magistrsko delo
Janja Borštnar Lampreht (Avtor), Vesna Klokočovnik (Mentor)

Povzetek

Ličinke volkcev so zaradi sedentarnega načina življenja vezane na habitat, v katerem živijo in so podvržene številnim motnjam v habitatu. Proučevali smo vpliv motnje (kamnov različnih mas v lijaku) na dve vrsti volkcev, Euroleon nostras in Myrmeleon formicarius. Uporabili smo kamne z enako maso ličinke ter 12-krat, 35-krat in 50-krat večjo maso. Vpliv motnje smo proučevali pri stradanih in hranjenih ličinkah vsake vrste, pri čemer smo beležili maso in premer lijaka pred in po poskusu ter opazovali čas odziva in vedenje ličink ob prisotni motnji. Motnja (kamen) je vplivala na mase ličink, in sicer so ličinke v obeh tretiranih skupinah tekom poskusa, z izjemo hranjenih ličink E. nostras, izgubile maso. Podobno je bilo v primerjavi premera lijakov. Vse ličinke, z izjemo hranjenih E. nostras, so na koncu poskusa gradile manjše lijake. Čas odziva na motnjo je bil najkrajši pri E. nostras, podaljševal pa se je z maso kamna pri obeh vrstah. Medtem ko je na čas odziva pri E. nostras bolj vplivalo različno tretiranje ličink, je pri M. formicarius imela večji vpliva masa kamna. Vedenjski odziv je bil pri obeh vrstah podoben: kamne z enako maso so ličinke zalučale iz lijaka, medtem ko so večje kamne potiskale po pobočju do roba ali iz lijaka. Očitna razlika med vrstama je bila v premeščanju, in sicer so se pogosteje premeščale ličinke M. formicarius, medtem ko so bile E. nostras bolj sedentarne. Pri obeh vrstah so se pogosteje premeščale stradane ličinke. Med vrstama smo opazili nekatere razlike v odzivu na motnjo, kar pripisujemo vedenjski plastičnosti, kot prilagojenosti na habitat, v katerem ličinke živijo. Vsekakor pa motnje bolj prizadenejo ličinke, ki so v habitatu z manj plena.

Ključne besede

magistrska dela;volkci;Euroleon nostras;Myrmeleon formicarius;motnja v habitatu;stradani;hranjeni;vedenje;

Podatki

Jezik: Slovenski jezik
Leto izida:
Tipologija: 2.09 - Magistrsko delo
Organizacija: UM FNM - Fakulteta za naravoslovje in matematiko
Založnik: [J. Borštnar Lampreht]
UDK: 595.74:591.5(043.2)
COBISS: 205370883 Povezava se bo odprla v novem oknu
Št. ogledov: 9
Št. prenosov: 0
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: Behavioral response to habitat disturbance in two selected species of antlions (Neuroptera: Myrmeleontidae)
Sekundarni povzetek: Antlion larvae are sedentary predators, which makes them closely tied to their habitat and therefore they are more exposed to various environmental disturbances. We investigated the effect of disturbances (stones of different masses in the pit-fall trap) on two antlion species, Euroleon nostras and Myrmeleon formicarius. We used stones with the same mass as the larvae and stones of 12, 35, and 50 times the mass of the larvae. The effect of the disturbance was analyzed on starved and fed larvae of each species. We observed the mass of the larvae the diameter of the pit-fall traps before and after the experiment, the response time to the disturbance and the behavior of the larvae in the presence of the disturbance. The disturbance affected the weight of the larvae, with larvae in both treated groups losing weight during the experiment, except for the fed E. nostras. Similarly, all larvae, except for the fed E. nostras, built traps with a smaller diameter at the end of the experiment. The fed E. nostras had the shortest response time to a disturbance, but the response time increased with stone mass in both species. Different larval treatments had a stronger influence of M. formicarius. The behavioral response was similar in both species: larvae pushed stones of the same mass out of the trap, while larger stones were pushed up the slope to the edge or out of the trap. The apparent difference between the species was in relocation behavior, with M. formicarius larvae moving more frequently while E. nostras were more sedentary. In both species, the starved larvae relocated more often. We observed some differences between the species in their response to the disturbance, which we attribute to behavioral plasticity as an adaptation to the habitat where the larvae live. In addition, larvae in habitats with less prey are more affected by disturbances, whereas larvae with sufficient prey can cope better with minor disturbances in the habitat.
Sekundarne ključne besede: master theses;antlions;Euroleon nostras;Myrmeleon formicarius;habitat disturbance;feeding treatment;behavior;
Vrsta dela (COBISS): Magistrsko delo/naloga
Komentar na gradivo: Univ. v Mariboru, Fak. za naravoslovje in matematiko, Oddelek za biologijo
Strani: 40 f.
ID: 24505413