I am conducting research of stomach content of fish that mostly larvae. However, i can't get the value of Fullness index as most fish are small so that the stomach contents can't be weighed and i have only 0.0001 precision weighing scale
Have you tried to weight the whole fish, removing the stomach contents and then measuring the fish again? the difference of the values should be a estimation of the contents's weight.
If it isn't possible, you could pretty much use Archimedes buoyant force: the weight of dislocated water should equate the weight of the mass you put on the water... You just need a small graduated beaker filled with water. Then, weight is just density (you can get a estimation of water density on the internet) X dislocated volume (that you measure on the beaker). It is not as precise as a scale, but should do it.
Olá, uma sugestão é utilizar medidas de volume, como milimetros cubicos, usamos essa metodologia para peixes juvenis.
Breno Silva Macário do you have any journal or publication relation steps or example of cubic milimeters methods for measure the volume ?
Adinda Kurnia Putri
Araújo, A. L. F. D., Dantas, R. P., & Pessanha, A. L. M. (2016). Feeding ecology of three juvenile mojarras (Gerreidae) in a tropical estuary of northeastern Brazil. Neotropical Ichthyology, 14(1).
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