Effects of salinity, temperature, and cadmium stress on cadmium-binding protein in the grass shrimp, Palaemonetes pugio
In 96-hour bioassays, shrimp were exposed to zero or one of three levels of cadmium, under one of six different salinity and temperature regimes. CdBP concentrations were quantified in survivors from the 24 exposure groups. Salinity and temperature did not affect survivorship unless the shrimp were also exposed to cadmium. Grass shrimp were most sensitive to cadmium at low salinity-high temperature, and least sensitive at high salinity-low temperature. The incidence of cadmium-associated black lesions in gill tissue was influenced by salinity and temperature stress. P. pugio produced a 10,000 dalton metallothionein-like CdBP when exposed to at least 0.1 mg Cd{sup 2+}/L for 96 hours. Accumulation of CdBP was increased with increases in the exposure cadmium level, increases in temperature and decreases in salinity, independently and in conjunction with one another. Maximum CdBP concentrations occurred in grass shrimp that survived the salinity-temperature-cadmium conditions creating maximum stress as measured by highest mortality, not necessarily in shrimp exposed to the highest cadmium levels. The potential utility of this method as a monitor of physiological stress in estuarine biota inhabiting metal-polluted environments is discussed.
- Research Organization:
- Texas Univ., Houston, TX (USA). School of Public Health
- OSTI ID:
- 7098624
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CADMIUM
TOXICITY
PROTEINS
BIOSYNTHESIS
SHRIMP
BIOLOGICAL STRESS
SALINITY
TEMPERATURE EFFECTS
WATER POLLUTION
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
CRUSTACEANS
DECAPODS
ELEMENTS
INVERTEBRATES
METALS
ORGANIC COMPOUNDS
POLLUTION
SYNTHESIS
560300* - Chemicals Metabolism & Toxicology