Where would DDT be most concentrated?

The highest amount of DDT and derivatives residues were found in carnivore fish species, C. striatus which is the top predator of food web.

Why does DDT become more concentrated?

The concentration effect occurs because DDT is metabolized and excreted much more slowly than the nutrients that are passed from one trophic level to the next. So DDT accumulates in the bodies (especially in fat).

What is concentration of DDT?

Basis for revised IDLH: The revised IDLH for DDT is 500 mg/m³ based on acute toxicity data in humans [Neal et al. 1944; Windholz 1983]. This may be a conservative value due to the lack of relevant acute toxicity data in humans exposed to concentrations above 423 mg/m³.

Which of the following is likely to have more concentration of DDT in its body?

Among the given animals, sea gull which is a fish eating bird and is present at higher trophic level, will have high levels of DDT depositon in its body.

How DDT becomes concentrated along a food chain?

When an animal consumes food having DDT residue, the DDT accumulates in the tissue of the animal by a process called bioaccumulation. The higher an animal is on the food chain (e.g. tertiary consumer such as seals), the greater the concentration of DDT in their body as a result of a process called biomagnification.

Biomagnification and the Trouble with Toxins

What concentration of DDT did the estuary have in it?

In an estuary off Long Island Sound, Rachel Carson learned that in the water the DDT measured only three parts per trillion (that's only 0.000003 ppm!). That was so low that it didn't seem dangerous at all.

What happen to the concentration of DDT in each trophic level?

Solution : DDT concentration continuously increases in successive trophic levels in a food chain. This phenomenon is known as biological magnification or biological amplification.

Which organism will have the highest concentration of insecticide?

The organisms at the higher trophic level will have more concentration of the compounds. Here, fishes are at the highest trophic level, so they will accumulate maximum amount of pesticides. So, the correct answer is 'Fishes'.

Which of these will have the highest concentration of pesticides?

1 Answer. Hawk will have the highest concentration of non-biodegradable chemicals. The phenomenon associated is biomagnification.

Which of the following organisms is likely to have maximum concentration of DDT algae fish water flea frog bird?

Which of the following organisms is likely to have a maximum concentration of DDT? Algae, fish, water flea, frog, bird. Ans. Bird.

Where is DDT found?

Animal and fatty foods contain the highest levels of DDT and PCBs because they are stored in fat and increase in concentration as they move up the food chain. Even though it was banned in 1972, vegetables, meat, fish, and dairy products contain DDT.

Which of the following trophic level has highest concentration of DDT?

The snake is a tertiary consumer. So the DDT concentration will high in snake.

Which of the following has maximum amount of DDT?

Among the given animals, seagull which is a fish-eating bird and is present at a higher trophic level will have high levels of DDT deposition in its body.

What concentration of DDT did the birds have in their bodies?

The birds' brains contained concentrations of DDE, a breakdown product of DDT, ranging from 155 to 1,043 parts per million, with an average of 552.

Why is it that the concentration of the chemical increases so much at the higher trophic levels?

Organisms at the top have a higher tissue concentration of toxins and pollutants than lower levels. The concentration system is due to persistence of the toxins, food chain energetics, and low rate of internal degradation or excretion of the substance. Trophic level I represents the primary producers.

Is the following in the correct sequence of increasing order of DDT concentration?

Hence, the correct answer is 'Water-0.003ppm, zooplankton- 0.04ppm, small fish-0.5ppm, large fish-2ppm, fish eating birds-25ppm'

Which one of the following will have the maximum concentration of DDT or BHC in its body peacock frog grasshopper snake grass?

So, the food chain will be : <br> Grass `to` Grasshopper `to` Frog `to` Snake `to` Peacock <br> In this food chain, since peacock occurs at the highest trophic level (on the extreme right side), therefore, peacock will have the maximum concentration of harmful chemicals in its body.

Where are the maximum concentration of harmful chemicals in any food chain?

The organism which occurs at the highest trophic level in the food chain will have the maximum concentration of harmful chemicals in its body. Since Kingfisher occurs at the highest trophic level, therefore, it will have the maximum concentration of harmful chemicals in its body.

Which of the following will have the highest concentration of non-biodegradable?

Solution : Hawk will have the highest concentration of non-biodegradable chemicals. <br> The phenomenon associated is biomagnification. The following organisms form a food chain.

What is DDT in biomagnification?

DDT is a Class II insecticide, meaning it is moderately toxic. Studies have proved that DDT has serious implications on human and animal health. Low-to-moderate exposure (10mg/kg) may result in nausea, diarrhoea and irritation of eyes, nose or throat, while higher doses (16mg/kg) can lead to tremors and convulsions.

Is DDT biologically active?

To put these concentrations in perspective, consider that DDT is not biologically very active or even very toxic. Its great value in malaria control is due to its persistence on house walls and its powerful repellent actions, not its toxicity. As with all living organisms, insects live in a chemical world.

Why Hawk will have the highest level of pesticides?

Biomagnifying pollutants which increase in concentration from producers → Primary consumers → Secondary consumers →Tertiary consumers → Top consumer. Hawk is the top consumer, so the pesticide concentration will be highest in Hawk.

What is the concentration of DDT for first trophic level?

Hence, the correct answer is '25 ppm'

Where is DDT stored and accumulated within an organism?

DDT tends to accumulate in the fatty tissues of insects, wildlife, and people, but produces no known toxic effects while it is stored in the fat (2).

What happens to the concentration of DDT in each trophic level * 1 point decrease increases remains unchanged becomes zero?

Hence, the correct answer is 'Increases'.