A New C22-Steroid in the Clam, Tapes philippinarum

Molecular evolution and recombination in gender-associated mitochondrial DNAs of the Manila clam Tapes philippinarum.

Doubly uniparental inheritance (DUI) provides an intriguing system for addressing aspects of molecular evolution and intermolecular recombination of mitochondrial DNA. For this reason, a large sequence analysis has been performed on Tapes philippinarum (Bivalvia, Veneridae), which has mitochondrial DNA heteroplasmy that is consistent with a DUI. The sequences of a 9.2-kb region (containing 29 g...

4-Nonylphenol induces immunomodulation and apoptotic events in the clam Tapes philippinarum

The effects of 4-nonylphenol (NP) on functional responses of haemocytes from the clam Tapes philippinarum were investigated after 7 d exposure to sublethal NP concentrations (0, 0 + acetone, 0.025, 0.05, 0.1 and 0.2 mg l–1 NP). Haemocytes from both controls and exposed clams were collected, and the effects of NP on uptake of the vital dye Neutral Red (NR), superoxide dismutase (SOD) and lysozym...

Isolation and characterization of a pathogenic bacterium specific to Manila clam Tapes philippinarum larvae

A bactenal straln belonging to the genus Vibno was involved in a recurrent outbreak of disease In Manila clam Tapes phdipplnaruni larvae at a commercial hatchery. This vibrio, named VTP for convenience, was not related to the known pathogenic vibrios and possessed unusual characteristics. Only Manila clam larvae and postlarvae were affected by the disease. Oyster and scallop larvae were not aff...

Density and temperature-dependence of vital rates in the Manila clam Tapes philippinarum: a stochastic demographic model

We developed a demographic and management model for the Manila clam Tapes philippinarum (one of the most important commercial mollusc species in Europe) from data collected in the Sacca di Goro lagoon, Italy. Herein, we describe growth and survival processes by 2 submodels incorporating temperature-driven fluctuations in vital parameters, density-dependent effects on survival, and sediment type...

Manila Clam (Tapes philippinarum Adams & Reeve, 1852) in the Lagoon of Marano and Grado (Northern Adriatic Sea, Italy): Socio-Economic and Environmental Pathway of a Shell Farm