Final Scientific Explanation on Sea Lamprey and Trout

Did the Sea Lamprey cause a decline in the Trout population?

 

The trout population declined because of the sea lamprey. According to the article fisherman’s journal, it’s hard to catch big fish and trout because the sea lamprey are eating them. Also According to the trout and sea lamprey graphs from 1945 to 1960 the sea lamprey population increased but from from 1950 to 1970 the trout population declined. According to the reading 6.1 The passages are allowing the sea lamprey to come to the Great Lakes. This is important because the sea lamprey is the top predator of the Great Lake food web which means that the sea lamprey doesn’t have any predators so nothing eats it,  so they keep reproducing and making more sea lamprey. This means that, there are more lamprey to eat the trout which declines there population.

 

When I was dissecting the sea lamprey and was looking at the mouth I could see why it’s such a threat to the trout. Even though it’s teeth are small they are sharp and that can bite through literally anything.  According to the seagrant.umn.edu, The lamprey’s Way of eating is to attach to fish with their mouth and teeth, and then use its tongue to go through a fish’s scales and skin so the lamprey can suck ups its blood and body fluids like a suction cup.  Also a single sea lamprey will destroy up to 40 lbs of fish during its adult lifetime. This means, that the trout population declines because the sea lamprey eat the trout, because the lamprey lays so many eggs there’s a lot of fish to eat the trout an make the trout population decline.

 

According to bioweb.uwlax.edu the sea lamprey lays about 30,000 eggs which is a lot. So from how many eggs it lays you can see why it’s such a threat to trout, other fish and fisherman, because they just keep reproducing and at the end there’s hundreds of thousands of sea lamprey.  The life cycle of the sea lamprey is that first the animal gets born with hundreds of thousands other siblings then a few months later has about 60,000 kids ( some don’t make it though so it brings it down to 40,000 or 30,000 eggs the hatch) next dies and this happens with almost all of the lamprey ( some are male and only the female can reproduce baby sea lamprey). This means, that there are more sea lamprey to eat the the trout, other fish and are a threat to the fisherman because they aren’t catching enof trout and other fish for people to eat because the lamprey are sucking on to the fish and eating them.

 

Sites

http://www.seagrant.umn.edu/ais/sealamprey_battle

sea lamprey graphs

article fisherman’s journal

http://bioweb.uwlax.edu/bio203/f2013/guise_aman/reproduction.htm

Testing our Rapunzel Creations

What materials did you choose for your build and why?

Popsicle sticks- For bases for the tree and the tower.

Foam- for mattress base.

Fluffing- For the bed so its squishy.

model magic- For the prince, princes, bedding and pillows.

paper- tower, base, and backdrop.

crayons- to color the backdrop, tower, and river.

Hot glue- for gluing everything on the base

string- for zip line and rope.

pipe cleaners- for the tree

gems- to decorate the top of the tower.

 

Here is a picture of my plan:

Here is a picture of my first attempt at the building process:

While you test:

What are you noticing? We noticed that Rapunzel is weighing down the zip line because of her hair and weighing down the whole backdrop.

 

What things are working? The tower stands up and the tree stands up.

 

What things are not working? Rapunzel is weighing down the zip line because of her hair and weighing down the whole backdrop. Also the zip line is too low so when she goes down the zip line she goes into the river.

 

How will you tweak this? Make this better? (Be specific and detailed!) We will first make the string tighter for the zip line, then remake Rapunzel so she can fit in the seat, and then remake the seat to fit Rapunzel.

 

Do you need any new materials? If so, WHY?

Model magic- so we can remake Rapunzel

paper- so we can remake the seat

hot glue- so we can re-glue the zip line

 

Sketch your new design with labels on a piece of paper. Make sure your drawing is detailed and specifically labeled.  

Insert your sketch here:

 

Why will this new design work better than your first attempt? What is your evidence? It will work because Rapunzel with be smaller and more tiny so she won’t way down the backdrop and the string will be titter so Rapunzel isn’t touching the ground when you put her in the seat. 

 

One Word Goal-2019

Mindfulness – כונה

I chose mindfulness for my word because I practice it and it helps me calm down at school or home when I get anxiety. I’m going to become more mindful by making sure that if I get stressed out I can use my mindfulness practice for example breathe and take deep breaths.