How are clams born?

Answer 1

I'm not a fan of cutting and pasting but I found some info for you..

"Spawning occurs when males and females release gametes into the water column during the summer months, as water temperatures reach approximately 22 to 24 degrees Celsius (Chesapeake Bay Program 1987). Eggs are buoyant and have a diameter of 0.07 millimeters plus an outer envelope 0.03 to 0.1 millimeters thick. Fertilization occurs in the water column followed by development into planktonic larvae. The larvae pass through various developmental stages, marked by the formation of shell valves, umbo, and ciliated foot. After approximately four weeks of development, settlement occurs with the larvae attaching to sand grains and taking up a benthic lifestyle. During this stage, the siphons develop, the mantle fuses, and the shell develops ridges. As the juveniles grow, they burrow into the sediment, maintaining contact with the surface using only the siphon (Eversole 1987). Prior to sexual maturity, hard clams go through a hermaphroditic stage (occurring at 6 to 7 millimeters in length) having both male and female gonadal cells while functioning mostly as males (Eversole 1987). At the end of this stage they become either male or female and reach maturity by age two and at lengths of 3.2 to 3.8 centimeters. Hard clams in the south reach maturity in about one year, while their northern relatives mature in two years, thus sexual maturity in northern quahogs is dependent on size rather than age (Eversole 1987). In their first 5 to 6 years, quahogs can reach sizes of 5 to 6 centimeters (littleneck) and reach their maximum length of 15 centimeters at an estimated 20 years."

Answer 2

The fertilization of clams is external. This means that male and female adult clams release their gametes (eggs and sperm) into the water, and these combine to form zygotes. The zygote develops into a veliger larva, which is a little transparent free-swimming animal that drifts as part of the marine plankton. The veliger is like a miniature bivalve with cilia that help it move.
This is what the young clam larva looks like:
http://www.imagequest3d.com/ImageFolio3_files/gallery/aquatic/larvae/mollusc_larvae/tn_PDP00512.jpg

After a period of planktonic life, the veliger metamorphoses and sinks to the bottom to live like an adult clam.

Bivalve life cycle:
http://el.erdc.usace.army.mil/zebra/zmis/image/lifehistory2.gif

Answer 3

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they are not born but Hatched and that without the shell, i guess. lot of molluscs hatch a larva that lives a parazite lifestyle in the gills of fish, and later it falls apart from the host and lands at the seabed, where it produces its shell. thats it.

Answer 4

well wen a mommy clam and a daddy clam love each other very much they decide to have a baby clam and i think you no the rest

Answer 5

wow i guess nobody ever though of that cause
i know i nerved took the time of a day

Answer 6

Woa, thats a- - - - thats a--- ummm wierd question.... i seriously have NO IDEA!

Answer 7

well i tell u but i think u should ask your mommy r daddy to tell you the story about the birds and the bees

Answer 8

Good Question!!
i'll look it up.
if i knew i'd tell you :-)
seriously smart question

Answer 9

normal

Answer 10

cool question. never really thought of that lol.