Snježana Zrnčić

Croatian Veterinary Institute

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Dražen Oraić

Croatian Veterinary Institute

Ivana Giovanna Zupičić

Croatian Veterinary Institute

Jelka Pleadin

Croatian Veterinary Institute

ŽP

Željko Pavlinec

Croatian Academy of Sciences and Arts

Dragan Brnić

Croatian Veterinary Institute

Ana Vulić

Croatian Veterinary Institute

Greta Krešić

University of Rijeka

ŽM

Željko Mihaljević

Croatian Veterinary Institute

Tina Lešić

Croatian Veterinary Institute

Nina Bilandžić

Croatian Veterinary Institute

Cooperative Institutions

Croatian Veterinary Institute

University of Zagreb

Institute of Oceanography and Fisheries

Technical University of Denmark

Istituto Zooprofilattico Sperimentale delle Venezie

Ifremer

University of Split

Norwegian Veterinary Institute

Swedish Veterinary Agency

Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail

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Detection of Minchinia mytili DNA in mussels (Mytilus galloprovincialis) after a mass mortality event in the Adriatic Sea

Veterinarska stanica (2023)

Ivana Giovanna Zupičić Dražen Oraić Isabelle Arzul Lydie Canier Mathilde Noyer

We investigated a mass mortality event of Mediterranean mussels (Mytilus galloprovincialis) in the Novigrad Sea, Croatia during winter 2022/2023. The mortality rate was up to 70% and was initially linked to an influx of freshwater from the Zrmanja River. Despite mitigation measures that included placing mussels deeper to avoid the influence of freshwater, mortalities continued. Subsequent analysis of 64 samples using cytology, histolology and real-time PCR to exclude listed diseases, yielded negative results. PCR testing for Haplosporidium pinnae revealed the presence of a haplosporidian-like DNA resembling Minchinia mytili. In the study of predominant bacteria, Psychrobacter sp., Colwellia sp., and Vibrio splendidus were detected. Histological examination showed no haplosporidium structures, and in situ hybridisation with probes for detection of Haplosporiidae did not confirmed the presence of M. mytili in mussel tissue. However, our study reports the first detection of M. mytili DNA in the Adriatic Sea, emphasising the need for extensive research and further analysis to determine the exact cause of these mass mortality events and the origin of the haplosporidium DNA.

10.46419/vs.55.4.10

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Imunoprofilaksa u uzgoju lubina: praktična iskustva

Snježana Zrnčić Željko Mihaljević Jelka Pleadin Igor Cvitić Dragan Pezelj

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First record of Marteilia sp. in mussels Mytilus galloprovincialis in Croatia

Diseases of Aquatic Organisms (2001)

Snježana Zrnčić Frédérique Le Roux Dražen Oraić Branko Šoštarić FCJ Berthe

DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials DAO 44:143-148 (2001) - doi:10.3354/dao044143 First record of Marteilia sp. in mussels Mytilus galloprovincialis in Croatia Snjezana Zrncic1,*, Frédérique Le Roux2, Drazen Oraic1, Branko Sostaric1, Franck C. J. Berthe2 1Croatian Veterinary Institute, Department of Fish Diseases and Aquaculture, Savska 143, 10000 Zagreb, Croatia 2IFREMER, Laboratoire de Génétique et Pathologie, BP 133, 17390 La Tremblade, France *E-mail: zrncic@rudjer.irb.hr ABSTRACT: Marteiliosis is a disease of molluscs caused by Marteilia refringens in Europe and M. sydneyi in Australia. During routine examination of cultured mussels Mytilus galloprovinciallis in the northern Adriatic, the occurrence of Marteilia sp. was recorded with a prevalence of 5%. This parasite was not detected in flat oysters reared in the same area. The affiliation of the detected parasite in M. galloprovinciallis was confirmed by in situ hybridization using a M. refringens probe, specific at the genus level. DNA of these infected mussels originating from the same area will be used to clarify the taxonomic position of this species within the genus Marteilia using a molecular approach. KEY WORDS: Marteilia maurini · Parasite · Mytilus galloprovincialis · Detection · Taxonomy Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in DAO Vol. 44, No. 2. Online publication date: March 09, 2001 Print ISSN: 0177-5103; Online ISSN: 1616-1580 Copyright © 2001 Inter-Research.

10.3354/dao044143

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Workshop: How outputs from EU projects can upgrade health management in the Mediterranean aquaculture

Bulletin of the European Association of Fish Pathologists (2022)

Snježana Zrnčić Francesc Padrós S Tavornapanich Niels Lorenzen Donatella Volpatti

Aquaculture of European sea bass ( Dicentrarchus labrax ) and gilthead sea bream ( Sparus aurata ) is an essential activity in the Mediterranean basin. Several EU Horizon 2020 and regional projects are focusing on the improvement of their farming performance. This workshop aimed at displaying, sharing and discussing projects’ achievements among interested colleagues engaged to work with fish diseases. The most innovative research outputs aiming to improve the European mariculture were presented during this workshop, including updates from EU Horizon 2020 projects MedAID, PerformFISH, ParaFishControl, FutureEUAqua and the Italy-Croatia Interreg project AdriAquaNet.

Mariculture

Dicentrarchus

Sea bass

Mediterranean Basin

Black Sea

10.48045/001c.35854

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Quantification of Biosecurity Measures in Mediterranean European Seabass and Gilthead Sea Bream Farms

Margarida Gomes Leandro Jacob Zornu Alain Breton Nadia Chérif Bernardo Basurco

Biosecurity

10.2139/ssrn.4858567

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Factors affecting consumers´ preferences for products from aquaculture

Croatian Journal of Food Science and Technology (2020)

Greta Krešić Elena Dujmić Dina Lončarić Anamarija Buneta Nikolina Liović

Fish is an essential component of a balanced and healthy diet and the present demand for fish cannot be sustained by capture fisheries. Consequently, aquaculture is currently the fastest growing food production industry in the world, contributing to more than half of the global fish production intended for human consumption. Although the image of aquaculture is not necessarily negative per se, consumers around the world still have a greater preference for wild fish. Therefore, the aim of this review is to critically evaluate some of the factors which may affect consumer preferences: socio-demographic characteristics of consumers, quality and safety perception of products from aquaculture, price of aquaculture products and socio-economic aspects of aquaculture, and concerns about the negative impact of aquaculture on the environment and about the sustainability of the production method. A literature review confirmed that age is the most influential sociodemographic variable. Being younger, female or having higher income and a higher education level can result in greater preference for aquaculture products. The image of farmed fish suffers from a perception of lower quality in terms of taste, health and nutritional value and, in some cases, even from low safety perceptions. On the other hand, farmed fish is believed to have lower prices and greater availability. Additionally, economic benefits are one of the main advantages of aquaculture. Mixed results emerge, however, with regard to the environmental impact of aquaculture, but sustainable production may compensate for possible environmental concerns and drive preference for farmed fish. Depending on how consumers weigh up the advantages and disadvantages of both aquaculture and its products, this will result in a preference for wild or farmed fis

Fish products

10.17508/cjfst.2020.12.2.17

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Occurrence of enteric redmouth disease in rainbow trout (Oncorhynchus mykiss) on farms in Croatia

Acta Veterinaria Hungarica (2002)

Dražen Oraić Snježana Zrnčić Branko Šoštarić

During the spring of 1996 and autumn of 1997 unusual mortality outbreaks among rainbow trout fry and yearlings occurred at two different trout farms, resulting in mortality of 20 and 10 per cent, respectively. Generally, the affected fish, swimming at the water surface, were reluctant to eat and were dark pigmented with visible haemorrhages around and within the oral cavity. Bacterial isolates from moribund fish from both cases were identified as Yersinia ruckeri by standard biochemical tests and API 20E. The isolated strains were found to be sensitive to tetracycline, chloramphenicol, co-trimoxazole, nalidixic acid, flumequine, enrofloxacin, carbenicillin and gentamicin. Microplate agglutination assay confirmed that both isolates belonged to serotype O1. The pathogenicity of the isolated bacteria was confirmed by challenge experiment. Titres of specific antibodies were determined in the sera of survivors. The titre was highest on the 21st day postchallenge and was detectable until the 81st day.

Yersinia ruckeri

Carbenicillin

Flumequine

10.1556/avet.50.2002.3.4

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Citations (15)

Determination of copper in food of animal origin and fish in Croatia

Food Control (2012)

Nina Bilandžić Mаја Đokić Marija Sedak Ivana Varenina Božica Solomun Kolanović

Fish products

Marine fish

10.1016/j.foodcont.2012.03.020

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Citations (17)

Impact of varying cultivation depths on growth rate and survival of the European flat oyster Ostrea Edulis, L.

Aquaculture Research (2007)

Snježana Zrnčić Dražen Oraić Željko Mihaljević Davor Zanella

European oysters, Ostrea edulis, L. were kept in plastic mesh cages at three depths at two commercial oyster farm sites within Mali Ston Bay, Croatia, between April 2004 and August 2005. Oysters from each cultivation depth were sampled at both sites at approximately 3-month intervals for growth parameters, mortality rate control and condition index calculation. The growth parameters of experimental groups from both sites only revealed a considerable distinction for shell length growth (P=0.011). Total weight gain and soft tissue weight gain were the highest for groups cultivated in the middle of the water column as compared with the top and bottom positions for both studied sites. Survival rates were very similar in all experimental groups, situated at different depths of both experimental sites, and differences in the mortality peak during the summer months were not significant. Condition indices fluctuated throughout the trial period and were the highest in spring and summer, with a reduction during the winter months and improvement again in the spring.

Ostrea edulis

Condition index

10.1111/j.1365-2109.2007.01804.x

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Severe helminthic infection of the wild brown trout (Salmo trutta) in Cetina River, Croatia

Bulletin of the European Association of Fish Pathologists (2009)

Ivona Mladineo Snježana Zrnčić Dražen Oraić

Elevated mortalities of brown trout (Salmo trua m. fario ) and grayling (Thymallus thymallus) were noticed in the Cetina River at the end of the February. Local anglers collected the samples of moribund fish and submied them to the laboratory for examination. Ectoparasitological, bacteriological and virological examination did not reveal any ectoparasite, bacteria or viral agents, however pyloric caeca and intestine were tightly packed with mixed infection of Echinorhynchus truae (Acanthocephala, Echinorhynchidae) and Cyathocephalus truncatus (Cestoda, Spathebothriidae). Histopathology revealed complete desquamation of functional epithelial mucosa in the intestine. In between aached parasites, intestinal lumen was filled with thick necrotic tissue mass of sloughed enterocytes, mucus, bacteria and lymphocytes. While cestodes rarely cause death, and the acanthocephalan proboscis did not perforated intestinal wall, ruling out general septicaemia as a cause of death, histopathological examination suggests that high load of intestinal helminths triggered long-term malnutrition, eventually leading to trout emaciation and mortalities.

Brown trout

Acanthocephala

Grayling

Emaciation

Histopathology

Intestinal mucosa

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Citations (7)