Results 151 to 160 of about 1,914 (196)
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2010
The White-clawed Crayfish (Austropotamobius pallipes) has been assessed as Endangered under criterion A2ce. In the last ten years this species is suspected to have undergone a decline of somewhere between 50 - 80% based on presence/absence data available for England, France and Italy. The situation in these countries is thought to be similar to that of
L. FÜREDER +5 more
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The White-clawed Crayfish (Austropotamobius pallipes) has been assessed as Endangered under criterion A2ce. In the last ten years this species is suspected to have undergone a decline of somewhere between 50 - 80% based on presence/absence data available for England, France and Italy. The situation in these countries is thought to be similar to that of
L. FÜREDER +5 more
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Evolutionary history of Austropotamobius torrentium
2019Austropotamobius torrentium is a freshwater crayfish species distributed across central and south-eastern Europe, with the highest genetic diversity recorded in the northern-central Dinarides. Previous studies have shown that evolutionary history of A. torrentium was shaped through different paleohydrologic and paleogeologic events from Miocene onwards.
Boštjančić, Ljudevit Luka +5 more
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2015
Branchiobdellidans are ectosymbiotic annelids that are primarily associated with freshwater crayfish. Previous studies of branchiobdellidans in Croatia have been focused mainly on the distribution and diversity of the genus Branchiobdella. The objective of this research was to infer the phylogenetic relationships of the branchiobdellidan species living
Podnar Lešić, Martina +3 more
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Branchiobdellidans are ectosymbiotic annelids that are primarily associated with freshwater crayfish. Previous studies of branchiobdellidans in Croatia have been focused mainly on the distribution and diversity of the genus Branchiobdella. The objective of this research was to infer the phylogenetic relationships of the branchiobdellidan species living
Podnar Lešić, Martina +3 more
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2010
Austropotamobius torrentium is listed under the Annex II of the EU Habitats Directive as a species requiring special conservation measures (Souty-Grosset et al. 2006). It is also listed on the German Red List (RL3, Appendix 1), and within a number of other countries as threatened (Souty-Grosset et al. 2006).
L. FÜREDER +2 more
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Austropotamobius torrentium is listed under the Annex II of the EU Habitats Directive as a species requiring special conservation measures (Souty-Grosset et al. 2006). It is also listed on the German Red List (RL3, Appendix 1), and within a number of other countries as threatened (Souty-Grosset et al. 2006).
L. FÜREDER +2 more
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Xenobiotica, 1985
The acute toxicities of dimethylnitrosamine and diethylnitrosamine have been evaluated in adult male crayfish Austropotamobius pallipes; LD50 values are 2250 mg/kg and 230 mg/kg, respectively. Toxicokinetic studies of 14C-dimethylnitrosamine and 14C-diethylnitrosamine in crayfish, administered by i.v.
R, Alibaud +4 more
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The acute toxicities of dimethylnitrosamine and diethylnitrosamine have been evaluated in adult male crayfish Austropotamobius pallipes; LD50 values are 2250 mg/kg and 230 mg/kg, respectively. Toxicokinetic studies of 14C-dimethylnitrosamine and 14C-diethylnitrosamine in crayfish, administered by i.v.
R, Alibaud +4 more
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Forag ing by a threatened species - the whiteclawed crayfish, Austropotamobius pallipes
Archiv für Hydrobiologie, 2001In analysing the eco-ethological traits of animal populations from the viewpoint of conservation biology, an understanding of the foraging activity of endangered species provides useful clues on habitat requirements and resource utilisation. The present study examined the foraging excursions of 60 specimens of the threatened crayfish, Austropotamobius ...
GHERARDI, FRANCESCA +2 more
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A study of reproductive females of the freshwater crayfish Austropotamobius pallipes
Hydrobiologia, 1985Details of the female annual reproductive cycle in the population from Northumberland are given. Mating occurs in October and is followed by egg laying in early November. Eggs are carried by females until the following July–August when hatching occurs.
J. M. Brewis, K. Bowler
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A Case of Negative Allometry in Austropotamobius Gill Growth
Nature, 1964THE relative filamental surface area of the common British crayfish shows a tendency to decrease with increase in body size1. This seems to contradict the principle of similitude which states that the surface area of an animal is proportional to the square of its linear dimensions, whereas the volume (and the weight, for approximation) is proportional ...
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Metal-binding proteins in the hepatopancreas of the crayfish (Austropotamobius pallipes)
Comparative Biochemistry and Physiology Part C: Comparative Pharmacology, 1983Abstract 1. The hepatopancreas of the crayfish (Austropotamobius pallipes) has been studied in relation to the cellular distribution of Cu, Zn and Cd ions administered in viro or in vitro. 2. Supernatant fractions have been investigated by gel filtration chromatography and three main components have been identified with apparent molecular weights of
R.Lyon.Marina Taylor, K. Simkiss
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Metal ion metabolism in the moulting crayfish (Austropotamobius pallipes)
Comparative Biochemistry and Physiology Part A: Physiology, 1982Abstract 1. 1. The hepatopancreas, antennal gland, gills, gonads. muscle, stomach, carapace, gastroliths and blood of 52 crayfish (Austropotamobius pallipes) have been analysed for copper, zinc, iron, manganese and calcium throughout the moult cycle. 2. 2. There are significant changes in most of these metals at the time of ecdysis. 3. 3.
Elizabeth Adams +2 more
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