scholarly journals Independently evolved upper jaw protrusion mechanisms show convergent hydrodynamic function in teleost fishes

2012 ◽  
Vol 215 (9) ◽  
pp. 1456-1463 ◽  
Author(s):  
K. L. Staab ◽  
R. Holzman ◽  
L. P. Hernandez ◽  
P. C. Wainwright
Keyword(s):  
Teleost Fishes ◽  
Jaw Protrusion ◽  
Upper Jaw ◽  
Hydrodynamic Function

scholarly journals Evolution of Upper Jaw Protrusion Mechanisms in Elasmobranchs1

2001 ◽  
Vol 41 (6) ◽  
pp. 1248-1257 ◽  
Author(s):  
Cheryl D. Wilga ◽  
Robert E. Hueter ◽  
Peter C. Wainwright ◽  
Philip J. Motta
Keyword(s):  
Jaw Protrusion ◽  
Upper Jaw

scholarly journals Jaw protrusion enhances forces exerted on prey by suction feeding fishes

2008 ◽  
Vol 5 (29) ◽  
pp. 1445-1457 ◽  
Author(s):  
Roi Holzman ◽  
Steven W Day ◽  
Rita S Mehta ◽  
Peter C Wainwright
Keyword(s):  
Prey Capture ◽  
Species Variation ◽  
Total Force ◽  
Teleost Fishes ◽  
Independent Source ◽  
Hydrodynamic Approach ◽  
Bony Fishes ◽  
Jaw Protrusion ◽  
Living Species ◽  
Prey Remains

The ability to protrude the jaws during prey capture is a hallmark of teleost fishes, widely recognized as one of the most significant innovations in their diverse and mechanically complex skull. An elaborated jaw protrusion mechanism has independently evolved multiple times in bony fishes, and is a conspicuous feature in several of their most spectacular radiations, ultimately being found in about half of the approximately 30 000 living species. Variation in jaw protrusion distance and speed is thought to have facilitated the remarkable trophic diversity found across fish groups, although the mechanical consequences of jaw protrusion for aquatic feeding performance remain unclear. Using a hydrodynamic approach, we show that rapid protrusion of the jaws towards the prey, coupled with the spatial pattern of the flow in front of the mouth, accelerates the water around the prey. Jaw protrusion provides an independent source of acceleration from that induced by the unsteady flow at the mouth aperture, increasing by up to 35% the total force exerted on attached, escaping and free-floating passive prey. Despite initiating the strike further away, fishes can increase peak force on their prey by protruding their jaws towards it, compared with a ‘non-protruding’ state, where the distance to prey remains constant throughout the strike. The force requirements for capturing aquatic prey might have served as a selective factor for the evolution of jaw protrusion in modern fishes.

scholarly journals A novel intramandibular joint facilitates feeding versatility in the sixbar distichodus

2022 ◽  
Author(s):  
Christopher M. Martinez ◽  
Angelly J. Tovar ◽  
Peter C. Wainwright
Keyword(s):  
Prey Capture ◽  
Teleost Fishes ◽  
Feeding Mode ◽  
Substrate Interaction ◽  
Lower Jaw ◽  
Single Structure ◽  
Jaw Protrusion ◽  
Benthic Prey ◽  
Analysis Of Motion

The intramandibular joint (IMJ) is a secondary point of movement between the two major bones of the lower jaw. It has independently evolved in several groups of teleost fishes, each time representing a departure from related species in which the mandible functions as a single structure rotating only at the quadratomandibular joint (QMJ). In this study, we examine kinematic consequences of the IMJ novelty in a freshwater characiform fish, the herbivorous Distichodus sexfasciatus. We combine traditional kinematic approaches with trajectory-based analysis of motion shapes to compare patterns of prey capture movements during substrate biting, the fish's native feeding mode, and suction of prey from the water column. We find that the IMJ enables complex jaw motions and contributes to feeding versatility by allowing the fish to modulate its kinematics in response to different prey and to various scenarios of jaw-substrate interaction. Implications of the IMJ include context-dependent movements of lower versus upper jaws, enhanced lower jaw protrusion, and the ability to maintain contact between the teeth and substrate throughout the jaw closing or biting phase of the motion. The IMJ in D. sexfasciatus appears to be an adaptation for removing attached benthic prey, consistent with its function in other groups that have evolved the joint. This study builds on our understanding of the role of the IMJ during prey capture and provides insights into broader implications of the innovative trait.

scholarly journals Evolution of Upper Jaw Protrusion Mechanisms in Elasmobranchs

2001 ◽  
Vol 41 (6) ◽  
pp. 1248-1257 ◽  
Author(s):  
Cheryl D. Wilga ◽  
Robert E. Hueter ◽  
Peter C. Wainwright ◽  
Philip J. Motta
Keyword(s):  
Jaw Protrusion ◽  
Upper Jaw

scholarly journals Conservation and variation in the feeding mechanism of the spiny dogfish squalus acanthias

1998 ◽  
Vol 201 (9) ◽  
pp. 1345-1358 ◽  
Author(s):  
C Wilga ◽  
P Motta
Keyword(s):  
Motor Activity ◽  
Prey Capture ◽  
Squalus Acanthias ◽  
Head Movements ◽  
Spiny Dogfish ◽  
Lemon Shark ◽  
Feeding Mechanism ◽  
Lower Vertebrates ◽  
Jaw Protrusion ◽  
Upper Jaw

Changes in the feeding mechanism with feeding behavior were investigated using high-speed video and electromyography to examine the kinematics and motor pattern of prey capture, manipulation and transport in the spiny dogfish Squalus acanthias (Squalidae: Squaliformes). In this study, Squalus acanthias used both suction and ram behaviors to capture and manipulate prey, while only suction was used to transport prey. The basic kinematic feeding sequence observed in other aquatic-feeding lower vertebrates is conserved in the spiny dogfish. Prey capture, bite manipulation and suction transport events are characterized by a common pattern of head movements and motor activity, but are distinguishable by differences in duration and relative timing. In general, capture events are longer in duration than manipulation and transport events, as found in other aquatic-feeding lower vertebrates. Numerous individual effects were found, indicating that individual sharks are capable of varying head movements and motor activity among successful feeding events. Upper jaw protrusion in the spiny dogfish is not restricted by its orbitostylic jaw suspension; rather, the upper jaw is protruded by 30 % of its head length, considerably more than in the lemon shark Negaprion brevirostris (Carcharhinidae: Carcharhiniformes) (18 %) with its hyostylic jaw suspension. One function of upper jaw protrusion is to assist in jaw closure by protruding the upper jaw as well as elevating the lower jaw to close the gape, thus decreasing the time to jaw closure. The mechanism of upper jaw protrusion was found to differ between squaliform and carcharhiniform sharks. Whereas the levator palatoquadrati muscle assists in retracting the upper jaw in the spiny dogfish, it assists in protruding the upper jaw in the lemon shark. This study represents the first comprehensive electromyographic and kinematic analysis of the feeding mechanism in a squaliform shark.

Mechanics and Functions of Jaw Protrusion in Teleost Fishes: A Review

Copeia ◽  
1984 ◽  
Vol 1984 (1) ◽  
pp. 1 ◽  
Author(s):  
Philip Jay Motta
Keyword(s):  
Teleost Fishes ◽  
Jaw Protrusion

Evolution of the upper jaw mechanism in teleost fishes

1935 ◽  
Vol 58 (1) ◽  
pp. 157-172 ◽  
Author(s):  
Theodore H. Eaton
Keyword(s):  
Teleost Fishes ◽  
Upper Jaw

Characterization and evolution of spearfishing in Madeira archipelago, Eastern Atlantic

2020 ◽  
Vol 33 ◽  
pp. 15
Author(s):  
Roi Martínez-Escauriaza ◽  
Claudio Vieira ◽  
Lídia Gouveia ◽  
Nuno Gouveia ◽  
Margarida Hermida
Keyword(s):  
Fish Species ◽  
Young Men ◽  
Coastal Areas ◽  
Teleost Fishes ◽  
The North ◽  
Southeast Coast ◽  
Madeira Archipelago ◽  
First Time

Data obtained from licenses of spearfishers and surveys conducted in 2004 and 2017 allowed for the analysis, for the first time, of the practice of spearfishing in the Madeira archipelago. Only a small percentage of the population practices spearfishing, mostly local young men. Most of them practice the activity with a partner throughout most of the year and along most of the island's coastal areas, although preferentially along the North and Southeast coast. Results show how, in recent years, despite the population of spearfishers decreasing, the abundance in the annual catch potentially increased, probably due to the higher investment of time in this activity. It has been observed that many fishers complement their catches with manual collecting of invertebrates. Overall, 40 teleost fishes and also 4 crustaceans and 8 molluscs were identified. The most frequently captured fish species were parrotfish and white seabream, while limpets were the most collected invertebrates in both selected periods.

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