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Vidjak O.,Croatian Institute Of Oceanography And Fisheries | Bojanic N.,Croatian Institute Of Oceanography And Fisheries | Matijevic S.,Croatian Institute Of Oceanography And Fisheries | Kuspilic G.,Croatian Institute Of Oceanography And Fisheries | And 4 more authors.
Acta Adriatica | Year: 2012

The objectives of this paper were to determine the main environmental drivers of zooplankton variability in coastal waters adjacent to urban areas and to evaluate the differences in zooplankton abundance and population structure in relation to chemical and biological parameters in the water column. Samples were collected seasonally from May 2006 to January 2009 at 8 sampling sites in the bays and channels along the eastern Adriatic coast. Zooplankton population structure showed high similarity within the investigated region, especially evident in the homogeneity of copepod community composition, where relative importance of the individual species showed characteristic high ranking of small and medium-sized taxa. Zooplankton numerical variability primarily responded to seasonal variation in water temperature and spatial variation in salinity, but spatial distribution of the collected data showed that abundances were also linked to chemical and biological parameters generally used as descriptors of water quality. This indicates that zooplankton community size reflects the trophic status of an area and supports the use of zooplankton studies as an auxiliary method in the evaluation of the trophic state of coastal waters.

Kozul V.,Institute for Marine and Coastal Research | Glavic N.,Institute for Marine and Coastal Research | Tutman P.,Croatian Institute Of Oceanography And Fisheries | Bolotin J.,Institute for Marine and Coastal Research | Onofri V.,Institute for Marine and Coastal Research
Animal Reproduction Science | Year: 2011

Green wrasse, Labrus viridis (Linnaeus, 1758), is an endangered species in the southern Adriatic Sea, but it is also of interest for potential rearing in polyculture with other commercial species for the repopulation of areas where it is endangered or as a new aquaculture species. A parental stock of the green wrasse was kept in aquaria for six years. The spawning, embryonic and early larval development maintained under controlled laboratory conditions are described and illustrated. The average diameter of newly spawned eggs was 1.01 ± 0.03. mm. Mature and fertilized eggs were attached to the tank bottom by mucus. Hatching started after 127. h at a mean temperature of 14.4 ± 0.8°C. The average total length of newly hatched larvae was 4.80 ± 0.22. mm. Absorption of the yolk-sac was completed after the 5th day when larvae reached 5.87 ± 0.28. mm.Larvae were fed with the rotifers Brachionus plicatilis. The pigmentation of L. viridis larvae is similar to that of Labrus merula and Labrus bergylta, but the main differences between these species are in the size of larvae and the development time of the melanophores on the anal fin-fold (five days later than with L. merula) and on top of the head (nine days earlier than with L. merula). © 2011 Elsevier B.V.

Kapetanovic T.,Free University of Berlin | Jahn R.,Free University of Berlin | Redzic S.,University of Sarajevo | Caric M.,Institute for Marine and Coastal Research
Nova Hedwigia | Year: 2011

Diatom populations of five microhabitats of a poor (Sphagnum) fen in Bijambare Protected Landscape area were studied. The fen is situated at an altitude 930 m a.s.l., on a slope of Mt. Zvijezda near Sarajevo. The major part of the fen is covered with Sphagnum recurvum and Sphagnum subsecundum, while at the outer borders communities are dominated by Carex spp. Samples were taken in May, July and October 2007 and May 2008, in vegetationally different microhabitats by squeezing water from mosses and taking material from pools. The diatom flora was studied under LM and SEM. The part of the fen that is characterized by Sphagnum species has a very poor diatom assemblage dominated by acidobiontic and acidophilous species such as Eunotia exigua, E. glacialis, E. paludosa and Pinnularia rhombarea. In the border area of the fen, diatom assemblages become richer with Nitzschia acidoclinata, Eolimna minima and Eunotia bilunaris as dominating species. According to published data, 45 taxa are recorded here for the first time for Bosnia and Herzegovina such as: Chamaepinnularia mediocris, Navicula digitulus, Navicula medioconvexa and Placoneis hambergii. Sellaphora bosniaca and Sellaphora hafnerae are described here as a new species. © 2011 J. Cramer in Gebr.

Sprem J.S.,Dubrovnik Natural History Museum androviceva 1 | Dobroslavic T.,University of Dubrovnik | Kozul V.,Institute for Marine and Coastal Research | Prusina I.,University of Dubrovnik | And 2 more authors.
Cahiers de Biologie Marine | Year: 2014

Specimens of Lophotus lacepede Giorna, 1809 and Lampris guttatus (Brünnich, 1788) were collected in the south Adriatic Sea. L. lacepede was collected in Kupari (♀, TL = 139 cm, W = 5.4 kg) on October, 2011 and L. guttatus was collected in Mali ston Bay (♀, TL = 88 cm, W = 20 kg) on January 2012. Both species are very rare in the Adriatic Sea.

Antolovic N.,Institute for Marine and Coastal Research | Kozul V.,Institute for Marine and Coastal Research | Safner R.,University of Zagreb | Glavic N.,Institute for Marine and Coastal Research | Bolotin J.,Institute for Marine and Coastal Research
Cybium | Year: 2010

The embryonic and yolk-sac larval development of laboratory-reared saddled bream Oblada melanura (Linnaeus, 1758) is described. The fertilized eggs were pelagic and transparent with one oil globule with a mean diameter of 0.833 ± 0.055 mm and a range from 0.755 to 0.928 mm. Embryonic development lasted 32h30 min at 21.9 ± 0.4°C. Newly hatched yolk-sac larvae were 1.992 ±0.111 mm in length. The yolk-sac was completely absorbed after 56 hours, when larvae reached 3.050 ± 0.041 mm. The mouth started to open 48 h after hatching and was functional after 60 h with an opening diameter of 0.180-0.210 mm. Changes in length and shape of yolk-sac larvae during the first three days after hatching are also presented.

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