Ecology and Evolution - Ecology Essay Example
Beren Robinson performed remarkable field study of threespine sticklebacks - Ecology and Evolution introduction. These fish closely relate to ecology and evolution. The researchers original findings are different than that of Robinson’s field study. His hypothesis states that the threespine sticklebacks varied phenotypes are the handiwork of natural selection supporting the discrepancy in the population. Diet and the environmental conditions are the variables found in this study. The ecologists also used evidence and observation to quantify results by using information from other studies and experiments.
Robinson’s study relates to evolution and natural selection, both of these play an important part in ecology. In Robinson’s study he should change the life span, growth rate and the body size to be able to understand the evolution of the threespine stickleback species of fish. In the field study that was done by Robinson, is a study that tries to determine how the species has evolved. The threespine stickleback went through an era of time where only two species of the stickleback in a lake.
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Original observations of researchers suggest that opposing selective pressures in open-water and shallow water are factors in the evolution of the threespine sticklebacks (Smith & Smith, 2009). The study that Robinson performs proves a different analysis, suggesting natural selection is the key factor. Robinson’s and the University of Guelph’s department of Zoology study starts with sampling from a population of the threespine sticklebacks. From the samples taken Robinson notes the habitats of open-water and the shallow water varies.
This means that Robinson’s hypothesis states that the threespine sticklbacks diverse phenotypes is a design of natural selection that supports the discrepancy with in the population. To test Robinson’s hypothesis he nurtures two forms of offspring in two identical laboratories (Smith & Smith, 2009). Using the variables of diet and the environmental conditions, the results indicate the each offspring maintained their differences. The first condition of the hypothesis suggests that the phenotypic variation in morphology among the two offspring is genetic (Smith & Smith, 2009).
Robinson conducted another trial to watch the feedings of the two offspring to test for trade-offs. Brine shrimp larvae, fast moving arthropods and a larger amphipod that are found in open water were used in the field study by Robinson. The ecologist used the findings from the evidence and observations of other studies to measure results. Robinson also uses some information from studies and observations from the lakes of British Columbia before he gathers a hypothesis. The studies before Robinson, implies that the species of fish evolved from the open-water and shallow water of the environment.
Robinson goes to prove these studies wrong by concluding that natural selection does occur in this specific species of threespine stickleback fish. Ecologists used experiments in laboratories to gather precise information and Robinson performed a hypothesis and generated specific tests before he made his results known. These tests were important because they held the evidence to support his research findings. Evolution and natural selection play an important role in the study by Beren Robinson. Evolution of the study suggests that the fish evolve through the process of natural selection.
Robinson’s case study provides specific scientific proof that natural selection is occurring in the population of the threespine sticklebacks. Therefore, each evolution and natural selection plays an important part in the case study. A follow-up study consisting of life span, growth rate, and body size is appropriate for the threespine sticklebacks. The variables allow a more in-depth look at the evolution of the species. The case study should involve 100 threespine sticklebacks in aquariums, and focus on genomics.
The study should focus on the physical traits of the threespine sticklebacks as well as the behavior patterns, adaptations to environments, food sources, disease, and predators. The study will reveal specific regions, which are essential for environments, and determine the patterns of change in the evolution of various traits of the threespine sticklebacks. Robinson’s field study reveals different results when comparing previous studies. Many aspects of the study relate to ecology and evolution. The hypothesis and variables in the study are proof that natural selection and evolution are key factors in the study.
Ecologists use evidence and observation to quantify results by using information from other studies and experiments. Robinson’s field study relates to evolution and natural selection, and each play an important role in ecology. Robinson’s field study should alter variables of life span, growth rate, and body size to understand the evolution of the threespine stickleback species. References Evolution. (n. d. ). Retrieved April 27th, 2012, from http://science. yourdictionary. com/evolution Smith, T. M. , & Smith, R. L. (2009). Elements of ecology (7th ed. ). San Fancisco, CA: Benjamin Cummings/Pearson.