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Plants

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Fish Birds Reindeer Abstracts

Plants

Recently  my research has concentrated on metapopulation and conservation genetics of endangered species 
(see Metapopulation and conservation genetics-group)

Related publications:

 


Drosophila

In my research concerning on Drosophila I have studied sexual selection, mating system, sperm competion and species ecology in northern Drosophila virilis-group species. Recently we have concentrated on localizing QTL:s affecting male secondary sexual charactres.  See also the homepage of our Behavioral Genetics Drosophila Research Group.

Publications:

Closely related are studies about evolution of mating system in an Australian lekking Drosophila species, Drosophila mycetophaga.

Publications:


Fish

Research on fish have been conducted mainly with Teppo Vehanen. The aim of is this study is to estimate the most important factors affecting the success of predatory salmonid stockings and also the effcets of stockings on the numbers of prey fish populations.

Publications:

  • The effect of size, fin erosion, body silvering and precocious maturation on survival to adulthood in Carlin tagged Baltic salmon (Salmo salar L.). -Ann. Zool. Fennici 30: 277-285 (Vehanen, T., Aspi, J. & Pasanen, P.) (1993)

  • Classification of northern Finnish lakes and the suitability for the stocking for brown trout (Salmo trutta (L)) m. lacustris). -Fisheries Research 27: 37-49 (Vehanen, T. & Aspi, J.) (1996)

  • Dispersion of stocked brown trout, Salmo trutta m. lacustris, and landlocked salmon, Salmo salar, from stocking sites in Lake Oulujärvi, Finland. -Fisheries Management and Ecology 5: 177-188 (Vehanen, T., Hyvärinen, P. & Aspi, J.) (1998)

  • Intercohort competition causes spatial segregation among size classes of brown trout. -Journal of Fish Biology 55: 35-46. (Vehanen, T., Mäki-Petäys, A., Aspi, J. & Muotka, T.) (1999)

Projects going on:

  • Genetic composition of brown trout stocks in Oulankajoki river system at present and in past. The secrets of old scales revealed by DNA-techiniques.

Releted papers:

  • Molecular genetics of Nordic fish populations. -In: Proceedings of the meeting 'Molecular genetics of Nordic fish populations'. Ed: Aspi, J. Oulanka Reports 17: 1. (1997)


Birds

Mainly community ecology of birds together with Mikko Mönnkönen. Publications:

  • Sampling error in measuring temporal density variability in animal populations and communities . -Ann. Zool. Fenn. 34:  47-57 (Mönkkönen, M. & Aspi, J.)


Reindeer

My early career: reindeer pasture-ecology, lichen autecology, effects of blood-sucking insects on reindeer behaviour.

Publications::

  • Effects of winter grazing by reindeer on vegetation. -Oikos 40: 337 343. (Helle, T. & Aspi, J.) (1983)

  • Does herd formation reduce insect harassement among reindeer: field experiment with animal traps. -Acta Zool. Fennica 175: 129 131 (Helle, T. & Aspi, J.) (1983)

  • Prescribed burning from the viewpoint of reindeer husbandry. First Scand. Symp. on Research on Multiple Use Forestry. -Comm. Inst. Forest. Fenn. 120: 97 101 (Helle, T. & Aspi, J.) (1984)

  • The qrowth rate of Cladonia rangiferina and C. mitis in relation to forest characteristics in northeastern Finland. -Rangifer 1: 2 5 (Helle, T., Aspi, J. & Tarvainen. L.) (1984)

  • Do sandy patches help reindeer against insects? -Rep. Kevo Subarctic. Res. Station 19: 57 62 (Helle, T. & Aspi, J.) (1984)

  • Size related changes in winter condition of male calves in reindeer. Rangifer 7 (1): 2 11 (Helle, T., Pulliainen, E. & Aspi, J.) (1987)

  • Effects of stand characteristics on reindeer lichens and range used by semi-domestic reindeer. -Rangifer 3: 107-114 (Helle, T., Aspi, J. & Kilpelä, S-S.) (1990)

  • Strategies to avoid biting flies by reindeer: field experiment with silhouette traps. -Ann. Zool. Fennici 29: 69-74. (Helle, T., Aspi, J., Lempa, K. & Taskinen, E.) (1992)


ABSTRACTS

1987

1. Size, size dimorphism and relative antler size in reindeer and caribou (genus Rangifer). 12th Meeting of the Scandinavian Association of Geneticists. Oulu, Finland. June 2-4, 1986. -Hereditas 106:1. (Aspi, J. & Helle, T.)

2. Facultative sex-ratio manipulation in reindeer ? Founding Congress of European Society for Evolutionary Biology. Basel, Switzerland, 26-30 August 1987 (Aspi, J. & Helle, T.)

3. Variation in the male courtship sounds within and between the species of Drosophila virilis group. Tenth European Drosophila Research Conference. Barcelona, Spain (Aspi, J., Hoikkala, A. & Lumme, J.)

1988

4. Effects of stand characteristics on reindeer lichens and range use by semi-domestic reindeer. 5th Reindeer/Caribou Symp. 18-22.8. 1988. Arvidsjaur. Sweden (Helle, T. & Aspi, J.)

1989

5. Field and laboratory measurements of sexual selection in Drosophila littoralis. Abstract. 22nd Meeting of the Population Genetics Group, 4-6.1. 1989. Leicester, UK (Aspi, J. Hoikkala, A. & Helle, P.)

6. Natural selection in males of Drosophila montana and Drosophila littoralis. Abstract. 11th European Drosophila Research Conference, 4-7. September, Marseille, France (Aspi, J. & Lumme, J.)

1991

7. Multiple mating, sperm utilization and sperm precedence in Drosophila littoralis and D. montana. 21nd Meeting of the Population Genetics Group, 3-5.1.1991. Nottingham, UK (Aspi, J.)

8. Measuring heritability of copulatory success in Drosophila littoralis and D. montana. 22nd Meeting of the Population Genetics Group. 20-22.12.1991. Manchester, UK (Aspi, J.)

1992

9. Reproductive ecology of the boreal Drosophila virilis-group species. Drosophila Population Biology. 21.9-24.9. 1992. Leeds, UK (Aspi, J.)

10. Male songs and sexual selection in Drosophila montana. XXIV International Ethological Conference, August 10-17, Honolulu, Hawaii (Hoikkala, A. & Aspi, J.)

11. A phytoseid mite, Paragarmania mali, associated with drosophilids. Proceedings of EURAAC Symposium, 31. August-4. September. 1992. Brunica, Poland (Lehtinen, P. & Aspi, J.)

12. Auditory cues in species recognition and sexual selection in boreal Drosophila virilis group species. The Evolution and Design of Animal Signalling Systems. The Royal Society. London, UK. (Hoikkala, A., Liimatainen, J. & Aspi, J).

1995

13. Male songs and sexual selection in Drosophila montana. XXIV International Ethological Conference, August 10-17, Honolulu, Hawaii (Hoikkala, A. & Aspi, J.)

1998

14. Evolution of heterospecific attraction in landscape perspective. - Ostrich Journal of African Ornithology 69(3-4), 22nd International Ornithological Congress Durban 16-22 August 1998. (Mönkkönen, M., Forsman, J. T., Aspi, J., Härdling, R. & Tuomi, J)

15. Genes affecting the differences in male courtship song between D. virilis and D. littoralis. 7th European Symposium on Drosophila Neurobiology. University of Warwick, September 6-10, 1998. (Päällysaho, S., Hoikkala, A. & Aspi, J.)

16. Estimating the number and location of genes affecting male courtship song characters in Drosophila montana 7th European Symposium on Drosophila Neurobiology. University of Warwick, September 6-10, 1998. (Aspi, J., Parkkinen, K. & Päällysaho, S.).

16. Estimating the number and location of genes affecting male courtship song characters in Drosophila montana 7th European Symposium on Drosophila Neurobiology. University of Warwick, September 6-10, 1998. (Aspi, J., Parkkinen, K. & Päällysaho, S.).

2001

17. Inbreeding and outbreeding depression in male courtship song characters in Drosophila montana. EDRC 2001. 17th European Drosophila Research Conference in Edinburgh (UK) September 1-5 2001. (Aspi, J.)

2002

18. Metapopulation genetics and migration in an endangered plant species, Silene tatarica. Society for Conservation Biology 16th Annual Meeting, July 14-July 19 2002 (Tero, N., Aspi, J., Siikamäki, P., Jäkäläniemi A. & Tuomi, J.).

19. Regional persistence of plants in heterogeneous environments. Kasvitieteen päivät, Oulu 16-17.5.2002. (Aspi, J., Siikamäki, P., Tuomi, J, Jäkäläniemi, A., Kilpiä, A. & Tero, N.)

20. Metapopulation genetics and migration in an endangered plant species, Silene tatarica. Kasvitieteen päivät, Oulu 16-17.5.2002. (Tero, N., Aspi, J., Siikamäki, P., Jäkäläniemi A. & Tuomi, J.).

2003

21. Biometrical and QTL analysis of variation in male courtship song characters in Drosophila virilis. (Huttunen, S & Aspi, J.). IXth Congress of the European Society for Evolutionary Biology. University of Leeds, UK 18-24.

22. Local population structure in an endangered plant species, Silene tatarica (Tero, N & Aspi, J.). IXth Congress of the European Society for Evolutionary Biology. University of Leeds, UK 18-24.