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The effects of food and photoperiod on strobilation of Aurelia aurita polyps

2014; Frontiers Media; Volume: 1; Linguagem: Inglês

10.3389/conf.fmars.2014.02.00129

2296-7745

João Chambel,

Saffron Plant Research Studies

Event Abstract Back to Event The effects of food and photoperiod on strobilation of Aurelia aurita polyps Tânia Araújo1*, Fábio Miranda1*, João Chambel1, Susana L. Mendes1, Teresa Baptista1 and Rui Pedrosa1 1 School of Tourism and Maritime Technology, Marine Resources Research Group, Polytechnic Institute of Leiria, Portugal The trade of aquatic organisms for home and public aquariums and water gardens, along with associated equipment and accessories, has grown in last years and became a multi-billion dollar industry known as the aquatic-ornamental industry. With market growth has fostered a growing search for new ornamental species and invertebrates are one of the groups most popular and expensive of marine ornamental organisms. The valorization of jellyfish as ornamental organism features a large margin of growth. In addition there has been an attempted valorization of this group of organisms as a potential source of marine natural products (MNPs) with biomedical applications or by use in food and feed. Although the reports of mass occurrences of jellyfish worldwide have increased in recent decades, these blomms occurs during a very short period of time (a few months every year) and this seasonality compromises the utilization of collected wild jellyfish for the ornamental trade. In this way, is recommended use of specimens produced in captivity. This approach reduces the utilization of natural resources and is therefore substantially more sustainable with no dependence on wild-caught organisms, in addition to allow a more reliable supply, irrespective of season and with more control over the life cycle of the specie by manipulating culture conditions. In the present study, we hypothesize that temperature and photoperiod can influence the survival and strobilation on polyp colonies of moon jellyfish. To test our hypothesis we evaluated the effect of presence and absence of food and three photoperiods (24h:00h, 12h:12h and 00h:24h light:dark, respectively) on survival and strobilation. Polyps of Aurelia aurita (240 individuals) derived from our stock culture population maintained in seawater with 30 salinity at 20ºC were distributed for 24-well plates at 18ºC during 8 days, after temperature down for 15ºC and another 8 days temperature down to 10ºC. During one month at each 2 days all polyps were inspected under a dissecting microscope to examine survival and strobilation. After 30 days of experiment results showed 100 % survival independently of the treatment. In presence of food the strobilation increased (52.08 ± 4.11 %) comparatively with the strobilation in polyps without food (33.33 ± 4.35%) (p<0.05). Additionally, with 24 hours light increased significantly the percentage of strobilation (79, 166 ± 4,98 %) comparatively with the 12h light: 12 h dark ( 65.27 ± 9.10 %) and 00 h light: 24 h dark ( 45.83 ± 7.87 %) (p<0.05). It is important to know the environmental factors affecting the strobilation process, since the latter is directly correlated to mass occurrence of medusa. The present study provides clear evidences of the positive role of food supply and photoperiod during strobilation of polyps of moon jellyfish Aurelia aurita. However face the necessity of the optimization of the culture jellyfish conditions for ornamental trade and as source of MNPs, more studies are necessary to turned profitable the mass production of this specie. Acknowledgements The authors would like to express their sincere gratitude to ADN- Aquarium Design, Lda by supporting this project. We also thank Mariana Galvão for her enthusiastic support along the whole experiment. Keywords: Ornamental aquaculture, New ornamental species, Aurelia aurita, Jellyish, Strobilation Conference: IMMR | International Meeting on Marine Research 2014, Peniche, Portugal, 10 Jul - 11 Jul, 2014. Presentation Type: Poster Presentation Topic: AQUACULTURE Citation: Araújo T, Miranda F, Chambel J, Mendes SL, Baptista T and Pedrosa R (2014). The effects of food and photoperiod on strobilation of Aurelia aurita polyps. Front. Mar. Sci. Conference Abstract: IMMR | International Meeting on Marine Research 2014. doi: 10.3389/conf.fmars.2014.02.00129 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 10 May 2014; Published Online: 18 Jul 2014. * Correspondence: Miss. Tânia Araújo, School of Tourism and Maritime Technology, Marine Resources Research Group, Polytechnic Institute of Leiria, Peniche, Portugal, tania.araujo91@gmail.com Mr. Fábio Miranda, School of Tourism and Maritime Technology, Marine Resources Research Group, Polytechnic Institute of Leiria, Peniche, Portugal, fabio.s.miranda@hotmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Tânia Araújo Fábio Miranda João Chambel Susana L Mendes Teresa Baptista Rui Pedrosa Google Tânia Araújo Fábio Miranda João Chambel Susana L Mendes Teresa Baptista Rui Pedrosa Google Scholar Tânia Araújo Fábio Miranda João Chambel Susana L Mendes Teresa Baptista Rui Pedrosa PubMed Tânia Araújo Fábio Miranda João Chambel Susana L Mendes Teresa Baptista Rui Pedrosa Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.