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Showing 1 to 20 of 29 for “"Gammarus"”.
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The physiological ecology of the specialist lagoon amphipod, Gammarus insensibilis
… parasites for the specialist lagoon amphipod, Gammarus insensibilis (Stock). For comparison information is also presented on the reproductive investment of the lagoonal isopod Idotea chelipes (Pallas). <br/><br/>Gilkicker lagoon on the south coast of England, UK, from which the majority of …
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Wirkung von Umweltchemikalien auf Gammarus fossarum - Populationsexperimente und individuenbasiertes Reproduktionsmodell
… vorliegenden Arbeit waren die Untersuchungen mit Gammarus fossarum. In einem akuten Toxizitätstest wurde die LC50 von Terbutryn für adulte und juvenile Gammariden ermittelt. In den Fließrinnenexperimenten mit Terbutryn und Fenoxycarb wurden populationsrelevante Parameter der …
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Der Einfluss von hormonell wirksamen Umweltchemikalien auf die Populationsökologie von Gammarus fossarum
… zur Populationsstruktur und -dynamik von Gammarus fossarum (Amphipoda, Crustacea). Folgende Populationsvariablen wurden erfasst: Abundanz, Geschlechterverhältnis, Anteil von Juvenilen, Anteil brütender Weibchen, Fekundität, Körperlängen und Infektion mit Acanthocephalen. Erstmalig wurde …
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Hypoxia and Ventilation of the Marsupium in the Amphipod, Gammarus Pseudolimnaeus Bousfield
… deliver oxygen and food into the marsupium of Gammarus pseudolimnaeus, a freshwater amphipod common in eastern North America. Dissolved oxygen (DO) in the marsupium measured directly using a micro-oxygen electrode that was inserted between the oostegites. DO in the marsupium of gravid females, …
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Genetic structure and colonisation history of European and UK population of Gammarus pulex
… morphological variation.Molecular analysis of Gammarus pulex in Europe revealed more diversity than previously thought. This was thought to be a consequence of two separate waves of colonisation after the formation of the major drainages in the Miocene. The UK appears to have been colonised …
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Hypoxia-Limited Survival, Respiration, and Mate-Guarding Behavior in the Amphipod Gammarus Pseudolimnaeus Bousfield
… mate-guarding behavior of the amphipod, Gammarus pseudolimnaeus, were tested to determine if seasonal hypoxia in Lake Taneycomo could be a limiting factor for amphipods in the lake. Currently, the Army Corps of Engineers uses oxygenation procedures at Table Rock Dam to defend 4.0 ppm …
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Palladium uptake and its effect on behavioural and molecular markers in the freshwater shrimp Gammarus pulex
… explore the response of the freshwater amphipod Gammarus pulex to PGEs. Investigations included the 96 LC50 test and several behavioural (vertical movement and feeding activity) and biochemical (acetylcholinesterase (AChE); osmoregulation; 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium …
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Comparisons of Secondary Production, Life History, and Mouthpart Functional Morphology Between Two Populations of the Amphipod Gammarus minus
… activity of two populations of the amphipod Gammarus minus were compared. The two populations occupied different habitats, and I attempted to determine whether differences observed between the two populations were related to habitat. Annual production and life history of the populations were …
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The effect of the sheep dip pesticide diazinon on behavioural and molecular markers in the freshwater shrimp Gammarus pulex
… formulation on the freshwater amphipod Gammarus pulex. It was found that diazinon in the commercial formulation was significantly more toxic to G. pulex than diazinon oxon, which in turn was significantly more toxic than diazinon.
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Effects of hypersalinity on the behaviour, physiology and survival of commercially important North Sea crustaceans
… species, the European lobster, Homarus gammarus (L), and two crab species, the brown crab, Cancer pagurus (L) and the velvet crab, Necora puber (L).All three species feature prominently in the East Yorkshire fisheries, and are found typically in full salinity seawater environments that …
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The life cycle of the parasite Pomphorhynchus tereticollis in reference to 0+ cyprinids and the intermediate host Gammarus spp in the UK.
… species has an indirect life cycle which uses a Gammarus spp as an intermediate host and cyprinids and salmonids as final hosts although the main hosts are Squalis cephalus (S. cephalus) and Barbus barbus (B. barbus). Research on P. tereticollis has primarily focused on mature fish while there is …
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The Food Habits of the Amphipod Gammarus Pseudolimnaeus (Holsinger) in the Upper Region of Lake Taneycomo as Related to the Benthic Diatom (Bacillariophyceae) Microflora
… diatoms in the gut may indicate a preferred Gammarus feeding area. Relative water quality of the study sites was measured by use of two different diversity indices. Water quality of the selected sites was found to fall within the range suggestive of moderate to severe pollution. Significant …
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Studies on the biology of Cyathocephalus truncatus (Pallas, 1781) (Cestoda : Spathebothridea) in its fish and crustacean hosts
… of C.truncatus in the amphipod crustacean Gammarus pulex in the same habitat. Other helminth parasites recorded in both fish and gammarid hosts include Echinorhynchus truttae, Echinorhynchus salmonis, Neoechinorhynchus rutili, Cystidicola farionis, Cucullanus truttae and Crepidostomilm …
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ΛΕΠΤΗ ΔΟΜΗ ΤΟΥ ΒΛΕΦΑΡΙΔΟΦΟΡΟΥ SPIROCHONA GEMMIPARA
… ΚΑΘΩΣ ΚΑΙ Η ΕΠΙΦΑΝΕΙΑ ΤΩΝ ΒΡΑΓΧΙΩΝ ΤΟΥ GAMMARUS PULEX, ΟΠΟΥ ΖΟΥΝ ΤΑ ΠΡΩΤΟΖΩΑ. ΜΕ ΤΟ ΗΛΕΚΤΡΟΝΙΚΟ ΜΙΚΡΟΣΚΟΠΙΟ ΔΙΕΛΕΥΣΕΩΣ (ΤΕΜ)ΜΕΛΕΤΗΘΗΚΕ ΛΕΠΤΟΜΕΡΩΣ Η ΛΕΠΤΗ ΔΟΜΗ ΤΗΣ SPIROCHONA GEMMIPARA. ΒΡΕΘΗΚΕ ΟΤΙ ΠΕΡΙΕΧΕΙ ΕΝΑ ΜΑΚΡΟΠΥΡΗΝΑ, ΤΡΕΙΣ ΜΙΚΡΟΠΥΡΗΝΕΣ, ΕΝΑ ΣΦΥΓΜΩΔΕΣ ΚΕΝΟΤΟΠΙΟ, ΚΥΤΤΑΡΟΣΤΟΜΑ, …
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Organic Matter Dynamics and Trophic Structure in Karst Groundwater
… microbial films on wood in either stream type. Gammarus minus is an important shredder in Organ Cave streams and G. minus colonization accelerated leaf breakdown rates. Leaf and wood transport rates were low and, when combined with breakdown rates, suggest that CPOM will be retained and …
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Einfluss der Aufnahmewege auf die Toxikokinetik von Terbutryn und Benzo[a]pyren bei drei benthischen Invertebraten
… Benzo[a]pyren bei den aquatischen Invertebraten Gammarus fossarum, Asellus aquaticus und Lumbriculus variegatus haben. Es wurden die toxikokinetischen Parameter zur Aufnahme und Elimination von 14C-Terbutryn und 14C-Benzo[a]pyren in Biokonzentrations- und Biomagnifikationsexperimenten untersucht. …
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Invasive species: fundamental and applied science
… the impacts of the emerging amphipod IAS, Pontogammarus maeoticus, relative to an established IAS, Gammarus tigrinus, and a trophically analogous native, Gammarus salinus, in the Baltic Sea. I show that this often-overlooked aspect of climate change enhanced the relative impacts of both IAS. In …
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Studies on Holkham salts hole : an isolated salt water community with relict features
… for three crustacean species, Idotea chelipes, Gammarus duebeni and Praunus flexuosus. These describe how changes in salinity, temperature and oxygen concentration influence survival of both adults and juveniles. Populations drawn from the surrounding marshes of Holkham Bay have been compared to …
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The Study of Benthic Invertebrate Communities in: -(a) Lotic Eutrophic Waters (b) A River in Stages of Recovery from Past Pollution
… reactions of the pollution sensitive amphipod Gammarus pulex was investigated. The importance of the chironomid larvae in benthic communities has been emphasised throughout, and preliminary investigations into their respiratory rates at differing oxygen concentrations have been made using a …
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