Embryonic and larval development of Pinctada margaritifera (Linnaeus, 1758)

Saveh Doroudi, Mehdi S., and Southgate, Paul C. (2003) Embryonic and larval development of Pinctada margaritifera (Linnaeus, 1758). Molluscan Research, 23 (2). pp. 101-107.

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We describe the developmental stages of the black-lip pearl oyster, Pinctada margaritifera (Linnaeus, 1758), larvae from fertilisation through embryonic development and larval growth in the laboratory at 28 ± 1°C. Larvae were anesthetised, fixed, critical-point dried and examined using a scanning electron microscope. We examined embryonic development (fertilisation, polar body, blastomeres, gastrula) and attributes of the larval shell (size, prodissoconch I/II, growth lines, provinculum, shell fracture) and larval velum. The first polar body formed 24 min after fertilisation and fertilised eggs had a mean diameter of 59.9 ± 1.4 μm. The earliest actively swimming trochophore appeared 8–12 h after fertilisation. The D stage was reached approximately 24 h after fertilisation and measured 79.7 ± 2.3 μm in shell length. Ten-day-old larvae had umbones that arose opposite each other above the hinge axis and 22-day-old larvae, with a mean shell length of 230.8 ± 4.9 μm, developed a pigment spot just before entering the pediveliger stage.

Item ID: 6931
Item Type: Article (Research - C1)
ISSN: 1323-5818
Keywords: hinge; morphology; pearl oyster; scanning electron microscope
Date Deposited: 23 Feb 2010 04:33
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830199 Fisheries - Aquaculture not elsewhere classified @ 100%
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