Naslov
Predation in turbellarians: Dugesia gonocephala as superior predator - preliminary observations

Autori
Kovačević, Goran ; Tramontana, Petra ; Petrinec, Daniela ; Špoljar, Maria

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
3. simpozij o biologiji slatkih voda ; knjiga sažetaka = 3th Symposium on Freshwater Biology (SOBS2019) : Book of abstracts / Ivković, M. ; Stanković, I. ; Matoničkin Kepčija, R. ; Gračan, R. - Zagreb : Hrvatsko udruženje slatkovodnih ekologa, 2019, 52-52

Skup
10. simpozij o biologiji slatkih voda (SOBS2019)

Mjesto i datum
Zagreb, Hrvatska, 15.02.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
turbellarians ; predation ; microcosm
(turbellarians ; hydra ; predation ; microcosm)

Sažetak
Turbellarians (flatworms, Platyhelminthes) in freshwater or moist terrestrial environments are mainly predatory species. In these experimental setups, we assessed interaction between turbellarians Dugesia gonocephala (Duges, 1830) and Polycelis felina (Dalyell, 1814) in terms of their competitive capability. In ex situ microcosms experiment turbellarians were exposed through the day-night rhythm to different temperature and light conditions: 25 °C and 8 h light, 13.5 °C and 16 h dark, respectively. The results were recorded immediately and every 1, 8 and 24 h after the beginning of the experiment. Five replicas with both fed and starved animals were set up. Species D. gonocephala, in both conditions of temperature and light, attacked and preyed upon P. felina and took over pigmentation from P. felina considering that P. felina is black colored and D. gonocephala is grey transparent. There was no reverse process recorded. Moreover, it was noticed that previously fed D. gonocephala specimens more likely attacked P. felina than starved individuals did. Also, the higher rate of predation was present at higher temperature (25 °C) than under the conditions of lower temperature (13.5 °C). Generally, when turbellarians were put in microcosm at the beginning of the experiment, they were very agile searching for prey. Afterwards, D. gonocephala and P. felina rested mostly on the opposite sides of microcosms. Results of our study indicated new insights into predation among turbellarians and more information about freshwater micro-ecosystem food competition.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

Napomena
ISSN 2459-8402.

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