U radu su prikazani rezultati istraživanja dendroflore Gradskog parka na području grada Bihaća, koji je smješten u sjeverozapadnom dijelu Bosne i Hercegovine, podno planina Plješevice i Grmeč te brda Debeljača. Kroz njega protječu rijeka Una te njeni pritoci Klokot i Privilica. Tijekom florističkog istraživanja koje je provedeno na obuhvatnom području Gradskog parka u Bihaću, tijekom 2016. godine, zabilježeno je 80 svojti iz 30 porodica, s ukupno 663 jedinke. U parku dominiraju kritosjemenjače (66 svojti; 83 %), među kojima su dvosupnice (78; 97 %), u većoj mjeri zastupljenije nego jednosupnice (2; 3 %). Golosjemenjače su zastupljene s 14 svojti (17 %). S najvećim brojem vrsta ističe se porodica Rosaceae (10 svojti; 13 %) od ukupno 80 svojti. U pogledu habitusa (Erhardt et al., 2002.) dominiraju stabla (45 svojti; 56 %), potom slijede grmovi (32 svojte; 40 %), zatim penjačice (2 svojte; 3 %) i puzavice (1 svojta; 1 %). Listopadne svojte (60; 75 %) su zastupljenije od vazdazelenih (19; 24 %) i zimzelenih (1; 1 %). Najbrojnija svojta u parku je hibridna platana (Platanus x hispanica Münch) sa 115 jedinki. Prema geografskom podrijetlu alohtone svojte (42; 52 %) su zastupljenije od autohtonih (35; 44 %) i hibrida (3; 4 %). Od 42 determinirane alohtone svojte u invazivne spadaju tri (7 %), dok u egzote spada 39 svojti (93 %). Od 80 zabilježenih svojti, u kultivare spada 15 svojti (19 %), a u hibride tri svojte (4 %). U pogledu krajobraznih vrijednosti Gradski park u Bihaću, koji je izgrađen 1888. godine, veoma je bogat dendrološkim svojtama. Neke od njih potječu iz vremena podizanja parka. Navedeni objekt se ubraja u ljepše bosansko-hercegovačke parkove. Međutim potrebna mu je dodatna revitalizacija. Drveće i grmlje uglavnom ima dobre funkcionalne, estetske i oblikovne karakteristike. Parkovna infrastruktura je u vrlo dobrom stanju.

The main circulatory medium of echinoderms is the coelomic fluid. Biochemistry of coelomic fluid is very complex and slightly different from seawater. The main aim of this research was to analyse concentration of electrolytes (potassium, calcium, magnesium, chlorine and sodium), heavy metals (lead, chromium, cadmium and cobalt) and iron in coelomic fluid of sea urchin, Arbacia lixula as an indirect indicator of seawater contamination. After precise statistical evaluation it was observed that electrolyte concentrations were; Na 189.20±11.41 mmol/l, Cl 134.06±37.08 mmol/l, Mg 4.24±1.08 mmol/l, Ca 3.04±0.84 mmol/l. Biochemical content of heavy metals in coelomic fluid was; Co 1.292±0.879 ppm, Pb 0.644±0.131 ppm, Cr 0.116±0.055 ppm, Cd 0.031±0.017 ppm and iron 0.259±0.058 ppm, and it depends on the potential accumulation level in the organism. The composition of electrolyte and heavy metal content varies depending on the composition of seawater. Obtained values are within the range of values most commonly found in low polluted areas of the Adriatic sea. Similar models may be applied for monitoring of heavy metal contamination in marine environment. Na 189.20±11.41 mmol/l, Cl 134.06±37.08 mmol/l, Mg 4.24±1.08 mmol/l, Ca 3.04±0.84 mmol/l). Biokemijski sadržaj teških metala je iznosio (Co 1.292±0.879 ppm, Pb 0.644±0.131 ppm, Cr 0.116±0.055 ppm, Cd 0.031±0.017 ppm) i željeza 0.259±0.058 ppm, te je ovisio o stupnju akumulacije u Sažetak Glavni cirkulatorni medij bodljokožaca je celomska tekućina. Celomska tekućina ima složen sastav i različita je od sastava morske vode. Glavni cilj ovog istraživanja bio je analiza koncentracije elektrolita (kalija, kalcija, magnezija, klorida i natrija), teških metala (olova, kroma, kadmija i kobalta) i željeza u celomskoj tekućini morskog ježinca Arbacia lixula, kao neizravnih indikatora onečišćenja morske vode. Nakon precizne statističke analize utvrđeno je da su koncentracije elektrolita iznosile ( organizmu. Sastav celomske tekućine u pogledu koncentracije elektrolita i teških metala varira ovisno o sastavu morske vode. Dobiveni rezultati su u razini vrijednosti koje se mogu naći u područjima s niskim stupnjem onečišćenja u Jadranskom moru. Slični modeli mogu se i ubuduće primijeniti u praćenju onečišćenja teških metala u morskom okolišu. KEY WORDS Adriatic seaArbacia lixula ecotoxicology electrolytes heavy metal KLJUČNE RIJEČI Jadransko more Arbacia lixula ekotoksikologija elektroliti teški metal

Thermal changes in water cause many metabolic changes that manifest themselves in physiological fish adaptations. The analysis of hematologic and biochemical blood parameters provides important information on environmental influences on the health status of fish. The hematocrit (HCT) (l/l), hemoglobin concentration (Hb) (g/l), mean corpuscular volume (MCV) (fl), mean corpuscular hemoglobin (MCH) (pg), mean corpuscular hemoglobin concentration (MCHC) (g/l) and red blood cells (RBC) (x1012/L) were analyzed. Animals were grouped into two groups: control (n=10) and experimental (n=16). The experimental fish were exposed to 28°C for 30 min. Puncture of the heart was done and the blood without anticoagulant was analyzed. During hyperthermia, an increase in hematological parameters was observed, except for MCV values that were low. Significant differences were established only for the number of erythrocytes and the hematocrit values (p<0.05). The results showed a decrease in MCV and an increase in the value of other erythrocyte parameters. Significant changes in the number of erythrocyte and hematocrit values were found. Some hematological parameters such as erythrocyte and MCV values are significant stress indicators and can serve us as important factors for physiological adaptations of fish. The carp shows excellent ability to adjust to temperature variations that can be seen through the analysis of hematological status.

B u çalışmada NaOCl çözeltisinin Gökkuşağı balığı Oncorhynchus mykiss (Walbaum, 1792) kanı üzerindeki hematolojik ve biyokimyasal etkileri analiz edildi. Suyun daha önceden klorlanması ile tedavi üç gün sürdü. K + , Ca 2+ , Cl-, proteinler, glikoz konsantrasyonunda önemli farklılıklar tespit edildi ve en büyük varyasyonlar kreatinin konsantrasyonu için bulundu (P <0.05) PCV, Hb konsantrasyonu, RBC, WBC, MCH, MCHC, LYM (%), SEG (%) ve NEU (%) değerleri açısından anlamlı fark bulundu (P <0.05). NaOCl'in küçük dozlarının, asit-baz dengesini değiştirmesinden dolayı gökkuşağı alabalığına çok düşük seviyede adaptasyonu olduğunu gösterdi.

Coefficients of organs, along with haematological characteristics, represent an important means of monitoring the health and condition of fish. Organosomatic indices show the state of organ systems and individual organs. They manifest as changes in size, which are reflected through a decrease or increase, under the influence of environmental factors. Chub individuals from the Suturlija River were used for analysis. The paper analyses the Fulton's condition factor, heart, liver, and spleen coefficients as a condition factor. Furthermore, the values ​​of total length, standard length, and body weight were determined for all individuals. Also, certain haematological parameters were analysed in the paper: total leukocyte count and differential blood count. A total of 19 chubs caught from the Suturlija River were analysed. The obtained result of Fulton's condition factor (1.53) indicates favourable habitats for chub individuals in the Suturlija River. The results of organosomatic indices are without major variations between individuals (CSI = 0.184, SSI = 0.992, HSI = 0.133). The mean leukocyte count was 45.857x109/l, with the highest proportion of lymphocytes in the differential blood count.

Heavy metals belong to a group of substances, which, after reaching a natural habitat, can manifest various negative effects. This paper analyses heavy metals (Cu, Cd, and Pb) in the Una river and fish samples, whereby individuals of grayling (Thymallus thymallus) were used for analysis. The samples were taken at three locations at the Una river: Ripač, Hatinac, and Grmuša. Alongside with the examination of the content of heavy metals, quality of water was tracked, including the following parameters: temperature, pH, electrical conductivity, dissolved oxygen, suspended matter, BPK5, KPK – Cr, total nitrogen – N, total phosphorus P, sulphates, chlorides, nitrites – NO2, nitrates – NO3, fluoride, and heavy metals (Cu, Cd, and Pb). Besides the content of heavy metals, proteins, fats, water, carbohydrates, and mineral matter were found in the grayling fillets. Amount of heavy metals (Pb, Cu, and Cd) were under maximum allowed concentration (MAC).