I would like to understand the possibilities of converting growth measured as weight increment (g) in transplanted Acropora sp into linear growth (cm) for comparison.
M. Nithyanandan
Nithyanandan -
It sounds like maybe you are looking at nonlinear regression. You could start by looking at a scatterplot of the data that you do have on those two measures. You would then put the "predictor" variable on the x-axis, and the one you want to "predict" (i.e., "estimate" - not a time series, by the way) on the y-axis.
Cheers - Jim
PS - I assume you have continuous data.
Maybe not fully applicable, but at least simple:
Assume the object's density is mass independent. If so, then the cube of its linear size (the volume) is strictly proportional to the mass of this object. Conversely: linear_size ~ mass1/3.
Why do you want to do this Dr Nithya? Kindly explain please.
IT IS HIGHLY ENDANGERED SP. U MAY DO THE LENGTH ONLY, BUT YOU SHOULD NOT DO THE WEIGHT. FOR THE WEIGHT, WE HAVE TO REMOVE THE COLONY OR OTHER PARTS. IT IS ILLEGAL. I accept the question of Dr. Venkataraman.
Dear Dr. Venkatraman,
I wanted to convert the data from a recent study in Persian Gulf (Jehangir et al 2012) on transplanted coral (Acropora downingi) growth which is expressed as weight. Please see attached paper . Iam struggling to compare this data with the growth data (vertical and horizontal diameter of a colony) collected during a coral transplantation experiment using Acropora downingi in Kuwait.
Best Regards,
M. Nithyanandan
Dr Nithyanandam
I went through the paper on the Short Term Growth Rate of Acropora downingi in
the Coral Reef of Hengam Island, the Persian Gulf. It is very interesting. Yes unless you convert the growth in weight you cannot compare. Usually the growth rate is measure in size. It is also possible by weight. Have you taken the measurements of initial size and initial weight of the Acropora to be transplanted? then only you can compare.
Best wishes to your good work.
regards
K Venkataraman
Dear Sir,
Growth of transplanted A. downingi that I have measured from the beginning is only by size. So comparing with weight makes it difficult where there is hardly any regional works to compare. Thanks! for your suggestions.
Best Regards,
M. Nithyanandan
Hi! Yambem,
Thanks! for your reply.
Best Regards,
M. Nithyanandan
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