The Trout Mystery- Bell 2 by Erin Stern https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo State your claim as to what caused the trout to decline, provide evidence for your claim and include your name en-us 2021-10-05 17:09:57 UTC 2025-12-22 09:32:08 UTC hello@padlet.com https://padlet.net/icons/png/1f41f.png Mrs. Stern sterne8_1 https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796102097 I believe that _________ caused a decline in trout because _____________________.]]> 2021-10-06 11:17:02 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796102097 Max V. https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796490533 I believe that both the sea lamprey and the dioxin caused a decline in the trout pop. because the sea lamprey were initially introduced and the trout population start going down why the sea lamprey get a spike in there pop. however both the sea lamprey and the trout started going down when the dioxin came in and had a big increase in their pop. as well. So in conclusion both the sea lamprey and the dioxin made an impact in the trout pop.]]> 2021-10-06 13:35:37 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796490533 omr omarkamel68 https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796495076 I believe that ___bioaccumaltion and sea lamprey______ caused a decline in trout because ________sea lamprey is an apex predator and the great lakes is filled with phosphorus and green goo which kills trout.]]> 2021-10-06 13:36:47 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796495076 Looper cooperstephens08 https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796495233 I believe that the sea lamprey and the dioxin caused the decline in the trout. The reasons for this are that the dioxin levels were above 100 for more than 20 years, and when the dioxin went up the trout went down. Another reason is that once the sea lamprey was introduced to the great lakes the trout kept on declining. The sea lamprey also lay hundreds to thousands of eggs at once causing a large population increase. The sea lamprey has no natural predators in the great lakes.]]> 2021-10-06 13:36:49 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796495233 Brody Jordan brodyjordan66 https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796500579 I believe that both sea lamprey and the dioxin levels affected the trout population because the dioxin levels were 100 percent for 20 years. On 10.1 The graph shows how the lamprey and trout affected each other]]> 2021-10-06 13:38:10 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796500579 Elijah Betteridge https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796504693 I believe that sea lamprey and dioxin levels are causing a decline in the trout population because when the sea lamprey population trended upwards (On the graph in 10.1) the trout population trended downwards, and straight into the ground. I believe that dioxin levels were also causing a decline in the trout population because when the amount of toxins reached over 100ppt (Graph in 12.1) the trout population started steadily declining. ]]> 2021-10-06 13:39:16 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796504693 Minahil rai minahilrai94 https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796506805 I think that the dioxin levels and the sea lamprey invasion caused a decline in the trout population. This is because the graphs show that the trout population decreases when the dioxin levels and sea lamprey population increase, and vice versa. ]]> 2021-10-06 13:39:49 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796506805 Ainsley https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796509404 I believe that both the sea lamprey and the dioxin levels affected the trout population because the sea lamprey could eat the perch or the perch could have the dioxin in it's body and then when the sea lamprey sucks the blood of the perch it will get sick. ]]> 2021-10-06 13:40:26 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796509404 Abril https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796511373 I believe that  both the sea lamprey and the dioxin levels affected the trout population caused a decline in trout because when the lamprey were introduced the levels of fish were going up and down same thing happened with Dioxin levels.]]> 2021-10-06 13:40:55 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796511373 Nithya https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796512911 I believe that sea lamprey and dioxin levels in the Great Lake caused a decline in trout because Sea lamprey is a nonnative to the environment and had no natural predators which allowed the sea lamprey to have an unlimited supply of food so they ate many trout which caused a sudden decline. Another reason the trout population is decreasing is because of the dioxin levels in the Great Lake since trout are consumers the process of bioaccumulation takes place so the other fish the trout eat pass on the toxins to the trout causing the trout population to decrease rapidly harmful chemicals can also cause the trout population to decrease.]]> 2021-10-06 13:41:20 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796512911 Collin Minogue https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796513396 I believe both the sea lamprey and dioxin levels affected the trout population. (Also green goo) There are many pieces of evidence from our activities that support this. In activity 12.1, the table says that with dioxin levels above 100 can kill all living things. This is definitely one reason why the trout population declined during the period of 20 years when it was over 100 in the great lakes. Activity 10.1 shows that while the sea lamprey were increasing rapidly, the trout population was going down just as fast. These are just two pieces of evidence that show why the trout population was declining. There are many other reasons. In conclusion, dioxin, green goo, and sea lamprey affected the trout population.]]> 2021-10-06 13:41:27 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796513396 terling sterlinglewis81_1_1 https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796514610 i belive that that sea lamprey and the dioxin level are affecting the trout levels, because the when the dioxin levels go up the trout levels go down same for the sea lamprey]]> 2021-10-06 13:41:45 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796514610 Pranathi Ravipati https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796514925 I believe that both the sea lamprey and the dioxin levels caused to decline the trout. The sea lamprey increased in 1953 - 1960 and the trout population decreased very much because the lamprey were killing them. The sea lamprey feed on them as well as kill. The sea lamprey spends more time attached to the fish. They are much bigger than native lamprey which causes more damage on the trout. In 1950 the trout population started to decrease drastically while the dioxin levels increased very much. The effect of the increased amount of dioxin caused trout to decline, die, have cancer as well as deformities. ]]> 2021-10-06 13:41:50 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796514925 Dr. Sir Mr. Zachary https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796514929 A believe that the Lamprey / bioacumulation ( calling it dioxin because the article did and we did ) caused some of the problem. in 12.1 and 10.1 it showed that the trout population and the sea lamprey and Dioxin population were all relative with each other. in the dissection / 7.1 and the videos the lamprey are sucking the energy from the trout and leaving them weak for predators, and even weaker because of the dioxin. in 12.1 it is said that for 20 years the dioxin levels were 200ppt at its highest, and that 100ppt means all living things will die. In 10.1 when the Sea lamprey were introduced to the great lakes the trout population rapidly declined and went to near extinction in the great lakes.


]]> 2021-10-06 13:41:50 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796514929 Brinkley https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796515116 I believe that both the sea lamprey and Dioxin levels caused a decline in Trout because In the dioxin graph in activity 12.1 it showed between 1950-1960 the amount was very high and trout was very low. In the Lamprey dissection, we saw the internal and external features that could kill the trout. In the Fisherman's journal, he stated that "Today's catch was much smaller, as usual, If I do catch even one they have a strange wound on the side of the body." That indicates that the Trout had something to do In activity 7.3 I wrote that the sea lamprey is producing thousands of more eggs, no natural predators in the great lakes and Sea Lamprey can swim faster S-swimmer so it can catch its prey much faster. ]]> 2021-10-06 13:41:54 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796515116 Ritvik M https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796519686 I believe that both Sea Lamprey and Dioxin levels Affected Trout population because the graph on activity 10.1 shows that the population of trout went down while sea lamprey population went up. In activity 12.1 the graph showed that the trout population went down as well the sea lamprey population went down as well, while the Dioxin levels went up. ]]> 2021-10-06 13:43:02 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796519686 Anvitha https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796521324 Dioxin, green goo, Sea Lamprey, Chub, and habitat loss all impact the trout population. 
In lesson 12.1 Analyzing Dioxin Data, the graph shows that the trout population went down as the dioxin level went up. This proves that dioxin is killing trout.
Lesson 11 When More is too Much, has a data table that says that the dioxin caused decrease in some populations like the Small Fish.
Lesson 7.3 Constructing a Scientific Explanation explains that the Sea Lamprey don't have any predators in its non-native area. This helps it reproduce easily. It also catches a lot of its prey (trout). 
In Lesson 10.1 How Does the Sea Lamprey affect the trout, the graph shows that the Trout population gets impacted by the Chub population (the Trout's prey), as it increases and decreases too. 
In Lesson 12 Return of the Green Goo, it explains that the chemical Phosphorus can make algae grow out of control, which kills the trout population and other organisms. 
Habitat loss can also effect the trout population. Pollution from cities can carry into the lakes and effect the organisms there.  Fishermen can also carry harmful substances and invasive species as they fish. ]]> 2021-10-06 13:43:25 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796521324 Octavius C. https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796542469 I believe that both caused the decline because when the sea lamprey traveled to the great lakes they caused trouble to not just the trout but other fish. We can see that the dioxin was harming them because the graph on 12.1 showed the decline when dioxin was introduced. ]]> 2021-10-06 13:48:36 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796542469 Drew M https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796545712 I think Sea lamprey and dioxin affected the Trout population. On activities Lamprey and Trout effect each other. When dioxin went up Trout went down.]]> 2021-10-06 13:49:21 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796545712 Jesse W https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796547325 I believe that both the Sea Lamprey and the Dioxin level's made the trout population decline because in the 12.1 Dioxin Levels activity there was a graph that showed you that when dioxin levels were higher up, they brought down the trout population.
And as for Sea Lamprey, they were an invasive species with no predator and thought of trout as an easy catch and tremendously brought down the trout population and the Sea lamprey's population would then sky-rocket making the Sea Lamprey and Dioxin levels an apex predator]]> 2021-10-06 13:49:46 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796547325 Maitri B. https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796564194 I believe that the cause of the decline of the trout population is the sea lamprey and the dioxin. If you look at the dioxin levels in 1950-1970, they were above 100 which could seriously harm the aquatic life. A fisherman wrote down how his fishing would go when the trout were being affected by the sea lamprey. "I remember coming to this same spot last year and catching twice as many trout every day. And even if I do manage to get a good catch, some of the fish are showing up with these strange wounds on the sides of their bodies." The Sea Lamprey also use their mouths (which do not have jaws) to attach themselves to the trout and suck their blood and their tissues.

]]> 2021-10-06 13:53:48 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796564194 Jackson B. https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796569192 I believe that both the sea lamprey and dioxin caused the decline in trout. In activity 12.1, it shows that in around 1950, the population of trout started to decrease. At the around the same time the amount of dioxin increased in trillions. In around 1970, the amount of dioxin decreased. Again, at the same time the population of trout increased. This means that the levels of dioxin caused the decrease in population in trout. In lesson 10.1, it shows poof that the sea lamprey killed the population of trout. In 1950, the trout population decreased as the sea lamprey population increased. Because of this, the sea lamprey was another cause in the decline in trout. Both dioxin and Sea lamprey are the reason of the decrease in trout population.]]> 2021-10-06 13:54:57 UTC https://padlet.com/sterne8_1/s6d4y3jfsvmew5lo/wish/1796569192