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22 results on '"Olli Peloniemi"'

2. Posters

Author

Stefan Björkman, Sofia Faes Morazzo, Renée Båge, Theodoros Ntallaris, Claudio Oliviero, Taehee Han, Eugeny Brusentsev, Olli Peloniemi, Olga Romanenkova, Mohammad Taghi Khoshniat, and Daria Nikanova

Subjects
medicine.medical_specialty, Endocrinology, Internal medicine, medicine, Weaning, Animal Science and Zoology, Biology, Biotechnology
Published
2019
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3. Book of Abstracts of the 69th Annual Meeting of the European Federation of Animal Science

Author

Stefan Björkman, Sabine Schmoelzl, Edyta Bauer, Alison Small, Albert Buitenhuis, Dimitar Nakov, Aaron Ingham, António Pedro Louro Martins, Claire Morgan-Davies, Carla Miranda, Cathy Dwyer, Claudio Oliviero, Anna Valros, Wendy Mercedes Rauw, Mona Lilian Vestbjerg Larsen, Taehee Han, Olli Peloniemi, Grum Gebreyesus Teklewold, Diana Brito de Barros, Dragica Salamon, Goutam Sahana, and Saman Lashkari

Subjects
0403 veterinary science, Mediterranean climate, Fishery, 0303 health sciences, 03 medical and health sciences, 040301 veterinary sciences, Pecten jacobaeus, Scallop, 04 agricultural and veterinary sciences, Biology, biology.organism_classification, 030304 developmental biology
Published
2018
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4. ABSTRACTS

Author

ALESSANDRO RICCI, Stefan Björkman, and Olli Peloniemi

Subjects
0403 veterinary science, Litter (animal), Endocrinology, Animal science, 040301 veterinary sciences, 0402 animal and dairy science, Animal Science and Zoology, 04 agricultural and veterinary sciences, Biology, 040201 dairy & animal science, Biotechnology
Published
2012
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6. Seasonal alterations in circadian melatonin rhythms of the European wild boar and domestic gilt

Author

Anssi Akseli Tast, Outi Hälli, Susanna Ahlström, Andersson Håkan, Robert Love, Olli Peloniemi, Production Animal Medicine, Departments of Faculty of Veterinary Medicine, and Animal Reproduction Science

Subjects
Europe, Male, Swine, Animals, Domestic, Photoperiod, education, Radioimmunoassay, Animals, Female, Seasons, Circadian Rhythm, Melatonin
Abstract

The aims of the present study were: 1) to determine if the European wild boar exhibits a circadian pattern of melatonin secretion under its natural light environment; 2) to compare this pattern with the pattern in domestic pigs reared under the light environment typical for domesticity; and 3) to determine if there are seasonal alterations in melatonin rhythms. Four to six young, pure-bred, European wild boars and four to six cross-bred (Yorkshire x Finnish Landrace) domestic gilts were sampled at 2-hr intervals for 48 hr at the spring/autumn equinoxes and summer/winter solstices. Samples were obtained via saphenous arterial catheters from the wild boars and via ear vein catheters from the domestic gilts. The ambient light intensity was recorded simultaneously with sampling both outdoors and indoors. Following ether extraction, the serum samples were assayed for melatonin using a commercial RIA (Bühlman). All the experimental animals exhibited a distinct circadian pattern in melatonin secretion, with high concentrations occurring during the scotophase. There was no difference in scotophase melatonin response between the wild boars and domestic gilts in any season in terms of mean melatonin concentration or peak value. The mean duration of increased melatonin secretion (more than two standard deviations over a mean photophase concentration) in 24 hr in the wild boars in spring, summer, autumn and winter, was 10, 6, 11 and 17 hr, respectively, and in the domestic gilts, 9, 8, 12 and 11 hr, respectively. These results demonstrate the existence of circadian rhythm in melatonin secretion in both the European wild boar and domestic pig. In both groups, the duration of secretion is subject to seasonal alterations. The results suggest no difference in photoperiodic-melatonin transduction between the European wild boar and domestic pig whether due to altered genotype or reduced light environment.

Published
2001

14. Yksilöhäkistä ryhmiin

Author

Outi Hälli, Mari Leena Heinonen, Camilla Munsterhjelm, Olli Peloniemi, and Anna Valros

17. Mammary System

Author

Guy-Pierre Martineau, Chantal Farmer, and Olli Peloniemi

20. Emakkosikalan pihatto-opas

Author

Mari Leena Heinonen, Olli Peloniemi, Anssi Akseli Tast, Juha Väinö Virolainen, Faculty of Veterinary Medicine, Eläinlääketieteellinen tiedekunta, and Veterinärmedicinska fakulteten

Subjects
sika, sikalat, hedelmällisyys, pihatot, emakot

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