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I believe that both dioxin and sea lamprey cause the trout population to decline because the study guide Shows on the graph that in between the 1950s and the 1960's the Dioxin went up so the trout population was declining rapidly. While on Activity 10.1 the graph between the 1950s and 1960s the population of the lamprey was high and the population of the trout went down so it was impacted by the lamprey.While on lesson 7 reading 1 the sea lamprey is an invasive species so it is dangerous to the trout population

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12.1 when the trout population starts to decline both the lamprey and dioxin increases
10.1 when lamprey starts to feast on trout they all start to decline
6 they are an invasive species so they have no predators also means they wont decline unless theres no food

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I believe that both Dioxin and Lamprey are making the trout population go down.

In the 12.1 graph it shows that the dioxin levels were much higher than the trout levels.

In the 10.1 graph the Sea Lamprey levels were much higher in 1960, just like the dioxin levels.

Even now the trout levels are going down because of both things.

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Both the sea lamprey and the dioxin levels affected the trout population. On the back side of the study guide there is a chart that shows how the dioxin levels affected the trout by showing that when the levels are low the trout thrive. Lesson 7 says that sea lamprey is an invasive species so, they are dangerous to trout. Also 10.1 says that sea lamprey are predators.

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I believe that there is not enough evidence to prove exactly what affected the trout. Although it is evident that the lamprey and dioxin did affect the trout there is no evidence that there weren't other factors involved. For example trouts predator/prey population could also affect them but there is no data to prove it

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I believe that both the sea lamprey and the dioxin levels affected the trout population to decline because the sea lamprey eats the trout, meaning when lamprey eat trout, trout decrease, and Dioxin spreads as the food chain grows, in activity 12.1 it shows the graph and the trout is dying because lamprey and dioxin harm trout. 10.1 the lamprey increased and and the trout decreased at the same time

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12.1 I think its the sea lamprey because there are so many of them and there not going to go away. Lesson 11, sea lamprey are the ones who love to eat trout. Lesson 11 i think its because there is a lot more sea lamprey than the rout population and thats what the sea lamprey eat. 12.1 The sea lamprey cant really eat anything else. 12.1 The sea lamprey can swim faster than the trout population so its easier for the sea lamprey to latch on.

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I believe that both sea lamprey and dixon levels had to do with the decline in trout

In the activity 12.1 the graph shows that when the dioxin levels were higher up you can see the trout levels go down and when the dioxin is lower the trout is higher up

Secondly in the activity 10.1 in the graph when the lamprey are introduced the trout decline and when the lamprey levels where high the trout levels were low

Lastly as I said in 12.1 the dioxin levels were not onl getting into the trout and kelling then but the dioxin was getting into what they eat so when they ate their prey the toxins where bioaccumulation inside the routes killing them

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I believe that both dioxin and sea lamprey cause the trout population to decline because on 10.1- On the graph, the sea lamprey increased and when that happened the trout decreased at the same time and when the sea lamprey decreased the trout increased. 12.1- On the graph, it shows that when the dioxin goes up the trout goes down and when the dioxin goes down the trout goes up. Also, the dioxin passes chemicals strong enough to kill lots of trouts. 7.2- The sea lamprey has no jaw and has lots of teeth with gill slits making it easier for the sea lamprey to latch on and kill the trout.

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I belive the trout popoulation is decling because dixion and sea lamprey.
12.1
When dioxen goes up the trout population goes down.
10.1
When the sea lamprey poulation goes up the trout poulation goes down.
6
The sea lamprey is an invasie species so they have no preadors and they keep increasing because nonthing is affecting them in the lakes causing the trout population to decline.

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I Believe that both the Sea Lamprey and the dioxin levels affected the lake trout population.
In activity 12.1 I found that the dioxin levels goes up the lake trout goes down. Also I found that most of the years in the graph the dioxin levels was over 100 and that means all of the living things die.
In activity 10.1 I found in the graph that when the sea lamprey goes up the lake trout goes down.
In lesson 6 The sea lamprey are an invasive species and they didn't have any predators, so the sea lamprey kept on increasing in population killing the lake trout.

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I think that both sea lamprey and the dioxin levels affected the trout population.Why? Well, in Activity 12.1 on the graph the lake trout decrease when the dioxin increased in year 1960.In Activity 10.1, On the graph the sea lamprey increased when the lake trout decrease in population in year 1960.So both Activity 12.1 and Activity 10.1, on both graphs the lake trout decrease and both dioxin and sea lamprey increased in year 1960. Finally, In activity 12.1, The dioxin level was above 100ppt for 20 years. : )

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12.1: according to the graph when the dixon levels went up the population of the trout went down,  I believe there is a relation between the two
10.1:between 1950-1950 the sea lamprey population increased rapidly and that caused the trout population to decrease around the same time as the dixon levels went up so both the factors had effected the trout population.
7.2: when we did the dissection you could see the jaw and rows of teeth on the sea lamprey causing those big wounds on the trout.

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12.1 When dioxin goes up the trout population will decline and when the dioxin levels were changed in 1970 it got way better.
10.1 When sea lamprey populations go up the trout will go down and this has a drastic impact on the ecosystem.
Lesson 6 The sea lamprey are a invasive species so they have no natural predators so the population grows out of control and overfeeds.

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12.1. When the dioxin goes up the trout goes down due to the dioxin killing it/infecting it and when the dioxin does that it infects many other creatures.
7.3. The sea lamprey is a s swimmer making it easier to kill the trout
6.1. Sea lamprey has no predators in the great lakes and can live in both fresh and salt water. No predators means no one is keeping there population under control

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I believe that both the sea lamprey and dioxin levels caused to affect the trout population. On the 12.1 Analyzing Dioxin Data graph shows that the when the trout was low the dioxin levels were over 200 ppt and the trout were under 0. In 10.1 the graph shows that when the trout was low the lamprey was high.

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I believe that what caused the trout population to go down was the dioxin and the sea land prey because in activity 12.1 it shows that when the dioxin levels were high, the trout population would be low and also in activity 10.1 in the graph when the sea land prey population was high the trout levels were low.

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I believe that both the Sea Lamprey and the Dioxin levels caused the trout to decline because whenever the Sea Lamprey population or the Dioxin levels went up, the trout population went down. This makes sense because Dioxin was probably introduced to the trout through bioaccumulation. The Sea Lamprey has a wide diet and no natural predators in the area to keep the population in check.

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12.1. During the 1950s through the 1970s the dioxin levels were very apparent, and during this time the trout population dramatically decreased.
7.3. The sea lamprey is an S-swimmer making it easier to catch up to its prey.
6.1. Sea lamprey have no predators so they can reproduce much easier which increases the population, therefore, decreases the trout population.
Both predators played a part in declining the trout population

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12.1
When the dioxin goes up the trout population goes down
10.1
When the sea lamprey goes up the trout population goes down
6
They are invasive spesise so they have no predators so they are increasing

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I believe that the trout population declined due to both the Dioxin chemical that is poured into the great lakes from making plastics, but also the Sea Lamprey because with both the lamprey and the dioxin increasing, the trout almost completely died out, and many dead trout have been seen with circular quarter-size wounds on their sides from the Lamprey.

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Mrs.Stern I think that the sea lamprey is what is making the trout population decease because the sea lamprey is an invasive species so it does not have that many predators so it can increase the population of sea lamprey and the more sea lamprey the less trout because then all the sea lamprey will eat all the trout.

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I think that trout population declined due to dioxin levels and sea lamprey. 12.1-On the graph it shows that whenever the dioxin levels are up, the trout population goes down.
10.1-Whenever the sea lamprey population increases, the trout population decreases
7.2-The sea lamprey has no jaw and have gill slits which makes in easy for them to kill lake trout.

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I believe that what caused the trout population to decline was high levels of dioxin because, according to the graph in activity 12.1 through 1950-1970 the dioxin level was over 100ppt. The key in activity 12.1 states that levels of dioxin over 100ppt will kill everything. Through the 20 years of the dioxin levels being above 100ppt the trout population eventually hit rock bottom.

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I believe that ____________ caused the trout to decline because __________________.