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The effects of Karenia brevis (Gymnodiniales, Gymnodiniaceae) on the feeding activity of juveniles of four species of bivalve mollusc were examined in the laboratory to assess the potential impacts on these important shellfish populations from Florida. Clearance rates were determined under short-term (one hour) static and long-term (two days) flow-through conditions using both whole and lysed cultures...
The effects of Karenia brevis (Wilson clone) on larval survival and development of the northern quahog, Mercenaria mercenaria, eastern oyster, Crassostrea virginica and bay scallop, Argopecten irradians, were studied in the laboratory. Larvae were exposed to cultures of whole and lysed cells, with mean total brevetoxin concentrations of 53.8 and 68.9μgL −1 , respectively. Survival of early...
Abstract: Comparison of 18S ribosomal RNA gene sequences between diverse bivalve species, including eight scallop species, allowed the design of an 18S rRNA targeted oligonucleotide probe (BS-1364) that was specific for scallops belonging to the genus Argopecten (bay and calico scallops). The high sequence similarity of the 18S rRNA gene between Argopecten irradians and Argopecten gibbus (98.8%) prevented...
Bay scallop, Argopecten irradians concentricus (Say), stocks were collected from a Homosassa (Florida) population in 1991 and were kept in seawater from Bayboro Harbor on Tampa Bay, an urban Florida estuary. They were fed with Isochrysis galbana and Tetraselmis sp. Spawning was allowed to occur after the scallops became ripe. The hatching rate of the F1 eggs to D-shaped larvae was 72%. Settlement...
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