Population Dynamics of the Spruce Budworm Choristoneura Fumiferana

@article{Royama1984PopulationDO,
  title={Population Dynamics of the Spruce Budworm Choristoneura Fumiferana},
  author={T. Royama},
  journal={Ecological Monographs},
  year={1984},
  volume={54},
  pages={429-462}
}
  • T. Royama
  • Published 1 February 1984
  • Environmental Science
  • Ecological Monographs
Using the latest observations, experiments, and theoretical studies, I have reanalyzed spruce budworm data from the Green River Project, and now propose a new interpretation of the population dynamics of the species. Spruce budworm populations in the Province of New Brunswick have been oscillating more or less periodically for the last two centuries, the average period being °35 yr. Local populations over the province tend to oscillate in unison, though their amplitudes and mean levels are not… 

Paradigms in Eastern Spruce Budworm (Lepidoptera: Tortricidae) Population Ecology: A Century of Debate.

Recent research on the early phase of spruce budworm cycles suggests that mate-finding and natural-enemy-driven Allee effects in low-density populations might be overcome by immigration of moths, which can facilitate the onset of outbreaks.

Paradigms in Eastern Spruce Budworm (Lepidoptera: Tortricidae) Population Ecology: A Century of Debate

The evolution of debates surrounding these hypotheses are discussed from a historic perspective, gaps in current knowledge are examined, and avenues for future research are suggested to better understand and manage spruce budworm populations.

ANALYSIS OF SPRUCE BUDWORM OUTBREAK CYCLES IN NEW BRUNSWICK, CANADA, SINCE 1952

A significant correlation in the rate at which eggs were recruited to each generation was found, thus providing evidence for the Moran effect as the mechanism underlying population synchrony that caused the province-wide outbreaks ofruce budworm outbreaks.

Sex Pheromones and Behavioral Biology of the Coniferophagous Choristoneura

The pheromone­ mediated behavior of both C. fumiferana and C. occidentalis has been studied in some detail, and this research may help decode the communication systems in the other species.

Dynamics and Management of Rising Outbreak Spruce Budworm Populations

Evidence lends support to the conclusion that, for a budworm population to increase to outbreak density, it must be elevated via external perturbations, such as immigration, above a threshold density of ~4 larvae per branch tip (L4).

Dendrochronological reconstruction of spruce budworm outbreaks in northern Maine, USA

Using dendrochronological analyses, we reconstructed a 300 year history of eastern spruce budworm (Choristoneura fumiferana (Clem.)) outbreaks in northern interior Maine. By analyzing radial growth

Modeling Spruce Budworm Population Revisited: Impact of Physiological Structure on Outbreak Control

Analysis and simulation results suggest that killing only budworm larvae might not be enough for the long-term control of the budworm population, and a strategy of reducing budworms in the inactive stage, such as removing egg biomass, should also be implemented for successful control.

Mechanisms underlying spruce budworm outbreak processes as elucidated by a 14‐year study in New Brunswick, Canada

A high level of correlation between the studied phase of the outbreak cycle and annual variations in the survivorship over the postdiapause period is found, suggesting that post diapause survivorship was the chief determinant of the cycle.

POPULATION GENETICS OF THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (CLEM.) FREEMAN (LEPIDOPTERA: TORTRICIDAE), IN RELATION TO GEOGRAPHICAL AND POPULATION DENSITY DIFFERENCES

  • G. Harvey
  • Biology
    The Canadian Entomologist
  • 1996
Collections of spruce budworm from 33 locations from Newfoundland to Alaska were analysed for isozyme frequencies using horizontal starch gels; all populations were generally homogeneous over the entire range, but one allozyme of AAT-1 exhibited a significant cline in frequency from the southeast to the northwest.
...

References

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NOTES ON THE EFFECTS OF PHYSICAL FACTORS ON THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (CLEM.)

Females in the dark-adapted state exbihit either photonegative behaviour or compassing behaviour, with no evidence that there is any orderly transition from one type of behaviour to the other.

Field fecundity of the spruce budworm (Lepidoptera: Tortricidae) as determined from regression relationships between egg complement, fore wing length, and body weight.

The assumption that the number of eggs laid by a spruce budworm moth in the field is the same as the number laid under laboratory conditions is shown to be false and has implications in population dynamics studies of the spruce Budworm.

ASPECTS OF MATING IN THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

Normal matings of Choristoneura fumiferana (Clem.) resulted in the transfer of single, persistent spermatophores, and the presence of a sperMatophore in the bursa of the female was not always indicative of successful insemination.

THE ROLE OF CLIMATE AND DISPERSAL IN THE INITIATION OF OUTBREAKS OF THE SPRUCE BUDWORM IN NEW BRUNSWICK: II. THE ROLE OF DISPERSAL

Analysis of the available weather data showed that the 1912 and 1949 outbreaks developed after several consecutive dry summers, and this suggests that the New Brunswick outbreaks are also a continuation of this spread.

Effects of the Destruction of the Current Year's Foliage of Balsam Fir on the Fecundity and Habits of Flight of the Spruce Budworm

  • J. Blais
  • Environmental Science
    The Canadian Entomologist
  • 1953
When spruce budworm larvae emerge in the spring, they either mine the needles of old foliage or feed upon the freshly opened staminate flowers of balsam fir. As soon as the vegetative buds begin to

A SEQUENTIAL SAMPLING TECHNIQUE FOR SPRUCE BUDWORM EGG SURVEYS

The sequential plan, having no fixed sample size, was tested in 1953 and proved very useful, particularly in eliminating superfluous sampling at points where the infestation was definitely light or definitely severe.

COLLECTION AND ANALYSIS OF RADIAL-GROWTH DATA FROM TREES FOR EVIDENCE OF PAST SPRUCE BUDWORM OUTBREAKS

Methods used in the collection of radial-growth data from host and non-host trees of the spruce budworm for the purpose of establishing evidence of past spruce budworm outbreaks are described. The

Evaluation of Mortality Factors in Insect Life Table Analysis

The aim of this paper is to develop the notion of "killing power" of a mortality factor, so that it can properly evaluate and incorporate in a model the effect of any given factor on the dynamics of the animal population concerned.

Stock and Recruitment

Plotting net reproduction (reproductive potential of the adults obtained) against the density of stock which produced them, for a number of fish and invertebrate populations, gives a domed curve

POPULATION PROCESSES IN THE VOLE AND THEIR RELEVANCE TO GENERAL THEORY

According to field evidence the individuals in a declining vole population are intrinsically less viable than their predecessors, and changes in the severity of their external mortality factors are insufficient to account for the increased probability of death.