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Standard weight equation for largemouth bass [1] and burbot [2] (fish). Standard weight in fish is the typical or expected weight at a given total length for a specific species of fish. Most standard weight equations are for freshwater fish species. Weight-length curves are developed by weighing and measuring samples of fish from the population.
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%.
This measurement excludes the length of the caudal (tail) fin. [1] 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 ...
Weight vs. length for channel catfish, where b = 3.2293 and = cm [15] An average adult channel catfish measures at least 12 inches (30 centimeters) long, and weighs between 2 and 4 pounds. The largest specimen on record weighed 58 pounds and was caught in 1964 by an angler in South Carolina.
Weight vs. length for black drum based on data from the Calcasieu Estuary, Louisiana. (Fall female curve is obscured by the spring female curve. Data are from Jenkins, 2004) Length vs. age for black drum from two Gulf Coast locations. Annual growth rate for ages 1–3 is 100–150 mm/year and then slows to 10–50 mm/year for ages 10–20. [10]
Fish ages are often examined along with measurements of length and weight which combined can provide information on stock composition, age at maturity, life span, mortality, and production. Other purposes of performing age structure analysis are growth analysis, population dynamics estimates and resource management.
Drawing of a mature striped marlin. The striped marlin has a torpedo-like body, dark blue or black above and silvery-white below, with an average length of 2.9 m (9.5 ft), a maximum length of 4.2 m (13.8 ft), and weight up to 220 kg (490 lb). [2]
A weight-length relationship was determined for a sample of 1,984 Florida pompano collected along the Gulf Coast of Florida between 2000 and 2002. [6] The fish sampled ranged in length from 79 to 481 mm (3.16-19.24 in). For this sample of Florida pompano, b = 2.9342 and c = 0.00076.