Caliban07
Aquarium Advice Addict
Hmm I'm struggling to understand something with regards to this I'm hoping someone can help.
Basically I want to know where the osmotic pressure is highest between fish in soft low ph water and fish that live in hard high ph waters and why.
Disregarding marine fish altogether. From what I understand water will go to the medium with the highest concentration of a solutes (opposite of diffusion) which means in fresh water fish water is constantly rushing in to there bodies. This means that the need to rid of this water by passing frequent dilute urine as to retain as much solutes as possible. Inevitably the fish will lose some. Luckily they have sodium and chloride cells in the gills that can take up these lost fluids. This uses energy and can stress the fish. To achieve this balance of loss and gain is called osmoregulation.
I also know that water will tend to go towards the side with the highest osmotic pressure. The pressure required to keep this water intake down is known as the osmotic pressure.
What I'm asking is how does the pressure compare in hard and soft freshwater fish. Which of these have the highest osmotic pressure and why?
I hope I'm making sense here?
Thanks
Basically I want to know where the osmotic pressure is highest between fish in soft low ph water and fish that live in hard high ph waters and why.
Disregarding marine fish altogether. From what I understand water will go to the medium with the highest concentration of a solutes (opposite of diffusion) which means in fresh water fish water is constantly rushing in to there bodies. This means that the need to rid of this water by passing frequent dilute urine as to retain as much solutes as possible. Inevitably the fish will lose some. Luckily they have sodium and chloride cells in the gills that can take up these lost fluids. This uses energy and can stress the fish. To achieve this balance of loss and gain is called osmoregulation.
I also know that water will tend to go towards the side with the highest osmotic pressure. The pressure required to keep this water intake down is known as the osmotic pressure.
What I'm asking is how does the pressure compare in hard and soft freshwater fish. Which of these have the highest osmotic pressure and why?
I hope I'm making sense here?
Thanks