Abstract


EVALUATING THEORETICAL MANAGEMENT STRATEGIES FOR THE BOX JELLYFISH CARYBDEA MARSUPIALIS USING A MATRIX POPULATION MODEL (INVERSE METHOD FOR TIME SERIES)

Population projection matrix (PPM) models are widely used in ecology. Unfortunately, for pelagic marine organisms, it is difficult to mark individuals to determine their vital rates and built a PPM. Nevertheless, it is possible to get time-series of sizes/ages and densities, in order to determine the parameters of a PPM. This approach is known as a “demographic inverse problem” and it is based on quadratic programming methods. We used unpublished field data of a population of box jellyfish Carybdea marsupialis to construct a PPM, performed a sensitivity analysis and comparison of two different management strategies to lower population. The most sensitive demographic parameter of PPM to changes in population growth rate was stasis of the biggest size class. Our results showed that removal of jellyfish from all size classes was the most effective strategy. When reducing prey, the highest efficiency occurred when affected prey of all medusae sizes. This method is applicable to other marine species, for which population structure over time are available.

Authors

Bordehore, C., Department of Ecology, IMEM Ramon Margalef. University of Alicante., Spain, cesar.bordehore@ua.es

Fuentes, V. L., Institute of Marine Sciences, CSIC, Barcelona, Spain, vfuentes@icm.csic.es

Segarra, J. G., Department of Ecology. University of Alicante., Spain, josegsegarra@yahoo.es

Acevedo, M., Institute of Marine Sciences, CSIC, Barcelona, Spain, acevedo@icm.csic.es

Canepa, A., Institute of Marine Sciences, CSIC, Barcelona, Spain, canepa@icm.csic.es

Raventós, J., Department of Ecology, IMEM Ramon Margalef. University of Alicante., jraventos@ua.es

Details

Oral presentation

Session #:036
Date: 2/25/2015
Time: 11:30
Location: Seminario 3-4-5 (Floor 1)

Presentation is given by student: No