Exam 3 (L21, 24) Flashcards
Life History
Collection of stage or age specific traits or factors directly affecting an individual’s reproductive success
3 main elements of life History
- Pattern of development and growth
- Lifespan
- Timing and quantity of reproduction
Sympatry vs Allopatry
Sympatry: refers to pops that live in the same geographical area without physical barriers
Allopatry: refers to the geographic separation of populations of a species due to physical barriers
Metabolism
The sum of anabolism (tissue synthesis) and catabolism (breaking of chemical bonds to produce energy)
What affects growth in fish?
- Nutrients
- pathogens
- tropic interactions
Probability
Predictability of variation (p>0.05)
When an f-stat indicates (p<0.05), what does this mean with respect to the data?
there is a significant difference in the means of the data being compared (Ha)
When an f-stat indicates (p>0.05), what does this mean in respect to the data?
there is no significant difference among the means in the data compared (Ho)
Serial/batch Spawners
Increase the # of eggs produced throughout the breeding season
Ex: round gobi
Total Spawner’s
Release all eggs produced in a breeding season in one event (few hours or days)
Ex: perch
Trade offs/risks to spawning
Delayed growth during spawning and increased risk of mortality
Plastic trait
One that can change in different environmental conditions
Semelparity
Individuals that have only a single, distinct period of reproductive output, and die afterwords
Ex: pacific salmon
Iteroparity
Individuals that normally experience several or many such reproductive events, individual survives post-reproductive event
Ex: trout in SALMO
Birth pulse
Reproductive activity is restricted to a specific breeding season
