Food Capture in Vertebrates: A Complex Integrative Performance of the Cranial and Postcranial Systems

Montuelle, Stéphane J.; Kane, Emily A.

doi:10.1007/978-3-030-13739-7_4

Cited by 20 publications

(20 citation statements)

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“…2019). The whole skeleton is therefore supposed to be affected by functional activities related to hunting, killing, and consuming prey (see Montuelle and Kane 2019).…”

mentioning

confidence: 99%

Phenotypic integration in feliform carnivores: Covariation patterns and disparity in hypercarnivores versus generalists

2020

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The skeleton is a complex arrangement of anatomical structures that covary to various degrees depending on both intrinsic and extrinsic factors. Among the Feliformia, many species are characterized by predator lifestyles providing a unique opportunity to investigate the impact of highly specialized hypercarnivorous diet on phenotypic integration and shape diversity. To do so, we compared the shape of the skull, mandible, humerus, and femur of species in relation to their feeding strategies (hypercarnivorous vs. generalist species) and prey preference (predators of small vs. large prey) using three-dimensional geometric morphometric techniques. Our results highlight different degrees of morphological integration in the Feliformia depending on the functional implication of the anatomical structure, with an overall higher covariation of structures in hypercarnivorous species. The skull and the forelimb are not integrated in generalist species, whereas they are integrated in hypercarnivores. These results can potentially be explained by the different feeding strategies of these species. Contrary to our expectations, hypercarnivores display a higher disparity for the skull than generalist species. This is probably due to the fact that a specialization toward high-meat diet could be achieved through various phenotypes. Finally, humeri and femora display shape variations depending on relative prey size preference. Large species feeding on large prey tend to have robust long bones due to higher biomechanical constraints.

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“…2019). The whole skeleton is therefore supposed to be affected by functional activities related to hunting, killing, and consuming prey (see Montuelle and Kane 2019).…”

mentioning

confidence: 99%

Phenotypic integration in feliform carnivores: Covariation patterns and disparity in hypercarnivores versus generalists

2020

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“…In the younger stages of the development in T. dobrogicus, the feeding strategy is impacted by the poor potential of the larvae to perform any forms of ram feeding (for overview see Heiss et al, 2018;Montuelle and Kane, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…In vertebrates, the movements of the cranial and post-cranial element during the feeding events can be integrated to different levels (Montuelle and Kane, 2019). In many vertebrate groups, the kinematics of the feeding apparatus during the initial phases of the feeding process (see Schwenk, 2000) is well documented by using high-speed videography and cineradiography (for an overview see Bels and Whishaw, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The stages of capture/subjugation (when present) and ingestion are regarded as the initial stages of the feeding process sensu stricto. Montuelle and Kane (2019) define two behavioral phases which precede the prey capture -the "searching" and the "approaching." The activity of the sensors and the locomotion system during searching and approaching, allows the predator to recognize and access the prey before the initial stages of the feeding process.…”

Section: Introductionmentioning

confidence: 99%

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Ontogenetic Changes of the Aquatic Food Uptake Mode in the Danube Crested Newt (Triturus dobrogicus Kiritzescu 1903)

et al. 2021

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The study of the feeding mechanisms in vertebrates requires an integrative approach since the feeding event consists of a chain of behaviors. In the present study we investigated the food uptake behavior in different ontogenetic stages in the Danube crested newt (Triturus dobrogicus). We focused on the coordination in the kinematics of the elements of the locomotor and the feeding systems at the transition between the approach of the newt to the prey and the food uptake start. In the feeding strategy of the larvae of T. dobrogicus, the phase of food search is replaced by an initial “food detection phase.” In both larvae and adult specimens, the animals approached the food to a close distance by a precise positioning of the snout besides the food item. The larvae were able to reach food items offered at over 80° relative to the longitudinal midline of the head. When the food was offered at a large distance or laterally, the food uptake was either not successful or the coordination chain at the transition between food approach and food uptake was interrupted. In young larvae we detected an abrupt change in the activity of the locomotor system and the feeding system. The larvae approached the food by tail undulation and after reaching the final position of attack, no further activity of the locomotor apparatus was detectable. The larvae used a pure form of inertial suction to ingest food. In pre-metamorphic larvae and adults we registered an integrated activation of the locomotor apparatus (both limbs and tail) and the feeding apparatus during prey capture in the form of compensatory suction. The drastic change in the feeding mode of the pre-metamorphotic larvae and the adults compared to the younger larvae in T. dobrogicus may indicate the evolutionary development of a defined relation in the activity of the locomotor system and the control of the feeding apparatus. We propose that in newts, the interaction between the control execution in both systems switched from successive (body movement – feeding) into integrated (body movement – body movement and feeding) during the ontogeny. The main trigger for such a switch (at least in T. dobrogicus) is the formation of functional limbs during the late larval development.

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“…Digestion, or food processing, is a key phase of animal feeding (Montuelle & Kane, 2019). In response to the challenges of digestion, many animal lineages have evolved complex morphological and physiological adaptations during their evolutionary history.…”

Section: Introductionmentioning

confidence: 99%

Effects of diet and gizzard muscularity on grit use in domestic chickens

Takasaki

Kobayashi

2020

PeerJ

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The gizzard is the only gastrointestinal organ for mechanical processing in birds. Many birds use grit in the gizzard to enhance mechanical processing efficiency. We conducted an experiment to test the factors that affect chicken grit use in 68 male layer chicks of Gallus gallus domesticus, which were divided into two different groups in gizzard muscularity (high and low). Within each muscularity group, two different diets were provided (herbivory and non-herbivory) to test whether diet and gizzard muscularity affect grit characteristics including amount, size, and shape (circularity, roundness, and solidity) at different stages of digestion (ingested grit, grit in gizzard, and excreted grit). All animals ingested more grit than they excreted, possibly because excreted grit was below the detection size limit of 0.5 mm of the present study. The amounts of grit ingested and remained in the gizzard were larger in herbivorous groups, but these groups excreted less grit. Larger, rougher grit was selectively ingested by all chicks, but size preferences were especially pronounced in the herbivorous groups. Grit in the gizzard tended to be larger in herbivorous groups, but the grit in excreta was smaller, whereas the size of excreted grit was larger in groups with less muscular gizzards. Grit in the gizzard was much smoother than the offered and ingested grit, especially in the herbivorous, muscular gizzard groups. Excreted grit in all groups was smoother than the offered grit. These results show that diet affects the characteristics of ingested grit, grit in the gizzard, and excreted grit, whereas gizzard muscularity affects the characteristics of grit in the gizzard and excreted grit. The use of larger sizes and amounts of grit by herbivorous groups may be a response to the needs of digesting hard, coarse materials. The recovered behavioral flexibility of grit use might reflect the omnivorous nature of Gallus gallus domesticus and may aid smooth dietary shifts. The results also show that the shape of grit remaining in the gizzard does not reflect the initial shape of ingested grit, in contrast to previously published ideas. Instead, the shape of grit in the gizzard more closely reflects the diet and gizzard muscularity of chicks.

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Food Capture in Vertebrates: A Complex Integrative Performance of the Cranial and Postcranial Systems

Cited by 20 publications

References 400 publications

Phenotypic integration in feliform carnivores: Covariation patterns and disparity in hypercarnivores versus generalists

Phenotypic integration in feliform carnivores: Covariation patterns and disparity in hypercarnivores versus generalists

Ontogenetic Changes of the Aquatic Food Uptake Mode in the Danube Crested Newt (Triturus dobrogicus Kiritzescu 1903)

Effects of diet and gizzard muscularity on grit use in domestic chickens

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