Search
- Filter Results
- Location
- Classification
- Include attachments
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/08%3A_Life_Histories/8.02%3A_Semelparity_versus_IteroparityOne class of models that tries to explain the differential evolution of semelparity and iteroparity examines the shape of the trade-off between offspring produced and offspring forgone (offspring that...One class of models that tries to explain the differential evolution of semelparity and iteroparity examines the shape of the trade-off between offspring produced and offspring forgone (offspring that will not be produced). In the first graph, the marginal cost of offspring produced is decreasing (each additional offspring is less "expensive" than the average of all previous offspring) and the marginal cost of offspring forgone is increasing.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_8%3A_Life_Histories/4%3A_Semelparity_versus_IteroparityIn this situation, the organism only devotes a portion of its resources to reproduction, and uses the rest of its resources on growth and survivorship so that it can reproduce again in the future [6] ...In this situation, the organism only devotes a portion of its resources to reproduction, and uses the rest of its resources on growth and survivorship so that it can reproduce again in the future [6] . However, it is also possible (second graph) for the marginal cost of offspring produced to increase, and for the marginal cost of offspring forgone to decrease.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/08%3A_Life_Histories/8.01%3A_What_is_life_historyOptimality is important for the study of life history theory because it serves as the basis for many of the models used, which work from the assumption that natural selection, as it works on a life hi...Optimality is important for the study of life history theory because it serves as the basis for many of the models used, which work from the assumption that natural selection, as it works on a life history traits, is moving towards the most optimal group of traits and use of energy (Stearns, 1976).
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_8%3A_Life_Histories/1%3A_What_is_life_historyFor example, "optimal investment in offspring is where the decrease in total number of offspring is equaled by the increase of the number who survive". [7] Optimality is important for the study of lif...For example, "optimal investment in offspring is where the decrease in total number of offspring is equaled by the increase of the number who survive". [7] Optimality is important for the study of life history theory because it serves as the basis for many of the models used, which work from the assumption that natural selection, as it works on a life history traits, is moving towards the most optimal group of traits and use of energy.
