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In situ population dynamics of Aurelia aurita s.l. polyps: a modelling perspectiveHočevar, Sara, 1989- ...The drivers of moon jellyfish outbreaks are still uncertain, despite considerable research efforts in the last decades. The perennial benthic polyps determine to a large extent the medusae numbers. ... Our study was designed to assess annual and seasonal changes in polyp density and asexual reproduction rates in naturally occurring populations of Aurelia scyphistomae. A three-year survey of polyp populations attached underneath oysters at five locations in the bay of Koper (Slovenia) indicated significantly higher densities at protected sites and in the temperature window 20 % 25 %C. Budding was not significantly related to either temperature or salinity although it was more intense during warm months. In contrast, strobilation was significantly higher in the temperature window 10 - 15 °C and did not occur at temperatures < 8 or >17 °C. In order to better understand the causes of periodic dynamics observed in the population of Aurelia polyps we propose a family of non-autonomous models. The models are based on the continuous-time logistic model but include a periodic intrinsic growth rate r(t) and/or a periodic carrying capacity K(t) that reflect seasonal changes in the environment. We put forward several biologically meaningful functions r(t) and K(t) and estimate the yearly mean values of r and K from empirical data. In situ estimated values are compared with published data from laboratory experiments carried out with polyps of A. aurita collected from our monitored site.Source: Fifth International Jellyfish Bloom Symposium : Abstract book (str. 21)Type of material - conference contributionPublish date - 2016Language - englishCOBISS.SI-ID - 3915087
Author
Hočevar, Sara, 1989- |
Boldin, Barbara, 1976- |
Makovec, Tihomir |
Malej, Alenka, 1948-
Topics
meduze |
morje |
meduze |
raziskovanje morja |
Aurelia |
morska ekologija |
polipi |
ekologija morja |
sea |
medusae |
population dynamics |
Aurelia aurita |
jellyfish |
gelatinous zooplankton |
polyps
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Database name | Field | Year |
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Hočevar, Sara, 1989- | ![]() |
Boldin, Barbara, 1976- | 29452 |
Makovec, Tihomir | 18338 |
Malej, Alenka, 1948- | 04642 |
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