scholarly journals Pomphorhynchus laevis manipulates Gammarus pulex behaviour despite salt pollution

2020 ◽  
Vol 65 (10) ◽  
pp. 1718-1725
Author(s):  
Hadrien Fanton ◽  
Evelyne Franquet ◽  
Maxime Logez ◽  
Nicolas Kaldonski
Keyword(s):  
Gammarus Pulex ◽  
Pomphorhynchus Laevis

The effect of the acanthocephalan Pomphorhynchus laevis upon the respiration of its intermediate host, Gammarus pulex

Parasitology ◽  
1974 ◽  
Vol 68 (2) ◽  
pp. 271-284 ◽  
Author(s):  
A. E. Rumpus ◽  
C. R. Kennedy
Keyword(s):  
Oxygen Consumption ◽  
Oxygen Uptake ◽  
Host Population ◽  
Gammarus Pulex ◽  
Multiple Infections ◽  
Pomphorhynchus Laevis ◽  
Respiration Rates ◽  
Physiological Processes ◽  
Stage Of Development ◽  
Host Parasite

The respiration rates of individual Gammarus pulex infected by larval Pomphorhynchus laevis were investigated with particular reference to the stage of development of the host and parasite and to the water temperature. At 20°C the oxygen consumption of Gammarus of all sizes was reduced by an average of 19·3 % by the presence of cystacanths of the parasite, but was unaffected by the presence of acanthellae. It is considered that the small size of this larval stage, in relation to that of its host, is responsible for the failure to detect an effect. Multiple infections did not exert any greater effect upon host respiration than single cystacanths, nor did it appear that the parasite had different effects upon hosts of different sexes. At 10°C no significant differences were observed between the respiration rates of infected and uninfected gammarids. The parasite was probably still depressing the host respiration rate at this temperature, but the oxygen uptake of G. pulex is so low that the differences between infected and uninfected individuals were too small to be detected. The parasite has a direct effect upon the physiological processes of the host, but neither the mechanism of this nor the reasons for the different effects found in different host-parasite systems are yet understood. Despite the pronounced effect of P. laevis on respiration of individual hosts, its effect upon the oxygen consumption of a natural host population is small since only a small proportion of the population carries infections and water temperatures remain below 10°C for over half the year.

Carbohydrate titres in the haemolymph and midgut glands of Gammarus pulex infected with the acanthocephalan Pomphorhynchus laevis

1996 ◽  
Vol 70 (2) ◽  
pp. 103-107 ◽  
Author(s):  
C.R. Bentley ◽  
H. Hurd
Keyword(s):  
Linear Relationship ◽  
Intermediate Host ◽  
Gammarus Pulex ◽  
Midgut Gland ◽  
Pomphorhynchus Laevis ◽  
Chow Test ◽  
Wet Weight ◽  
The Relationship

AbstractAn examination of the effects of Pomphorhynchus laevis cystacanths on the haemolymph and midgut gland carbohydrate titres of its intermediate host, Gammarus pulex (Crustacea) was undertaken. In the haemolymph, infection with cystacanths did not alter the relationship between haemolymph carbohydrate titres and body wet weight. However, in the midgut glands, infection did alter the relationship between gammarid wet weight and titres of glucose and trehalose (P<0.05, Chow test). The linear relationship between gammarid size and midgut glycogen titre was also significantly altered by infection. Thus circulating carbohydrate titres are unaltered in infected gammarids but storage ones are. The changes in carbohydrate titres and the relationship between individual titres and body wet weight are discussed, especially regarding parasite index.

scholarly journals High food quality increases infection of Gammarus pulex (Crustacea: Amphipoda) by the acanthocephalan parasite Pomphorhynchus laevis

2019 ◽  
Vol 49 (10) ◽  
pp. 805-817
Author(s):  
Kevin Sanchez-Thirion ◽  
Michael Danger ◽  
Alexandre Bec ◽  
Elise Billoir ◽  
Sophie Labaude ◽  
...  
Keyword(s):  
Food Quality ◽  
Gammarus Pulex ◽  
High Food ◽  
Pomphorhynchus Laevis ◽  
Acanthocephalan Parasite
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