Detailed Information on Publication Record
2018
The predatory behaviour of Monopelopia tenuicalcar (Kieffer 1918) larvae in a laboratory experiment
SYROVÁTKA, VítBasic information
Original name
The predatory behaviour of Monopelopia tenuicalcar (Kieffer 1918) larvae in a laboratory experiment
Authors
SYROVÁTKA, Vít (203 Czech Republic, guarantor, belonging to the institution)
Edition
Pavia, 20th International Symposium on Chironomidae, p. 88-94, 7 pp. 2018
Publisher
PAGEPRESS PUBL
Other information
Language
English
Type of outcome
Stať ve sborníku
Field of Study
10501 Hydrology
Country of publisher
Italy
Confidentiality degree
není předmětem státního či obchodního tajemství
Publication form
electronic version available online
References:
Impact factor
Impact factor: 1.606
RIV identification code
RIV/00216224:14310/18:00118711
Organization unit
Faculty of Science
ISSN
UT WoS
000453842300012
Keywords in English
Monopelopia tenuicalcar; Corynoneura sp.; predation; autecology; Tanypodinae; feeding; food webs; Sphagnum bog
Tags
Tags
International impact, Reviewed
Změněno: 10/11/2021 11:22, Mgr. Marie Šípková, DiS.
Abstract
V originále
Larvae of the subfamily Tanypodinae are in general regarded as predators. Actual predation has been observed directly in only a few Tanypodinae species, but their behaviour and mouthpart morphology suggest that all Tanypodinae ingest food in the same way and thus are all predators. This view is reflected in most autecological databases. There remains uncertainty for some species, most notably for Monopelopia tenuicalcar (Kieffer, 1918). The uncertainty stems from the lack of direct observations, while gut content analysis points to non-animal food sources. A laboratory experiment was carried out in which larvae of Corynoneura sp. were offered to M. tenuicalcar in a set of Petri dishes. All predator and prey larvae were collected from the same locality, where they were the most abundant members of early spring littoral community. M. tenuicalcar showed clear predatory behaviour. In most cases (84 out of 86) the predator larva pierced the larva of Corynoneura and sucked its inner body content instead of engulfing it. Only in two cases did the predator engulf the whole victim. In all cases the seizing and processing of the prey was the same, with the ingestion of the food carried out by strong sucking. Obviously, if the chitinous structures of the prey fit the mouth opening of the predator, it was engulfed completely, otherwise the prey larva's internal contents were just sucked out. A video of the exceptional case of engulfing the whole prey is available at https://youtu.be/o6-8dA1XDy0. The strategy of sucking out prey may explain why body remnants like head capsules or claws of prey have not been found in the guts of Monopelopia larvae. Instead, the guts of Monopelopia larvae that pierced Corynoneura were green as they were full of algae "stolen" from the intestines of the grazing victims. Piercing and sucking out prey by Tanypodinae may be more common than has been expected before. Due to this, gut content analysis seems to be unreliable for the determination of feeding strategy in Tanypodinae.
Links
| GA16-03881S, research and development project |
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