1,721,177 research outputs found
Checklist of the Adriatic Sea Fishes 2589
No full textLipej, Lovrenc, Dulčić, Jakov (2010): Checklist of the Adriatic Sea Fishes 2589. Zootaxa 2589 (1): 1-92, DOI: 10.11646/zootaxa.2589.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2589.1.
Evidence approach to checklists: critical revision of the checklist of the Adriatic Sea fishes
No full textKovačić, Marcelo, Lipej, Lovrenc, Dulčić, Jakov (2020): Evidence approach to checklists: critical revision of the checklist of the Adriatic Sea fishes. Zootaxa 4767 (1): 1-55, DOI: 10.11646/zootaxa.4767.1.
Species-Area Relationship (SAR)models as tools for estimating faunal biodiversity associated with habitat builder species in sensitive areas: the case of the Mediterranean stony coral (Cladocora caespitosa)
No full textBiodiversity associated with the Mediterranean stony coral Cladocora caespitosa (Linnaeus, 1767)was investigated at three levels: “microscale”, focused on macrobenthic invertebrates within colonies; “mesoscale”, focused on epibenthic megafauna among colonies; “macroscale”, focused on associated ichthyofauna. The aim was to quantify associated diversity in terms of species richness, testing the efficiency of colony size (surface covered by a single colony)for the “microscale”, and colony density or total coral coverage for “meso-” and “macroscale” as predictors and the consistency of models based on Species-Area Relationship (SAR)for those estimations. At level of “microscale”, colony size was a good predictor, with richness of invertebrates increasing with the increasing of surface covered by each colony of C. caespitosa, following Arrhenius model. At levels of “mesoscale” and “macroscale”, richness of epibenthic megafauna and fish were not related neither to colony density nor total coral coverage, but to sampled area, and frequency-based estimates of richness were used. The importance of C. caespitosa varied according to the investigation level, with most of taxa richness detected at the level of “microscale”
Evidence-based checklist of the Mediterranean Sea fishes
No full textKovačić, Marcelo, Lipej, Lovrenc, Dulčić, Jakov, Iglesias, Samuel P., Goren, Menachem (2021): Evidence-based checklist of the Mediterranean Sea fishes. Zootaxa 4998 (1): 1-115, DOI: 10.11646/zootaxa.4998.1.
Ecological patterns of polychaete assemblages associated with the Mediterranean stony coral Cladocora caespitosa (Linnaeus, 1767): a comparison of sites in two biogeographic zones (Adriatic and Aegean Sea)
Full text linkThe Mediterranean stony coral Cladocora caespitosa (Linnaeus, 1767) is a well-known habitat builder, and as such hosts a
diversified faunal assemblage. Although polychaetes are one of the most abundant and diverse macrobenthic groups associated
with C. caespitosa colonies, our knowledge of their ecological features in this association is still limited. The aim of this paper
was to gather and compare the most comprehensive data available on polychaetes associated with C. caespitosa in the Adriatic
and the Aegean Seas, and to test for differences between these geographic areas. To this end, differences were tested in terms
of: (i) richness and structure of polychaete assemblages; (ii) feeding and functional traits of assemblages; (iii) the main factors
influencing those aspects, (iv) the relationship between polychaete assemblages richness and Cladocora colony size, estimated
richness. Differences were observed between the Adriatic and the Aegean assemblages, in terms of richness, species composition
and relative proportion of the dominant feeding guild (filter feeders most abundant in the Aegean and carnivores in the Adriatic)
and motility mode (sessile most abundant in the Aegean and motile in the Adriatic). Conversely, cosmopolitan and Atlanto-Mediterranean species dominated the assemblages in both geographic areas, and the same Species-Area Relation model proved to be effective for richness estimation in both geographic areas
Comparison of benthic indices for the evaluation of ecological status of three Slovenian transitional water bodies (northern Adriatic)
No full textBenthic indicators are important tools for the classification of coastal and transitional water bodies. The aim of the work was to assess for the first time the Environmental Status (ES) of Slovenian transitional waters, comparing the following biotic indices: richness, Shannon-Weaver diversity, AMBI, M-AMBI, BENTIX and BITS indices. A total of 13 stations were sampled with a Van Veen grab, in three ecosystems in the northern Adriatic. Samples were sieved and sorted, invertebrates identified and counted. The anthropogenic impact was estimated with professional judgement. Richness and diversity showed a good response to anthropogenic pressure. Conversely, indices based on sensitivity/tolerance groups did not showed a clear distinction between more and less impacted ecosystems. In particular BENTIX underestimated the ES, while with BITS there was a overestimation. The best evaluation was obtained with M-AMBI, because even if based on a sensitivity/tolerance approach, it considered also the structural aspect of the community
Coralline algae on biogenic formations in marine waters off Slovenia (northern Adriatic Sea)
Full text linkTwo major biogenic formations, composed mainly by dead corallites of the Mediterranean stony coral (Cladocora caespitosa), have been recently studied in Slovenian marine waters. The paper presents new data about the presence of coralline algae on the biogenic formation situated off Cape Ronek and off Cape Debeli rtič. Coralline algae are very important for the creation, development and maintenance of calcareous bio-concretions that offer new niches for many invertebrates and other algae. They are listed as important builders of the coralligenous biocoenosis in the “Draft Lists of coralligenous/maërl populations and of main species to be considered by the inventory and monitoring” of the RAC-SPA, and should be further deeply studied and appropriately protected
Combined climate and chemical stressors
Full text linkFicopomatus enigmaticus, a reef-forming serpulid, has emerged as a promising candidate for biomonitoring and ecotoxicology studies. Recent research has focused on adult stress responses, highlighting the need to understand population-specific responses. This study employed a multi-biomarker approach to investigate how F. enigmaticus adults from two populations in the NE Adriatic (Site A) and NE Tyrrhenian (Site B) responded to chronic exposure to heat and chemical stress (dimethyl sulfoxide, DMSO), individually and in combination. The analysis detected significant differences in protein content and the activities of superoxide dismutase (SOD) and glutathione S-transferase (GST) between populations. Notably, no oxidative damage (measured as lipid peroxidation, LPO) was detected in any population or treatment. Similarly, no significant differences were detected in the integrated biomarker response index (IBRv2i). However, lower IBRv2i values at Site A suggested reduced stress conditions, possibly indicating that this site may have lower baseline stress. Overall, treatment effects were limited and site-specific: only the combined heat and DMSO exposure at Site A lowered GST activity compared to heat stress alone. Nevertheless, both populations exhibited broadly similar biochemical response patterns to stress. Our findings deepen the understanding of stress physiology in F. enigmaticus, underscoring the ecological importance of multi-stressor approaches in environmental monitoring
Biometry, sexual dimorphism and reproductive biology of selected crabs (crustacea: decapoda) in the northern adriatic sea
No full textPovzetek
Raziskovana je bila distribucija in struktura populacije 4 vrst rakovic (Decapoda: Crustacea), Medorippe lanata, Goneplax rhomboides, Liocarcinus depurator in Liocarcinus vernalis, glede morebitnih učinkov na ribištvo in uporabo vlečnih mrež na njihovo populacijo. Raziskava je bila narejena v severnem Jadranu.
Kot del ribiške odprave, je bilo decembra 2013 v vodah severnega Jadrana ulovljenih skupaj 1100 primerkov, vseh 4 vrst. Rakovice so bile zbrane iz 32 vzorčnih postaj. Globina voda se je gibala med 10,6 m in 84 m. Izvedene so bile biometrične meritve ter prešteto je bilo število jajčec. (L. depurator in L. vernalis).
Razmerje samic in samcev (L. depurator, L. vernalis, M. lanata in G. rhomboides) je bilo sledeče - 1:1.5, 1:2, 1:0.8 in 1:57. Med vrstama L. depurator in L. vernalis ni bilo pomembnejših razlik v številu jajčec. Nobene pomembne povezave ni bilo ugotovljene med zunanjim oklepom (širina / dolžina) in številom jajčec teh rakovic. G. rhomboides ima očitno večji Fultonov pogojni indeks kot ostale vrste. Povezava med globino vode in merjenimi biometričnimi parametri so dale šibke, vendar pomembne rezultate, v glavnem pri samcih L. Vernalis. Rakovic obeh spolov je bilo obilo na vseh proučevanih globinah in ni bilo pomembnejše povezave med globino morja in številom rakovic. Samo v primeru (M. Lanata) je bila razporeditev le teh bolj izrazita na globinah manjših od 50 metrov, ne glede na spol. Samci L.vernalis so bili precej večji od samic, kar kaže na velikost spolne dvoličnosti. Ta velikost dvoličnosti je bila opažena pri M. lanata na stopnji zunanjega oklepa, brez večje razlike v mokri teži. Vseeno pri tej vrsti so bile samice večje, pri merjenju zunanjega oklepa, kot samci.The distribution and population structure of four species of crabs (Decapoda: Crustacea), Medorippe lanata, Goneplax rhomboides, Liocarcinus depurator and Liocarcinus vernalis were investigated for the possible effect of fishery and trawling activities on their populations. The study was performed in the Northern Adriatic Sea.
A total of 1100 specimens of four species were caught from waters off the northern Adriatic Sea in December 2013 as a part of fishery expedition. All crabs were collected from 32 sampling stations. The water depth ranged from 10.6 to 84 m. Biometric measurements were performed and the numbers of eggs were counted in L. depurator and L. vernalis.
The ratio of female to male (F/M) in L. depurator, L. vernalis, M. lanata and G. rhomboides were 1:1.5, 1:2, 1:0.8 and 1:57, respectively. No significant difference was found in the number of eggs between the two species L. depurator and L. vernalis. No significant correlation was found between carapace width/length and number of eggs in these crabs. G. rhomboides was shown to have obviously greater Fulton’s condition index than other species. Correlation between water depth and all the measured biometric parameters gave weak but significant results mainly in females of L. vernalis. Crabs of both sexes were abundant at all studied depths and no significant correlation was found between depth and the number of crabs. Only in case of M. lanata, the distribution was more pronounced at depths lower than 50 m regardless of sex. Males of L. vernalis were significantly larger than females which indicate sexual size dimorphism. This size dimorphism was also observed in M. lanata at carapace level without significant difference in wet weight. However, in this species the females were larger in carapace dimensions than males
Feeding habits of the small spotted catshark (Scyliorhinus Canicula) in the Northern Adriatic
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