Histološka i morfometrijska analiza probavila dagnje Mytilus galloprovincialis (Lamarck, 1819) u Malostonskom zaljevu

master's thesis

• Title (english): Histological and morphometric analysis of the digestive system of the mussel Mytilus galloprovincialis (Lamarck, 1819), in the Bay of Mali Ston
• Author: Diana Ivošević
• Mentor: Ana Gavrilović (mentor)
• Mentor: Gordana Lacković-Venturin (sumentor)
• Mentor: Romana Gračan (pomoć pri izradi, neposredni voditelj)
• Committee member: Ana Gavrilović (član povjerenstva)
• Committee member: Gordana Lacković-Venturin (član povjerenstva)
• Committee member: Zdravko Dolenec (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2013, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Subtidalne jedinke dagnji za ovo istraživanje uzorkovane su na sedam postaja u Malostonskom zaljevu. Histološkim pregledom probavnog sustava, kristalni štapić nije utvrđen u svih jedinki, što ukazuje na postojanje cikličkih promjena u procesu hranjenja i izvanstanične probave. Kod jedinki uzorkovanih na dubini četiri metra, indeks kondicije probavnih tubula varirao je ovisno o postaji, pri čemu je varijabla koja je najviše utjecala na ove promjene bila količina partikularne tvari, tj. dostupne hrane. Na postaji Bistrina, značajno viši indeks kondicije dagnji s dubine od jednog metra iz studenog, može se povezati s razlikom u salinitetu u usporedbi s veljačom, kao i manjom dostupnošću hrane u usporedbi s dubinom četiri metra. Ovaj rad pokazao je da na indeks kondicije probavnih tubula dagnje utječu brojni biotski i abiotski čimbenici, od kojih je najvažniji količina partikularne tvari, kako organske tako i anorganske. Uz navedeno, važna je i dubina na kojoj se jedinke uzgajaju.

Abstract (english)

In this study subtidal specimens of mussel were sampled at seven different locations in the Bay of Mali Ston. Histological examination of the digestive system was performed, and crystalline style was not found in all specimens, indicating the existence of a cyclical change in the process of feeding and extracellular digestion. For specimens sampled at a depth of four meters, condition index of digestive tubules varied depending on the location, where the variable that affected by these changes the most was the quantity of the particulate matter, i.e. available food. By the statistical comparison of the mean values of the condition index of the digestive tubules on seven sampling stations in the Bay of Mali Ston, four groups of similar locations were identified: Banja and Sutvid, Kuta and Duba, Brijesta and Bistrina,and Soca. At Bistrina station significantly higher condition index of mussels from the depth of one meter in November, can be related to differences in salinity recorded in February, as well as to less availability of food as compared with those at a depth of four meters. This study has shown that the condition index of digestive tubules of mussels is affected by many biotic and abiotic factors, most important being the amount of particulate matter, both organic and inorganic. In addition, the depth at which specimens are cultivated is also important.

• Keywords: dagnja; intertidalna; subtidalna; probavni tubuli; indeks kondicije
• Keywords (english): mussel; intertidal; subtidal; digestive tubules; condition index
• Language: croatian
• URN:NBN: urn:nbn:hr:217:748907
• Study programme: Title: Biology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra edukacije biologije (magistar/magistra edukacije biologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-04-26 09:43:43