please cite your sources if you use things off the web/books You must acknowledg
ID: 35573 • Letter: P
Question
please cite your sources if you use things off the web/books
You must acknowledge outside sources of info. On the island of Trinidad off the coast of Venezuela, guppy fish populations live in high altitude, mountain streams and low altitude streams near the coast. In the mountain streams, the fish predator is a killifish. This predator prefers juvenile guppies so mortality is much higher on juvenile guppies than adult guppies. In low altitude streams near the cost, the main predator is a cichlid, and this predator prefers adult guppies. Please fill in the life history traits (in a relative sense) in these 2 environments where age-specific mortality varies. For example, you can say that age at first reproduction will be later in coastal streams and earlier in mountain streams. For each life history, briefly explain why natural selection would favor these life history traits. Age at First Reproduction Investment in Reproduction versus Metabolism/Repair Size and Number of Offspring (Fewer/Larger or More/Smaller High Altitude Environment (Higher Juvenile Mortality) Low Altitude Environment (Higher Adult Mortality)Explanation / Answer
Age at First reproduction
Investment in Reproduction versus Metabolism/ Repair
Size and Number of offspring (Fewer / Larger or More/ Smaller)
High Altitude Environment (Higher Juvenile Mortality)
Earlier in Mountain streams
More in Mountain streams
Smaller size and more number of offspring in Mountain streams
Low Altitude Environment (Higher Adult Mortality)
Later in Coastal streams
Lesser in Coastal streams
Larger size and fewer number of offspring in Coastal streams
Reason
When at high risk of predation guppies attain maturity and start reproducing at earlier age.
When at risk of predation guppies prioritize to reproduce than investing resources for metabolism/ repair.
The body size of guppies correlate with their age and some unfed female adults tend to feed on their fry.
Age at First reproduction
Investment in Reproduction versus Metabolism/ Repair
Size and Number of offspring (Fewer / Larger or More/ Smaller)
High Altitude Environment (Higher Juvenile Mortality)
Earlier in Mountain streams
More in Mountain streams
Smaller size and more number of offspring in Mountain streams
Low Altitude Environment (Higher Adult Mortality)
Later in Coastal streams
Lesser in Coastal streams
Larger size and fewer number of offspring in Coastal streams
Reason
When at high risk of predation guppies attain maturity and start reproducing at earlier age.
When at risk of predation guppies prioritize to reproduce than investing resources for metabolism/ repair.
The body size of guppies correlate with their age and some unfed female adults tend to feed on their fry.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.