The Effects of Daylength and Temperature on the Hibernating Rhythm of the Meadow Jumping Mouse (Zapus hudsonius)

Muchlinski, Alan E.

doi:10.1086/physzool.53.4.30157879

Cited by 18 publications

(29 citation statements)

References 10 publications

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“…One problem in exposing endogenous rhythms is that they are sometimes expressed only under a very restricted set of conditions. For example, Muchlinski (1980) found that Zapus hudsonius, the meadow jumping mouse, hibernates according to an endogenous rhythm when housed at 5 O C in constant 12 h light: 12 h dark photoperiods, but not under long daylengths (15 h light). In contrast, the antler cycle of sika deer is only expressed when the lengths of day and night are not equal (see discussion below), and there are numerous similar examples in birds and small mammals (Gwinner 1986).…”

Section: Endogenous Rhythmsmentioning

confidence: 99%

Seasonal reproduction in flying foxes, reviewed in the context of other tropical mammals

Gm¹

1993

Reprod. Fertil. Dev.

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Megachiroptera inhabit the Old World tropics and most are seasonal breeders having defined times of testis growth, mating and parturition. In Pteropus scapulatus, the little red flying fox, the robust rhythm of testis cycles is resistant to modification by photoperiod. P. poliocephalus, the greyheaded flying fox, can be manipulated by photoperiod but responds slowly and incompletely. Most mammals live in the tropics, many in seasonally harsh climates, and many breed seasonally. However, few long-lived tropical mammals have been investigated for photoperiodic entrainment of annual reproductive cycles, and only animals from the edge of the tropics have responded. Thus, in long-lived tropical mammals, factors that regulate seasonal breeding have not yet been identified. Endogenous oscillators may generate circannual rhythms centrally. Downstream pathways (reproduction, metabolism, antlers, etc.) may derive their rhythm directly from the oscillator or may be modified by environmental cues. Plasticity of the circannual oscillator resolves confusion from previous contrasts between circannual rhythms and environmentally cued patterns. Plasticity may continue throughout life (species responsive to zeitgebers), but the oscillator may be 'set' in utero in some tropical species. Feedback effects from temperature, nutrition, hormones, etc. can be readily tested in this model of an oscillator generating an endogenous circannual rhythm.

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Section: Endogenous Rhythmsmentioning

confidence: 99%

Seasonal reproduction in flying foxes, reviewed in the context of other tropical mammals

Gm¹

1993

Reprod. Fertil. Dev.

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“…In contrast, immergence in Z. princeps was thought to be cued by availability of seeds in the diet rather than photoperiod (Cranford 1978). This difference may be a strategy that allows Z. princeps to cope with a much shorter period of above ground activity in the high elevation sites it occupies (i.e., ca 2.7 -4 months as compared with ca 5.5 months in many eastern U.S. populations of Z. hudsonius; Cranford 1978, 1983, Muchlinski 1980b. During years with late spring emergence and plant growth, there might not be enough time for jumping mice to accumulate fat reserves if immergence was consistently cued by day length.…”

Section: Introductionmentioning

confidence: 99%

“…Evidence suggests that photoperiod cues immergence into hibernation by Z. hudsonius in the eastern U.S. (Neumann and Cade 1964, Muchlinski 1978, 1980b. Because timing of immergence is cued by photoperiod, entrance into hibernation by adult Z. hudsonius may be more uniform both geographically and annually, in comparison to emergence.…”

Section: Introductionmentioning

confidence: 99%

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Peer Review #2 of "Variation in phenology of hibernation and reproduction in the endangered New Mexico meadow jumping mouse (Zapus hudsonius luteus) (v0.1)"

Dobson¹

2015

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Hibernation is a key life history feature that can impact many other crucial aspects of a species' biology, such as its survival and reproduction. I examined the timing of hibernation and reproduction in the federally endangered New Mexico meadow jumping mouse (Zapus hudsonius luteus), which occurs across a broad range of latitudes and elevations in the American Southwest. Data from museum specimens and field studies supported predictions for later emergence and shorter active intervals in montane populations relative to lower elevation valley populations. A low-elevation population located at Bosque del Apache National Wildlife Refuge (BANWR) in the Rio Grande valley was most similar to other subspecies of Z. hudsonius: the first emergence date was in mid-May and there was an active interval of 162 days. In montane populations of Z. h. luteus, the date of first emergence was delayed until mid-June and the active interval was reduced to ca 124-135 days, similar to some populations of the western jumping mouse (Z. princeps). Last date of immergence into hibernation occurred at about the same time in all populations (mid to late October). In montane populations pregnant females are known from July to late August and evidence suggests that they have a single litter per year. At BANWR two peaks in reproduction were expected based on similarity of active season to Z. h. preblei. However, only one peak was clearly evident, possibly due to later first reproduction and possible torpor during late summer. At BANWR pregnant females are known from June and July. Due to the short activity season and geographic variation in phenology of key life history events of Z. h. luteus, recommendations are made for the appropriate timing for surveys for this endangered species.

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“…Evidence suggests that photoperiod cues immergence into hibernation by Zapus hudsonius in the eastern U.S. (Neumann and Cade 1964, Muchlinski 1978, 1980b. Because timing of immergence is cued by photoperiod, entrance into hibernation by adult Z. hudsonius may be more uniform both geographically and annually, in comparison to emergence.…”

Section: Introductionmentioning

confidence: 99%

Timing of hibernation and reproduction in the endangered New Mexico meadow jumping mouse (Zapus hudsonius luteus)

Frey

2015

Preprint

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Hibernation is a key life history feature that can impact many other crucial aspects of a species’ biology, such as its survival and reproduction. I examined the timing of hibernation and reproduction in the federally endangered New Mexico meadow jumping mouse (Zapus hudsonius luteus), which occurs across a broad range of latitudes and elevations in the American Southwest. Data from museum specimens and field studies supported predictions for later emergence and shorter active intervals in montane populations relative to low-elevation populations. A low-elevation population located at Bosque del Apache National Wildlife Refuge (BANWR) in the Rio Grande valley was most similar to other populations of Z. hudsonius: the first emergence date was in mid-May and there was an active interval of 162 days. In montane populations of Z. h. luteus, the date of first emergence was delayed until mid-June and the active interval was reduced to ca 130 days, similar to some populations of the western jumping mouse (Z. princeps). Last date of immergence into hibernation occurred at about the same time in all populations (mid to late October). Evidence suggests that females may have a single litter per year in montane populations. At BANWR two peaks in reproduction were expected based on similarity of active season to Z. h. preblei, but the population exhibited little detectable above-ground activity in August, which could stem from a failure of the population to produce early litters. Recommendations are made with respect to appropriate timing of surveys for Z. h. luteus.

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The Effects of Daylength and Temperature on the Hibernating Rhythm of the Meadow Jumping Mouse (Zapus hudsonius)

Cited by 18 publications

References 10 publications

Seasonal reproduction in flying foxes, reviewed in the context of other tropical mammals

Seasonal reproduction in flying foxes, reviewed in the context of other tropical mammals

Peer Review #2 of "Variation in phenology of hibernation and reproduction in the endangered New Mexico meadow jumping mouse (Zapus hudsonius luteus) (v0.1)"

Timing of hibernation and reproduction in the endangered New Mexico meadow jumping mouse (Zapus hudsonius luteus)

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