Fear of the dark: substrate preference in Amazonian tadpoles

Guimarães, Izabela Sabrina Campos; Hemnani, Mahima; Kaefer, Ígor Luís; Pires, Tiago

doi:10.1007/s10211-021-00374-x

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…Our study exploring mechanistic differences between the background adaptation and background preference response in X. laevis tadpoles had the advantage that both behaviours require visual recognition of colour/intensity originating from the substrate, rather than movement of visual features as is the case with predators. Interestingly, a recent study of five species of tadpoles, including one that shows aposematic coloration as an adult, shows that all possess white background preference and functional colour change (Guimarães et al, 2021), suggesting our results could extend to other species. Of note, the bright contrasting colours observed mainly in adults of some anuran species are probably associated with aposematic responses.…”

Section: Discussionmentioning

confidence: 57%

Distinct type II opsins in the eye decode light properties for background adaptation and behavioural background preference

et al. 2021

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Camouflage is driven by light perceived from the surrounding environment. During evolution, skin patterns and colours as well as behavioural responses were selected as strategies by prey and predators to avoid being detected (crypsis). Cryptic strategies that include masquerade, disruptive and distractive coloration, surface disruption, and countershading generally occur concomitantly with a degree of surface colour matching (Cuthill et al., 2017;Skelhorn & Rowe, 2016). This mimicking of background colour can be

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Section: Discussionmentioning

confidence: 57%

Distinct type II opsins in the eye decode light properties for background adaptation and behavioural background preference

et al. 2021

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“…In animals, the skin is among the main organs that maintain their homeostasis with essential functions such as osmotic balance, protection against pathogens, respiration, and chemical and physical mechanisms of defense against predators, crucial characteristics for the survival of aquatic tadpoles during development. (Toledo and Jared 1995; Xu and Lai 2015; Regueira et al 2016; Guimarães et al 2021). Throughout metamorphosis, this organ is submitted to a remodeling since it is necessary to provide for their ecophysiological needs in all life stages, such as different osmotic rates, respirations levels and environmental chemical signaling (Rot-Nikcevic et al 2005; Thibaudeau and Altig 2012).…”

Section: Introductionmentioning

confidence: 99%

Larvae to adult: skin ontogeny of Physalaemus ephippifer (Anura: Leptodactylidae)

Santos,

Oliveira-Bahia,

Souza-Ferreira

et al. 2023

Zoomorphology

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Throughout metamorphic development until adulthood, amphibians have important integumentary adaptations that maintain their physiological needs and protection against predation. The evolution of these strategies in the subfamily Leiuperinae has been elucidated in recent years. Therefore, the knowledge about Physalaemus ephippifer's skin attributes can corroborate the changes of these characteristics in the clade. The aim of this study was to assess the characteristics of P. ephippifer regarding the morphological development the skin during their lifespan. We collected foam nests in temporary ponds as well as adult individuals in a forest fragment. In the laboratory, the animals were classi ed by stage development, euthanized, and xed. Sections of the dorsolateral, lumbar, and femoral portions were dissected from the adult individuals. Samples were submitted to histological processing for light microscopy and scanning electron microscopy. In premetamorphosis phase, gland development is absent and secretory cells are present. In prometamorphosis, development of rst glandular rudiments without secretion production begins, also xanthophores. During metamorphosis, mucous glands differentiated before serous glands. Until late metamorphosis ciliated cells persist and epidermis changes to an adultlike. In adults, serous glands show polymorphism with different distributions in the body, despite not having macroglandular structures. In addition, P. ephippifer individuals have few epidermal projections and cryptic coloration. Our results show that despite sharing few morphological structures with other specimens of Leiuperinae subfamily, the characteristics present in individuals of P. ephippifer are appropriate to the niche occupied and consistent with the changes that occur throughout their lineage.

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Larvae to adult: Skin ontogeny of Physalaemus ephippifer (Anura: Leptodactylidae)

Santos,

Oliveira-Bahia,

Souza-Ferreira

et al. 2023

Preprint

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Throughout metamorphic development until adulthood, amphibians have important integumentary adaptations that maintain their physiological needs and protection against predation. The evolution of these strategies in the subfamily Leiuperinae has been elucidated in recent years. Therefore, the knowledge about Physalaemus ephippifer’s skin attributes can corroborate the changes of these characteristics in the clade. The aim of this study was to assess the characteristics of P. ephippifer regarding the morphological development the skin during their lifespan. We collected foam nests in temporary ponds as well as adult individuals in a forest fragment. In the laboratory, the animals were classified by stage development, euthanized, and fixed. Sections of the dorsolateral, lumbar, and femoral portions were dissected from the adult individuals. Samples were submitted to histological processing for light microscopy and scanning electron microscopy. In premetamorphosis phase, gland development is absent and secretory cells are present. In prometamorphosis, development of first glandular rudiments without secretion production begins, also xanthophores. During metamorphosis, mucous glands differentiated before serous glands. Until late metamorphosis ciliated cells persist and epidermis changes to an adultlike. In adults, serous glands show polymorphism with different distributions in the body, despite not having macroglandular structures. In addition, P. ephippifer individuals have few epidermal projections and cryptic coloration. Our results show that despite sharing few morphological structures with other specimens of Leiuperinae subfamily, the characteristics present in individuals of P. ephippifer are appropriate to the niche occupied and consistent with the changes that occur throughout their lineage.

show abstract

Fear of the dark: substrate preference in Amazonian tadpoles

Cited by 5 publications

References 33 publications

Distinct type II opsins in the eye decode light properties for background adaptation and behavioural background preference

Distinct type II opsins in the eye decode light properties for background adaptation and behavioural background preference

Larvae to adult: skin ontogeny of Physalaemus ephippifer (Anura: Leptodactylidae)

Larvae to adult: Skin ontogeny of Physalaemus ephippifer (Anura: Leptodactylidae)

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