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Croceas length with mantle exposed and not

site30

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site30 Newbie

site30

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Dear all,

i am a student from the National University of Singapore studying aggregation patterns for T. croceas. However part of the study requires me to know what are the lengths of croceas with their mantles retracted and fully extended. Would anyone be able to help me with this? I need about 10 measurements to find the percentage change in length.

Best regards,

Martin

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site30 Newbie

site30

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Dear all,

i am a student from the National University of Singapore studying aggregation patterns for T. croceas. However part of the study requires me to know what are the lengths of croceas with their mantles retracted and fully extended. Would anyone be able to help me with this? I need about 10 measurements to find the percentage change in length.

Best regards,

Martin

Hi All,

Martin here again. Really pleading with one and all to be able to help with the above? Length would be the longest part of the clam. Need these length values so i can proceed with experimental procedures.

With much thanks!

Martin

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markietan Newbie

markietan

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Dear all,

i am a student from the National University of Singapore studying aggregation patterns for T. croceas. However part of the study requires me to know what are the lengths of croceas with their mantles retracted and fully extended. Would anyone be able to help me with this? I need about 10 measurements to find the percentage change in length.

Best regards,

Martin

mmm... interesting

i have 2 croceas, 1 green and 1 blue. they are about the same size and extends about the same when the lights are on... altough the green one is much closer to the lighting than the blue one

at night they are around 8-9cm in length

in the day time, it is about 11-12cm. dunno how to get exact measurement coz i dun have a measuring tape. and i'm sure they won't let me too. haha that's the best i can do by approximation with plastic ruler!

cheers,

Mark

:DECOMMED 5ft shallow tank:
:DECOMMED 3ft tank:
:DECOMMED 2ft nano tank:

:4ft Balcony Tank:

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site30 Newbie

site30

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mmm... interesting

i have 2 croceas, 1 green and 1 blue. they are about the same size and extends about the same when the lights are on... altough the green one is much closer to the lighting than the blue one

at night they are around 8-9cm in length

in the day time, it is about 11-12cm. dunno how to get exact measurement coz i dun have a measuring tape. and i'm sure they won't let me too. haha that's the best i can do by approximation with plastic ruler!

cheers,

Mark

Hey mark!

Thanks so much for the measurements. Two down 8 more to go! Are there any others who could help?

Cheers

Martin

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site30 Newbie

site30

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Hi Martin,

Perhaps you can make a trip down to Aquamarin. They have a lot of croceas for sale at the moment. You can take measurements to your hearts content.

CheerS! :upsidedown:

Hi Thexder!

thanks for the info. I did try contcting ##### but they weren't keen at letting me at their croceas. said i could not put even a ruler into the tank nor take photos of their clams. Not sure why but do you think aquamarin would? Have you patronised them before and got good Lobang?

Martin

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Thexder Newbie

Thexder

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Hi Thexder!

thanks for the info. I did try contcting ##### but they weren't keen at letting me at their croceas. said i could not put even a ruler into the tank nor take photos of their clams. Not sure why but do you think aquamarin would? Have you patronised them before and got good Lobang?

Martin

Taking measurements maybe possible if you ask nicely :eyebrow: But taking photos I think most shops wouldn't allow you. I have 3 croceas in my tank. I'll try to get some measurements for you.

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site30 Newbie

site30

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Taking measurements maybe possible if you ask nicely :eyebrow: But taking photos I think most shops wouldn't allow you. I have 3 croceas in my tank. I'll try to get some measurements for you.

Thank you Thexder! That would be magnifique. Looking forward to hearing from you then.

Martin

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site30 Newbie

site30

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Taking measurements maybe possible if you ask nicely :eyebrow: But taking photos I think most shops wouldn't allow you. I have 3 croceas in my tank. I'll try to get some measurements for you.

Thank you Thexder! That would be magnifique. Looking forward to hearing from you then.

Martin

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sisreefer Newbie

sisreefer

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Hi I've got 3 croceas. My green crocea is abt 9.5cm and extends to abt 12cm, the blue one is abt 9cm and extends to abt 12cm, the brown one is abt 13 cm and extends to 18cm.

All readings are estimates only especially the extended ones as clams reacts by contracting whenever it senses something is moving towards them. B)

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Thexder Newbie

Thexder

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Thank you Thexder! That would be magnifique. Looking forward to hearing from you then.

Martin

Measured with plastic ruler. Realised its not easy to measure unless you use some caliper. Error should be +/-0.5cm :look: Anyway, hope this info helps.

Crocea #1

Mantle extended 10cm

Retracted 9cm

Crocea #2

Mantle extended 7.5cm

Retracted 6.5cm

Crocea #3

Mantle extended 9cm

Retracted 8.5cm

PS: When you mention length, I presume you are referring to the axis parallel to the 2 halves of the shell. Otherwise, means I measure wrongly :lol:

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