Loggerhead sea turtles are listed as threatened by the US government. Female tur

Question

Loggerhead sea turtles are listed as threatened by the US government. Female turtles die from different causes depending on how old they are (eggs/hatchlings, juveniles & subadults, mature breeders who come ashore to nest), and different conservation measures are needed to increase survival during each of these life stages. Conservation biologists were interested in figuring out which strategies were most useful, so they applied Population Viability Analysis to this population.

Describe what Population Viability Analysis (PVA) is and then use this study of loggerhead sea turtles to describe how we can use it to evaluate the effectiveness of different conservation measures.

• Background on PVA – what it is and how conservation biologists use it (provide general background information on PVA here, focusing only on demographic matrix models)

• What the important sources of mortality for each life stage is in sea turtles

• What conservation strategies have been used to reduce mortality at these life stages

• Which strategies the PVA predicted would be most effective, with an explanation about how researchers arrived at that conclusion

Explanation / Answer

Population Viability Analysis (PVA)

Population viability analysis or PVA is a statistical in ecology tool. It uses to measure the extinction probability of a population for given particular years. So it is called as risk assessment counter. This is used in conservation biology for a specific species. It has following characteristics:

The Loggerhead sea turtles can save only by the sub national policy using conservation program and development program together. The process is used under active adaptation. It includes their habitats restoration, managing their restoration and proper protection from the identified threats; the threats which are expressed in the question.

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