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Papers > Science > Life History of four species of Genus Pectinia
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Life History of four species of Genus Pectinia |
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Abstract A diverse range of genus Pectinia is found all along the reef slope on the Orpheus Island, GBR particularly P. ... It has a medium life span and a slow to medium growth rate. ... Yet, how a coral divides this energy varies for each species. Corals store energy in different regions based on their environment and their evolutionary life histories. The emphasis of this particular study was to focus on the life history of one particular genus, Pectinia, and then to develop an independent project. This was done by examining four species of coral, Pectinia lactuca, Pectinia paeonia, Pectinia alyeni, and Pectinia alcicornis. “Pectinia is also known as Lettuce, Hibiscus, Palm, Carnation, Cabbage, Plate, or Antler Coral. Its genus name, Pectinia, was derived from the Greek word pectinis (comb), which describes its comb-like fragile skeleton” (PetEducation website, 2003). However, the objective was to make a joint effort about the genus based off the results collected. Life history is an all-encompassing concept which includes examining its habitat, its distribution and abundance, its size structure, and its growth strategy. ... After determining where Pectinia placed most of its energy, the independent project then began to examine this relationship further by seeing if there was a difference in proportion amongst the four species. ... In terms of identifying differences amongst the four species, this was done through practice. ... Four dives were completed to examine the life history of the coral Pectinia, specifically P. ... It was hypothesized that one species would illustrate this best; however, it was uncertainty whether this was going to be legitimate experiment because it was reliant upon such a small sample size. ... The ultimate result was that two other Pectinia species were introduced, P. ... Needless to say, it became difficult to identify the four distinct species because there were so many similarities. ... 45 specimens were found from all four species. In addition, histological slides were made of Pectinia. ... Pectinia did not appear to be stressed about repairing itself. ... paeonia was still the most prevalent species, followed by P. lactuca, and then the combination of other Pectinia. In addition to frequency of coral species, the percent surface area that was injured was also examined. The largest division for all four species was the 0-10% injured surface area. ... lactuca being found in the shallowest regions with a few large colonies in the deep, and other Pectinia being found at all depths and all sizes. ... 1083 and other Pectinia had y=0. ... The following analysis of variance test was performed where other Pectinia produced the only significant f-value, 0. ... However, the sample size for other Pectinia was 8 out of 59, so this could be due to a small sample size. ... Discussion The main physical characteristic that sets Pectinia apart from other corals is its foliaceous form which resembles that of a carnation. ... Therefore, it is sensible that Pectinia wants to remain hidden in crevices where it would not be at risk of being nibbled on by predators. Therefore, it is perceived that Pectinia is trading off sunlight for protection. But by being protected, Pectinia can grow at its own rate and not have to deal with the major side effects typically associated with storms or cyclones, such as being overturned. However, this does not imply that Pectinia does not compete with other corals. Pectinia is not the only coral that prefers to be in sheltered locations. ... This would result in situations like stand-offs, overshadowing, or direct overgrowth of Pectinia. It was recorded that Pectinia does compete with at least 6 other corals for the same space. ... However, there are no records of Pectinia winning. Despite its lack of competition, Pectinia was found all along the reef in the depth range of 1-6m. ... This indicates the other major area in which Pectinia places energy, sexual reproduction. This is a logical adaptation for the coral because it does prefer sheltered locations and the likelihood of the species being able to survive without massive spawnings would never occur. ... The results collected for the independent project demonstrated that other Pectinia was found at all depths and all sizes, P. |
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Title: Life History of four species of Genus Pectinia
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