Untersuchungen über den physiologischen und morphologischen Farbwechsel bei Amphibien

Himmer, A.

doi:10.1007/bf02111057

Cited by 12 publications

(2 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The general pattern is supposed to be genetically inherited (Seidel, Hartmann, & Hein, ), and it is developed through a morphological color change at metamorphosis, after which only slight changes occur (Pederzoli, Gambarelli, & Restani, ; Segev, ; but see Steinfartz, ). Contrary to the adults, fire salamander larvae display a cryptic greyish coloration and their pigmentation is regulated by physiological color changes to match the substrate (background) where they live in (Himmer, ). This called the attention of Paul Kammerer (), who postulated that the physiological color change induced by the background color on which fire salamander larvae grow would affect their postmetamorphic color pattern, i.e., it would lead to a morphological color change.…”

Section: Introductionmentioning

confidence: 99%

The conspicuous postmetamorphic coloration of fire salamanders, but not their toxicity, is affected by larval background albedo

et al. 2019

View full text Add to dashboard Cite

Experimental work in the early 20th century showed that background albedo experienced by larvae of the fire salamander (Salamandra salamandra) induce a durable morphological modification of the postmetamorphic color pattern, which needed confirmation due to the controversies regarding Paul Kammerer's experiments. Such a carry‐over effect would be relevant as the black and yellow pattern of the alkaloid‐containing adult fire salamanders has been suggested to serve as an aposematic signal. Hence, we hypothesized that (a) adult coloration is conspicuous to potential predators under light conditions at night, given the nocturnal activity of this species, and (b) a condition affecting the salamander's coloration pattern would also affect its toxicity to maintain a quantitatively honest aposematic signal. To test the first hypothesis, we used spectrometry to model the vision of potential avian and snake predators and confirmed that fire salamander's black‐and‐yellow pattern is contrasting enough against the forest leaf litter to be considered conspicuous at night. To test the second hypothesis, we first confirmed the background carry‐over effect on black and yellow proportions in the dorsal skin of experimentally reared fire salamanders, using a rigorous experimental design. Then, we calculated the conspicuousness and determined the alkaloid profiles of these individuals. We did not find a correlation between conspicuousness and toxicity at the intrapopulation level. Moreover, there was no background carry‐over effect on the alkaloid profile. We discuss our results in a physiological, ecological, evolutionary, and historical context.

show abstract

Section: Introductionmentioning

confidence: 99%

The conspicuous postmetamorphic coloration of fire salamanders, but not their toxicity, is affected by larval background albedo

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Anaesthetics such as ether, chloroform, chloretone, novocaine, and cocaine (Wyman, 1922(Wyman, , 1924Himmer, 1923) commonly induce an expansion of the melanophores and in the case of ether, this expansion has been shown to occur in denervated as well as in innervated cells ; hence the action of the drug must be local though it may also influence the nervous system. Nicotine, according to Schaefer (1921) and to Wyman (1924 a), also calls forth expansion, though Hewer (1926 b) attributes to it a contracting influence.…”

Section: G H Parkermentioning

confidence: 99%

Chromatophores

Parker

1930

Biological Reviews

View full text Add to dashboard Cite

Summary. Chromatophores, the parts concerned with the colour changes in animals, are best developed in the cephalopods, the crustaceans, and the three lower classes of vertebrates, the fishes, amphibians, and reptiles. In the cephalopods chromato‐ phores are really diminutive organs in that each one consists of a central coloured cell which is expanded against its own elasticity by radial muscle fibres. In the crustaceans a cellular complex often with several colours makes up each chromato‐ phore. This expands and contracts slowly and thus changes the tint of the animal. In the vertebrates a coloured background in the skin is exposed to view or covered up by motile black pigment cells whose melanin granules are made to migrate within the containing cell. Most animals show relatively uniform changes of colour, but in a few, as, for instance, flat‐fishes, a pattern may be imitated showing that the central control of the chromatophore system must be somewhat differentiated in the direction in which the musculature is.

show abstract

Morphological color changes in fishes

Odiorne

1937

J. Exp. Zool.

View full text Add to dashboard Cite

Untersuchungen über den physiologischen und morphologischen Farbwechsel bei Amphibien

Cited by 12 publications

References 35 publications

The conspicuous postmetamorphic coloration of fire salamanders, but not their toxicity, is affected by larval background albedo

The conspicuous postmetamorphic coloration of fire salamanders, but not their toxicity, is affected by larval background albedo

Chromatophores

Morphological color changes in fishes

Contact Info

Product

Resources

About