Questions tagged [limnology]

The science of inland waters, posts on Biology SE should focus on the biological aspects of this discipline.

7 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
2
votes
0answers
71 views

What is this trilobite-like creature?

This was found under a rock in a freshwater creek in Maryland. Stayed like this for while, then stretched out long, then contracted, and then JUMPED off the rock back into the water. Looks like a ...
1
vote
0answers
40 views

What does this skull belong to?

I was cleaning out my pool with a leaf scoop the other day and found a small object, which I assume to be a sort of skull or cartilaginous structure of something that had died. I live in Sydney, ...
1
vote
0answers
32 views

Oxygen supply in a trickling filter

I'm using a 300l/h trickling filter consisting of 4 round chambers in vertical alignment with 11cm diameter, 5cm height and 5cm distance for the trickling (100 to 500 holes per level) in a 15cm pipe. ...
0
votes
0answers
9 views

What strains of algae do freshwater fish, snails, and shrimp prefer?

After a deep clean, my aquarium is algae free for the moment. This is a problem for my algaephage fish, snails (mystery and especially nerites who apparently can't eat wafers), and amano and cherry ...
0
votes
0answers
15 views

Why doesn't alum coagulate my cyanobacteria?

My collected rainwater has a pronounced blue-green tint which I believe to be due to the presence of cyanobacteria. I have been trying to remove the cyanobacteria using aluminium sulphate, but it ...
0
votes
1answer
83 views

Wondering if a Ichthyologist can identify this fish for me

This will be very simple for a lot of you! But I been getting mixed answers about his catch. Is this a chinook salmon or brown spotted trout? Caught in Angus, Ontario, Canada. (Hwy 90 Bridge) I ...
-1
votes
1answer
801 views

Why sea water fish can't survive in Fresh water?

Why the sea water fish can't survive in fresh water? What really happens to the fish if it get into fresh water from sea water. What are the possible reason... Does it really depends osmotic ...