Biomechanical features of the bill and and jaw apparatus of cuckoos, turacos and the hoatzin in relation to food acquisition and processing

Korzun, Leonid P.; Érard, Christian; Gasc, Jean‐Pierre; Dzerzhinsky, Felix J.

doi:10.2989/00306520309485369

Cited by 14 publications

(21 citation statements)

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“…The parallel fibers of the dm and its low MA values suggest its purpose could be to produce a rapid opening of the jaw. The static morphofunctional analysis presented by Korzun et al (), which was restricted to Cuculus canorus , does not include PCSA or MA values, so there are no available data to compare with our results.…”

Section: Discussionmentioning

confidence: 91%

“…Despite the apparently unspecialized cranio‐mandibular complex of G. guira , certain features of the individual muscles can be related to its trophic habit. Cuculiformes feed using their beak tip to pluck prey which is then processed mechanically at the base of the bill (Korzun et al, ). Catching living prey requires quick movements.…”

Section: Discussionmentioning

confidence: 99%

“…The cranio‐mandibular complex in birds represents an excellent system to explore such a theme. Because the bill is the main structure for acquisition and preliminary processing of food (Korzun, Erard, Gasc, & Dzerzhinsky, ), favoring either force or velocity depending on the trophic habit of the species (Corbin, Lowenberger, & Gray, ; Herrel, O'Reilly, & Richmond, ; Reiser, Welch, Suarez, & Altshuler, ; Ritchie, ; Vogel, ), the morphology of the beak and the cranio‐mandibular complex are likely to be subject to selective pressure (Clabaut, Herrel, Sanger, Smith, & Abzhanov, ; Korzun, Erard, Gasc, & Dzerzhinsky, ).…”

Section: Introductionmentioning

confidence: 99%

“…Marceliano () developed a detailed description of the cranio‐mandibular complex of O. hoazin and compared it with some species of Cuculiformes and Musophagiformes, but the descriptions did not follow a modern nomenclature and were not detailed with regards to these two orders. Korzun et al () published a biomechanical analysis of some species of Opisthocomidae, Musophagidae, and Cuculidae along with a general description and illustrations of the superficial head musculature. Cuculidae, the focus of the current study, were represented by only one species: Cuculus canorus .…”

Section: Introductionmentioning

confidence: 99%

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Functional morphology of the cranio‐mandibular complex of the Guira cuckoo (Aves)

Pestoni

Degrange

Tambussi

et al. 2018

Journal of Morphology

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The cranio-mandibular complex is an important structure involved in food capture and processing. Its morphology is related to the nature of the food item. Jaw muscles enable the motion of this complex and their study is essential for functional and evolutionary analysis. The present study compares available behavioral and dietary data obtained from the literature with novel results from functional morphological analyses of the cranio-mandibular complex of the Guira cuckoo (Guira guira) to understand its relationship with the zoophagous trophic habit of this species. The bite force was estimated based on muscle dissections, measurements of the physiological cross-sectional area, and biomechanical modeling of the skull. The results were compared with the available functional morphological data for other birds. The standardized bite force of G. guira is higher than predicted for exclusively zoophagous birds, but lower than for granivorous and/or omnivorous birds. Guira guira possesses the generalized jaw muscular system of neognathous birds, but some features can be related to its trophic habit. The external adductor muscles act mainly during food item processing and multiple aspects of this muscle group are interpreted to increase bite force, that is, their high values of muscle mass, their mechanical advantage (MA), and their perpendicular orientation when the beak is closed. The m. depressor mandibulae and the m. pterygoideus dorsalis et ventralis are interpreted to prioritize speed of action (low MA values), being most important during prey capture. The supposed ecological significance of these traits is the potential to widen the range of prey size that can be processed and the possibility of rapidly capturing agile prey through changes in the leverage of the muscles involved in opening and closing of the bill. This contributes to the trophic versatility of the species and its ability to thrive in different habitats, including urban areas.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Functional morphology of the cranio‐mandibular complex of the Guira cuckoo (Aves)

Pestoni

Degrange

Tambussi

et al. 2018

Journal of Morphology

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“…Evidence-based research helps keepers better understand the species they are caring for and improves provision for a species within a managed environment (Melfi, 2009). Turacos (Order Cuculiformes; Family Musophagidae) are mediumsized birds endemic to the regions of sub-Saharan Africa (Korzun, Erard, Gasc, & Dzerzhinsky, 2003). With the exception of Bannerman's turaco (Tauraco bannermani) (endangered), Ruspoli's turaco (T. ruspolii) (vulnerable), and Fischer's turaco (T. fischeri) (Near Threatened) the Musophagidae family are classified as least concern by the IUCN (BirdLife International, 2012b,c, 2013.…”

Section: Introductionmentioning

confidence: 99%

A multi‐zoo investigation of nutrient provision for captive red‐crested turacos

2017

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Turacos (Musophagidae) are common zoo birds; the 14 species of Tauraco being most often exhibited. Turacos possess unique non-structural, copper-based feather pigments, and a specialized dietary strategy. Tauraco inhabit tropical woodlands, foraging for predominantly folivorous and/or frugivorous food items. Using a study population of 16 red-crested turacos (T. erythrolophus) at seven zoos in the United Kingdom, the nutrient composition of diets from diet sheets was calculated, using Zootrition v.2.6, Saint Louis Zoo, USA for analyses of important nutrients within each diet, and compared against an example of currently available literature. For all nutrients analyzed, significant differences were noted between amounts presented in each zoo's diet (as fed). Turacos are presented with a wide range of ingredients in diets fed, and all zoos use domestic fruits to a large extent in captive diets. Similarities exist between zoos when comparing amounts of as-fed fiber. Analysis of the calcium to phosphorous ratio for these diets showed there to be no significant difference from the published ratio available. While this is a small-scale study on only a limited number of zoos, it provides useful information on current feeding practice for a commonly-housed species of bird and highlights potential areas of deviation away from standard practice, as well as identifying ways of reducing wastage of food. Data on wild foraging behavior and food selection, or collaboration with tauraco keepers from institutions in the tropics, is recommended as a way of improving feeding regimes and updating feeding practice for this and other Tauraco species.

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Redefining the simplicity of the craniomandibular complex of nightjars: The case of Systellura longirostris (Aves: Caprimulgidae) by means of anatomical network analysis

Mendoza

Carril

Degrange

et al. 2022

Journal of Morphology

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To study morphological evolution, it is necessary to combine information from multiple intersecting research fields. Here, we report on the structure of the bony and muscular elements of the craniomandibular complex of birds, highlighting its morphological architecture and complexity (or simplification) in the context of anatomical networks of the Band‐winged Nightjar Systellura longirostris (Caprimulgiformes, Caprimulgidae). This species has skull osteology and jaw myology that departs from the general structural plan of the craniomandibular complex of Neornithes and is considered morphologically simple. Our goal is to test if its simplification is also reflected in its anatomical network, particularly in those parameters that measure complexity and to explore if the distribution of the networks in a phylomorphospace is conditioned by their evolutionary history or by convergence. Our results show that S. longirostris clusters with other Strisores and momotids and is segregated from the other bird species analyzed when plotted in the phylomorphospace, as a consequence of convergence in the network parameters. Systellura has a craniomandibular complex consisting of fewer muscles connecting more bones than the model species (e.g., the rock pigeon or the guira cuckoo). In this sense, Systellura is actually more complex regarding the number of integrative bony parts, while its craniomandibular complex is simpler. According to its anatomical network, Systellura also can be interpreted as less complex, particularly compared with other Strisores and taxa that reflect the general structure of the craniomandibular complex in Neornithes.

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Biomechanical features of the bill and and jaw apparatus of cuckoos, turacos and the hoatzin in relation to food acquisition and processing

Cited by 14 publications

References 0 publications

Functional morphology of the cranio‐mandibular complex of the Guira cuckoo (Aves)

Functional morphology of the cranio‐mandibular complex of the Guira cuckoo (Aves)

A multi‐zoo investigation of nutrient provision for captive red‐crested turacos

Redefining the simplicity of the craniomandibular complex of nightjars: The case of Systellura longirostris (Aves: Caprimulgidae) by means of anatomical network analysis

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