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A fish of "normal" weight has a relative weight of 100 percent. The relative weight of a fish does not indicate its health on a continuous scale from 0 -100%, however. For example, Simpkins et al. found that juvenile rainbow trout with a condition index of less than 80% were at a high risk of dying. [9] Relative weight is one of several common ...
Total and fork length of a fish. Total length (TL) is the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body.
Weight vs. Length for Red Drum (data from Jenkins 2004) The reference weight-length formula is used to calculate how much the individual fish would be expected to weigh based on its measured length. Then the condition index is the actual weight of the fish divided by its expected weight, times 100%.
Flying-fish and allies (Beloniformes) The largest member of this order, best known for its members' ability to breach the water and glide through the sky, is the pelagic Houndfish (Tylosurus crocodilus), a slender fish at up to 1.5 m (4.9 ft) and a weight of 6.35 kg (14.0 lb). [83]
Pointers - The scale pointer marks the equal point of the object's mass on the scale and mass on the beam; Zero adjustment knob - This is used to manually adjust the triple beam balance to the 'zero' mark (check to ensure that the pointer is at zero before use). Before using triple beam balance, the scale pointer should be at zero.
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