33 research outputs found
UVODNIK 2016: PROMJENAMA PREMA BUDUÄNOSTI
By changing its editorial system, the Croatian Journal of Fisheries continues to move towards a more rigorous review which is slowly but surely strengthening its quality and impact. New editors-in-chief have been elected and a co-operation with De Gruyter Open publishers has been established. The official abbreviation of the Journal ā CROAT J FISH ā was released and it indicated an important change in the manuscript submission process. Also, this Editorial provides information on the articles published in 2015, as well as a list of reviewers who participated in the review process.Promjenom uredniÄkog sustava i njegovog naÄina rada, Äasopis se nastavlja kretati u pravcu rigoroznijih recenzija Å”to, polagano ali sigurno, jaÄa njegovu kvalitetu i utjecaj. Izabrani su novi glavni urednici Äasopisa i uspostavljena je suradnja s izdavaÄkom kuÄom De Gruyter Open. Objavljena je službena kratica Äasopisa ā Croat J Fish - te je naznaÄena važna promjena kod prijave radova u CJF-u. TakoÄer, uvodnik daje podatke objavljenih Älanaka u 2015. godini prema tematskim cjelinama, kao i popis recenzenata koji su sudjelovali u recenzijskom postupku
A REVIEW OF AQUACULTURE RESEARCH IN CROATIA PUBLISHED IN THE CROATIAN JOURNAL OF FISHERIES SINCE 1938
U radu je obuhvaÄen 151 Älanak publiciran u Äasopisu Croatian Journal of Fisheries od 1938. do 2016. godine koji se bavi podruÄjem akvakulture u Hrvatskoj. Objavljeni radovi svrstani su u sedam grupa na temelju glavnih predmeta istraživanja. Teme ukljuÄuju: statistiku u akvakulturi Hrvatske; bolesti i zdravstvenu zaÅ”titu, uzgojne tehnologije, upravljanje, ekonomiju i zaÅ”titu okoliÅ”a, riblju prehranu i kvalitetu proizvoda, poboljÅ”anje akvakulture i biologiju i ekologiju vrsta. Ovaj rad sažeto informira o istraživanjima u akvakulturi u Hrvatskoj od 1938. godine. Zbog velikog doprinosa istraživanju, razvoju i kvaliteti upravljanja hrvatskom akvakulturom potrebno je i dalje promicati i razvijati Äasopis Croatian Journal of Fisheries.151 articles published in the Croatian Journal of Fisheries from 1938 until 2016, covering aquaculture research in Croatia, have been included in this study. Published articles have been classified into seven groups based on their main topics. Topics include: aquaculture statistics in Croatia; disease and health care; farming technology; management, economics and environmental protection; fish nutrition and product quality; improving aquaculture; and species biology and ecology. The study concisely informs about aquaculture research in Croatia since 1938. Due to large contribution to the research, development and quality management of Croatian aquaculture, further promotion and development of Croatian Journal of Fisheries is required
GENETIC MARKERS ASSISTED SELECTION IN AQUACULTURE
Akvakultura je industrija u razvoju s ukupnom globalnom vrijednoÅ”Äu od 56 milijardi dolara. Proizvodnja se temelji na oko 210 vrsta, od kojih Å”arani i kamenice imaju najveÄu proizvodnju. Neke od vrsta u akvakulturi nastoje se proizvodno unaprijediti ciljanim selekcijskim radom, koji se primarno temelji na metodama populacijske genetike. Glavni cilj uzgojnih programa u akvakulturi jest poveÄanje profitabilnosti i održivosti, uz oÄuvanje genetske varijabilnosti uzgajanih vrsta. Aktualnim uzgojnoāselekcijskim programima nastoje se unaprijediti salmonidi, Å”kampi i tilapije, uz napomenu da su pozitivni uÄinci kod salmonida najizraženiji. Tijekom zadnjih desetljeÄa razvoj molekularne genetike omoguÄio je pojaÄavanje selekcijskoga pritiska putem uporabe genetskih markera koji imaju izravne ili posredne uÄinke na proizvodne odlike. Cilj je ovog rada prikazati nova dostignuÄa, moguÄnosti, ali i probleme pri integraciji markerima potpomognute selekcije u akvakulturi.Aquaculture is an increasing industry, with a total value of 56 billion US$. Production is based on about 210 species of which the carps and oysters have the largest worldāwide production. Aquaculture industry strives to improve production of some species with selection targeted work, which is primarily based on methods of population genetics. The main goal of breeding programs in aquaculture is to increase the profitability and sustainability, while maintaining genetic variability in the cultured stock. Current breeding selection programs strive to improve salmonids, shrimps and tilapia with the proviso that the positive effects at salmonids are most stated. During the last decade development of molecular genetics provides the ability of increasing selection pressure through the use of genetic markers that have direct or indirect effects on the production value. The aim of this work is giving the display of new achievements, capabilities, but also having problems in the integration of marker assisted selection in aquaculture
GENETIC MARKERS ASSISTED SELECTION IN AQUACULTURE
Akvakultura je industrija u razvoju s ukupnom globalnom vrijednoÅ”Äu od 56 milijardi dolara. Proizvodnja se temelji na oko 210 vrsta, od kojih Å”arani i kamenice imaju najveÄu proizvodnju. Neke od vrsta u akvakulturi nastoje se proizvodno unaprijediti ciljanim selekcijskim radom, koji se primarno temelji na metodama populacijske genetike. Glavni cilj uzgojnih programa u akvakulturi jest poveÄanje profitabilnosti i održivosti, uz oÄuvanje genetske varijabilnosti uzgajanih vrsta. Aktualnim uzgojnoāselekcijskim programima nastoje se unaprijediti salmonidi, Å”kampi i tilapije, uz napomenu da su pozitivni uÄinci kod salmonida najizraženiji. Tijekom zadnjih desetljeÄa razvoj molekularne genetike omoguÄio je pojaÄavanje selekcijskoga pritiska putem uporabe genetskih markera koji imaju izravne ili posredne uÄinke na proizvodne odlike. Cilj je ovog rada prikazati nova dostignuÄa, moguÄnosti, ali i probleme pri integraciji markerima potpomognute selekcije u akvakulturi.Aquaculture is an increasing industry, with a total value of 56 billion US$. Production is based on about 210 species of which the carps and oysters have the largest worldāwide production. Aquaculture industry strives to improve production of some species with selection targeted work, which is primarily based on methods of population genetics. The main goal of breeding programs in aquaculture is to increase the profitability and sustainability, while maintaining genetic variability in the cultured stock. Current breeding selection programs strive to improve salmonids, shrimps and tilapia with the proviso that the positive effects at salmonids are most stated. During the last decade development of molecular genetics provides the ability of increasing selection pressure through the use of genetic markers that have direct or indirect effects on the production value. The aim of this work is giving the display of new achievements, capabilities, but also having problems in the integration of marker assisted selection in aquaculture
REPLACEMENT OF FISH MEAL, AS THE DOMINANT SOURCE OF PROTEIN IN AQUACULTURE, WITH ALTERNATIVE NUTRITIONAL COMPONENTS
Redukcija i moguÄa eliminacija ribljeg braÅ”na i ribljeg ulja iz hranidbe akvakulturnih vrsta jedan je od prioriteta u akvakulturi, te podruÄje od velikog interesa i istraživanja. Zbog rastuÄe potrebe za ribom, u pogledu ljudske prehrane te visokog udjela ribljeg braÅ”na u hranidbi akvakulturnih vrsta, globalni trend pretjeranog izlova ribe je postao ozbiljan problem. Kako uzgoj riba u svijetu neprestano raste, nužno je pronaÄi dobar i ekonomiÄan alternativni izvor proteina u hranidbi akvakulturnih vrsta. Riblje braÅ”no je joÅ” uvijek esencijalna komponenta u hranidbi karnivornih riba pa je u buduÄnosti upitna njegova dovoljna koliÄina za potrebe uzgoja. Zamjena ribljeg braÅ”na dovesti Äe do komercijalizacije alternativnih komponenti hrane, Å”to Äe za posljedicu izazvati manju eksploatiranost morskih resursa od strane proizvoÄaÄa i uzgajivaÄa riba Å”irom svijeta. U radu se daje pregled znanstvenih istraživanja alternativnih hranidbenih komponenti koje se koriste kao zamjene ribljeg braÅ”na u hranidbi raznih vrsta riba i ostalih akvakulturnih organizama.Reduction and possible elimination of fish meal and fish oil from the nutrition of aqua cultural fish species is one of the priorities in nowadays research. Due to the growing needs for fish for human consumption and the cost of fishmeal respectively, the global trend of excessive fishing has up to now become a serious problem. Also, as global fish farming continues to increase, the need for good and cost-effective protein sources is increasingly important. Fish meal is still an essential ingredient in diets for carnivorous fish and fish meal availability in sufficient quantities for the future farming is questioned. Replacement of fishmeal in fish feed will lead to the commercialization of the alternatives, marine fish resources will be less exploited by the manufacturers and seafood farmers worldwide. The paper provides a review of scientific research on alternative dietary components used as a substitute in fish meal for various fish species and other aquaculture organisms
REPLACEMENT OF FISH MEAL, AS THE DOMINANT SOURCE OF PROTEIN IN AQUACULTURE, WITH ALTERNATIVE NUTRITIONAL COMPONENTS
Redukcija i moguÄa eliminacija ribljeg braÅ”na i ribljeg ulja iz hranidbe akvakulturnih vrsta jedan je od prioriteta u akvakulturi, te podruÄje od velikog interesa i istraživanja. Zbog rastuÄe potrebe za ribom, u pogledu ljudske prehrane te visokog udjela ribljeg braÅ”na u hranidbi akvakulturnih vrsta, globalni trend pretjeranog izlova ribe je postao ozbiljan problem. Kako uzgoj riba u svijetu neprestano raste, nužno je pronaÄi dobar i ekonomiÄan alternativni izvor proteina u hranidbi akvakulturnih vrsta. Riblje braÅ”no je joÅ” uvijek esencijalna komponenta u hranidbi karnivornih riba pa je u buduÄnosti upitna njegova dovoljna koliÄina za potrebe uzgoja. Zamjena ribljeg braÅ”na dovesti Äe do komercijalizacije alternativnih komponenti hrane, Å”to Äe za posljedicu izazvati manju eksploatiranost morskih resursa od strane proizvoÄaÄa i uzgajivaÄa riba Å”irom svijeta. U radu se daje pregled znanstvenih istraživanja alternativnih hranidbenih komponenti koje se koriste kao zamjene ribljeg braÅ”na u hranidbi raznih vrsta riba i ostalih akvakulturnih organizama.Reduction and possible elimination of fish meal and fish oil from the nutrition of aqua cultural fish species is one of the priorities in nowadays research. Due to the growing needs for fish for human consumption and the cost of fishmeal respectively, the global trend of excessive fishing has up to now become a serious problem. Also, as global fish farming continues to increase, the need for good and cost-effective protein sources is increasingly important. Fish meal is still an essential ingredient in diets for carnivorous fish and fish meal availability in sufficient quantities for the future farming is questioned. Replacement of fishmeal in fish feed will lead to the commercialization of the alternatives, marine fish resources will be less exploited by the manufacturers and seafood farmers worldwide. The paper provides a review of scientific research on alternative dietary components used as a substitute in fish meal for various fish species and other aquaculture organisms
WILD-CAUGHT VERSUS FARMED FISH ā CONSUMER PERCEPTION
Postoji ograniÄeno znanje odrednica potroÅ”aÄkih sklonosti
prema ulovljenim (divljim) ribama iz otvorenih voda u
odnosu na uzgojene ribe iz ribogojiliŔta. Ovaj rad ima za
cilj istražiti utjecaj sociodemografske strukture, navika i
uÄestalosti potroÅ”nje svježe ribe (kao Å”to je ukljuÄenost u
kuhanje) na sklonosti potroÅ”aÄa prema ulovljenim u odnosu
na uzgojene ribe. Istraživanje je izvrŔeno na uzorku od 1151
hrvatskog potroÅ”aÄa ribe. Rezultati su pokazali da žene,
stariji potroÅ”aÄi, potroÅ”aÄi s viÅ”im prihodima i oni koji žive u
obalnom dijelu Hrvatske imaju veÄu preferenciju prema ribi
otvorenih voda i mogu prepoznati razlike u okusu ulovljene i
uzgojene ribe. PotroÅ”aÄi s veÄim navikama potroÅ”nje svježe
ribe, koji Äesto jedu ribu i viÅ”e su ukljuÄeni u kuhanje, viÅ”e vole
ulovljene ribe otvorenih voda. Ovi rezultati pružaju vrijedne
informacije za sektor akvakulture, posebno za planiranje
marketinŔke strategije promicanja uzgoja ribe.We have limited knowledge of determinants of consumer preferences for
wild-caught versus farmed-raised fish, so this work aims to investigate
the impact of sociodemographics, habits and frequency of fresh fish
consumption, such as involvement in cooking, on the preferences for wild
versus farmed fish. A survey was done on a sample of 1151 fish consumers
in Croatia. Results showed that female, older consumers, consumers
with higher income and those living in coastal parts of Croatia give higher
preferences for wild fish and they detect differences between the taste of
wild and farmed fish. Consumers with higher levels of habits of fresh fish
consumption, who eat fresh fish often and are more involved in cooking,
prefer wild-caught fish. These findings provide valuable information for
the aquaculture sector, especially for planning marketing strategies for the
promotion of farmed fish
STRUKTURA ZOOPLANKTONA U MEÄUSOBNO POVEZANIM PLITKIM JEZERIMA
The research of zooplankton diversity, abundance and trophic structure was conducted during the summer period in pelagial zone on the longitudinal profile of the Sutla River Backwater. Investigated site consists of two interconnected basins: transparent Upper Basin with submerged macrophytes and turbid Lower Basin without macrophytes in the littoral zone. In the Upper Basin, abundance and diversity of zooplankton in the pelagial was higher in comparison to the Lower Basin, with prevailing species of genus Keratella as microfilter-feeder, and genera of Polyartha and Trihocerca as macrofilterfeeder rotifers. On the contrary, in the Lower Basin, crustaceans dominated in abundance. Microfilter-feeder cladoceran (Bosmina longirostris) and larval and adult stages of macrofilter-feeder copepod (Macrocyclops albidus) prevailed in the Lower Basin. Fish predation pressure was more pronounced in the pelagial of the Upper Basin, indicated by low cladoceran abundance in the surface layer. Although the studied basins were interconnected, results indicate significant (Mann-Whitney U test, p < 0.05) differences in the zooplankton structure as a potential result of the macrophyte impact on environmental conditions and fish predation pressure.Istraživanje raznolikosti, abundancije i trofiÄke strukture zooplanktona provedeno je tijekom vegetacijskog razdoblja na pelagiÄkim postajama longitudinalnog profila rukavca rijeke Sutle koji se sastoji od dva meÄusobno povezana bazena. Gornji bazen veÄe je prozirnosti i sa submerznim sastojinama makrofita, Donji bazen veÄe je mutnoÄe i bez makrofita. U Gornjem bazenu, brojnost i raznolikost zooplanktona u pelagijalu je bila veÄa u odnosu na Donji bazen, a prevladavali su kolnjaci, detritivorni-mikrofiltratori roda Keratella i algivorni-makrofiltratori rodova Polyartha i Trihocerca. U Donjem bazenu brojnost planktonskih rakova bila je veÄa u odnosu na Gornji bazen, a prevladavali su mikrofiltratorski raÅ”ljoticalci (Bosmina longirostris) te makrofiltratorski liÄinaÄki i adultni stadiji veslonožaca (Macrocyclops albidus). Predacijski pritisak riba bio je izraženiji u pelagijalu Gornjeg bazena, na Å”to ukazuje manja brojnost Cladocera u povrÅ”inskom sloju. Iako su istraživani bazeni meÄusobno povezani, rezultati rada ukazuju na znaÄajne razlike (Mann-Whitney U test, p < 0.05) u strukturi zooplanktona kao rezultat utjecaja makrofita i predacije riba na promjenu uvjeta okoliÅ”a
UGROŽENE RIBE SVIJETA: Squalius svallize (HECKEL & KNER, 1858) (CYPRINIDAE)
Neretva chub Squalius svallize is an endemic vulnerable species, strictly protected in Croatia but not protected in Bosnia and Herzegovina. Populations are declining due to environmental degradation, dams, predators and poaching. A detailed study of current population status, biology and ecology of S. svalize is required.Sval Squalius svallize je endemska osjetljiva riblja vrsta zaÅ”tiÄena u Hrvatskoj, ali nezaÅ”tiÄena u BiH. Njihove populacije opadaju zbog degradacije staniÅ”ta, brana, predatora i nezakonitog ribolova. Stoga se predlaže procijeniti status populacija, biologiju i ekologiju ove vrste