Weitere Untersuchungen Über Schwarzanpassung bei Imagines von Heuschrecken

Ergene, Saadet

doi:10.1002/mmnz.4830300109

Cited by 2 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…without a moult, in a number of acridid genera (Burtt, 1951, and some earlier references therein; reviews by Uvarov, 1966, pp. 52–56; Rowell, 1971; Fuzeau‐Braesch, 1985), including Oedipoda (Ergene, 1953b, 1954; Levita, 1970). The present study demonstrates that DCIN evokes a darkening response in O. miniata adults.…”

Section: Discussionmentioning

confidence: 99%

“…Studies on homochromy of two species of the grasshopper genus Oedipoda demonstrated that both nymphs and adults of O. caerulescens (formerly also named as O. coerulescens ) and O. miniata show strong homochromy, but neither green‐brown, nor phase‐related colour polymorphism (Ergene, 1952, 1953a,b, 1954; Levita, 1966a,b, 1970). In O. caerulescens, a factor in the pars intercerebralis of the brain and in the corpora cardiaca was reported to control dark homochromy (Moreteau‐Levita, 1972a,b; Moreteau, 1975).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Age‐dependent response of adults of a homochrome grasshopper, Oedipoda miniata, to the dark‐colour‐inducing neurohormone (DCIN) of locusts

Yerushalmi

Pener

2002

Physiological Entomology

View full text Add to dashboard Cite

Abstract. The effect of the dark-colour-inducing neurohormone (DCIN [His 7 ]-corazonin) of locusts was investigated in field-collected young and old adults of the grasshopper, Oedipoda miniata (Pallas) (Orthoptera: Acrididae). This species shows homochromy, but neither green-brown, nor phase-dependent colour polymorphism. By injecting graded doses of synthetic DCIN in 2 mL of olive oil, young adults were tested within a week of their last moult, and old adults 3.5 months later, a few weeks before natural termination of their reproductive summer diapause. Colour changes were followed for 28 days after injection. Darkening of the young adults was considerable, but their response to DCIN is more moderate than that of conspecific nymphs, by exhibiting a higher threshold, slower response and weaker maximal response. Old adults also show a clear effect, but their response is even slower and less marked than the response of the young adults. It is concluded that the response to DCIN decreases from nymphs to young adults and it is further decreasing with ageing of the adults.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Age‐dependent response of adults of a homochrome grasshopper, Oedipoda miniata, to the dark‐colour‐inducing neurohormone (DCIN) of locusts

Yerushalmi

Pener

2002

Physiological Entomology

View full text Add to dashboard Cite

show abstract

“…Homochromy is not restricted to solitarious nymphs of L. migratoria ; it is exhibited by nymphs and adults of many grasshopper (acridid) species. A well known example of homochromy is darkening or even blackening of the colour induced by black underground, often termed ‘fire darkening’, because it is observed in the field after a fire (Burtt, 1951 and earlier references therein; Ergene, 1952, 1953a, b, 1954; Levita, 1966a, b; Rowell, 1970; reviews by Uvarov, 1966, pp. 52–56; Rowell, 1971; Fuzeau‐Braesch, 1985).…”

Section: Introductionmentioning

confidence: 99%

The dark‐colour‐inducing neurohormone of locusts: strain‐dependent and phase‐independent effects on adults of the migratory locust, Locusta migratoria

Grach

Yerushalmi

Inlow

et al. 2004

Physiological Entomology

View full text Add to dashboard Cite

Abstract. An albino strain that had originated from Okinawa, Japan, and a normally coloured strain that had originated from West Africa, were used to study the darkening response to injection of graded doses of dark‐colour‐inducing neurohormone of locusts (DCIN) ([His7]‐corazonin) of gregarious and solitarious adults of the migratory locust, Locusta migratoria (L.). By repeated crossings, congenic albinos and normal phenotypes were obtained, both with a 99.6% West African genome, and their darkening response was compared with the original Okinawa and West African strains. Within each of these four strains, no difference was found in DCIN‐induced darkening between gregarious and solitarious adults despite previous publications in the literature claiming an absence of ‘fire‐darkening’ in gregarious adults of this species. Okinawa albino adults showed a markedly higher darkening response than the other three strains, including albinos with a 99.6% West African genome. This finding demonstrates that the differential darkening response of the Okinawa albinos is caused not by albinism, but by the geographical origin (Okinawa) of the strain. This is the first report of geographical‐strain‐dependent differences in the response of an insect to a neurohormone. The darkening response of adults reached a maximum on day 10 after injection; subsequently, the dark colour faded slowly. Adults injected 1 day after their moult showed a greater darkening response than those injected after 14 or 28 days.

show abstract

Weitere Untersuchungen Über Schwarzanpassung bei Imagines von Heuschrecken

Cited by 2 publications

References 0 publications

Age‐dependent response of adults of a homochrome grasshopper, Oedipoda miniata, to the dark‐colour‐inducing neurohormone (DCIN) of locusts

Age‐dependent response of adults of a homochrome grasshopper, Oedipoda miniata, to the dark‐colour‐inducing neurohormone (DCIN) of locusts

The dark‐colour‐inducing neurohormone of locusts: strain‐dependent and phase‐independent effects on adults of the migratory locust, Locusta migratoria

Contact Info

Product

Resources

About