Gammarus pulex
Calcium Regulation in Intermoult Gammarus Pulex
... The relationship between transepithelial potential difference in intermoult Gammarus pulex and the external calcium activity and concentration.. Vertical lines represent standard errors [r] ...
14
Effect of multiple microsporidian infections and temperature stress on the heat shock protein 70 (hsp70) response of the amphipod Gammarus pulex
... of Gammarus pulex from the river Ruhr, Germany, naturally infected with ...G. pulex is a common and widely distributed freshwater amphipod, common in European streams and lakes where it is an ...
9
Variability in feeding of Gammarus pulex: moving towards a more standardised feeding assay
... Several natural factors are known to influence the feeding rate of organisms, such as food source, food quality, body size, temperature, reproductive status, parasite infection and water quality. For gammarids, many of ...
9
Assessing the reliability of uptake and elimination kinetics modelling approaches for estimating bioconcentration factors in the freshwater invertebrate, Gammarus pulex
... This study considers whether the current standard toxicokinetic methods are an accurate and applicable assess- ment of xenobiotic exposure in an aquatic freshwater invertebrate. An in vivo exposure examined the uptake ...
9
From population level effects to individual response: modelling temperature dependence in Gammarus pulex
... amphipod Gammarus pulex (Linnaeus 1758), which is one of the main shredders in running waters of temperate regions and, therefore, crucial for energy turnover in these ecosystems (Boyero et ...G. ...
10
The Toxicity of Dissolved Metallic Salts to Polycelis Nigra (Muller) And Gammarus Pulex (L )
... The behaviour of Polycelis nigra in aqueous solutions of metallic salts is described, survival curves for this animal in some variety of salts are given, and the mode of toxic action of [r] ...
13
Influence of host nutritional condition on post infection traits in the association between the manipulative acanthocephalan Pomphorhynchus laevis and the amphipod Gammarus pulex
... G. pulex collected in the wild to address the influence of host nutritional condition on the intensity of manipulation and classical infection parameters such as prevalence and ...
12
The Effect of Ionic Copper on the Oxygen Consumption of Gammarus Pulex and Polycelis Nigra
... The pH of the most acid of the copper solutions used in the experiments with Polycelis was 5-6, and thus the hydrogen ions set free by hydrolysis do not appear to be responsible for the [r] ...
9
Copper and zinc detoxification in Gammarus pulex (L )
... Sulphur concentrations in the MTLP and MRG+exo fraction correlated with increases in Cu concentration. In Orchestiagammarellus (another amphipod), sulphur and phosphorus in granules correlated with Cu and Zn ...
11
Sodium Regulation in the Fresh Water Amphipod, Gammarus Pulex (L )
... This reduction in urine sodium, combined with a fall in the blood sodium level, is sufficient to account for all of the observed reductions in the total sodium loss rate which occur when[r] ...
20
Aquatic macroinvertebrate responses to native and non-native predators
... macroinvertebrates, Gammarus pulex and Potamopyr- gus jenkinsi, to olfactory cues from three predators; sympatric native fish (Gasterosteus aculeatus), sympatric native crayfish (Austropotamobius pallipes), ...
12
Modelling survival : exposure pattern, species sensitivity and uncertainty
... We investigate calibration and forecasting of survival with GUTS in three case studies. In the irst study, we discuss parameter identiication for GUTS proper with respect to experimental design. To identify the data ...
12
Larval size in acanthocephalan parasites: Influence of intraspecific competition and effects on intermediate host behavioural changes
... Methods: We used experimental infections of Gammarus pulex by Pomphorhynchus laevis Acanthocephala, to investigate larval size effects on host behavioural manipulation among different pa[r] ...
7
The Effect of Calcium on Sodium Influx and Loss in Gammarus (Amphipoda)
... duebeni sodium influx from sodium chloride solutions and sodium loss into de-ionized water were not affected in a consistent manner by the presence of calcium ions at concentrations up t[r] ...
12
The Composition and Downward Vertical Transport of Particulate Phosphorus in the Cariaco Basin, Venezuela
... Database searching, sequence retrieval and annotation of active SPs and SP homologs We began our search with TRY4B, a serine protease previously identified in the Daphnia genome that is known to be expressed (Schwerin et ...
97
AMYLASE VARIATION IN THE SALT MARSH AMPHIPOD, GAMMARUS PALUSTRIS
... SPIES (1 9’77) listed five possible causes of heterozygote deficiency in natural populations: (1) selection against heterozygotes, (2) undetected null alleles, (3) positive a[r] ...
13
The Reactions of Normal and Mutant Types of Gammarus Chevreuxi to Light
... Finally, whereas in normal animals treated with acetic acid the percentages in the light and dark ends were 38-4 and 16-6 per cent, respectively, when red-eyed animals were used the perc[r] ...
14
The Respiratory Rate of Gammarus chevreuxi in Relation to Differences in Salinity
... Using unanaesthetised animals, the rate of respiration was measured at intervals between 1 hour and 12 days after the animals had been transferred directly from 25 into 100 per cent, sea[r] ...
5
Speciation with gene flow in the Daphnia pulex species complex
... During optimal conditions, cyclically parthenogenetic (CP) females produce diploid eggs by apomixis which develop into genetically identical daughters. Certain environmental cues, such as warm temperatures and crowding ...
104
The physiological ecology of the specialist lagoon amphipod, Gammarus insensibilis
... Coastal lagoons are habitats of conservation importance. The characteristic fauna of lagoons includes a number of specialist species, some of which are scheduled for protection. Work on the conservation of coastal ...
232