The growth and pigmentary responses of eyeless amblystoma embryos reared in light and in darkness

Detwiler, S. R.; Copenhaver, W. M.

doi:10.1002/ar.1090760211

Cited by 8 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From these results I conclude that not only is vision not being used in nocturnal feeding by these salamanders, but that vision may not be as important in die1 feeding as initially suspected (Nicholas 1922;Anderson 1968;Dodson and Dodson 197 1;Sprules 1972;Zaret 1980). This conclusion agrees with Ambystoma growth data collected by Detwiler and Copenhaver (1940) who observe, ". .…”

Section: Discussionsupporting

confidence: 92%

“…These results suggest that olfaction alone is not sufficient for the observed feeding rates and size selection in salamanders. Indeed, Detwiler and Copenhaver (1940) found that Ambystoma larvae deprived of both eyes and nasal placodes as embryos responded by snapping at food and inanimate objects in motion. They state (p. 243), "We wish to emphasize the fact that in the absence of both eyes and the nasal placodes the larvae feed as well as do normal animals.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Vision is not necessary for size-selective zooplanktivory in aquatic salamanders

Lannoo

1986

Can. J. Zool.

View full text Add to dashboard Cite

LANNOO, M. J. 1986. Vision is not necessary for size-selective zooplanktivory in aquatic salamanders. Can. J. Zool. 64: 1071-1075. Vision is usually implicated as the sensory modality employed in size-selective zooplanktivory by aquatic vertebrates. I tested this generalization for nocturnally active salamanders by offering sighted and enucleated Ambystoma maculatum larvae a choice of large vs. small, or normally coloured vs. artificially darkened Daphnia, a natural prey. Salamanders in all treatments took the largest Daphnia and exhibited similar high feeding rates. There was no preference for artificially darkened Daphnia, as would be expected if visual cues predominate. Together these results indicate that vision is not exclusively responsible for size-selective predation by nocturnal salamanders. The often stated or implied assumption that size selectivity indicates visual predation in aquatic vertebrates should thus be questioned.LANNOO, M. J. 1986. Vision is not necessary for size-selective zooplanktivory in aquatic salamanders. Can. J. Zool. 64: 1071-1075. Les vertkbrks aquatiques utilisent ordinairement leur sens de la vue pour choisir des proies en fonction de la taille dans le zooplancton. J'ai mis cette thkorie ii l'kpreuve chez des salamandres actives la nuit, en offrant un choix de petites ou de grosses proies ou un choix Daphnia, une proie naturelle, de couleurs normales ou de Daphnia colorkes artificiellement ii des larves rendues aveugles et des larves intactes d' Ambystoma maculatum. Dans toutes les exNriences, les salamandres ont choisi les plus grosses daphnies et leur taux d'alimentation s'est avCrC semblable et ClevC dans tous les cas. I1 n' y avait pas de prkfkrence pour les daphnies plus foncCes colorkes artificiellement c o m e on devrait s'y attendre si les salamandres chassaient ii vue. Ces rksultats indiquent donc que la vision n'est pas exclusivement responsable de la prkdation en fonction de la taille chez les salamandres nocturnes. La thCorie souvent invoquCe selon laquelle la sklectivitC des proies suppose une prkdation par chasse ii vue chez les vertkbrks aquatiques est remise en question.[Traduit par la revue]

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Vision is not necessary for size-selective zooplanktivory in aquatic salamanders

Lannoo

1986

Can. J. Zool.

View full text Add to dashboard Cite

show abstract

The influence of the eyes on the melanophores in amphibian

Szepsenwol

1945

Anat. Rec.

View full text Add to dashboard Cite

The lower vertebrates (reptiles, fish and amphibians) and some invertebrates (Crustaceans) change their color under the influence of light and darkness. When illuminated, on a white background, the animal becomes clear, due to the contraction of its melanophores, and on a black background it becomes dark, due to the expansion of the melanophores. These color changes are influenced by the eyes ; blind animals do not react at all to the effect of light but remain always dark or show a reversed reaction, becoming dark on a white background and clear in the darkness.The mechanism by which the eyes influence the color changes is not known, but the following three hypotheses have been taken into consideration by different authors :

show abstract

The results of unilateral and bilateral extirpation of the forebrain of Amblystoma

Detwiler¹

1945

J. Exp. Zool.

View full text Add to dashboard Cite

The growth and pigmentary responses of eyeless amblystoma embryos reared in light and in darkness

Cited by 8 publications

References 8 publications

Vision is not necessary for size-selective zooplanktivory in aquatic salamanders

Vision is not necessary for size-selective zooplanktivory in aquatic salamanders

The influence of the eyes on the melanophores in amphibian

The results of unilateral and bilateral extirpation of the forebrain of Amblystoma

Contact Info

Product

Resources

About