Population parameters of the trigonal tivela Tivela mactroides (Bivalvia: Veneridae) from Caicara Beach, Anzoátegui, Venezuela
نویسندگان
چکیده
منابع مشابه
Embrionary and larval development of the marine clam Tivela mactroides (Bivalvia: Veneridae) in Zulia State, Venezuela.
The marine clam, Tivela mactroides, from Caño Sagua beach, Venezuela, was spawned and reared under laboratory conditions to monitor its early development. Spawning was spontaneous but in some cases it had to be induced by the additon of eggs and sperm. After fertilization, the embryonic development occurred at 5 hr approximately. Trochophore larvae were observed between eight and ten hours late...
متن کاملFrequency, Magnitude, and Possible Causes of Stranding and Mass-Mortality Events of the Beach Clam Tivela mactroides (Bivalvia: Veneridae)
Stranding combined with mass-mortality events of sandy-beach organisms is a frequent but little-understood phenomenon, which is generally studied based on discrete episodes. The frequency, magnitude, and possible causes of stranding and mass-mortality events of the trigonal clam Tivela mactroides were assessed based on censuses of stranded individuals, every four days from September 2007 throug...
متن کاملAssessment of contamination of the beach clam Tivela mactroides: implications for food safety of a recreational and subsistence marine resource in Caraguatatuba Bay, Brazil
Background: The clam Tivela mactroides is an important sandy-beach resource along the western Atlantic coast, and is widely harvested by both tourists and residents for recreational, subsistence and/or economic purposes. These clams are intensively exploited in Caraguatatuba Bay on the southeastern Brazilian coast. Similarly to most coastal areas around the world, this bay is subject to a varie...
متن کاملWinter Distribution, Density and Size of Mesodesma Mactroides (bivalvia, Mactracea) in Monte Hermoso Beach (argentina)
The yellow clam Mesodesma mactroides (Deshayes, 1854) is a seasonal migrant that moves in spring to the sandy upper intertidal level. In this paper we analyze the spatial distribution of density and mean shell size of the yellow clam population in Monte Hermoso beach (Argentina) in winter 1995, i.e., three months before the mass mortality occurred in November 1995. Sampling covered 32 km of bea...
متن کاملTrace metals in bivalves and seagrass collected from Venezuelan coastal sites
The bivalve mollusks Tivela mactroides and Crassostrea rhizophorae are abundant along the Venezuelan coast and are widely consumed as seafood. The globally important seagrass Thalassia testudinum is also abundant in Venezuelan. We report the concentrations of Cd, Cr, Cu, Ni, V and Zn in the soft parts of Tivela mactroides and Thalassia testudinum, and the concentrations of Cd, Cr, Cu and Ni in ...
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ژورنال
عنوان ژورنال: Ciencias Marinas
سال: 2006
ISSN: 0185-3880,2395-9053
DOI: 10.7773/cm.v32i21.1061