Freshwater Gammarus Species from Europe, North Africa and Adjacent Regions of Asia (Crustacea-Amphipoda).

Karaman, Gordon S.; Pinkster, Sjouk

doi:10.1163/26660644-04701001

Cited by 187 publications

(236 citation statements)

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“…pulex was counted to provide an estimate of population abundance . Animals from the Haseley Brook and Pickering Beck samples were then observed microscopically to confirm identification and to determine the sex of each individual using the criteria described by Karaman & Pinkster (1977) . A Seescan Solitaire Image Analyser was used to measure the area of each animal's lateral aspect .…”

Section: Methodsmentioning

confidence: 99%

“…Gammarus pulex (L.) is a widespread and functionally important stream detritivore found throughout much of Europe and Northern Asia, including the British Isles (Karaman and Pinkster, 1977) . It can play a significant role in processing the leaf material that falls into streams (Willoughby & Sutcliffe, 1976 ;Willoughby & Earnshaw, 1982 ;Welton et al, 1983) and is an important prey item for many fish species (Smyly, 1957 ;Maitland, 1966 ;Welton, 1979).…”

Section: Introductionmentioning

confidence: 99%

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Population characteristics of Gammarus pulex (L.) from five English streams

Crane

1994

Hydrobiologia

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Gammarus pulex were sampled from five English streams during April 1992 . The population density, number of precopula pairs and incidence of parasitic infection were recorded, and the biomass was estimated from subsamples by relating body area to dry weight . Physical and chemical measurements were taken from each stream . The abundance and standing crop biomass differed significantly between streams, probably due to the influence of pollutants or the physical structure of the stream bed . The size of individual G . pulex also differed significantly between streams, although there was no obvious causal explanation for this . Few individuals were visibly parasitised in any of the populations . Males were significantly larger than females, both in precopula pairs and in the general populations . The sex ratio differed between populations and may explain inter-stream differences in the relationship between precopula male and female size .

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Population characteristics of Gammarus pulex (L.) from five English streams

Crane

1994

Hydrobiologia

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“…There are many papers on different taxonomic groups, but only a few of them went into biogeographic comparisons. Among these exceptions we count Dia & Botosaneanu (1983) on Trichoptera; Karaman & Pinkster (1977) on Amphipoda, Gammaridae, and Schutt (1982) on mollusks. Comparative data can be found in Giani et al (1982), Pascar-Gluzman & Dimentman (1984 on Oligochaeta and Moubayed & Laville (1983) on Chironomida.…”

Section: General Conclusionmentioning

confidence: 99%

River Dan, headwater of the Jordan, an aquatic oasis of the Middle East

et al. 1986

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River Dan is the largest of the headwater rivers of the Jordan. The karstic exsurgence of the Dan has a seasonally stable output, a long stretch of strongly turbulent flow, stable temperature around 15.5 °C and high oxygen saturation. A total of 156 taxa, mainly at the species level, were identified from the river. These species are almost exclusively of Palearctic origin. About half of the species are limited to the northernmost part of Israel. The faunal complex described, does not present any longitudinal zonation for the 5 kilometers of turbulent flow; neither does it present seasonal changes in species composition. River Dan is considered to be a post-Pleistocenic river which has an important function of refugium for a wide area of aquatic waterbodies in the area, including the presently drained Lake Hula. It is suggested that in the Illies scheme of stream classification, River Dan might represent a type of stream belonging to a 'pseudorhithral' along with other stenothermic warm water torrents of the tropical-subtropical climatic belt.

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“…A local population of Gammarus laticoxalis laticoxalis Karaman and Pinkster, 1977, living in a perennial high altitude (1 100 m) river with relatively constant annual temperature fluctuation (9 °C-15 °C) was studied throughout 1980-1982 . Observations and results obtained were based on systematic studies of a large number of individuals -11 245 males, 8 010 ovigerous females, 3 087 non ovigerous females and 53 910 juvenils -.…”

Section: Discussionmentioning

confidence: 99%