Reproduktivne preferencije gavčice, Rhodeus amarus (Bloch, 1872) prema školjkašima iz porodice Unionidae

Prenz, Petra

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master's thesis

Reproduktivne preferencije gavčice, Rhodeus amarus (Bloch, 1872) prema školjkašima iz porodice Unionidae

Zagreb: University of Zagreb, Faculty of Science, 2017. urn:nbn:hr:217:485326

Prenz, Petra

University of Zagreb
Faculty of Science
Department of Biology

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APA 6th Edition

Prenz, P. (2017). Reproduktivne preferencije gavčice, Rhodeus amarus (Bloch, 1872) prema školjkašima iz porodice Unionidae (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:485326

MLA 8th Edition

Prenz, Petra. "Reproduktivne preferencije gavčice, Rhodeus amarus (Bloch, 1872) prema školjkašima iz porodice Unionidae." Master's thesis, University of Zagreb, Faculty of Science, 2017. https://urn.nsk.hr/urn:nbn:hr:217:485326

Chicago 17th Edition

Harvard

Prenz, P. (2017). 'Reproduktivne preferencije gavčice, Rhodeus amarus (Bloch, 1872) prema školjkašima iz porodice Unionidae', Master's thesis, University of Zagreb, Faculty of Science, accessed 26 January 2025, https://urn.nsk.hr/urn:nbn:hr:217:485326

Vancouver

Prenz P. Reproduktivne preferencije gavčice, Rhodeus amarus (Bloch, 1872) prema školjkašima iz porodice Unionidae [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2017 [cited 2025 January 26] Available at: https://urn.nsk.hr/urn:nbn:hr:217:485326

IEEE

P. Prenz, "Reproduktivne preferencije gavčice, Rhodeus amarus (Bloch, 1872) prema školjkašima iz porodice Unionidae", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:217:485326

Cite this item: https://urn.nsk.hr/urn:nbn:hr:217:485326

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Title	Reproduktivne preferencije gavčice, Rhodeus amarus (Bloch, 1872) prema školjkašima iz porodice Unionidae
Title (english)	Reproductive preferences of the European bitterling, Rhodeus amarus (Bloch,1872) according to bivalves from the Unionidae family
Author	Petra Prenz
Mentor	Jasna Lajtner (mentor)
Committee member	Jasna Lajtner (predsjednik povjerenstva)
Committee member	Renata Šoštarić (član povjerenstva)
Committee member	Ana Galov (član povjerenstva)
Committee member	Ivana Buj (član povjerenstva)
Granter	University of Zagreb Faculty of Science (Department of Biology) Zagreb
Defense date and country	2017-09-26, Croatia
Scientific / art field, discipline and subdiscipline	NATURAL SCIENCES Biology
Abstract	Gavčica, Rhodeus amarus (Bloch, 1782), je slatkovodna riba široko rasprostranjena u Europi koja koristi školjkaše iz porodice Unionidae za polaganje jaja (ovipoziciju) te embrionalni razvoj. Poznato je da gavčica koristi veći broj vrsta školjkaša iz ove porodice kao domaćine za ovipoziciju, ali s različitom razinom preferencije. Cilj ovog istraživanja bio je pokazati koje vrste školjkaša gavčica izabire kao najprikladnije domaćine, s posebnim naglaskom na autohtone i invazivne vrste školjkaša. Istraživanje je provedeno kroz dva eksperimenta (dugoročni i kratkoročni) sa živim ribama i pet vrsta školjkaša (autohtone vrste Anodonta anatina, Unio crassus, U. pictorum i U. tumidus te invazivna vrsta Sinanodonta woodiana). Dugoročni eksperiment trajao je tri tjedna i korišten je samo za dokazivanje preferencije, a kratkoročni (24 satni) za potvrđivanje preferencije domaćina i isključivanje mogućnosti iskrivljenih rezultata nastalih zbog školjkaševa izbacivanja embrija gavčice. Rezultati oba eksperimenta su pokazali da postoji značajna razlika u odabiru školjkaša. Gavčice su za ovipoziciju odabirale sve autohtone vrste, ali ne i invazivnu vrstu školjkaša. Najveća brojnost jaja i ličinki gavčice zabilježena je kod vrste Anodonta anatina, no rezultati iskazani na jedinicu površine škrga pokazali su da je vrsta Unio crassus njihov prvi izbor. Unatoč trenutnom konzervacijskom statusu gavčice (najmanje zabrinjavajući), ona potencijalno može postati ugrožena, ako se ne spriječi širenje invazivne vrste S.woodiana s kojom su europski autohtoni školjkaši u direktnoj kompeticiji.
Abstract (english)	Bitterling, Rhodeus amarus (Bloch, 1872), is a freshwater fish widely spreaded in Europe which uses unionid mussels for oviposition and embryonic development. It has been known that bitterling uses a wider range of species from this family as hosts for oviposition, but with different preference. The point of this study was to show what species of mussels bitterlings choose as the most appropriate hosts, with observations made among native and invasive mussel species. The study conducted two experiments (long-term and short-term experiment) with live fishes and five species of mussels (native species: Anodonta anatina, Unio crassus, U. tumidus and U. pictorum, and invasive species Sinanodonta woodiana). Long-term experiment lasted for three weeks and was used only to proove existence of preference, and short-term experiment (24 h) to affirmate host preferences and to exlude possible errors in results, due to mussels ability to eject bitterling eggs and embryos. Results of both experiments showed that there is a significant difference in mussel choice. Bitterling spawned only in native species of mussels. The greatest number of bitterling eggs and embryos was noted for A.anatina, but the results shown on the surface unit of the mussels gills showed that they preffered most U.crassus. Despite the current conservation status of bitterling (LC-Least concern), it can potentialy become vunerable if the invasion of S. woodiana, with which the European native mussels are in direct competition, does not get prevented.
Keywords
Keywords (english)
Language	croatian
URN:NBN	urn:nbn:hr:217:485326
Study programme	Title: Experimental Biology Study programme type: university Study level: graduate Academic / professional title: magistar/magistra eksperimentalne biologije (magistar/magistra eksperimentalne biologije)
Type of resource	Text
File origin	Born digital
Access conditions	Open access Embargo expiration date: 2018-09-26
Terms of use
Repository	Repository of the Faculty of Science
Created on	2017-12-07 09:09:22