Utjecaj lokacije na kondicijsko stanje riba

master's thesis

• Title (english): The impact of location on the condition factor of fishes
• Author: Anita Gajdić
• Mentor: Tomislav Treer (mentor)
• Committee member: Tomislav Treer (predsjednik povjerenstva)
• Committee member: Ivica Aničić (član povjerenstva)
• Committee member: Daniel Matulić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Fisheries, Beekeeping, Game Management and Special Zoology); Zagreb
• Defense date and country: 2016-07-07, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy; Fishing

Abstract

U ovom radu prikazan je dio rezultata ribarskog istraživanja rijeke Save u svom toku kroz Hrvatsku koje je obavljeno u razdoblju od 2003. do 2012. godine. Napravljena je usporedba kondicijskog stanja 20 vrsta riba na 8 različitih lokacija rijeke Save. Faktor kondicije mjeren je Fultonovim koeficijentom kondicije koji nam dobro pokazuje opće stanje riba, kao i promjene koje se događaju zavisno od lokacije i fizioloških ciklusa u životu riba. Na osnovi izmjerenih morfometrijskih parametara izračunat je prosječan faktor kondicije (CF) za svaku istraživanu vrstu, te su oni uspoređeni međusobno i s prosječnim faktorom kondicije rijeke Save. Raspon faktora kondicije za sve vrste riba kreće se od 0,43 – 2,06. CF viši od 1 na svim promatranim lokacijama zabilježen je kod grgeča (max. 1,22), babuške (max. 1,86), balavca (1,46) te krupatice (2,06) i sunčanice (1,89) kod kojih je izmjere najviši CF. Najlošiji CF izmjeren je kod vijuna i velikog vijuna i to na svim promatranim lokacijama (raspon od 0,43 – 0,62 na ukupno 6 lokacija). Utvrđeni su i prosječni postoci faktora kondicije riba s 8 lokacija rijeke Save, s najmanje četiri vrste, s više od deset primjeraka te su komparirani s prosjekom za rijeku Savu i RH. Raspon prosječnog postotka faktora kondicije na promatranim lokacijama rijeke Save, za sve vrste riba, kreće se od 89,24% na lokaciji Gornji Varoš gdje je najmanji, do 105,24% na lokaciji Puska gdje je najveći. Faktori kondicije riba rijeke Save s prosjekom od 98,49% u većini su nešto viši od onih za kopnene vode cijele Republike Hrvatske s prosjekom od 94,46%. Potrebno je provesti dodatna istraživanja s većim brojem primjeraka pojedinih vrsta kako bi se ovi rezultati potvrdili.

Abstract (english)

This paper presents a part of the research results in a section of river Sava that flows through Croatia. The research is conducted in the period from 2003 to 2012. A comparison of condition factors of 20 fish species from 8 different locations of the river Sava has been done. Condition factor was measured by Fulton’s condition coefficient which shows a general state of fishes, as well as the changes which occur depending on the location and physiological cycles in the life of fishes. The average condition factor (CF) was calculated for each studied species on the basis of the measured morphometric parameters. Those average condition factors were compared mutually and with an average condition factor of the river Sava. Condition factors for all fish species range from 0,43 to 2,06. CF higher than 1, at all observed locations, has been recorded for Percidae (max. 1,22), Prussian carp (max. 1,86), Ruffe (1,46) as well as Silver bream (2,06) and Pumpkinseed (1,89) which have the highest CF. The lowest CF was recorder for Loach and Balcan loach at all observed locations (ranging from 0,43 to 0,62 at altogether 6 locations). Average percentages of condition factors of fishes from 8 locations on the river Sava were determined, taking into consideration at least four species and more than ten specimens, which were compared with the average factors for the river Sava and the Republic of Croatia. Average percentages of condition factor in the observed locations of the river Sava, for all fish species, range from the lowest 89.24% at Gornji Varoš to the highest 105.24% at Puska. Condition factors of fishes from river Sava with an average of 98.49% are generally higher than those for inland waters throughout the Croatian with an average of 94.46%. It is necessary to conduct a further research with a larger number of specimens of each species in order to confirm these results.

• Keywords: kondicijski faktor; rijeka Sava; lokacija
• Keywords (english): condition factors; river Sava; location
• Language: croatian
• URN:NBN: urn:nbn:hr:204:799625
• 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: 2016-07-29 09:25:56