5x5 m
(V=225 m³) na lokaciji otoka Bisage (44°01´28.6"N 15°13´11.2"E) tijekom 17 mjeseci.
Najveći postotak lipida (16,81%) u mišićnom tkivu zabilježen je kod EXF hranidbene smjese.
Također, u istoj skupini utvrđen je najviši udio ukupnih ω-3 masnih kiselina (35,46 ± 6,12)
dok je prosječni omjer ω3:ω6 masnih kiselina iznosio 3,86±1,54. Ribe hranjene EXF
smjesom, imale su više vrijednosti završne mase i dužine tijela u odnosu na ribe hranjene CF i
NCF. Jedinke CF hranidbene skupine imaju pozitivan alometrijski rast, (b=3,186) s
vrijednostima kondicijskog faktora 1,27, tj napredovale su više u masu. Jedinke NCF i EXF
hranidbenih skupina imaju negativan alometrijski rast,(NCF b=2.037, CF=1.19; EXF
b=2.953, CF=1.22) što nam ukazuje da su jedinke riba napredovale više u dužinu nego u
masu.
Istraživanje indicira EXF kao hranidbenu smjesu povoljnog kemijskog sastava pri čijoj
konzumaciji riba postiže pogodan masnokiselinski profil te više vrijednosti završne mase i
dužine.

Abstract (english)

The aim of this study was to evaluate the lenght – weight relationship and fatty acid profile of
muscle tissue of meagre (Argyirosomus regius) fed with different feed mixtures. The
experiment was performed in the form of three feeding groups CF (CP=48,0; CF =16,0), EXF
(CP=52,0; CF =21,0), NCF (CP=56,0; CF=18,0) with two repetitions (3x2) in marine
aquaculture cages of 9x5x5 m (V = 225 m³) at the location of the island of Bisage (44°
01'28.6 "N 15° 13'11.2" E) during 17 months. Fish were fed to satiety. The highest percentage
of lipids (16.81%) in muscle tissue was recorded in the EXF feed. Also, in the same group,
the highest average proportion of total ω-3 fatty acids (35.46 ± 6,12) was found. The ω3/ω6
fatty acids ratio was highest in EXF (3,86 ± 1,54). Fish fed with EXF had higher final weight
and total length compared with CF and NCF. CF feeding group had a positive alometric
growth, (b = 3.186) with condition factor (CF) of 1.27. NCF and EXF feeding groups have a
negative alometric growth, b <3 (NCF b=2.037, CF=1.19; EXF b=2.953, CF=1.22), which
indicates that the fish progressed more in length than in mass. The study indicated EXF as a
nutritional mixture of favorable chemical composition and by consumption fish achieves a
suitable fatty acids profile and high nutritive quality.

• Keywords: dužinsko – maseni odnosi; masno – kiselinski profil; hranidba; hranidbene smjese; Argyrosomus regius
• Keywords (english): length - weight relationships; fatty acid profile; nutrition; feed mixture; Argyrosomus regius
• Language: croatian
• URN:NBN: urn:nbn:hr:204:910040
• Study programme: Title: Fisheries and Game Management; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka ribarstva i lovstva (magistar/ magistra inženjer/inženjerka ribarstva i lovstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2018-07-23 09:24:32