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- Feb 19, 2020
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Going to really have to disagree with a lot you are saying because it is simply not true.
Yes, many anadromous and euryhaline species can easily adjust to widely differing levels of salinity. Monos, scats, columbian sharks etc are all good examples. Many of the species you are listing simply do not fall into this category. There are species such as ropefish, glassfish, bumble bee gobies etc. that are naturally occur in bodies of water close enough to an ocean that allow some small amount of seawater to travel up certain river ways and disperse to surrounding areas. These are commonly referred to as “low-end brackish” species. Please refer to any Neale Monks literature if you are looking for any certifiable literature on the subject. These low-end species do tolerate small amounts of salt quite well and may adjust temporarily to higher salinities, but they most likely will die unnecessarily soon under full marine conditions.
Bumble bee gobies are not going to be healthy in full marine salinity. Many species are purely freshwater and prefer black water conditions, never seeing a drop of salt in their lives. A simple fish base search will show that there are no bumble bee gobies living full marine conditions.Brachygobius Species. Same thing with
Figure 8 Puffers, clearly says not a brackish species.
Yes, many anadromous and euryhaline species can easily adjust to widely differing levels of salinity. Monos, scats, columbian sharks etc are all good examples. Many of the species you are listing simply do not fall into this category. There are species such as ropefish, glassfish, bumble bee gobies etc. that are naturally occur in bodies of water close enough to an ocean that allow some small amount of seawater to travel up certain river ways and disperse to surrounding areas. These are commonly referred to as “low-end brackish” species. Please refer to any Neale Monks literature if you are looking for any certifiable literature on the subject. These low-end species do tolerate small amounts of salt quite well and may adjust temporarily to higher salinities, but they most likely will die unnecessarily soon under full marine conditions.
Bumble bee gobies are not going to be healthy in full marine salinity. Many species are purely freshwater and prefer black water conditions, never seeing a drop of salt in their lives. A simple fish base search will show that there are no bumble bee gobies living full marine conditions.Brachygobius Species. Same thing with
Figure 8 Puffers, clearly says not a brackish species.
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