Tick burden in neonatal roe deer (Capreolus capreolus): the role of age, weight, hind foot length, and vegetation and habitat on bed sites
This thesis deal with tick burden on roe deer (Capreolus capreolus) fawns, in relation to age, weight, hind foot length, and as well as to vegetation and habitat on bed sites. Roe deer fawns (N = 25) were captured from May 27 to June 27. Samples of ticks were collected and tick burden were estimated...
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| Formato: | Second cycle, A2E |
| Lenguaje: | sueco Inglés |
| Publicado: |
2014
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| Acceso en línea: | https://stud.epsilon.slu.se/6529/ |
| _version_ | 1855571026903040000 |
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| author | Svensson, Evelina |
| author_browse | Svensson, Evelina |
| author_facet | Svensson, Evelina |
| author_sort | Svensson, Evelina |
| collection | Epsilon Archive for Student Projects |
| description | This thesis deal with tick burden on roe deer (Capreolus capreolus) fawns, in relation to age, weight, hind foot length, and as well as to vegetation and habitat on bed sites. Roe deer fawns (N = 25) were captured from May 27 to June 27. Samples of ticks were collected and tick burden were estimated. Of all sampled ticks the nymphs and adults were Ixodes ricinus, while the larvae were not identified. 4.4 % of the sampled ticks were larvae, 55.0 % nymphs, 26.8 % adult females, and 13.8 % adult males. The average tick burden were rather small (14 ticks per fawn), with individual variation from 0 to 80 ticks per fawn. Tick burden were positively correlated with age, weight and hind foot length. However, tick burden did not have any effect on weight gain or growth rate. There was a significant difference in tick burden on roe deer neonatal in the heavier weight group between vegetation types, where the fawns that had been captured in short grass, herbs, blueberry shrubs, and moss in closed habitats had a higher tick burden than fawns that was captured in high grass and herbs in open habitats. This was consistent with the result from sampling ticks on cloth drags, where the highest amount of ticks was found among short grass, herbs and moss with a mean of 69.1 ticks/100m², followed by blueberry shrubs and moss with 44.9 ticks/100m² and high grass and herbs with a mean of 6.6 ticks/100m². The highest prevalence of I. ricinus was found on roe deer fawns that were more frequently located in coniferous forest, while the lowest prevalence was found on the fawns that were more frequently located in farmlands. The analysis of the collected ticks’ shows that the presence of nymph, adult female, and adult male ticks on roe deer fawns is dependent of the habitats the fawn has been in, but that presence of larvae is independent of habitat. Adult tick burden was higher on fawns captured in closed habitats then on fawns in open habitats. Overall, the tick burden was relatively low and did not have any visible effect on the roe deer fawns during this study period. Since age and tick burden was positively correlated, we cannot reject the risk that tick burden will reach a level that might have a negative effect on weight gain and/or growth rate as the fawns’ ages. To examine this further, the fawns should therefore be followed for a longer period of time. |
| format | Second cycle, A2E |
| id | RepoSLU6529 |
| institution | Swedish University of Agricultural Sciences |
| language | Swedish Inglés |
| publishDate | 2014 |
| publishDateSort | 2014 |
| record_format | eprints |
| spelling | RepoSLU65292014-03-20T15:17:08Z https://stud.epsilon.slu.se/6529/ Tick burden in neonatal roe deer (Capreolus capreolus): the role of age, weight, hind foot length, and vegetation and habitat on bed sites Svensson, Evelina Animal ecology This thesis deal with tick burden on roe deer (Capreolus capreolus) fawns, in relation to age, weight, hind foot length, and as well as to vegetation and habitat on bed sites. Roe deer fawns (N = 25) were captured from May 27 to June 27. Samples of ticks were collected and tick burden were estimated. Of all sampled ticks the nymphs and adults were Ixodes ricinus, while the larvae were not identified. 4.4 % of the sampled ticks were larvae, 55.0 % nymphs, 26.8 % adult females, and 13.8 % adult males. The average tick burden were rather small (14 ticks per fawn), with individual variation from 0 to 80 ticks per fawn. Tick burden were positively correlated with age, weight and hind foot length. However, tick burden did not have any effect on weight gain or growth rate. There was a significant difference in tick burden on roe deer neonatal in the heavier weight group between vegetation types, where the fawns that had been captured in short grass, herbs, blueberry shrubs, and moss in closed habitats had a higher tick burden than fawns that was captured in high grass and herbs in open habitats. This was consistent with the result from sampling ticks on cloth drags, where the highest amount of ticks was found among short grass, herbs and moss with a mean of 69.1 ticks/100m², followed by blueberry shrubs and moss with 44.9 ticks/100m² and high grass and herbs with a mean of 6.6 ticks/100m². The highest prevalence of I. ricinus was found on roe deer fawns that were more frequently located in coniferous forest, while the lowest prevalence was found on the fawns that were more frequently located in farmlands. The analysis of the collected ticks’ shows that the presence of nymph, adult female, and adult male ticks on roe deer fawns is dependent of the habitats the fawn has been in, but that presence of larvae is independent of habitat. Adult tick burden was higher on fawns captured in closed habitats then on fawns in open habitats. Overall, the tick burden was relatively low and did not have any visible effect on the roe deer fawns during this study period. Since age and tick burden was positively correlated, we cannot reject the risk that tick burden will reach a level that might have a negative effect on weight gain and/or growth rate as the fawns’ ages. To examine this further, the fawns should therefore be followed for a longer period of time. Detta examensarbete tar upp fästingbördan hos rådjurskid (Capreolus capreolus), i förhållande till ålder, vikt, haslängd samt vegetation och habitat på legorna. Tjugofem rådjurskid fångades mellan den 27 maj och 27 juni. Ett urval av fästingar samlades in och antal fästingar uppskattades. Av alla insamlade fästingar var nymferna och adulterna av arten Ixodes ricinus medan larverna inte var artbestämda. 4.4 % av de insamlade fästingarna var larver, 55.0 % nymfer, 26.8 % adulta honor och 13.8 % adulta hanar. Det genomsnittliga antalet fästingar per individ var relativt få (14 fästingar per kid), med en individuell variation på 0 till 80 fästingar. Det visade sig att antalet fästingar var positivt korrelerade med ålder, vikt och haslängd. Däremot hade antalet fästingar inte någon inverkan på viktökning eller tillväxt. Det fanns en signifikant skillnad i antalet fästingar hos rådjurskid i den tyngre viktgruppen mellan vegetationstyper, där kid som hade fångats i kort gräs, örter, blåbärsris och mossa i slutet habitat hade ett högre antal fästingar än kid som fångats i högt gräs och örter i öppet habitat. Detta stämde överens med resultatet från fästingflaggningen, där det högsta antalet fästingarna hittades bland kort gräs, örter och mossa med ett medelvärde på 69,1 fästingar/100m², följt av blåbärsris och mossa med 44,9 fästingar/100m² och högt gräs och örter med 6.6 fästingar/100m². Den högsta förekomsten av I. ricinus hittades på kid som i större utsträckning vistats i barrskog, medan den lägsta förekomsten hittades på kid som oftare befann sig i jordbruksmarker. Analysen av de insamlade fästingarna visar att förekomsten av nymfer, adulta honor och adulta hanar bland fästingarna på kiden är beroende av de habitat kiden har befunnit sig i, men att förekomsten av larver är oberoende av habitat. Antalet adulta fästingar var högre på kid som fångats i slutet habitat än på kid i öppna habitat. Överlag var fästingbördan relativt låg och har inte haft någon synlig effekt på rådjurskiden under denna tudieperiod. Eftersom antal fästingar var positivt korrelerade med kidens ålder, kan vi inte bortse från risken att antalet fästingar kan nå en nivå som skulle kunna ha en negativ effekt på viktökning och/eller tillväxt. För att undersöka detta vidare bör kiden följas under en längre tidsperiod. 2014-03-20 Second cycle, A2E NonPeerReviewed application/pdf sv https://stud.epsilon.slu.se/6529/7/svensson_e_140320.pdf Svensson, Evelina, 2014. Tick burden in neonatal roe deer (Capreolus capreolus): the role of age, weight, hind foot length, and vegetation and habitat on bed sites. Second cycle, A2E. Umeå: (S) > Dept. of Wildlife, Fish and Environmental Studies <https://stud.epsilon.slu.se/view/divisions/OID-251.html> urn:nbn:se:slu:epsilon-s-3129 eng |
| spellingShingle | Animal ecology Svensson, Evelina Tick burden in neonatal roe deer (Capreolus capreolus): the role of age, weight, hind foot length, and vegetation and habitat on bed sites |
| title | Tick burden in neonatal roe deer (Capreolus capreolus): the role of age, weight, hind foot length, and vegetation and habitat on bed sites |
| title_full | Tick burden in neonatal roe deer (Capreolus capreolus): the role of age, weight, hind foot length, and vegetation and habitat on bed sites |
| title_fullStr | Tick burden in neonatal roe deer (Capreolus capreolus): the role of age, weight, hind foot length, and vegetation and habitat on bed sites |
| title_full_unstemmed | Tick burden in neonatal roe deer (Capreolus capreolus): the role of age, weight, hind foot length, and vegetation and habitat on bed sites |
| title_short | Tick burden in neonatal roe deer (Capreolus capreolus): the role of age, weight, hind foot length, and vegetation and habitat on bed sites |
| title_sort | tick burden in neonatal roe deer (capreolus capreolus): the role of age, weight, hind foot length, and vegetation and habitat on bed sites |
| topic | Animal ecology |
| url | https://stud.epsilon.slu.se/6529/ https://stud.epsilon.slu.se/6529/ |