11. Contribution to the knowledge on the distribution of Recent free-living freshwater ostracods (Podocopida, Ostracoda, Crustacea) in SloveniaNataša Mori, Claude Meisch, 2012, izvirni znanstveni članek Povzetek: An updated checklist of Recent free-living freshwater ostracods (Podocopida, Ostracoda, Crustacea) from Slovenia together with new records is presented. The new checklist is based on both the records extracted from the literature and the sampling in the field carried out during the last decade. The present checklist comprises 61 species. However, the eastern part of Slovenia and the surface waters are underrepresented. It is expected that the number of species will increase in the future.
Ključne besede: species, fauna, freshwaters, groundwaters
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12. Mating behaviour and vibratory signalling in non-hearing cave crickets reflect primitive communication of EnsiferaNataša Stritih Peljhan, Andrej Čokl, 2012, izvirni znanstveni članek Povzetek: In Ensifera, the lack of well-supported phylogeny and the focus on acoustic communication of the terminal taxa hinders understanding of the evolutionary history of their signalling behaviour and the related sensory structures. For Rhaphidophoridae, the most relic of ensiferans following morphology-based phylogenies, the signalling modes are still unknown. Together with a detailed description of their mating process, we provide evidence on vibratory signalling for the sympatric European species Troglophilus neglectus and T. cavicola. Despite their temporal shift in reproduction, the species’ behaviours differ significantly. Signalling by abdominal vibration constitutes an obligatory part of courtship in T. neglectus, while it is absent in T. cavicola. Whole-body vibration is expressed after copulation in both species. While courtship signalling appears to stimulate females for mating, the function of post-copulation signals remains unclear. Mating and signalling of both species were found to take place in most cases on bark, and less frequently on other available substrates, like moss and rock. The signals’ frequency spectra were substrate dependent, but with the dominant peak always expressed below 120 Hz. On rock, the intensity of T. neglectus courtship signals was below the species’ physiological detection range, presumably constraining the evolution of such signalling in caves. The species’ behavioural divergence appears to reflect their divergent mating habitats, in and outside caves. We propose that short-range tremulation signalling in courtship, such as is expressed by T. neglectus, represents the primitive mode and context of mechanical signalling in Ensifera. The absence of high-frequency components in the signals may be related to the absence of the crista acoustica homologue (CAH) in the vibratory tibial organ of Rhaphidophoridae. This indirectly supports the hypothesis proposing that the CAH, as an evolutionary precursor of the ear, evolved in Ensifera along the (more) complex vibratory communication, also associated with signals of higher carrier frequency.
Ključne besede: insects, communication (biology), animal behaviour
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13. Preliminary multispecies test of a model for non-lethal estimation of metabolic activity in freshwater crayfishTatjana Simčič, Franja Pajk, Anton Brancelj, Al Vrezec, 2012, izvirni znanstveni članek Povzetek: We tested the applicability of electron transport system (ETS) derived from a single leg as a tool for non-lethal assessment of metabolic activity in freshwater crayfish. ETS activity of the whole body and of a leg was measured in four crayfish (Arthropoda, Crustacea, Decapoda) species: two European (Astacus astacus, Austropotamobius torrentium), and two North American (Orconectes limosus, Pacifastacus leniusculus). Mass scaling of whole body ETS activity (ETSwhole) and leg ETS activity (ETSleg) was not significantly different for the European A. astacus and the American O. limosus. Therefore common models were constructed and tested on the remaining two species. The ratio ETSwhole/ETSleg was significantly positively related to body mass. In the first model (model 1) ETSwhole was calculated from ETSleg multiplied by the ratio estimated from the known body mass. ETSwhole of A. torrentium was underestimated by this model, because they mature at smaller body size than the larger species. A direct relation between ETSleg and ETSwhole was therefore proposed as a general model (model 2), since they are correlated similarly in the studied species. The results show that model 2 is suitable for estimating the whole body ETS activity from leg ETS activity for the four investigated decapods.
Ključne besede: electron transport system (ETS) activity, crayfish, size scaling, methods (biology)
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14. HPC raziskovalna infrastruktura in storitve Središča ELIXIR-SI za ravnanje s podatkiBranimir Leskošek, Marko Vidak, Bojan Kverh, Polonca Ferk, 2024, druge monografije in druga zaključena dela Ključne besede: odprti podatki, odprta znanost, institucionalni repozitoriji, projekt Spoznaj, raziskovalna infrastruktura, raziskovalni podatki, uporabljanje podatkov
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15. Exploitation of insect vibrational signals reveals a new method of pest managementAnna Eriksson, Gianfranco Anfora, Andrea Lucchi, Francesco Lanzo, Meta Virant-Doberlet, Valerio Mazzoni, 2012, izvirni znanstveni članek Povzetek: Food production is considered to be the main source of human impact on the environment and the concerns about detrimental effects of pesticides on biodiversity and human health are likely to lead to an increasingly restricted use of chemicals in agriculture. Since the first successful field trial, pheromone based mating disruption enabled sustainable insect control, which resulted in reduced levels of pesticide use. Organic farming is one of the fastest growing segments of agriculture and with the continuously growing public concern about use of pesticides, the main remaining challenge in increasing the safety of the global food production is to identify appropriate alternative mating disruption approaches for the numerous insect pests that do not rely on chemical communication. In the present study, we show for the first time that effective mating disruption based on substrate-borne vibrational signals can be achieved in the field. When disruptive vibrational signals were applied to grapevine plants through a supporting wire, mating frequency of the leafhopper pest Scaphoideus titanus dropped to 9 % in semi-field conditions and to 4 % in a mature vineyard. The underlying mechanism of this environmentally friendly pest-control tactic is a masking of the vibrational signals used in mate recognition and location. Because vibrational communication is widespread in insects, mating disruption using substrate vibrations can transform many open field and greenhouse based farming systems.
Ključne besede: insects, ethology, pest management
Objavljeno v DiRROS: 12.03.2025; Ogledov: 26; Prenosov: 8
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16. Coumaphos affects food transfer between workers of honeybee Apis melliferaDanilo Bevk, Jasna Kralj, Andrej Čokl, 2012, izvirni znanstveni članek Povzetek: We investigated whether coumaphos, an organophosphate used to control the parasitic mite Varroa destructor, affects trophallaxis in honeybees. Donors were treated with coumaphos 1 h before experiments. In this, uncontaminated food was transferred from donors to recipients. The amount of food transferred was measured (a) directly by weighing food or (b) indirectly by the number of recipients that died due to insufficient trophallaxis. A large reduction in the amount of transferred food was observed when the donors received 5 μg of coumaphos 1 h prior to the experiment. High mortality was observed among the recipients that were fed by donors treated with 2 or 5 μg of coumaphos indicating insufficient food transfer. Demonstrated side effects of coumaphos on trophallaxis could reduce distribution of this systemic agent in the colony and decreases its efficacy. The described assays are feasible and could be a useful tool to test the effects of pesticides on trophallaxis.
Ključne besede: trophallaxis, social behaviour, food
Objavljeno v DiRROS: 12.03.2025; Ogledov: 13; Prenosov: 12
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17. Substrate vibrations during courtship in three Drosophila speciesValerio Mazzoni, Gianfranco Anfora, Meta Virant-Doberlet, 2013, izvirni znanstveni članek Povzetek: While a plethora of studies have focused on the role of visual, chemical and near-field airborne signals in courtship of Drosophila fruit flies, the existence of substrate-borne vibrational signals has been almost completely overlooked. Here we describe substrate vibrations generated during courtship in three species of the D. melanogaster group, from the allegedly mute species D. suzukii, its sister species D. biarmipes, and from D. melanogaster. In all species, we recorded several types of substrate vibrations which were generated by locomotion, abdominal vibrations and most likely through the activity of thoracic wing muscles. In D. melanogaster and D. suzukii, all substrate vibrations described in intact males were also recorded in males with amputated wings. Evidence suggests that vibrational signalling may be widespread among Drosophila species, and fruit flies may provide an ideal model to study various aspects of this widespread form of animal communication.
Ključne besede: animal communication, ethology, animal behaviour
Objavljeno v DiRROS: 12.03.2025; Ogledov: 25; Prenosov: 9
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18. Finding a largest-area triangle in a terrain in near-linear timeSergio Cabello, Arun Kumar Das, Sandip Das, Joydeep Mukherjee, 2025, izvirni znanstveni članek Povzetek: A terrain is an x-monotone polygon whose lower boundary is a single line segment. We present an algorithm to find in a terrain a triangle of largest area in O(nlogn) time, where n is the number of vertices defining the terrain. The best previous algorithm for this problem has a running time of O(n2).
Ključne besede: terrain, inclusion problem, geometric optimisation, hereditary segment tree
Objavljeno v DiRROS: 12.03.2025; Ogledov: 20; Prenosov: 8
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19. Nest survival of great tit Parus major in spatial and temporal gradientDejan Bordjan, Davorin Tome, 2013, izvirni znanstveni članek Povzetek: The aim of the study was to compare nest survival of Great Tit between different regions, altitudes and years to discern which has the highest influence. Temperature is known to be prominent for breeding parameters and it changes consistently with altitude. Our hypothesis was that altitude has greater influence on nest survival than the region and year. Breeding parameters were monitored with the use of nestboxes over a three year period at three altitude belts in two regions. The main factor influencing nesting success was modelled using daily survival rate in the program MARK. We gathered data from 104 first nesting attempts of which 26 failed. Although nest failure increased with altitude this was significant only for one region. There was significant difference in nest failure between the regions but not between the years. Modelling showed higher support in data for regions than for altitudes and years thus rejecting the hypothesis. Some possible reasons for such results are discussed.
Ključne besede: great tit, nest survival, altitude
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20. Orodja za delo z delotokiMarko Vidak, Bojan Kverh, Polonca Ferk, Branimir Leskošek, Maja Zagorščak, Nadja Francesca Nolte, Carissa Bleker, Marko Petek, Anže Županič, 2024, druge monografije in druga zaključena dela Ključne besede: odprti podatki, odprta znanost, delo z delotoki, projekt Spoznaj, okolje Galaxy, raziskovalni podatki, uporabljanje podatkov
Objavljeno v DiRROS: 12.03.2025; Ogledov: 24; Prenosov: 5
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