The phrase "a profitable host" is correct and usable in written English.
It can be used in contexts discussing business, economics, or ecology, where a host provides benefits or gains to another entity.
Example: "In the world of online gaming, a profitable host can significantly enhance the user experience and attract more players."
Alternatives: "a lucrative provider" or "a beneficial host".
First, E. coli is a more profitable host than S. typhimurium for the generalist phage φX174.
Given that a phage already consumes the most profitable host (host 1) with profitability Pr1 = lnB1/L1, and inhabits an environment with host density N, should the phage consume host 2 that is a fraction x as profitable (i.e. Pr2 = x Pr1)?
In contrast, high host density was expected to impose selection to specialize on the more profitable host E. coli, and to result in a reduced rate of attachment to S. typhimurium.
Selection of the most profitable host stage also influences sex allocation patterns in arrhenotokous parasitoids [6].
φX174 populations that were capable of generating appropriate genetic variation adapted to low host density as predicted, by increasing utilization of the less profitable host.
Foraging decisions and offspring fitness-related consequences of S. harmandi led to the selection of the most profitable host stage for parasitoid development.
Low host density was expected to impose selection to incorporate the less profitable host S. typhimurium into the diet, and to result in an increased rate of attachment to S. typhimurium.
For the generalist phage φX174, the presence of S. typhimurium (the less profitable host) in experimental microcosms significantly decreased growth rate at high host density, but significantly increased growth rate at low density.
Incorporating the measured parameter values into the left and right sides of equation 5, we determined the density of E. coli below which it should be advantageous for φX174 to include S. typhimurium (the less profitable host) in the diet.
Because the selection of the most profitable host stage for parasitoid development was due to foraging decisions and offspring fitness-related consequences of S. harmandi,this may not mean that one of offspring's success was built on the side of the expense of maternal fitness.
