Respiratory and circulatory responses of the blue crab to naphthalene and the effect of acclimation salinity

Adult intermolt blue crabs (Callinectes sapidus Rathbun) were stepwise acclimated to salinity at 22-25 degree C. Responses were monitored during 24-h exposure to water-soluble naphthalene at 0, 37.5 and 75% of the 24-h TL sub(m) in a flow-through system at 10 and 30 ppt. S. No salinity related diffe...

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Bibliographic Details
Published in:Aquatic toxicology 1983-01, Vol.2 (1), p.301-318
Main Author: Sabourin, T D
Format: Article
Language:English
Subjects:
Callinectes sapidus
Marine
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Summary:Adult intermolt blue crabs (Callinectes sapidus Rathbun) were stepwise acclimated to salinity at 22-25 degree C. Responses were monitored during 24-h exposure to water-soluble naphthalene at 0, 37.5 and 75% of the 24-h TL sub(m) in a flow-through system at 10 and 30 ppt. S. No salinity related difference existed in the resistance of crabs to naphthalene. The pooled salinity 24-h and 48-h TL sub(m) values were 2.4 and 2.3 mg/l, respectively. Naphthalene appears to exert sublethal effects on gill epithelia by disrupting ion exchange. Ramifications observed were osmotic and related to acid-base imbalance. Oxygen transport is directly affected by such changes. Compensation is a complex process and occurs via increased ventilation and blood flow. Temporal change in oxygen delivery is consistent with previous reports of the time required to reach an equilibrium between hydrocarbon uptake and excretion.
ISSN:0166-445X