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المؤلفGueroun, Sonia K.M.
المؤلفMolinero, Juan Carlos
المؤلفPiraino, Stefano
المؤلفYahia, Mohamed Nejib Daly
تاريخ الإتاحة2024-07-31T11:45:00Z
تاريخ النشر2020-01-01
اسم المنشورMediterranean Marine Science
المعرّفhttp://dx.doi.org/10.12681/MMS.17358
الاقتباسGueroun, S. M., Molinero, J. C., Piraino, S., & Dali Yahia, M. N. (2020). Population dynamics and predatory impact of the alien jellyfish Aurelia solida (Cnidaria, Scyphozoa) in the Bizerte Lagoon (southwestern Mediterranean Sea). Mediterranean Marine Science, 21(1), 22-35.‏
الرقم المعياري الدولي للكتاب1108393X
معرّف المصادر الموحدhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85085750422&origin=inward
معرّف المصادر الموحدhttp://hdl.handle.net/10576/57361
الملخصUnderstanding the life cycle strategies and predatory impact of alien jellyfish species is critical to mitigate the impact that these organisms may have on local populations, biodiversity, and ultimately on the functioning of food webs. In the Mediterranean Sea, little is known about the dynamics of alien jellyfish, despite this biodiversity hotspot being one of the most threatened areas by increasing numbers of alien jellyfish. Here, we investigated the population dynamics and predatory impact of a non-indigenous scyphomedusa, Aurelia solida Browne 1905, in the Bizerte Lagoon, Tunisia. The study was based on bimonthly surveys performed over two consecutive years, from November 2012 to August 2014. Field observations showed that the planktonic phase of A. solida occurs from winter to early summer. Prey composition was investigated by means of gut content and field zooplankton analyses. Calanoid copepods, mollusc larvae, and larvaceans represented the main food items of A. solida. To determine the jellyfish feeding rate and their predatory impact on zooplankton populations, the digestion time for zooplankton prey was assessed at three different temperatures: 13, 18, and 23°C in laboratory conditions, corresponding to the average range of temperatures encountered by A. solida in the Bizerte Lagoon. We found that A. solida consumed 0.5-22.5% and 0.02-37.3% of the daily zooplankton standing stock in 2013 and 2014, respectively. These results indicate a non-negligible but restricted seasonal grazing impact on some mesozooplankton groups, explained by the relatively short lifespan of the medusa stage (5-6 months).
اللغةen
الناشرHellenic Centre for Marine Research
الموضوعAbundance
Mesozooplankton
Predation
Scyphomedusae
SW mediterranean
العنوانPopulation dynamics and predatory impact of the alien jellyfish Aurelia solida (Cnidaria, Scyphozoa) in the Bizerte Lagoon (southwestern Mediterranean Sea)
النوعArticle
الصفحات22-35
رقم العدد1
رقم المجلد21
dc.accessType Open Access


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