magistrsko delo
Povzetek
V nalogi podrobneje predstavimo spolno biologije črne vdove, Latrodectus tredecimguttatus, ki živi na Balkanu, ter preverjamo prisotnost nekaterih za rod značilnih paritvenih vedenj. Vsa vedenja smo tudi kvantificirali. Prav tako smo iskali individualne razlike v agresivnosti tako pri samcih kot samicah in povezave med agresivnostjo samice do plena in spolnim kanibalizmom. Poskusili smo tudi najti podporo za hipotezo »prelite samičine agresije«. Vse našteto smo preverjali v standardiziranih vedenjskih poskusih za osebnost posameznega spola ter na koncu v paritvenih poskusih. Vrsti smo pripisali tri zanjo še neznana vedenja. Ta so odlaganje samčeve pajčevine na samičino mrežo, uničevanje samičine mreže ter oralni spolni kontakt. Pokazali smo, da so individualne razlike v agresivnosti prisotne pri samcih, a ne samicah, ter da bistveno vplivajo na pojavnost spolnega kanibalizma. Agresivnejši samci so se parili prej, pogosteje ter dlje, agresivnost pa je povezana tudi z aktivnostjo samcev. Samice so pogosteje napadale manj aktivne samce. Po pričakovanjih hipoteze prelivanja agresivnosti nismo potrdili, za pojavnost spolnega kanibalizma pa predlagamo samičino kontroliranje paritev, bodisi zaradi preprečevanja monopolizacije ali v prid genetske heterogenosti zaroda.
Ključne besede
črna vdova;spolni kanibalizem;vedenje;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2018 |
Tipologija: |
2.09 - Magistrsko delo |
Organizacija: |
UL BF - Biotehniška fakulteta |
Založnik: |
[R. Golobinek] |
UDK: |
595.44(043.2) |
COBISS: |
4927311
|
Št. ogledov: |
726 |
Št. prenosov: |
186 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Mating biology of a black widow spider |
Sekundarni povzetek: |
In this work, we presented a detailed description of the mating biology of the blackwidow Latrodectus tredecimguttatus, native to the Balkans, and invesigeted some of the genus -specific mating behaviours . All observed behaviours were also quantified. Additionally, we searched for individual differences in aggression in both males and females and looked for a connection between female aggression towards prey and sexual cannibalism. We attempted to find support for the “aggressive spill over hypothesis”. All of the above was tested in behavioural personality trials, standardized for each sex and finally ending in a mating trial. We described three so far unobserved behaviours for this species, includingmale silk deposition on the female web, destruction of the female web by the male and oral sexual encounters. We showed that individual differences in aggression are indeed present in males, but not females, and that they do have an impact on the occurrence of sexual cannibalism. More aggressive males mated sooner, more often, longer and were generally more active. Females also attacked less active males more often. As expected, we found no evidence supporting the “aggressive spill over hypothesis”, which suggests that sexual cannibalism is the females’ way of controlling copulations, whether it be to prevent monopolization or to promote heterogeneity in offspring. |
Sekundarne ključne besede: |
black widow;sexual dimorphism;behaviour; |
Vrsta dela (COBISS): |
Magistrsko delo/naloga |
Študijski program: |
0 |
Konec prepovedi (OpenAIRE): |
1970-01-01 |
Komentar na gradivo: |
Univ. Ljubljana, Biotehniška fak. |
Strani: |
X, 44, [1] f. |
ID: |
10962175 |