Risk analysis of alien plants recorded in thermal waters of Serbia     

B K Zlatković  S S Bogosavljević 《Weed Research》2020,60(1):85-95

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Eighty-year review of the evolution of landscape ecology: from a spatial planning perspective     

Milovanović  Aleksandra  Milovanović Rodić  Danijela  Maruna  Marija 《Landscape Ecology》2020,35(10):2141-2161

Landscape Ecology - Sustainable spatial development requires the establishment of a balance between rational land use and the protection of nature, ecosystems and biodiversity on various spatial...  相似文献   

Dependence of the common carp (Cyprinus carpio L.) fatty acid profile on diet composition in a semi‐intensive farming system: tissue and time variability          下载免费PDF全文

Trbović Dejana  Živić Ivana  Stanković Marko  Živić Miroslav  Dulić Zorka  Petronijević Radivoj  Marković Zoran 《Aquaculture Research》2017,48(6):3121-3133

Increasing the amount of n‐3 PUFA in carp meat is one of the most important tasks in enhancing its overall quality. However, the relative influence of supplemental feed and natural feed on the FA profile of cultivated carp flesh is not well documented, making it difficult to choose the most efficient strategy. Carp diet composition and diet and flesh fatty acid profiles were simultaneously followed in order to determine the influence of pelleted feed compared to natural feed on fatty acid profiles of carp tissues. Pelleted feed clearly dominated over zooplankton and Chironomidae in the carp diet, producing carp tissue fatty acid profiles closely resembling those of pelleted feed. However, increase in the abundance of zooplankton over the course of the investigation resulting in concomitant increase of its proportion in feed bulk was in strong positive correlation with increase in n‐3 HUFA in the dorsal muscle. n‐3 PUFA enrichment of supplemental feed could be the dominant mechanism in production of carp meat rich in n‐3 PUFA. However, even a small increase in natural feed availability could significantly change the diet of common carp and result in considerable improvement of meat quality with regard to n‐3 HUFA content.  相似文献   

Effects of cage fish farming on phytoplankton community structure,biomass and primary production in an aquaculture area in the middle Adriatic Sea     

Sanda Skejić  Ivona Marasović  Olja Vidjak  Grozdan Kušpilić  Živana Ninčević Gladan  Stefanija Šestanović  Natalija Bojanić 《Aquaculture Research》2011,42(9):1393-1405

In this study, we investigated the physical, chemical and biological parameters of the water column at two stations under different trophic conditions during a 1‐year period (from September 2005 to September 2006) in an aquaculture area. The investigation was performed monthly at a station inside the fish farm in Maslinova Bay (middle Adriatic Sea, Croatia) and at a control station located in the Hvar Channel in the vicinity of the farm. The results showed that the concentrations of dissolved nutrients were slightly enhanced at the farm station in comparison with the control station, although those differences were not statistically significant, nor were the differences in oxygen saturation recorded during the investigation period. As opposed to the chemical parameters, considerably higher deviations were recorded for biological parameters as demonstrated by a significant increase in phytoplankton biomass and primary production (measured in situ) at the farm station, particularly during the summer season. Phytoplankton community structure analysis showed that the phytoplankton composition at the farm was mostly determined by seasonal changes rather than by the influence of fish farming. In Maslinova Bay, no causal links were identified between increased biomass and the appearance of toxic species.  相似文献   

The Effect of Thermal Treatment Method on Fatty Acid Composition in Northern Pike (Esox lucius) Fillets     

Renata Pietrzak-Fiećko  Zdzisław Zakęś  Mirosław Szczepkowski 《Journal Of Aquatic Food Product Technology》2017,26(10):1303-1311

The aim of the present study was to investigate the effect of thermal treatment methods, such as microwave cooking, steaming, and shallow pan-frying on fatty acids composition in northern pike fillets. All methods of thermal treatment increased fat content in the fillets. Microwave cooking decreased the proportion of saturated fatty acids and increased the proportion of total, n-3, and n-6 polyunsaturated fatty acids as compared with fresh fillets. Steam cooking did not affect the proportion of saturated, monounsaturated, and polyunsaturated fatty acids, whereas pan-frying significantly increased the proportion of monounsaturated and n-6 polyunsaturated fatty acids. All cooked fillets, regardless of the thermal treatment used, had acceptable n–6/n–3 ratio; however, microwave cooking enabled fish products to obtain more beneficial n-6/n-3 ratio than frying. Due to high polyunsaturated fatty acids content and low n-6/n-3 ratio, microwave cooking may be recommended for preparing wild pike fillets in households.  相似文献   

Flavonol and phenolic acid composition of sweet cherries (cv. Lapins) produced on six different vegetative rootstocks     

Lidija Jakobek  Marijan &#x;eruga  Sandra Vo&#x;a  Zoran &#x;indrak  Nadica Dobri evi&#x; 《Scientia Horticulturae》2009,123(1):23-28

The effect of rootstock (‘MaxMa 14’, ‘Weiroot 13’, ‘PiKu 1’, ‘Weiroot 158’, ‘Gisela 5’ and ‘F12/1’) on phenolic acid and flavonol content of “Lapins” sweet cherry was investigated. Phenolic acids and flavonols were isolated from sweet cherries and analyzed by using reversed phase high-performance liquid chromatography (RP-HPLC). The major phenolic acids in sweet cherries were neochlorogenic acid (18–50 mg kg⁻¹), chlorogenic acid (19–62 mg kg⁻¹) and p-coumaric acid derivatives (15–125 mg kg⁻¹). The amount of flavonol quercetin-3-rutinoside (8–37 mg kg⁻¹) was significant as well. There are significant variations in the phenolic compound content among sweet cherry fruits grown on trees grafted on different vegetative rootstocks. The significantly higher chlorogenic acid, neochlorogenic acid, p-coumaric derivative and quercetin-3-rutinoside contents were found in sweet cherry fruits grown on trees grafted on ‘Weiroot 13’ and ‘PiKu 1’ rootstocks. Sweet cherries produced on trees grafted on other rootstocks had significantly lower phenolic compound content.  相似文献   

Influence of cytokinins on in vitro morphogenesis in root cultures of Centaurium erythraea—Valuable medicinal plant     

Angelina Subotić  Slađana JevremovićDragoljub Grubišić 《Scientia Horticulturae》2009

The purpose of this work was to acquire more information on the capacity of in vitro grown Centaurium erythraea Gillib. normal and hairy root cultures to simultaneously regenerate adventitious buds and to evaluate the variations induced on regeneration response by treatments with six cytokinins. Explants from normal and hairy root cultures were cultured on half-strength MS medium (1/2 MS) with kinetin (KIN), N⁶-benzylaminopurine (BA), 6-γ,γ-dimethylallylaminopurine (2IP), N-(2-chloro-4-pyridyl)-N′-phenylurea (CPPU), 1-Phenyl-3-(1,2,3-thiadiazol-5-yl)urea (TDZ) and 6-[4-Hydroxy-3-methyl-but-2-enylamino]purine (ZEA), used alone in six different concentrations. The average number of adventitious buds per explant was promoted by all of cytokinin treatments. Urea-type cytokinins, TDZ and CPPU were more effective for the induction the morphogenesis of adventitious buds than adenine-type cytokinins. We found that the 1.0 μM CPPU induced the largest number (25.6, 18.2, respectively) of adventitious buds in normal and hairy root culture. TDZ-supplemented media induced highest number of adventitious buds (24.2) from normal root explant, but from hairy root explant average number of buds is lower (20.5). Regenerated shoots were excised and placed on 1/2 MS medium without hormone. The rooted plantlets were successfully acclimatized in greenhouse conditions.  相似文献   

微藻油脂制备生物基多元醇理化性能分析与结构表征   总被引：2，自引：2，他引：0  

杨晓琴  喻艳华  谢东  Petrovic ZoranS.  洪健  万显美 《农业工程学报》2020,36(7):248-255

为了实现有效高值利用非食用、不占耕地的绿色可再生油脂资源,该研究以微藻油脂为原料,采用环氧化-开环法和氢甲酰化-加氢还原法制备了2种生物基多元醇,通过主要理化指标碘值、酸值、环氧基含量、羟值的测定,重要理论理化指标理论双键含量、理论环氧基含量、理论羟值、转化率和选择性的计算,结合气质联用、凝胶渗透色谱、红外光谱、核磁共振等仪器分析手段,对原料和产物的理化性能和结构进行分析与表征。结果表明,微藻油脂的主要脂肪酸是油酸,质量分数为91.10%,碘值为88.46 g/100 g,理论双键含量0.34 mol/100 g,环氧-开环法得到的多元醇碘值降至0.62 g/100 g,羟值为150.35 mg/g,原料转化率和目标产物选择性分别为99.30%和86.74%,结构中引入仲羟基,通过及时除去环氧反应过程中生成的水、开环反应选择适宜的醇用量可提升产品质量。氢甲酰化-加氢还原法得到的多元醇碘值降至2.12 g/100 g,羟值为166.29 mg/g,原料转化率和目标产物选择性分别为97.60%和95.83%,结构中引入伯羟基,该法为非均相反应,催化剂过滤可除,副反应少,溶剂廉价可回收,产品易分离且质量容易控制。2种方法的原料利用率都很高,目标产物选择性好,产品性能可通过简单易行的理化指标测定和理论计算方法进行有效评价,并可利用仪器分析手段快速监测反应进程、保证产品质量、查找质量问题、拓宽应用范围,具有很好的经济性和工业应用前景,研究结果为油脂为原料的生物基多元醇深入研究和工业应用提供了科学可靠的数据基础和技术支持。  相似文献   

The Growth of Apple Central Fruits as Affected by Thinning with NAA,BA and Naphthenic Acids   总被引：1，自引：0，他引：1  

Biserka Milić  Jelena Tarlanović  Zoran Keserović  Lana Zorić  Bojana Blagojević  Nenad Magazin 《Erwerbs-Obstbau》2017,59(3):185-193

Plant growth regulators such as α?naphthylacetic acid (NAA) or 6?benzyladenine (BA) are commonly used for thinning apple fruits. NAs exhibits an auxin- and gibberellin-type biological activity, stimulate the uptake and translocation of auxins in plant tissue, as well as IAA synthesis and act as surfactants. It was assumed that NAs applied at the stadium of early fruit growth might cause fruit abscission in apple, similarly to NAA. The goal of the research was to test the presumed thinning effect of naphthenic acids on apple cultivars ‘Golden Delicious’ and ‘Red Delicious’. Three treatments were applied on both apple cultivars including 16.5?μL L^?1 NAA, 200?μL L^?1?BA and 2.63?mg L^?1?potassium salts of NAs. Cortical cell size and the number of cell layers were measured in order to determine the contribution of cell size and cell division in early fruit growth, as affected by chemical thinning treatments. The effects of plant growth regulators NAA, BA and NAs on fruit set, fruit size and the anatomy of the fruit cortex highly depend on varietal differences. In ‘Golden Delicious’ fruit set reduction by chemical thinning increases both the number of cell layers and cell size of apple fruit, while in ‘Red Delicious’ NAA inhibits fruit growth, while BA is ineffective. Cell growth promoting activity of NAA and NAs, accompanied by the decrease in fruit set and reduced competition among fruits within the canopy, results in a significant fruit weight increase at harvest. The research confirms the auxinic properties of NAs, and their assumed thinning activity.  相似文献   

Editorial     

Roy A. Stein  John O. Mecom  Božina Ivanović 《Biological conservation》1975,7(1):1-18

Skadar Lake, a large, shallow, subtropical lake on the Albanian frontier in south-western Yugoslavia, supports a commercial fishery which annually yields nearly a thousand metric tons. Examination of catch statistics plus documentation of increasing effort during 1947 through 1973 reveals a declining catch per unit of effort. Water quality has not changed since 1952. However, changes in gear, effort, and exploitation have apparently caused major shifts in species composition and size of the catch. Rapid technological changes in gear coupled with potential environmental degradation may lead to decreased stocks and over-exploitation. Only by instituting a comprehensive management programme, within the context of international cooperation and sound ecological information, can a high sustained yield be maintained and over-exploitation of commercially important fish stocks in Skadar Lake be presented.  相似文献