OVARIAN DORMANCY IN <i>DANAUS PLEXIPPUS</i> (L.) (LEPIDOPTERA: NYMPHALIDAE)—OLIGOPAUSE NOT DIAPAUSE

James, DG

doi:10.1111/j.1440-6055.1982.tb01761.x

Cited by 20 publications

(19 citation statements)

References 20 publications

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“…Consequently, the overwintering survival strategy of the monarch might be expected to be less specialized in Australia than it is in North America. This is supported by earlier studies which indicate an absence of, rigid physiological control of reproductive dormancy in Australian monarchs (James, 1982a;James & Hales, 1983) and limited migration (Smithers, 1977;James, 1982b and unpublished observations). However, the data presented here indicate that the biochemical adjustments made by Australian monarchs for overwintering are comparable to those that occur in North American monarchs.…”

Section: Energy Reserves Of Australian Monarch Butterflies 427supporting

confidence: 81%

“…Presumably this is the result of synthesis and storage of protein, which in reproductive individuals is utilized in vitellogenesis and spermatogenesis. Similarly, the increase in lean dry weights of winter reproductive monarchs may result from the reduced intensity of reproductive development caused by cool temperatures and short photophases (Barker &Herman, 1976;James, 1982a). Protein synthesis is certainly indicated in early colonizers of winter colonies which show a rapid increase in lean dry weight.…”

Section: Energy Reserves Of Australian Monarch Butterflies 427mentioning

confidence: 97%

“…The Australian monarch has been the subject of recent studies (Smithers, 1965(Smithers, , 1972(Smithers, , 1977James, 1979James, , 1981James, , 1982aJames, , b, 1983James & Hales, 1983). Breeding populations occur widely in eastern Australia during spring and summer (September-February), but contract northwards during autumn (March-May).…”

Section: Introductionmentioning

confidence: 98%

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Phenology of weight, moisture and energy reserves of Australian monarch butterflies, Danaus plexippus

James

1984

Ecological Entomology

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1. In the Sydney area of New South Wales, dry weights of reproductive monarch butterflies averaged 156 mg and were higher during winter than in other seasons. Dry weights of non-reproductive monarchs ranged from 216 t o 324 mg and declined by 1~2 5 % during overwintering.2. Fat in reproductive butterflies ranged from 0.009 to 0.017g/O.lg dry weight and was lower during winter than in other seasons. Fat content of nonreproductive monarchs washigher (0.019-0.037 g/O.1 g) and declined by 24-51% during overwintering.3. Lean dry weights of reproductive monarchs were lower than those of nonreproductive individuals. Lean dry weights of non-reproductive butterflies increased rapidly at the beginning of overwintering and remained high throughout the winter. Analysis of protein content indicated the higher lean weight of non-reproductive monarchs was due to greater protein levels.4. Moisture content of monarchs did not vary with season or reproductive status and appeared t o be correlated with ambient humidity. 5. Non-reproductive monarch butterflies in New South Wales adjust biochemically during overwintering. Energy reserve dynamics of these butterflies are comparable to those that occur in non-reproductive monarchs in North America.

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Section: Energy Reserves Of Australian Monarch Butterflies 427supporting

confidence: 81%

Section: Energy Reserves Of Australian Monarch Butterflies 427mentioning

confidence: 97%

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Phenology of weight, moisture and energy reserves of Australian monarch butterflies, Danaus plexippus

James

1984

Ecological Entomology

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“…Reproductive dormant females of the nymphalid Danaus plexippus (L.) from overwintering clusters in Australia showed rapid ovarian development when exposed to a temperature of 28°C (James, 1982). In Drosophila melanogaster Meigen, adult diapause induced by short-day conditions at 12°C was terminated rapidly after being transferred to higher temperatures (15 or 18°C) or to long-day conditons (Saunders et al, 1989).…”

Section: Characteristics Of Adult Dormancy Of a Asychismentioning

confidence: 99%

Effects of photoperiod and temperature on adult oligopause of Aphelinus asychis and larval diapause of A. albipodus (Hymenoptera: Aphelinidae)

Tatsumi

Takada

2005

Appl. Entomol. Zool.

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The effects of photoperiod and temperature on the dormancy of two aphid parasitoids in Japan, Aphelinus asychis and A. albipodus, were studied in the laboratory. Adult (reproductive) dormancy was induced in A. asychis under 10L : 14D at moderate temperatures and under 15L : 9D at low temperatures. Dormant adults started oviposition 6-17 d after emergence under 10L : 14D at 15 and 18°C. Transferring newly emerged adults from 10L : 14D at 15 and 18°C to 15L : 9D at 20°C caused an apparent reversal of dormancy induction within 1-2 d. It was believed that adult dormancy in A. asychis conforms to "oligopause" rather than "diapause" sensu Mansingh (1971). Adults of A. asychis showed an apparent variation in abdominal coloration from yellowish brown to black. The proportion of females with dark abdominal coloration was higher under 10L : 14D than under 15L : 9D and high at lower temperatures. We regarded this polyphenism as a part of the "diapause syndrome" because oligopause and abdominal coloration were controlled by the same environmental factors. Aphelinus albipodus entered diapause as last instar larvae. The critical photoperiod for diapause induction was 11-12 h at 18°C, and diapause was terminated within six weeks by cold treatment (10L : 14D, 5°C).

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“…In an Australian population of the nymphalid Danaus plexippus (L.), which enters reproductive oligopause, the ovaries developed under short days at 15°C, but did not develop under long days or short days at 12°C (James, 1982). In a Hokkaido population of aphidiine Aphidius ervi Haliday, some adults emerged 23-33 d after oviposition under 10L : 14D at 15°C, but no adults emerged until 122 d under 10L : 14D at 10°C (Takada, unpublished data).…”

Section: Overwintering Of a Asychismentioning

confidence: 99%

Overwintering of the aphid parasitoids Aphelinus asychis and A. albipodus (Hymenoptera: Aphelinidae) under natural conditions in Kyoto, Japan

Tatsumi

Takada

2006

Appl. Entomol. Zool.

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Aphelinus asychis from Kyoto and A. albipodus from Kobe, which enter weak diapause, strictly oligopause sensu Mansingh (1971), as adults and diapause as larvae, respectively, were reared under natural conditions in Kyoto to validate their overwintering dormancy and to compare previous laboratory results with dormancy-inducing and terminating photoperiods and temperatures in the field. In A. asychis,

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OVARIAN DORMANCY IN DANAUS PLEXIPPUS (L.) (LEPIDOPTERA: NYMPHALIDAE)—OLIGOPAUSE NOT DIAPAUSE

Cited by 20 publications

References 20 publications

Phenology of weight, moisture and energy reserves of Australian monarch butterflies, Danaus plexippus

Phenology of weight, moisture and energy reserves of Australian monarch butterflies, Danaus plexippus

Effects of photoperiod and temperature on adult oligopause of Aphelinus asychis and larval diapause of A. albipodus (Hymenoptera: Aphelinidae)

Overwintering of the aphid parasitoids Aphelinus asychis and A. albipodus (Hymenoptera: Aphelinidae) under natural conditions in Kyoto, Japan

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