The tolerance range of a species is determined by environmental conditions. The range of temperature from 90°f to 94°f for this particular fish species is the Physiological stress zone. Option B.
What is the tolerance range of a species?
The tolerance range can be defined as the range of environmental conditions between which an organism or a species is potentially capable of surviving.
When talking about environmental conditions, we are referring to factors such as temperature, pH, latitude, altitude, salinity, humidity, radiation, etcetera. These are the limiting factors.
Limiting factors are environmental biotic or abiotic conditions that directly act on populations and individuals, limiting their distribution and growth. These factors affect natality and mortality rate, migration, etcetera.
The tolerance range depends on the species and the individual development stage.
• Different species express different tolerance ranges for the same limiting factor.
• An individual can change its tolerance range with time.
Three different zones can be distinguished for a species according to its tolerance range,
- Optimum zone → there is a high number of individuals
- Physiological stress zone → there is a low number of individuals
- Intolerance zone → No individuals at all
In the exposed example,
- Optimum zone → Between 95F-96F
- Physiological stress zone → 97F-100F and 90F-94F
- Intolerance zone → Above 100F and Below 90F
In the attched files you will find a graph with this information.
The range of temperature from 90°f to 94°f for this particular fish species is the Physiological stress zone. Option B.
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Complete question:
Use the following example for the question. A species of fish can withstand a narrow range of temperature. Above 100F there are no individuals present. In the range from 97F-100F and 90F-94F there are a few individuals present. Below 90F there are no individuals present. Between 95F-96F there are many individuals.
What would you label the range of temperature from 90F to 94F for this particular species?
A. zone of intolerance
B. zone of physiological stress
C. tolerance limit range
D. optimal range
E. range of tolerance
