Abstract
Many neurotransmitters, such as γ-amino butyric acid (GABA), can act as chemical cues influencing settlement and metamorphosis in benthic marine invertebrates. This effect has been described especially in mollusks, such as mussels, clams, or haliotids. This study describes the first record of the effect of GABA on patellogastropod populations. Special attention was paid to the effect of the compound on recruitment processes. The experiment was carried out using 10 × 10 cm artificial limestone plates that were drilled into intertidal rocks at different inclinations, and periodically treated with a 1 mM GABA solution. A total of five limpet species was considered (four patellid limpet species and the pulmonate Siphonaria pectinata). Each individual recorded on the plates as well as within a 20 × 20 cm quadrant was measured, identified to species level, and its straight-line distance to the application point was registered. Treated surfaces were the first to possess both adults and recruits. Individuals also were found in a higher number around GABA-treated plates than around controls. The results indicated that the compound may not only enhance recruitment, but also might accelerate it. Recruits were located at higher distances from GABA treated plates than from control surfaces. This supports the hypothesis that this is the life history stage most sensitive to the compound. The behavior shown by the individuals belonging to the two endangered patellid species present in the study area (Patella ferruginea and Cymbula nigra) also were analyzed. For the former, the results indicated that the use of GABA may have similar effects on recruitment similar to the presence of adult conspecifics. This is the first report of the effect of GABA on patellid limpet recruitment and population dynamics. Conservational implications of the results are discussed.
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Acknowledgements
This study was financed with a predoctoral grant from the Spanish Ministry of Science awarded to G. A. Rivera-Ingraham (AP2006-04220) and by “Autoridad Portuaria de Ceuta”. The authors express their gratitude to “Consejería de Medio Ambiente-Obimasa” in Ceuta for its support and legal assessment and to three anonymous referees for their comments and corrections on the original manuscript.
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Rivera-Ingraham, G.A., Espinosa, F. & García-Gómez, J.C. Effect of γ-amino Butyric Acid on Limpet Populations: Towards the Future Management and Conservation of Endangered Patellid Species. J Chem Ecol 37, 1–9 (2011). https://doi.org/10.1007/s10886-010-9884-1
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DOI: https://doi.org/10.1007/s10886-010-9884-1