length and weight relationship of fish

it is about the length and weight relationship of fish , growth, length, weight, absolute growth, isometric growth, relative growth, allometric growth,

1. Anatomy & Biology of Shellfish Dip Sahoo TNU2022037100012 B.F.Sc. (1 st year 2 nd Sem) Submitted to Dr. Suman Takar Length and weight Relation of fish

2. Length and weight Relation of fish

3. introduction Length of a fish :- The measurement or extent of a fish from end to end, the greater of two or the greatest of three dimensions of an object or fish. Weight of a fish :- a body’s relative mass or the quantity of matter contained by it, giving rise to a downward force, the heaviness of a substance.

4. Length-weight Relation Definition :- Length-weight relationships are some statistical parameters that have been extensively used to estimate weight from length because of technical difficulties & the amount of time required to record weight in the field. Importance :-To calculate Standing stock biomass Condition indices Ontogenetic changes Fatness & wellbeing of the fish Growth pattern Shape of the fish Health of the habitat

5. Length-weight Relation For data calculation :- Total length (TL) was measured with the help of vernier calliper (Mitutoyo) nearest to 0.01mm & body weight was taken with a digital balance nearest to 0.001g. Length-weight relationship :- The length-weight relationship of the fishes was calculated by linear-regression equation of log TW=log a + b log TL A log –log plot was done for all the fishes & outliers were removed.

6. Length-weight Relation Condition Factor & Bayesian approach :- condition factor was analysed using fulton’s equation i.e. w*100/L3 Bayesian approach was used to analyses the shape of the fishes

7. Growth Growth is a bio-energetic process & is defined as a change in its length & weight over a period of time. The two parameters exhibit growth of a fish are length & weight. The growth in length indicates long term change, whereas growth in weight is more subject to variation. 1.Absolute growth 2.Releative growth 3.Isometric growth 4.Allometric growth

8. Conclusion The length-weight relationship of fish are affected by a number of factors such as season, habitat, gonad maturity, sex, diet & annual differences in environmental conditions. The larger size fishes are efficient food finders with higher foraging ability, particularly when they neither are nor involved in nest building, pre-spawning & spawning activities.

9. Any questions ?

10. T H A N K Y O U