title: Inshore capture-based tuna aquaculture impact on Posidonia oceanica meadows in the eastern part of the Adriatic Sea.
abstract: Mapping and monitoring of the seagrass Posidonia oceanica in the eastern (Croatian) part of the Adriatic Sea since 2004 indicates a significant decline in meadow density in an area impacted by inshore capture-based tuna aquaculture. The density and overall condition of P. oceanica meadows impacted by tuna farms near Fulija Islet was compared to two reference sites (Iž Island and Mrtovnjak Islet). The factors with the most significant influence on P. oceanica meadows were found to be the input of organic matter originating from the cages, as well as high epiphyte biomass caused by nutrient enrichment. Significant differences in nutrient concentrations were found between the sites impacted by tuna farms (Fulija Islet) and the control stations. Shoot density of the P. oceanica meadows decreased at the stations in close vicinity to the tuna farm, which suggests that the tuna farm activity strongly affected the surrounding meadows.
authors.affiliation: Department of Biology, Faculty of Science, Zagreb University, Rooseveltov trg 6, 10000 Zagreb, Croatia. Electronic address: pkruzic@zg.biol.pmf.hr.
authors.forename: Petar
authors.initials: P
authors.lastname: Kružić
authors.affiliation: Department for Research of Sea and Environment, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia; Martinska Laboratory, 22000 Šibenik, Croatia.
authors.forename: Vjeročka
authors.initials: V
authors.lastname: Vojvodić
authors.affiliation: Department for Research of Sea and Environment, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia; Martinska Laboratory, 22000 Šibenik, Croatia.
authors.forename: Elvira
authors.initials: E
authors.lastname: Bura-Nakić
mesh_terms: D035961:Alismatales / Q000502:physiology*; D000818:Animals; D017756:Aquaculture; D004777:Environment; D009792:Oceans and Seas; D014413:Tuna
keywords: Adriatic Sea; Dissolved nutrients; Organic matter; Posidonia oceanica; Tuna farm