Photoperiod Differentially Affects Immune Function and Reproduction in Collared Lemmings (Dicrostonyx groenlandicus)
Many nontropical rodent species experience predictable annual variation in resource availability and environmental conditions. Individuals of many animal species engage in energetically expensive processes such as breeding during the spring and summer but bias investment toward processes that promot...
Published in: | Journal of Biological Rhythms |
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Online Access: | http://dx.doi.org/10.1177/0748730406292444 https://journals.sagepub.com/doi/pdf/10.1177/0748730406292444 |
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crsagepubl:10.1177/0748730406292444 2024-10-06T13:48:11+00:00 Photoperiod Differentially Affects Immune Function and Reproduction in Collared Lemmings (Dicrostonyx groenlandicus) Weil, Zachary M. Martin, Lynn B. Nelson, Randy J. 2006 http://dx.doi.org/10.1177/0748730406292444 https://journals.sagepub.com/doi/pdf/10.1177/0748730406292444 en eng SAGE Publications https://journals.sagepub.com/page/policies/text-and-data-mining-license Journal of Biological Rhythms volume 21, issue 5, page 384-393 ISSN 0748-7304 1552-4531 journal-article 2006 crsagepubl https://doi.org/10.1177/0748730406292444 2024-09-10T04:26:44Z Many nontropical rodent species experience predictable annual variation in resource availability and environmental conditions. Individuals of many animal species engage in energetically expensive processes such as breeding during the spring and summer but bias investment toward processes that promote survival such as immune function during the winter. Generally, the suite of responses associated with the changing seasons can be induced by manipulating day length (photoperiod). Collared lemmings ( Dicrostonyx groenlandicus) are arvicoline rodents that inhabit parts of northern Canada and Greenland. Despite the extreme conditions of winter in their native habitat, these lemmings routinely breed during the winter. In the laboratory, collared lemmings have divergent responses to photoperiod relative to other seasonally breeding rodents; short day lengths can stimulate, rather than inhibit, the reproductive system. Male and female collared lemmings were maintained for 11 weeks in 1 of 3 photoperiods (LD 22:2, LD 16:8, or LD 8:16) that induce markedly different phenotypes. Following photoperiod treatment, cell-mediated immune function as assessed by delayed-type hypersensitivity reactions was elevated in lemmings housed in LD 16:8 and LD 8:16 relative to LD 22:2. However, antibody production to a novel antigen was unaffected by photoperiod. Exposure to LD 8:16 induced weight gain, molt to a winter pelage, and in contrast to previous studies, regression of the male, but not the female, reproductive tract. In conclusion, these data indicate that components of immune function among collared lemmings are responsive to changes in day length. Article in Journal/Newspaper Dicrostonyx groenlandicus Greenland SAGE Publications Canada Greenland Journal of Biological Rhythms 21 5 384 393 |
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description |
Many nontropical rodent species experience predictable annual variation in resource availability and environmental conditions. Individuals of many animal species engage in energetically expensive processes such as breeding during the spring and summer but bias investment toward processes that promote survival such as immune function during the winter. Generally, the suite of responses associated with the changing seasons can be induced by manipulating day length (photoperiod). Collared lemmings ( Dicrostonyx groenlandicus) are arvicoline rodents that inhabit parts of northern Canada and Greenland. Despite the extreme conditions of winter in their native habitat, these lemmings routinely breed during the winter. In the laboratory, collared lemmings have divergent responses to photoperiod relative to other seasonally breeding rodents; short day lengths can stimulate, rather than inhibit, the reproductive system. Male and female collared lemmings were maintained for 11 weeks in 1 of 3 photoperiods (LD 22:2, LD 16:8, or LD 8:16) that induce markedly different phenotypes. Following photoperiod treatment, cell-mediated immune function as assessed by delayed-type hypersensitivity reactions was elevated in lemmings housed in LD 16:8 and LD 8:16 relative to LD 22:2. However, antibody production to a novel antigen was unaffected by photoperiod. Exposure to LD 8:16 induced weight gain, molt to a winter pelage, and in contrast to previous studies, regression of the male, but not the female, reproductive tract. In conclusion, these data indicate that components of immune function among collared lemmings are responsive to changes in day length. |
format |
Article in Journal/Newspaper |
author |
Weil, Zachary M. Martin, Lynn B. Nelson, Randy J. |
spellingShingle |
Weil, Zachary M. Martin, Lynn B. Nelson, Randy J. Photoperiod Differentially Affects Immune Function and Reproduction in Collared Lemmings (Dicrostonyx groenlandicus) |
author_facet |
Weil, Zachary M. Martin, Lynn B. Nelson, Randy J. |
author_sort |
Weil, Zachary M. |
title |
Photoperiod Differentially Affects Immune Function and Reproduction in Collared Lemmings (Dicrostonyx groenlandicus) |
title_short |
Photoperiod Differentially Affects Immune Function and Reproduction in Collared Lemmings (Dicrostonyx groenlandicus) |
title_full |
Photoperiod Differentially Affects Immune Function and Reproduction in Collared Lemmings (Dicrostonyx groenlandicus) |
title_fullStr |
Photoperiod Differentially Affects Immune Function and Reproduction in Collared Lemmings (Dicrostonyx groenlandicus) |
title_full_unstemmed |
Photoperiod Differentially Affects Immune Function and Reproduction in Collared Lemmings (Dicrostonyx groenlandicus) |
title_sort |
photoperiod differentially affects immune function and reproduction in collared lemmings (dicrostonyx groenlandicus) |
publisher |
SAGE Publications |
publishDate |
2006 |
url |
http://dx.doi.org/10.1177/0748730406292444 https://journals.sagepub.com/doi/pdf/10.1177/0748730406292444 |
geographic |
Canada Greenland |
geographic_facet |
Canada Greenland |
genre |
Dicrostonyx groenlandicus Greenland |
genre_facet |
Dicrostonyx groenlandicus Greenland |
op_source |
Journal of Biological Rhythms volume 21, issue 5, page 384-393 ISSN 0748-7304 1552-4531 |
op_rights |
https://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0748730406292444 |
container_title |
Journal of Biological Rhythms |
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21 |
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5 |
container_start_page |
384 |
op_container_end_page |
393 |
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1812176332915736576 |