few questions about Beths wonder info post.

beth

Administrator
Staff member
Micro inverts. The reason that you buy LR is because it is teaming with life, mostly micro inverts: starfish, worms, hitchhikers, snails, even micro and macro algae.
These things can not tolerate low salt conditions.
Vulcans are highly adaptable, I hear, so they can likely tolerate hyposalinity.
 

sepulatian

Moderator
Originally Posted by mkroher
http:///forum/post/3075363
if the bacteria can't survice.. then what would be there to cycle the nitrogen with the fish in the Q/T? nothing? constant water changes? Amquel+ ?

Originally Posted by florida joe
http:///forum/post/3075461
Once again sep is confusing god knows I love her, she is not taking about nitrifying and denitrifying bacteria but higher life forms

Originally Posted by Beth

http:///forum/post/3075476
Micro inverts. The reason that you buy LR is because it is teaming with life, mostly micro inverts: starfish, worms, hitchhikers, snails, even micro and macro algae.
These things can not tolerate low salt conditions.
Vulcans are highly adaptable, I hear, so they can likely tolerate hyposalinity.

Sorry, yes I was referring to things such as micro inverts and algae, not bacteria.
 

florida joe

Well-Known Member
Vulcans are highly adaptable, I hear, so they can likely tolerate hyposalinity.
Beth I must respectfully disagree I believe you are confusing the Vulcan’s with the Borg, Live long and prosper
 

locoyo386

Member
Originally Posted by mkroher
http:///forum/post/3075116
aren't SG and salinity in direct relation to each other? meaning one can't rise or decline without the other?
I'm just going by what i see in my refractometer.
Technically they are two different things. When we measure specific gravity, we are measuring the density of salt to the density of water. Salinity is the disolved salt in a body of water. The measurement of salinity is more direct and the equipment used is more accurate.
 

locoyo386

Member
Originally Posted by mkroher
http:///forum/post/3075014
but is it really stress? I read that their bodies don't have to work as hard with lower salinity levels.
I'm just trying to learn and understand as much as I can. I found a single white spot on my tang's fin, and I want to be prepared.
You are correct, their bodies don't have to work as hard and thus they will be less stressed out. The reason for not allowing low salt (or high level for that matter) levels is that their kidneys can't function properly.
 

florida joe

Well-Known Member
Laboratoire Arago, Université Pierre et Marie Curie/CNRS, BP 44, 66651 Banyuls-sur-mer, France. gboeuf@obs-banyuls.fr
Development and growth (continuous in fish) are controlled by 'internal factors' including CNS, endocrinological and neuroendocrinological systems. Among vertebrates, they also are highly dependent on environmental conditions. Among other factors, many studies have reported an influence of water salinity on fish development and growth. In most species, egg fertilization and incubation, yolk sac resorption, early embryogenesis, swimbladder inflation, larval growth are dependent on salinity. In larger fish, salinity is also a key factor in controlling growth. Do the changes in growth rate, that depend on salinity, result from an action on: (1) standard metabolic rate; (2) food intake; (3) food conversion; and/or (4) hormonal stimulation? Better growth at intermediate salinities (8-20 psu) is very often, but not systematically, correlated to a lower standard metabolic rate. Numerous studies have shown that 20 to >50% of the total fish energy budget are dedicated to osmoregulation. However, recent ones indicate that the osmotic cost is not as high (roughly 10%) as this. Data are also available in terms of food intake and stimulation of food conversion, which are both dependent on the environmental salinity. Temperature and salinity have complex interactions. Many hormones are known to be active in both osmoregulation and growth regulation, e.g. in the control of food intake. All of these factors are reviewed. As often, multiple causality is likely to be at work and the interactive effects of salinity on physiology and behaviour must also be taken into account.
 

beth

Administrator
Staff member
Originally Posted by Florida joe
http:///forum/post/3075541
Beth I must respectfully disagree I believe you are confusing the Vulcan’s with the Borg, Live long and prosper
My motto: "Resistance is futile, so you must QT."
 
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