EFFECT OF LOW SALINITY ON CADMIUM ACCUMULATION AND CALCIUM HOMEOSTASIS IN THE SHORE CRAB (CARCINUS MAENAS) AT FIXED FREE Cd2+ CONCENTRATIONS

2003 ◽  
Vol 22 (11) ◽  
pp. 2761 ◽  
Author(s):  
Jonathan Burke ◽  
Richard D. Handy ◽  
Stephen. D. Roast
Keyword(s):  
Calcium Homeostasis ◽  
Carcinus Maenas ◽  
Cadmium Accumulation ◽  
Shore Crab ◽  
Low Salinity

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 Predation risk increases in estuarine bivalves stressed by low salinity

2021 ◽  
Vol 168 (8) ◽  
Author(s):  
Rula Domínguez ◽  
Elsa Vázquez ◽  
Isabel M. Smallegange ◽  
Sarah A. Woodin ◽  
David S. Wethey ◽  
...  
Keyword(s):  
Predation Risk ◽  
Native Species ◽  
Prey Species ◽  
Carcinus Maenas ◽  
Handling Time ◽  
Ruditapes Philippinarum ◽  
Shore Crab ◽  
Indigenous Species ◽  
Predatory Behaviour ◽  
Low Salinity

AbstractSalinity drops in estuaries after heavy rains are expected to increase in frequency and intensity over the next decades, with physiological and ecological consequences for the inhabitant organisms. It was investigated whether low salinity stress increases predation risk on three relevant commercial bivalves in Europe. In laboratory, juveniles of Venerupis corrugata, Cerastoderma edule, and the introduced Ruditapes philippinarum were subjected to low salinities (5, 10 and control 35) during two consecutive days and, afterwards, exposed to one of two common predators in the shellfish beds: the shore crab Carcinus maenas and the gastropod Bolinus brandaris, a non-indigenous species present in some Galician shellfish beds. Two types of choice experiment were done: one offering each predator one prey species previously exposed to one of the three salinities, and the other offering each predator the three prey species at the same time, previously exposed to one of the three salinities. Consumption of both predators and predatory behaviour of C. maenas (handling time, rejections, consumption rate) were measured. Predation rates and foraging behaviour differed, with B. brandaris being more generalist than C. maenas. Still, both predators consumed significantly more stressed (salinity 5 and 10) than non-stressed prey. The overall consumption of the native species C. edule and V. corrugata was greater than that of R. philippinarum, likely due to their vulnerability to low salinity and physical traits (e.g., thinner shell, valve gape). Increasing precipitations can alter salinity gradients in shellfish beds, and thus affect the population dynamics of harvested bivalves via predator–prey interactions.

scholarly journals Maternal and cohort effects modulate offspring responses to multiple stressors

2020 ◽  
Vol 287 (1929) ◽  
pp. 20200492
Author(s):  
Gabriela Torres ◽  
David N. Thomas ◽  
Nia M. Whiteley ◽  
David Wilcockson ◽  
Luis Giménez
Keyword(s):  
Multiple Stressors ◽  
Marine Invertebrate ◽  
Carcinus Maenas ◽  
Shore Crab ◽  
Negative Effects ◽  
Maternal Environment ◽  
Offspring Performance ◽  
Low Salinity ◽  
Different Seasons ◽  
Current Concerns

Current concerns about climate change have led to intensive research attempting to understand how climate-driven stressors affect the performance of organisms, in particular the offspring of many invertebrates and fishes. Although stressors are likely to act on several stages of the life cycle, little is known about their action across life phases, for instance how multiple stressors experienced simultaneously in the maternal environment can modulate the responses to the same stressors operating in the offspring environment. Here, we study how performance of offspring of a marine invertebrate (shore crab Carcinus maenas ) changes in response to two stressors (temperature and salinity) experienced during embryogenesis in brooding mothers from different seasons. On average, offspring responses were antagonistic: high temperature mitigated the negative effects of low salinity on survival. However, the magnitude of the response was modulated by the temperature and salinity conditions experienced by egg-carrying mothers. Performance also varied among cohorts, perhaps reflecting genetic variation, and/or maternal conditions prior to embryogenesis. This study contributes towards the understanding of how anthropogenic modification of the maternal environment drives offspring performance in brooders.

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

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

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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