Photoperiodic control of antler cycles in deer. II. Alterations in amplitude

Goss, Richard J.

doi:10.1002/jez.1401710210

Cited by 77 publications

(16 citation statements)

References 28 publications

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“…la) (Gillet, 1904;Bedford, 1951;Petzsch, 1959;McEwan, 1968;Suttie & Kay, 1985), suggesting that the stag must have experienced two reproductive cycles. In addition, Goss (1976) found that sika deer (C. nippon) kept on an artificial photoperiod in which daylength decreased or increased by 2 h every 4 months cast and regrew their antlers each time the photoperiod changed, irrespective of the direction of change. If it is assumed that a full cycle of antler development is an indicator of a cycle of reproductive development, then it is clear that the deer in Goss's (1969) (Lincoln, 1977).…”

Section: Resultsmentioning

confidence: 99%

LH and testosterone responses to GnRH in red deer (Cervus elaphus) stags kept in a manipulated photoperiod

Suttie

Fennessy²,

Corson³

et al. 1989

Reproduction

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Section: Resultsmentioning

confidence: 99%

LH and testosterone responses to GnRH in red deer (Cervus elaphus) stags kept in a manipulated photoperiod

Suttie

Fennessy²,

Corson³

et al. 1989

Reproduction

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“…The loss in synchrony of spawning between the different individuals in each of the LL and 18L:6D regimes is also suggestive of "a freerunning" rhythm. Possibly, the accepted period limits of circannual cycles should be wider for even the study of Goss (1969) on antler growth in sika deer, which is often cited as a model example of a circannual rhythm, also includes animals with two antler growth cycles per year.…”

Section: Discussionmentioning

confidence: 98%

“…Under ambient conditions these cycles are closely entrained by the natural seasonal alterations in daylength. Similar patterns of entrainment can also be achieved under accelerated seasonal light cycles (Goss 1969;Bromage et aL 1982a;Elliott et aL 1984;Gwinner 1981), but not under constant photoperiod regimes. This suggests that the seasonallychanging daytength normally provides a sequence of photoperiodic cues (i.e.…”

Section: Introductionmentioning

confidence: 86%

“…Evidence for circannual rhythms has begun to appear over the past 10-15 years (Gwinner 1973(Gwinner , 1981 and although the most convincing data relate to birds (Berthold et al 1972;Berthold 1974;Gwinner, 1973Gwinner, , 1981 and mammals (Goss 1969;Pengelley and Asmundson 1974), a few studies suggest that circannual rhythms are also present in fish. Of these the clearest evidence of a circannual rhythm is provided by Sundararaj et al (1973) in their study of ovarian weight changes in catfish maintained under continuous light for period of 33 months.…”

Section: Introductionmentioning

confidence: 95%

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Photoperiodic mechanisms and rhythms of reproduction in the female rainbow trout

Duston

Bromage

1986

Fish Physiol Biochem

111

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The present work investigates the importance of circadian and circannual rhythms in the photoperiodic control of reproduction in the rainbow trout. Maintenance of groups of 20-30 female trout under continuous light (LL), constant long (18L:6D) or short (6L:18D) days and conditions of constant temperature (8.5-9.0°C) and feeding rates (0.5% body weight, day(-1)), starting in February, produced markedly different spawning periodicities during the first and subsequent years of treatment. At the end of the first year, spawning was advanced by up to 2 months in the fish under LL and 18L:6D and delayed by up to 5 months in those under 6L:18D when compared with the December spawning of control fish under ambient light. Continued exposure of the fish to the same photoperiod regimes produced cycles of spawning and peak levels of testosterone, oestradiol-17β and calcium (as an index of vitellogenin) at intervals of 150-170 days under LL and 18L:6D and 320-420 days under 6L:18D. The functional importance of these spawning cycles and their relationship to circannual rhythms and the control of reproduction is discussed.Exposure of fish to skeleton (6L:4D:2L:12D, 6L:6D:2L:10D and 6L:8D:2L:8D) and resonance (6L:42D, 6L:48D and 6L:54D) procedures produced ranges of spawning times up to two months in advance of control fish. Results with the resonance regimes, where fish received only a half the light-dark cycles and a quarter of the total daylight hours of those on ambient light cycles show that trout do not measure daylength and time by counting daily cycles or by hour-glass mechanisms. Collectively, these data support the proposition that rhythmic processes of photosensitivity are involved in the modulation of reproductive development in the rainbow trout and that circadian and circannual rhythms cooperate in the timing and entrainment of this cycle.

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“…Females of tropical species can give birth at any time of the year, and males can grow antlers at any time of the year. Every 12 months, however, each male sheds and replaces his antlers (Goss 1969a(Goss , 1969b. Those interested in antlers are also directed to Goss (1963Goss ( , 1968 and Jaczewski (1954).…”

mentioning

confidence: 99%

Natural History of Oregon Coast Mammals

Maser¹,

Mate²,

Franklin³

et al. 1981

109

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Maser, Chris, Bruce R. Mate, Jerry F. Franklin, and C. T. Dyrness. 1981 The book presents detailed information on the biology, habitats, and life histories of the 96 species of mammals of the Oregon coast. Soils, geology, and vegetation are described and related to wildlife habitats for the 65 terrestrial and 31 marine species. The book is not simply an identification guide to the Oregon coast mammals but is a dynamic portrayal of their habits and habitats. Life histories are based on fieldwork and available literature. An extensive bibliography is included. Personal anecdotes of the authors provide entertaining reading. The book should be of use to students, educators, land-use planners, resource managers, wildlife biologists, and naturalists.Keywords: Natural history, mammals (marine), mammals (land), Oregon coast, wildlife habitat. ForewordIt is a privilege to write a foreword to Natural Hisfory of Oregon Coast Mammals. I have observed the production of this book since its inception and believe it has two qualities that especially recommend it: First, it is timely, attuned to the almost indescribable sense of frustrated urgency that environmental matters must be dealt with by a mixture of wisdom, information, and common sense that seems impossible to obtain. Second, this book is one of authority, by writers who are able to give the best and most accurate accounting of the ecosystems that make up the coastal region of Oregon. It can be looked on as a model for similar treatises, and in fact it contains much information that is applicable to other areas. Allow me to expand briefly on these two points.We are living in a schizophrenic time: There is need for wise use of our resources and there is the companion need for sensible conservation. As residents of the Pacific Northwest, a phenomenally satisfying part of the world, we see the requirement and the push to provide an ever-better life for more and more people. This may be called the "Development Syndrome." It is well known and self explanatory.At the same time we know the extreme preciousness of naturalness and nature, called by many terms and related to inner feelings. This may be termed simply and best as the "Concern for Nature Syndrome." This syndrome is difficult to describe for it is different in each person. It embodies emotional requirements of feelings and perceptions. It combines remembrances with objective appraisals and hopes for the future. It is concerned with a basic need for stability in a changing world, for places that are changeless from childhood memories through present experiences into plans for the future.As many writers have compellingly stated, wilderness (or varieties of wilderness as perceived by the individual) is the symbolic evidence of the concern for nature. We, each of us, have our own needs and our own interpretations, stated or not, as to how these needs may be manifested and fulfilled. Theodore Roosevelt wrote iii (Hunting Trips of a Ranchman, Century, 1885): "In the after years there shall come forever the memory ...

show abstract

Photoperiodic control of antler cycles in deer. II. Alterations in amplitude

Cited by 77 publications

References 28 publications

LH and testosterone responses to GnRH in red deer (Cervus elaphus) stags kept in a manipulated photoperiod

LH and testosterone responses to GnRH in red deer (Cervus elaphus) stags kept in a manipulated photoperiod

Photoperiodic mechanisms and rhythms of reproduction in the female rainbow trout

Natural History of Oregon Coast Mammals

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