Cadmium accumulation in the female shore crab Carcinus maenas during the moult cycle and ovarian maturation

2000 ◽  
Vol 137 (5-6) ◽  
pp. 995-1004 ◽  
Author(s):  
M. Bondgaard ◽  
U. Nørum ◽  
P. Bjerregaard
Keyword(s):  
Carcinus Maenas ◽  
Cadmium Accumulation ◽  
Shore Crab ◽  
Moult Cycle ◽  
Ovarian Maturation

In vivo and in vitro cadmium accumulation during the moult cycle of the male shore crab Carcinus maenas—interaction with calcium metabolism

2005 ◽  
Vol 72 (1-2) ◽  
pp. 29-44 ◽  
Author(s):  
Ulrik Nørum ◽  
Morten Bondgaard ◽  
Thomas V. Pedersen ◽  
Poul Bjerregaard
Keyword(s):  
Calcium Metabolism ◽  
Carcinus Maenas ◽  
Cadmium Accumulation ◽  
Shore Crab ◽  
Moult Cycle

The Effect of Salinity on Cadmium Uptake by the Tissues of the Shore Crab Carcinus Maenas

1977 ◽  
Vol 67 (1) ◽  
pp. 137-146
Author(s):  
D. A. WRIGHT
Keyword(s):  
Sea Water ◽  
Cadmium Concentration ◽  
Carcinus Maenas ◽  
Maximum Level ◽  
Cadmium Accumulation ◽  
Cadmium Uptake ◽  
Whole Body ◽  
Shore Crab ◽  
Salinity Effect ◽  
Wet Weight

Cadmium accumulation by the haemolymph, gills and carapace of the shore crab Carcinus maenas (L.) was significantly higher in dilute sea water. This was reflected in the whole-body cadmium concentrations. There was no salinity effect with the hepatopancreas or muscle cadmium concentration. Over a 68-day period, cadmium was steadily accumulated by the carapace, with the salinity effect becoming increasingly apparent. In 50 % sea water the gill cadmium concentration apparently reached a maximum level after about 2 weeks of uptake. This was eventually overtaken by the tissue cadmium concentration in the gills of 100 % s.w. animals. After about 48 days the salinity effect had disappeared and the gill cadmium concentration of both 50% and 100% s.w. animals (in 20μ-mol Cd l−1 = 2.3 mg l−1) remained at approximately 0.3 μ-mol Cd g−1 (= 33.7 mg kg−1) wet weight of tissue. The hepatopancreas cadmium also levelled off at about this concentration although no salinity effect was apparent. When animals loaded with cadmium for a 37-day period were returned to clean sea water, their whole body cadmium concentration fell by about 50 % after 11 days. Losses from carapace and gills were important components of this reduction in cadmium concentration.

scholarly journals Transcriptomic analysis of crustacean neuropeptide signaling during the moult cycle in the green shore crab, Carcinus maenas

BMC Genomics ◽  
2018 ◽  
Vol 19 (1) ◽  
Author(s):  
Andrew Oliphant ◽  
Jodi L. Alexander ◽  
Martin T. Swain ◽  
Simon G. Webster ◽  
David C. Wilcockson
Keyword(s):  
Carcinus Maenas ◽  
Transcriptomic Analysis ◽  
Shore Crab ◽  
Moult Cycle

IV.—Period of Survival of the Shore-Crab (Carcinus mænas) in Distilled Water

1919 ◽  
Vol 38 ◽  
pp. 14-22
Author(s):  
Robert K. S. Lim
Keyword(s):  
Body Fluid ◽  
Carcinus Maenas ◽  
The Body ◽  
The Other ◽  
Shore Crab ◽  
Moult Cycle ◽  
Distilled Water ◽  
Determining Factors ◽  
Constant Percentage

SUMMARY1. The period of survival in distilled water is shortest with post-moult crabs, longer with pre-moult, and longest with inter-moult.2. Further, a relatively constant percentage of salts is lost, irrespective of size; hence one of the determining factors in survival is the rate of loss of these salts. The other factor is the rate of osmosis of water, causing œdema.3. With regard to the moult cycle, the concentration of the blood and the structure of the membranes are seemingly little altered, but the amount of calcium in the latter varies with moult-age, being least in post-moult and most in inter-moult membranes.4. It is concluded, that the higher the percentage of calcium, the less permeable are the membranes and the longer is the duration of survival.5. Œdema and loss of salts naturally disturb the tonicity equilibrium of the body fluid, and thus cause death.

scholarly journals A pheromone bouquet controls the reproductive behaviour of the male shore crab, Carcinus maenas

2021 ◽  
Author(s):  
Nichola Fletcher ◽  
John A. Terschak ◽  
Helga D. Bartels-Hardege ◽  
Ralf Bublitz ◽  
Paula Schirrmacher ◽  
...  
Keyword(s):  
High Performance ◽  
Sex Pheromones ◽  
Mating Behaviour ◽  
Physiological State ◽  
Carcinus Maenas ◽  
Sympatric Species ◽  
Shore Crab ◽  
Moult Cycle ◽  
Uridine Diphosphate ◽  
Female Urine

AbstractThe reproduction of many brachyuran crustaceans involves the formation of mating pairs often around the time of the female moult with attraction of a sexual partner and mating behaviour controlled by sex pheromones. In shore crabs, Carcinus maenas, females produce sex pheromones that are released in the urine. High Performance Liquid Chromatography analysis (HPLC) of female urine shows that the pheromone, identified as the nucleotide uridine diphosphate (UDP), elutes as an unresolved peak with structurally related nucleotides. We examined female urine samples over the moult cycle and detected UDP as well as uridine triphosphate (UTP). Bioassays were conducted to establish the possibility of a blend of nucleotides forming a sex pheromone bouquet in C. maenas. Whilst UDP induced the male mate guarding behaviour (cradling), a mixture of the two nucleotides at a ratio of 4:1 UDP:UTP elicited an even stronger mating response than either UDP or UTP individually. The urine concentration and composition of these nucleotides changes over the moult period pre and post ecdysis, providing evidence that a pheromone bouquet composition is not always constant. The change of the bouquet is related to the physiological state of the sender, here the moult cycle. Our study unravels the functionality of reaction-specific molecules in a pheromone bouquet. Whilst UDP is the mating signal, UTP acts as an attractant and combined they maximise the reproductive response. The use of bouquets provides species-specificity, potentially enabling reproductive isolation of sympatric species, and contains valuable information on the physiological state of the sender.

Effects of handling during experimental procedures on stress indices in the green shore crab, Carcinus maenas (L)

2021 ◽  
Vol 54 (2) ◽  
pp. 65-85
Author(s):  
Charlotte H. Wilson ◽  
Sarah J. Nancollas ◽  
Molly L. Rivers ◽  
John I. Spicer ◽  
Iain J. McGaw
Keyword(s):  
Carcinus Maenas ◽  
Shore Crab ◽  
Stress Indices

Biochemical responses of the shore crab (Carcinus maenas) in a eutrophic and metal-contaminated coastal system (Óbidos lagoon, Portugal)

2009 ◽  
Vol 72 (5) ◽  
pp. 1471-1480 ◽  
Author(s):  
Patrícia Pereira ◽  
Hilda de Pablo ◽  
Maria Dulce Subida ◽  
Carlos Vale ◽  
Mário Pacheco
Keyword(s):  
Carcinus Maenas ◽  
Shore Crab ◽  
Coastal System ◽  
Biochemical Responses
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