PMID- 31019542
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220408
IS  - 1742-9994 (Print)
IS  - 1742-9994 (Electronic)
IS  - 1742-9994 (Linking)
VI  - 16
DP  - 2019
TI  - Photoresponsiveness affects life history traits but not oxidative status in a 
      seasonal rodent.
PG  - 11
LID - 10.1186/s12983-019-0311-3 [doi]
LID - 11
AB  - BACKGROUND: Shortening photoperiod triggers seasonal adjustments like cessation 
      of reproduction, molting and heterothermy. However there is a considerable 
      among-individual variation in photoresponsiveness within one population. Although 
      seasonal adjustments are considered beneficial to winter survival, and natural 
      selection should favor the individuals responding to changes in photoperiod 
      (responders), the phenotype non-responding to changes in day length is maintained 
      in population. Assuming the same resource availability for both phenotypes which 
      differ in strategy of winter survival, we hypothesized that they should differ in 
      life history traits. To test this we compared reproductive traits of two extreme 
      phenotypes of Siberian hamster Phodopus sungorus - responding and non-responding 
      to seasonal changes in photoperiod. We bred individuals of the same phenotype and 
      measured time to first parturition, time interval between litters, offspring body 
      mass 3, 10 and 18 days after birth and their growth rate. We also analyzed 
      nest-building behavior. Additionally, we estimated the correlation between 
      reproduction, and basal metabolic rate (BMR) and oxidative status in both 
      phenotypes to infer about the effect of reproductive output on future investments 
      in somatic maintenance. RESULTS: Prior to reproduction responding individuals 
      were smaller than non-responding ones, but this difference disappeared after 
      reproduction. Responding pairs commenced breeding later than non-responding ones 
      but there was no difference in time interval between consecutive litters. 
      Responders delivered smaller offspring than non-responders and more out of 
      responding individuals built the nest during winter than non-responding ones. 
      Reproduction did not affect future investments in somatic maintenance. Phenotypes 
      did not differ in BMR and oxidative status after reproduction. However, 
      concentration of reactive oxygen metabolites (ROM) was highest in responding 
      males, and biological antioxidant potential (BAP) was higher in males of both 
      phenotypes than in females. CONCLUSIONS: Delayed breeding in responding Siberian 
      hamsters and high ROM concentration in male responders support our hypothesis 
      that differences in adjustment to winter result in different life history 
      characteristics which may explain coexistence of both phenotypes in a population. 
      We propose that polymorphism in photoresponsiveness may be beneficial in 
      stochastic environment, where environmental conditions differ between winters. We 
      suggest that non-responding phenotype may be particularly beneficial during mild 
      winter, whereas responders would be favored under harsh conditions. Therefore, 
      none of the phenotypes is impaired when compared to the other.
FAU - Przybylska, Anna S
AU  - Przybylska AS
AUID- ORCID: 0000-0002-3646-3686
AD  - 1Department of Vertebrate Zoology, Nicolaus Copernicus University, ul. Lwowska 1, 
      87-100 Torun, Poland. ISNI: 0000 0001 0943 6490. GRID: grid.5374.5
FAU - Wojciechowski, Michal S
AU  - Wojciechowski MS
AD  - 1Department of Vertebrate Zoology, Nicolaus Copernicus University, ul. Lwowska 1, 
      87-100 Torun, Poland. ISNI: 0000 0001 0943 6490. GRID: grid.5374.5
FAU - Jefimow, Malgorzata
AU  - Jefimow M
AD  - 2Department of Animal Physiology, Nicolaus Copernicus University, ul. Lwowska 1, 
      87-100 Torun, Poland. ISNI: 0000 0001 0943 6490. GRID: grid.5374.5
LA  - eng
PT  - Journal Article
DEP - 20190418
PL  - England
TA  - Front Zool
JT  - Frontiers in zoology
JID - 101231669
PMC - PMC6471882
OTO - NOTNLM
OT  - Basal metabolic rate
OT  - Life history traits
OT  - Oxidative stress
OT  - Photoresponsiveness
OT  - Polymorphism
OT  - Reproduction
COIS- All experimental procedures were approved by the Local Committee for Ethics in 
      Animal Research in Bydgoszcz, Poland (decisions nos. 3/2015, 31-33/2015, 
      35/2015).Not applicableThe authors declare that they have no competing 
      interests.Springer Nature remains neutral with regard to jurisdictional claims in 
      published maps and institutional affiliations.
EDAT- 2019/04/26 06:00
MHDA- 2019/04/26 06:01
PMCR- 2019/04/18
CRDT- 2019/04/26 06:00
PHST- 2019/02/05 00:00 [received]
PHST- 2019/03/31 00:00 [accepted]
PHST- 2019/04/26 06:00 [entrez]
PHST- 2019/04/26 06:00 [pubmed]
PHST- 2019/04/26 06:01 [medline]
PHST- 2019/04/18 00:00 [pmc-release]
AID - 311 [pii]
AID - 10.1186/s12983-019-0311-3 [doi]
PST - epublish
SO  - Front Zool. 2019 Apr 18;16:11. doi: 10.1186/s12983-019-0311-3. eCollection 2019.