Sclerochronology and growth of the bivalve mollusks Chione (Chionista) fluctifraga and C. (Chionista) cortezi in the northern Gulf of California, Mexico

Bernd R. Schöne; David H. Goodwin; Karl W. Flessa; David L. Dettman; Peter D. Roopnarine

Sclerochronology and growth of the bivalve mollusks Chione (Chionista) fluctifraga and C. (Chionista) cortezi in the northern Gulf of California, Mexico

Bernd R. Schöne, David H. Goodwin, Karl W. Flessa, David L. Dettman, Peter D. Roopnarine

Geosciences

Research output: Contribution to journal › Article › peer-review

48 Scopus citations

Abstract

Sclerochronology and analysis of oxygen isotopes reveal the age, growth rate, and growth patterns of Chione (Chionista) cortezi and Chione (Chionista) fluctifraga. Chione (C.) cortezi grows more quickly than Chione (C.) fluctifraga, but has a shorter life span (8 years versus 16 years). Microgrowth increments form with tidal periodicity, and their width is mostly influenced by temperature. Microincrement patterns reveal that maximum growth occurs from April to June and again in October. Growth is reduced during the hottest part of the summer and the coldest part of the winter. Growth breaks often occur in December/January and August. Timing of shell growth and environmental conditions were verified by high-resolution oxygen isotope measurements.

Original language	English (US)
Pages (from-to)	45-54
Number of pages	10
Journal	Veliger
Volume	45
Issue number	1
State	Published - 2002

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Aquatic Science
Palaeontology

Cite this

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AU - Schöne, Bernd R.

AU - Goodwin, David H.

AU - Flessa, Karl W.

AU - Dettman, David L.

AU - Roopnarine, Peter D.

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AB - Sclerochronology and analysis of oxygen isotopes reveal the age, growth rate, and growth patterns of Chione (Chionista) cortezi and Chione (Chionista) fluctifraga. Chione (C.) cortezi grows more quickly than Chione (C.) fluctifraga, but has a shorter life span (8 years versus 16 years). Microgrowth increments form with tidal periodicity, and their width is mostly influenced by temperature. Microincrement patterns reveal that maximum growth occurs from April to June and again in October. Growth is reduced during the hottest part of the summer and the coldest part of the winter. Growth breaks often occur in December/January and August. Timing of shell growth and environmental conditions were verified by high-resolution oxygen isotope measurements.

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Sclerochronology and growth of the bivalve mollusks Chione (Chionista) fluctifraga and C. (Chionista) cortezi in the northern Gulf of California, Mexico

Abstract

ASJC Scopus subject areas

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