Sastav pridnenih zajednica dubokoga Jadrana i struktura populacija gospodarski najvažnijih vrsta

doctoral thesis

• Title (english): The composition of demersal communities of deep Adriatic and the population structure of the commercially most important species
• Author: Igor Isajlović
• Mentor: Nedo Vrgoč (mentor)
• Committee member: Tatjana Bakran-Petricioli (član povjerenstva)
• Committee member: Svjetlana Krstulović Šifner (član povjerenstva); MBZ: 239145
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2012, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology
• Universal decimal classification (UDC): 57 - Biological sciences. Physical anthropology. Biodiversity

Abstract

Ovaj rad je napravljen na osnovu podataka prikupljenih tijekom istraživanja pridnenih zajednica u okviru međunarodnih projekata EU MEDITS i FAO AdriaMed Deep Sea Survey. Cilj ove disertacije je opisivanje sastava pridnenih zajednica i demografske strukture populacija gospodarski najvažnijih vrsta dubokog Jadrana, usporedba sastava pridnenih zajednica obzirom na dubinu mora, proučavanje promjena u razdoblju od 1994. do 2008. godine, te davanje preporuka za održivo gospodarenje i zaštitu. Tijekom istraživanja ukupno je zabilježeno 339 vrsta riba, rakova i glavonožaca na cjelokupnom području. U najdubljem dijelu zabilježene su i tri nove vrste za Jadran. Najzastupljenije vrste na području kontinentskog slaza od 200 do 800 m prema masi bile su Lepidopus caudatus, Merluccius merluccius te Micromesistius poutassou, a u najdubljim dijelovima Jadrana Galeus melastomus te Trachyrhynchus trachyrhynchus. U razdoblju od 1994. do 2008. godine zabilježen je pad gustoće populacija u svim dubinskim područjima, osobito u plićem dijelu Jadrana. Multivarijatna analiza sastava pridnenih zajednica pokazala je postojanje značajne razlike između različitih područja dubokog dijela Jadrana. Uočena je stratifikacija demografske strukture populacija najvažnijih vrsta obzirom na dubinu. Trenutno stanje pridnenih zajednica dubokog dijela Jadrana upućuju na potrebu uvođenja preventivnih mjera zaštite tog područja.

Abstract (english)

This thesis is based on samples and data collected during investigation of demersal communities conducted in a framework of international projects EU MEDITS from 1994 to 2008 and FAO AdriaMed from 2008 to 2010. Objectives of this thesis were description of composition of demersal communities and demographic structure of populations of most important species living in the deep Adriatic, comparative analysis of composition of demersal communities with respect to depth, analysis of changes that occurred in a period from 1994 to 2008, and creation of recommendations for the protection of the investigated area. During this study total of 339 species of fish, crustaceans and cephalopods were recorded in the entire study area. Three species new for the Adriatic were recorded in the deepest part. On the continental slope, most common species by biomass were Lepidopus caudatus, Merluccius merluccius and Micromesistius poutassou, while in the deepest part of the Adriatic most common species were Galeus melastomus and Trachyrhynchus trachyrhynchus. In a period from 1994 to 2008 a decrease in population densities were noted in all depth strata and it was especially evident in shallow areas. Multivariate analysis of composition of demersal communities showed statistically significant differences between areas in the deep Adriatic. Further more, demographic stratification of population structures of the most important species was noted with respect to depth. The recent state of demersal communities in the deep part of Adriatic indicates a need for introduction of preventive protection measures for this area.

• Keywords: Duboki Jadran; pridnene zajednice; gustoća populacija; EU MEDITS; FAO AdriaMed
• Keywords (english): Deep Adriatic; demersal communities; population density; EU MEDITS; FAO AdriaMed
• Language: croatian
• URN:NBN: urn:nbn:hr:217:040970
• Study programme: Title: Biology; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje biologija (doktor/doktorica znanosti, područje prirodnih znanosti, polje biologija)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-06-08 10:05:16