Many crustaceans detect odors from distant sources (such as conspecifics or prey items) by using chemosensory sensillae (aesthetascs) on their antennules. The morphology and arrangement of the aesthetascs on the antennule and the movement of the antennule through the surrounding fluid during olfactory sampling affect the flow of odorants around the sensillae and thus odorant access to receptors...

A series of statistical analyses were used to identify temporal and spatial patterns in the phytoplankton and nutrient dynamics of Lake Washington, an mesotrophic lake in Washington State (USA). These analyses were based on fortnightly or monthly samples of water temperature, Secchi transparency, ammonium (NH(4)), nitrate (NO(3)), inorganic phosphorus (IP), total nitrogen (TN), total phosphorus...

Herbicides, Photosynthesis, Highand Low-Affinity Binding, Thylakoids, Algae Highand low-affinity binding o f photosystem II herbicides to isolated thylakoids of Spinacia oleracea and to intact cells o f the unicellular green alga Ankistrodesmus braunii were investigated. Complete mutual displacement o f bound diuron-type herbicides (e.g. diuron, atrazine, terbutryn) by either diuronor phenol-ty...

Recreational fishing is a pillar of the multibillion-dollar tourism sector in Caribbean, supporting economic development and community livelihoods. However, as climate change drives increased habitat degradation, key recreational target species may experience declines. To effectively prioritize adaptation mitigation efforts it critical to project impacts on communities that depend them. We cond...

为了解不同农业施肥管理方式对水体浮游植物群落的影响，本研究以江苏句容戴庄有机示范村和常规农业管理区池塘浮游植物为对象，分析冬夏两季浮游植物群落特征及相关水环境因子.结果表明：冬季有机和常规农业区域的浮游植物分别检到7门95种和7门111种，夏季分别检到7门102种和6门112种，有机农业区浮游植物由冬季的隐藻-绿藻型向夏季的蓝藻-绿藻型变化，常规农业区从隐藻-绿藻型向蓝藻-硅藻型变化，蓝藻逐渐取代隐藻的优势地位.夏季各池塘浮游植物alpha多样性没有显著的区域差异，但冬季常规农业区浮游植物物种丰富度、蓝藻和裸藻的Shannon-Wiener多样性指数显著较高.指示物种分析显示，谷皮菱形藻（Nitzschia palea）和梅尼小环藻（Cyclotella meneghiniana）为有机农业区指示物种，而梭形裸藻（Euglena acus）、针形纤维藻（Ankistrodesmus ...

Present study investigated the possible role of P-glycoprotein in intracellular exposure of active substance (robinin) natural medicine Flaroninum™ and effect robinin on cellular accumulation mitoxantrone either BCRP-overexpressing BCRP-negative cells. Robinin - kaempferol-3-O-b-D-robinoside-7-O-α-L-rhamnopyranoside, has been obtained from over ground parts Astragalus falcatus Lam., growin...

ETHNOPHARMACOLOGICAL RELEVANCE Four species of Podocarpus are used in traditional medicine both in human and animal healthcare in South Africa. In vitro pharmacological screening of leaf and stem extracts of these species exhibited potent antimicrobial, anti-inflammatory, anti-tyrosinase, anthelmintic, acetylcholinesterase inhibitory and antioxidant activities. AIM OF THE STUDY To investigate...

The prevalence of fish-borne zoonotic trematode (FZT) metacercariae was investigated in fish farmed by rural households in Nghe An Province, located in northern Vietnam. In total, 716 fish, including tilapia (Oreochromis niloticus) and 6 carp species, i.e., grass carp (Ctenopharyngodon idellus), bighead carp (Aristichthys nobilis), mrigal (Cirrhinus mrigala), common carp (Cyprinus carpio), silv...

The life history of many marine fishes is a 2-phase cycle: juveniles and adults make up a demersal phase, whereas larvae are planktonic. Determining ontogenetic patterns of habitat type use of the demersal phase has important management and habitat conservation implications for species that use coastal habitat types as juveniles. Juvenile permit, Trachinotus falcatus, are presumed to be limited...

Stool samples from a total of 1,008 persons were examined for intestinal parasites during a comprehensive study on the epidemiology of small fluke infections in Laos. The prevalence of small fluke eggs in the stool was seen to peak at age 20 years, particularly in men from villages (90.4%). Three quarters of infections belong to the category of light infections and only 0.6% to the category of ...