Becerra-Buencho, Raul M. (1984) The effect of organotin and copper sulfate on the late development and presettlement behavior of the hard clam Mercenaria mercenaria. Masters Thesis, University of Maryland , 83pp.
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The effect of organotin compounds and copper, commonly used as antifouling agent, were studied on Mercenaria mercernaria larvae. They were reared under usual hatchery conditions until they reached 190 um in diameter. The larvae were subjected to four compounds, tributylin chloride (TBT), monobutyltin chloride (MBT), trimethyltin chloride (TMT), cupric sulfate (CuSo4) plus control. Mortality was measured at 24, 48 h, and 96h. Behavioral and/or metamorphic changes were recorded in triplicate at 24-48 and 96 h. The appearance in swimming larvae of a functional foot was considered a sign of competence to set and was recorded as a "pediveliger". Swimming larvae were considered as larvae that have not yet reached their total development and they were recorded as "swimming". Larvae that did not show foot or swimming activity and were static but alive on the bottom were recorded as "bottom". TBT was found to completely inhibit swimming activity at sublethal concentrations throughout the period of observation. Copper and MBT inhibited swimming from 48 h, TMT did not inhibit swimming activity at any of the times recorded. The four compounds ranked in order of decreasing toxicity were TBT>TMT>CU>MBT.
|Title:||The effect of organotin and copper sulfate on the late development and presettlement behavior of the hard clam Mercenaria mercenaria|
|Number of Pages:||83|
|Date:||27 August 1984|
|Department:||Marine Estuarine and Environmental Studies|
|Funders:||Universidad Catolica de Chile, Sede Regional Talcahuano, University of Maryland , Latin American Scholarship for American Universities|
|Institution:||University of Maryland|
|Uncontrolled Keywords:||organotin compounds, field studies, Baltimore Harbor, effects, Gastropoda, shell malformations, Bivalve larvae, Wachapreague, Virginia, spawning, fertilization, water quality|
|Depositing User:||Kathleen Heil|
|Date Deposited:||16 May 2012 23:56|
|Last Modified:||28 Apr 2015 21:10|
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