{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T12:56:01Z","timestamp":1782305761082,"version":"3.54.5"},"reference-count":28,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2003,9,10]],"date-time":"2003-09-10T00:00:00Z","timestamp":1063152000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Exp. Zool."],"published-print":{"date-parts":[[2003,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The raccoon dog (<jats:italic>Nyctereutes procyonoides<\/jats:italic>, Canidae, Carnivora) is a middle\u2010sized omnivore with excessive autumnal fattening and winter sleep. We studied adaptations of the species to boreal climate and photoperiod by following the plasma reproductive and thyroid hormone concentrations of farm\u2010bred raccoon dogs (n=32) for 12 months. On August 16, 2000, and February 8, 2001, half of the raccoon dogs received continuous\u2010release melatonin implants (the MEL group). The other half was sham\u2010operated (the SHAM group). Between November 27, 2000, and January 25, 2001, half of the animals of both groups were fasted. The plasma testosterone concentrations of the MEL males peaked in February, a month earlier than in the SHAM males. Autumnal melatonin treatment also advanced the gestation period reflected by the plasma progesterone concentrations by seven weeks. Food deprivation in winter seems to accentuate the sex steroid response during the mating as the fasted males had higher testosterone concentrations than the fed males in February and March. <jats:italic>J. Exp. Zool. 180\u2013187, 2003<\/jats:italic>. \u00a9 2003 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/jez.a.10299","type":"journal-article","created":{"date-parts":[[2003,9,11]],"date-time":"2003-09-11T13:24:02Z","timestamp":1063286642000},"page":"180-187","source":"Crossref","is-referenced-by-count":17,"title":["Seasonal reproductive endocrine profile of the raccoon dog (<i>Nyctereutes procyonoides<\/i>)\u2014effects of melatonin and food deprivation"],"prefix":"10.1002","volume":"299A","author":[{"given":"Juha","family":"Asikainen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne\u2010Mari","family":"Mustonen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heikki","family":"Hyv\u00e4rinen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Petteri","family":"Nieminen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2003,9,10]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1051\/rnd:19800114"},{"key":"e_1_2_1_3_1","volume-title":"Melatonin and the mammalian pineal gland","author":"Arendt J","year":"1995"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1439-0396.2002.00389.x"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1152\/ajpendo.1979.237.3.E227"},{"key":"e_1_2_1_6_1","first-page":"330","article-title":"Raccoon dog: the structure and growth phases of the pelt","volume":"15","author":"Blomstedt L","year":"1991","journal-title":"Scientifur"},{"key":"e_1_2_1_7_1","unstructured":"Council of the European Union.1993.Council directive 93\/119\/EC of 22 December 1993 on the protection of animals at the time of slaughter and killing 12 pp."},{"key":"e_1_2_1_8_1","volume-title":"Pelztieratlas","author":"Dathe H","year":"1986"},{"key":"e_1_2_1_9_1","volume-title":"Animal Physiology: mechanisms and adaptations","author":"Eckert R","year":"1988"},{"key":"e_1_2_1_10_1","doi-asserted-by":"publisher","DOI":"10.1530\/jrf.0.0890351"},{"key":"e_1_2_1_11_1","doi-asserted-by":"publisher","DOI":"10.1530\/jrf.0.0880383"},{"key":"e_1_2_1_12_1","unstructured":"KauhalaK.1992.Ecological characteristics of the raccoon dog in Finland. 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