magistrsko delo
Abstract
Lokomocija je kompleksna lastnost neposredno povezana z različnimi komponentami fitnesa. Na način lokomocije in morfološke lastnosti povezane z lokomocijo (npr. velikost telesa in dolžino okončin) vplivajo okoljski dejavniki. V podzemnem okolju si selekcijski dejavniki, ki vplivajo na evolucijo lokomocije, občasno nasprotujejo. V tej raziskavi smo preučevali medsebojni vpliv lokomocije, morfologije in okolja pri izbranih vrstah rodu Niphargus, ki živijo v različnih jamskih mikrohabitatih (jezerih, potokih). Nabrali smo osebke osmih vrst in jih aklimirali v jamskem laboratoriju Oddelka za biologijo. Izmerili smo njihove morfološke lastnosti, ki so domnevno povezane z lokomocijo, in na osnovi video posnetkov izdelali etograme. S pomočjo programov idTracker 2.1 in R 3.5.1 smo iz video posnetkov izračunali skupno dolžino opravljene poti, skupen čas gibanja ter maksimalno in povprečno hitrost. Z metodo glavnih komponent smo zmanjšali število morfoloških in vedenjskih spremenljivk in s paketom MCMCglmm v programu R testirali, kako se jezerske in potočne vrste razlikujejo po morfologiji in lokomociji. Njihove korelacije smo analizirali z regresijskimi analizami. Skušali smo tudi ugotoviti ali morfologija napoveduje tip lokomocije. Jezerske vrste so bile večje, bolj čokate in so imele daljše okončine, medtem ko so bile potočne vrste manjše, vitkejše, s krajšimi okončinami. Pokazali smo, da se potočne vrste gibajo ležeč na boku, s počasnim plazenjem ali skokovitim gibanjem, jezerske vrste pa hitreje in na različne načine. Ena od jezerskih vrst se je skoraj izključno gibala v pokončnem ali polpokončnem položaju, ki spominja na hojo.
Keywords
analiza lokomocije;slepe postranice;morfološke in lokomotorne lastnosti;potočni in jezerski ekomorfi;
Data
Language: |
Slovenian |
Year of publishing: |
2020 |
Typology: |
2.09 - Master's Thesis |
Organization: |
UL BF - Biotechnical Faculty |
Publisher: |
[T. Volk] |
UDC: |
595.371:591 |
COBISS: |
5325391
|
Views: |
629 |
Downloads: |
229 |
Average score: |
0 (0 votes) |
Metadata: |
|
Other data
Secondary language: |
English |
Secondary title: |
Locomotion analysis of selected Niphargus species |
Secondary abstract: |
Locomotion is a complex trait directly linked to various components of fitness. Environmental factors influence type of locomotion and morphological traits associated with locomotion such as body size and appendage length. In subterranean environment the selection factors which influence the evolution of locomotion are occasionally opposing. In this study, we examined the interactions between locomotion, morphology and environment of selected amphipod species of the genus Niphargus living in different cave microhabitats (i.e., lakes, streams). We collected individuals of eight species and acclimated them in the cave laboratory of the Department of Biology. We measured their morphological traits supposedly associated with locomotion and made ethograms based on video recordings. We used idTracker 2.1 and R 3.5.1. to calculate the total path length, movement time, maximum and average speed. With principal component analysis we reduced the number of morphological and behavioral variables. To test how lake and stream species differ in morphology and locomotion we used MCMCglmm package in R. The correlation between morphology and locomotion was analyzed with regression analysis. We sought to determine whether morphology predicts locomotion. Lake species were larger, stouter and had longer appendages, while stream species were smaller, slimmer with shorter appendages. We have shown that stream species move lying on their side with slow crawling and tail-flipping movements, whereas lake species move faster and display different locomotion modes. One of the lake species almost exclusively moved in an upright or semi-upright position reminiscent of walking. |
Secondary keywords: |
locomotion analysis;Niphargus;morphological and locomotory traits;stream and lake ecomorphs; |
Type (COBISS): |
Master's thesis/paper |
Study programme: |
0 |
Embargo end date (OpenAIRE): |
1970-01-01 |
Thesis comment: |
Univ. Ljubljana, Biotehniška fak. |
Pages: |
IX, 31, [8] f. |
ID: |
11440571 |