The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Eric Parmentier - One of the best experts on this subject based on the ideXlab platform.
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sound production mechanism in triggerfish Balistidae a synapomorphy
The Journal of Experimental Biology, 2018Co-Authors: Xavier Raick, David Lecchini, Loic Kever, Orphal Colleye, Frederic Bertucci, Eric ParmentierAbstract:ABSTRACT The ability to produce sounds for acoustic communication is known in different Balistidae species but the eventual synapomorphic aspect of the mechanism remains to be shown. In Rhinecanthus aculeatus , sounds result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes against the swim bladder wall. In this study, we made a comparison between the sounds produced by this species and two additional ones ( Balistapus undulatus and Rhinecanthus rectangulus ) using hand-held specimens to provide a description of the sound mechanism. The results highlighted that the sound production mechanism is similar in the three species. According to recent phylogenetic data and shared morphological features, this mechanism could be common to the majority of Balistidae family members and all species could be capable of sound production using pectoral fins.
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Correction: Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae).
The Journal of Experimental Biology, 2017Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Sam Van Wassenbergh, Kelly S. Boyle, Loic KeverAbstract:There was an error published in J. Exp. Biol. 220 , [186-193][1]. The surname of Sam Van Wassenbergh was incorrectly displayed. This has been corrected in the online full-text and PDF versions. The authors apologise for any inconvenience this may have caused. [1]: /lookup/volpage/220/186?iss=2
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Circling and touching: two new behaviours in the courtship of the Picasso triggerfish Rhinecanthus aculeatus (Linnaeus, 1758)
Marine Biodiversity Records, 2017Co-Authors: Xavier Raick, David Lecchini, Eric ParmentierAbstract:The reproduction of Rhinecanthus aculeatus (Linnaeus, 1758), a tropical Indo-Pacific reef fish, occurs around the full and new moon (Kuwamura 1997). Spawning begins 16 to 45 min before the sunrise. The courtships begin 7 to 27 min before the spawning. A specific behaviour of the courtships is when the male places its rostrum against the caudal peduncle of the female (Kuwamura 1997). Observations have been recorded in the lagoon of Tiahura [shallow sandy area (0.5 - 2 m deep) with algae Hypnea spinella (C.Agardh) Kützing, 1847 - Moorea, French Polynesia; 17°29′27′ S, 149°53′32″O] in March and April 2015. Fifteen R. aculeatus (five males and ten females) lived in this area where the males have territories, which included the subterritories of the females. During video-recorded courtships, in addition to the behaviour described by Kuwamura (the nuzzling), two new behaviours have been observed: circling and touching. During the circling, the male and the female swim to the surface in progressively larger circles (Fig. 1). The circling behaviour has been observed in other Balistidae such as Pseudobalistes flavimarginatus (Rüppell, 1829) and Balistapus undulatus (Park, 1797) (Lobel and Johannes 1980). During the touching, the abdomens of the male and the female’s touch each other without gametes emission (Fig. 2). The touching has been reported for Xanthichthys mento (Jordan and Gilbert 1882) (Kawase 2003). Although Balistidae present different reproductive strategies, they have common reproduction features, such as the time and the day of hatching and spawning (Kawase 2003). Our observations are innovative because the courtship of R. aculeatus is more complicated than previously described. This result suggests, thus, that Balistidae have also some common courtship behaviour features. These behaviours may facilitate the release of gametes, as with the nuzzling (Kuwamura 1997) or can convince the partner to mate. We do not know if these patterns are phylogenetically related. But as the egg care strategy of Balistidae (biparental vs maternal) appears to be related to the distribution of food and breeding sites, more than by the phylogeny (Kuwamura 1997), more studies on this topic will be useful to better understand the establishement of these behaviours.
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Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae)
Journal of Experimental Biology, 2017Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Kelly Boyle, Sam Van Wassenbergh, Loic KeverAbstract:The ability to produce sound has been known for decades in Balistidae. Sounds of many species have been recorded and a variety of sound-producing mechanisms have been proposed, including teeth stridulation, collision of the buccal teeth and movements of the fins. The best-supported hypothesis involves movements of the pectoral fin against the lateral part of the swimbladder, called a drumming membrane. In this study, we describe for the first time the sounds made by the blackbar triggerfish Rhinecanthus aculeatus, which are like short drum rolls with an average duration of 85 ms, 193 Hz dominant frequency and 136 dB SPL level at 3 cm distance. The sounds are a series of pulses that result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes that are forced against the swimbladder wall. Pulses from each fin occur in consecutive pairs. High-speed videos indicate that each pulse consists of two cycles. The first part of each cycle corresponds to the inward buckling of the scutes, whereas the second part of the cycle corresponds to an apparent passive recoil of the scutes and swimbladder wall. This novel sound production mechanism is probably found in many members of Balistidae because these peculiar scutes occur in other species in the family. Comparison of sound characteristics from fishes of different sizes shows that dominant frequency decreases with size in juveniles but not in adults. KEY WORDS: Acoustic, Communication, Swimbladder
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Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae)
The Journal of Experimental Biology, 2016Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Kelly S. Boyle, Sam Vanwassenbergh, Loic KeverAbstract:ABSTRACT The ability to produce sound has been known for decades in Balistidae. Sounds of many species have been recorded and a variety of sound-producing mechanisms have been proposed, including teeth stridulation, collision of the buccal teeth and movements of the fins. The best-supported hypothesis involves movements of the pectoral fin against the lateral part of the swimbladder, called a drumming membrane. In this study, we describe for the first time the sounds made by the blackbar triggerfish Rhinecanthus aculeatus, which are like short drum rolls with an average duration of 85 ms, 193 Hz dominant frequency and 136 dB SPL level at 3 cm distance. The sounds are a series of pulses that result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes that are forced against the swimbladder wall. Pulses from each fin occur in consecutive pairs. High-speed videos indicate that each pulse consists of two cycles. The first part of each cycle corresponds to the inward buckling of the scutes, whereas the second part of the cycle corresponds to an apparent passive recoil of the scutes and swimbladder wall. This novel sound production mechanism is probably found in many members of Balistidae because these peculiar scutes occur in other species in the family. Comparison of sound characteristics from fishes of different sizes shows that dominant frequency decreases with size in juveniles but not in adults.
Loic Kever - One of the best experts on this subject based on the ideXlab platform.
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sound production mechanism in triggerfish Balistidae a synapomorphy
The Journal of Experimental Biology, 2018Co-Authors: Xavier Raick, David Lecchini, Loic Kever, Orphal Colleye, Frederic Bertucci, Eric ParmentierAbstract:ABSTRACT The ability to produce sounds for acoustic communication is known in different Balistidae species but the eventual synapomorphic aspect of the mechanism remains to be shown. In Rhinecanthus aculeatus , sounds result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes against the swim bladder wall. In this study, we made a comparison between the sounds produced by this species and two additional ones ( Balistapus undulatus and Rhinecanthus rectangulus ) using hand-held specimens to provide a description of the sound mechanism. The results highlighted that the sound production mechanism is similar in the three species. According to recent phylogenetic data and shared morphological features, this mechanism could be common to the majority of Balistidae family members and all species could be capable of sound production using pectoral fins.
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Correction: Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae).
The Journal of Experimental Biology, 2017Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Sam Van Wassenbergh, Kelly S. Boyle, Loic KeverAbstract:There was an error published in J. Exp. Biol. 220 , [186-193][1]. The surname of Sam Van Wassenbergh was incorrectly displayed. This has been corrected in the online full-text and PDF versions. The authors apologise for any inconvenience this may have caused. [1]: /lookup/volpage/220/186?iss=2
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Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae)
Journal of Experimental Biology, 2017Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Kelly Boyle, Sam Van Wassenbergh, Loic KeverAbstract:The ability to produce sound has been known for decades in Balistidae. Sounds of many species have been recorded and a variety of sound-producing mechanisms have been proposed, including teeth stridulation, collision of the buccal teeth and movements of the fins. The best-supported hypothesis involves movements of the pectoral fin against the lateral part of the swimbladder, called a drumming membrane. In this study, we describe for the first time the sounds made by the blackbar triggerfish Rhinecanthus aculeatus, which are like short drum rolls with an average duration of 85 ms, 193 Hz dominant frequency and 136 dB SPL level at 3 cm distance. The sounds are a series of pulses that result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes that are forced against the swimbladder wall. Pulses from each fin occur in consecutive pairs. High-speed videos indicate that each pulse consists of two cycles. The first part of each cycle corresponds to the inward buckling of the scutes, whereas the second part of the cycle corresponds to an apparent passive recoil of the scutes and swimbladder wall. This novel sound production mechanism is probably found in many members of Balistidae because these peculiar scutes occur in other species in the family. Comparison of sound characteristics from fishes of different sizes shows that dominant frequency decreases with size in juveniles but not in adults. KEY WORDS: Acoustic, Communication, Swimbladder
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Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae)
The Journal of Experimental Biology, 2016Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Kelly S. Boyle, Sam Vanwassenbergh, Loic KeverAbstract:ABSTRACT The ability to produce sound has been known for decades in Balistidae. Sounds of many species have been recorded and a variety of sound-producing mechanisms have been proposed, including teeth stridulation, collision of the buccal teeth and movements of the fins. The best-supported hypothesis involves movements of the pectoral fin against the lateral part of the swimbladder, called a drumming membrane. In this study, we describe for the first time the sounds made by the blackbar triggerfish Rhinecanthus aculeatus, which are like short drum rolls with an average duration of 85 ms, 193 Hz dominant frequency and 136 dB SPL level at 3 cm distance. The sounds are a series of pulses that result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes that are forced against the swimbladder wall. Pulses from each fin occur in consecutive pairs. High-speed videos indicate that each pulse consists of two cycles. The first part of each cycle corresponds to the inward buckling of the scutes, whereas the second part of the cycle corresponds to an apparent passive recoil of the scutes and swimbladder wall. This novel sound production mechanism is probably found in many members of Balistidae because these peculiar scutes occur in other species in the family. Comparison of sound characteristics from fishes of different sizes shows that dominant frequency decreases with size in juveniles but not in adults.
Xavier Raick - One of the best experts on this subject based on the ideXlab platform.
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sound production mechanism in triggerfish Balistidae a synapomorphy
The Journal of Experimental Biology, 2018Co-Authors: Xavier Raick, David Lecchini, Loic Kever, Orphal Colleye, Frederic Bertucci, Eric ParmentierAbstract:ABSTRACT The ability to produce sounds for acoustic communication is known in different Balistidae species but the eventual synapomorphic aspect of the mechanism remains to be shown. In Rhinecanthus aculeatus , sounds result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes against the swim bladder wall. In this study, we made a comparison between the sounds produced by this species and two additional ones ( Balistapus undulatus and Rhinecanthus rectangulus ) using hand-held specimens to provide a description of the sound mechanism. The results highlighted that the sound production mechanism is similar in the three species. According to recent phylogenetic data and shared morphological features, this mechanism could be common to the majority of Balistidae family members and all species could be capable of sound production using pectoral fins.
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Correction: Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae).
The Journal of Experimental Biology, 2017Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Sam Van Wassenbergh, Kelly S. Boyle, Loic KeverAbstract:There was an error published in J. Exp. Biol. 220 , [186-193][1]. The surname of Sam Van Wassenbergh was incorrectly displayed. This has been corrected in the online full-text and PDF versions. The authors apologise for any inconvenience this may have caused. [1]: /lookup/volpage/220/186?iss=2
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Circling and touching: two new behaviours in the courtship of the Picasso triggerfish Rhinecanthus aculeatus (Linnaeus, 1758)
Marine Biodiversity Records, 2017Co-Authors: Xavier Raick, David Lecchini, Eric ParmentierAbstract:The reproduction of Rhinecanthus aculeatus (Linnaeus, 1758), a tropical Indo-Pacific reef fish, occurs around the full and new moon (Kuwamura 1997). Spawning begins 16 to 45 min before the sunrise. The courtships begin 7 to 27 min before the spawning. A specific behaviour of the courtships is when the male places its rostrum against the caudal peduncle of the female (Kuwamura 1997). Observations have been recorded in the lagoon of Tiahura [shallow sandy area (0.5 - 2 m deep) with algae Hypnea spinella (C.Agardh) Kützing, 1847 - Moorea, French Polynesia; 17°29′27′ S, 149°53′32″O] in March and April 2015. Fifteen R. aculeatus (five males and ten females) lived in this area where the males have territories, which included the subterritories of the females. During video-recorded courtships, in addition to the behaviour described by Kuwamura (the nuzzling), two new behaviours have been observed: circling and touching. During the circling, the male and the female swim to the surface in progressively larger circles (Fig. 1). The circling behaviour has been observed in other Balistidae such as Pseudobalistes flavimarginatus (Rüppell, 1829) and Balistapus undulatus (Park, 1797) (Lobel and Johannes 1980). During the touching, the abdomens of the male and the female’s touch each other without gametes emission (Fig. 2). The touching has been reported for Xanthichthys mento (Jordan and Gilbert 1882) (Kawase 2003). Although Balistidae present different reproductive strategies, they have common reproduction features, such as the time and the day of hatching and spawning (Kawase 2003). Our observations are innovative because the courtship of R. aculeatus is more complicated than previously described. This result suggests, thus, that Balistidae have also some common courtship behaviour features. These behaviours may facilitate the release of gametes, as with the nuzzling (Kuwamura 1997) or can convince the partner to mate. We do not know if these patterns are phylogenetically related. But as the egg care strategy of Balistidae (biparental vs maternal) appears to be related to the distribution of food and breeding sites, more than by the phylogeny (Kuwamura 1997), more studies on this topic will be useful to better understand the establishement of these behaviours.
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Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae)
Journal of Experimental Biology, 2017Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Kelly Boyle, Sam Van Wassenbergh, Loic KeverAbstract:The ability to produce sound has been known for decades in Balistidae. Sounds of many species have been recorded and a variety of sound-producing mechanisms have been proposed, including teeth stridulation, collision of the buccal teeth and movements of the fins. The best-supported hypothesis involves movements of the pectoral fin against the lateral part of the swimbladder, called a drumming membrane. In this study, we describe for the first time the sounds made by the blackbar triggerfish Rhinecanthus aculeatus, which are like short drum rolls with an average duration of 85 ms, 193 Hz dominant frequency and 136 dB SPL level at 3 cm distance. The sounds are a series of pulses that result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes that are forced against the swimbladder wall. Pulses from each fin occur in consecutive pairs. High-speed videos indicate that each pulse consists of two cycles. The first part of each cycle corresponds to the inward buckling of the scutes, whereas the second part of the cycle corresponds to an apparent passive recoil of the scutes and swimbladder wall. This novel sound production mechanism is probably found in many members of Balistidae because these peculiar scutes occur in other species in the family. Comparison of sound characteristics from fishes of different sizes shows that dominant frequency decreases with size in juveniles but not in adults. KEY WORDS: Acoustic, Communication, Swimbladder
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Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae)
The Journal of Experimental Biology, 2016Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Kelly S. Boyle, Sam Vanwassenbergh, Loic KeverAbstract:ABSTRACT The ability to produce sound has been known for decades in Balistidae. Sounds of many species have been recorded and a variety of sound-producing mechanisms have been proposed, including teeth stridulation, collision of the buccal teeth and movements of the fins. The best-supported hypothesis involves movements of the pectoral fin against the lateral part of the swimbladder, called a drumming membrane. In this study, we describe for the first time the sounds made by the blackbar triggerfish Rhinecanthus aculeatus, which are like short drum rolls with an average duration of 85 ms, 193 Hz dominant frequency and 136 dB SPL level at 3 cm distance. The sounds are a series of pulses that result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes that are forced against the swimbladder wall. Pulses from each fin occur in consecutive pairs. High-speed videos indicate that each pulse consists of two cycles. The first part of each cycle corresponds to the inward buckling of the scutes, whereas the second part of the cycle corresponds to an apparent passive recoil of the scutes and swimbladder wall. This novel sound production mechanism is probably found in many members of Balistidae because these peculiar scutes occur in other species in the family. Comparison of sound characteristics from fishes of different sizes shows that dominant frequency decreases with size in juveniles but not in adults.
Frederic Bertucci - One of the best experts on this subject based on the ideXlab platform.
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sound production mechanism in triggerfish Balistidae a synapomorphy
The Journal of Experimental Biology, 2018Co-Authors: Xavier Raick, David Lecchini, Loic Kever, Orphal Colleye, Frederic Bertucci, Eric ParmentierAbstract:ABSTRACT The ability to produce sounds for acoustic communication is known in different Balistidae species but the eventual synapomorphic aspect of the mechanism remains to be shown. In Rhinecanthus aculeatus , sounds result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes against the swim bladder wall. In this study, we made a comparison between the sounds produced by this species and two additional ones ( Balistapus undulatus and Rhinecanthus rectangulus ) using hand-held specimens to provide a description of the sound mechanism. The results highlighted that the sound production mechanism is similar in the three species. According to recent phylogenetic data and shared morphological features, this mechanism could be common to the majority of Balistidae family members and all species could be capable of sound production using pectoral fins.
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Correction: Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae).
The Journal of Experimental Biology, 2017Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Sam Van Wassenbergh, Kelly S. Boyle, Loic KeverAbstract:There was an error published in J. Exp. Biol. 220 , [186-193][1]. The surname of Sam Van Wassenbergh was incorrectly displayed. This has been corrected in the online full-text and PDF versions. The authors apologise for any inconvenience this may have caused. [1]: /lookup/volpage/220/186?iss=2
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Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae)
Journal of Experimental Biology, 2017Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Kelly Boyle, Sam Van Wassenbergh, Loic KeverAbstract:The ability to produce sound has been known for decades in Balistidae. Sounds of many species have been recorded and a variety of sound-producing mechanisms have been proposed, including teeth stridulation, collision of the buccal teeth and movements of the fins. The best-supported hypothesis involves movements of the pectoral fin against the lateral part of the swimbladder, called a drumming membrane. In this study, we describe for the first time the sounds made by the blackbar triggerfish Rhinecanthus aculeatus, which are like short drum rolls with an average duration of 85 ms, 193 Hz dominant frequency and 136 dB SPL level at 3 cm distance. The sounds are a series of pulses that result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes that are forced against the swimbladder wall. Pulses from each fin occur in consecutive pairs. High-speed videos indicate that each pulse consists of two cycles. The first part of each cycle corresponds to the inward buckling of the scutes, whereas the second part of the cycle corresponds to an apparent passive recoil of the scutes and swimbladder wall. This novel sound production mechanism is probably found in many members of Balistidae because these peculiar scutes occur in other species in the family. Comparison of sound characteristics from fishes of different sizes shows that dominant frequency decreases with size in juveniles but not in adults. KEY WORDS: Acoustic, Communication, Swimbladder
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Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae)
The Journal of Experimental Biology, 2016Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Kelly S. Boyle, Sam Vanwassenbergh, Loic KeverAbstract:ABSTRACT The ability to produce sound has been known for decades in Balistidae. Sounds of many species have been recorded and a variety of sound-producing mechanisms have been proposed, including teeth stridulation, collision of the buccal teeth and movements of the fins. The best-supported hypothesis involves movements of the pectoral fin against the lateral part of the swimbladder, called a drumming membrane. In this study, we describe for the first time the sounds made by the blackbar triggerfish Rhinecanthus aculeatus, which are like short drum rolls with an average duration of 85 ms, 193 Hz dominant frequency and 136 dB SPL level at 3 cm distance. The sounds are a series of pulses that result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes that are forced against the swimbladder wall. Pulses from each fin occur in consecutive pairs. High-speed videos indicate that each pulse consists of two cycles. The first part of each cycle corresponds to the inward buckling of the scutes, whereas the second part of the cycle corresponds to an apparent passive recoil of the scutes and swimbladder wall. This novel sound production mechanism is probably found in many members of Balistidae because these peculiar scutes occur in other species in the family. Comparison of sound characteristics from fishes of different sizes shows that dominant frequency decreases with size in juveniles but not in adults.
David Lecchini - One of the best experts on this subject based on the ideXlab platform.
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sound production mechanism in triggerfish Balistidae a synapomorphy
The Journal of Experimental Biology, 2018Co-Authors: Xavier Raick, David Lecchini, Loic Kever, Orphal Colleye, Frederic Bertucci, Eric ParmentierAbstract:ABSTRACT The ability to produce sounds for acoustic communication is known in different Balistidae species but the eventual synapomorphic aspect of the mechanism remains to be shown. In Rhinecanthus aculeatus , sounds result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes against the swim bladder wall. In this study, we made a comparison between the sounds produced by this species and two additional ones ( Balistapus undulatus and Rhinecanthus rectangulus ) using hand-held specimens to provide a description of the sound mechanism. The results highlighted that the sound production mechanism is similar in the three species. According to recent phylogenetic data and shared morphological features, this mechanism could be common to the majority of Balistidae family members and all species could be capable of sound production using pectoral fins.
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Correction: Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae).
The Journal of Experimental Biology, 2017Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Sam Van Wassenbergh, Kelly S. Boyle, Loic KeverAbstract:There was an error published in J. Exp. Biol. 220 , [186-193][1]. The surname of Sam Van Wassenbergh was incorrectly displayed. This has been corrected in the online full-text and PDF versions. The authors apologise for any inconvenience this may have caused. [1]: /lookup/volpage/220/186?iss=2
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Circling and touching: two new behaviours in the courtship of the Picasso triggerfish Rhinecanthus aculeatus (Linnaeus, 1758)
Marine Biodiversity Records, 2017Co-Authors: Xavier Raick, David Lecchini, Eric ParmentierAbstract:The reproduction of Rhinecanthus aculeatus (Linnaeus, 1758), a tropical Indo-Pacific reef fish, occurs around the full and new moon (Kuwamura 1997). Spawning begins 16 to 45 min before the sunrise. The courtships begin 7 to 27 min before the spawning. A specific behaviour of the courtships is when the male places its rostrum against the caudal peduncle of the female (Kuwamura 1997). Observations have been recorded in the lagoon of Tiahura [shallow sandy area (0.5 - 2 m deep) with algae Hypnea spinella (C.Agardh) Kützing, 1847 - Moorea, French Polynesia; 17°29′27′ S, 149°53′32″O] in March and April 2015. Fifteen R. aculeatus (five males and ten females) lived in this area where the males have territories, which included the subterritories of the females. During video-recorded courtships, in addition to the behaviour described by Kuwamura (the nuzzling), two new behaviours have been observed: circling and touching. During the circling, the male and the female swim to the surface in progressively larger circles (Fig. 1). The circling behaviour has been observed in other Balistidae such as Pseudobalistes flavimarginatus (Rüppell, 1829) and Balistapus undulatus (Park, 1797) (Lobel and Johannes 1980). During the touching, the abdomens of the male and the female’s touch each other without gametes emission (Fig. 2). The touching has been reported for Xanthichthys mento (Jordan and Gilbert 1882) (Kawase 2003). Although Balistidae present different reproductive strategies, they have common reproduction features, such as the time and the day of hatching and spawning (Kawase 2003). Our observations are innovative because the courtship of R. aculeatus is more complicated than previously described. This result suggests, thus, that Balistidae have also some common courtship behaviour features. These behaviours may facilitate the release of gametes, as with the nuzzling (Kuwamura 1997) or can convince the partner to mate. We do not know if these patterns are phylogenetically related. But as the egg care strategy of Balistidae (biparental vs maternal) appears to be related to the distribution of food and breeding sites, more than by the phylogeny (Kuwamura 1997), more studies on this topic will be useful to better understand the establishement of these behaviours.
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Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae)
Journal of Experimental Biology, 2017Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Kelly Boyle, Sam Van Wassenbergh, Loic KeverAbstract:The ability to produce sound has been known for decades in Balistidae. Sounds of many species have been recorded and a variety of sound-producing mechanisms have been proposed, including teeth stridulation, collision of the buccal teeth and movements of the fins. The best-supported hypothesis involves movements of the pectoral fin against the lateral part of the swimbladder, called a drumming membrane. In this study, we describe for the first time the sounds made by the blackbar triggerfish Rhinecanthus aculeatus, which are like short drum rolls with an average duration of 85 ms, 193 Hz dominant frequency and 136 dB SPL level at 3 cm distance. The sounds are a series of pulses that result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes that are forced against the swimbladder wall. Pulses from each fin occur in consecutive pairs. High-speed videos indicate that each pulse consists of two cycles. The first part of each cycle corresponds to the inward buckling of the scutes, whereas the second part of the cycle corresponds to an apparent passive recoil of the scutes and swimbladder wall. This novel sound production mechanism is probably found in many members of Balistidae because these peculiar scutes occur in other species in the family. Comparison of sound characteristics from fishes of different sizes shows that dominant frequency decreases with size in juveniles but not in adults. KEY WORDS: Acoustic, Communication, Swimbladder
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Unusual sound production mechanism in the triggerfish Rhinecanthus aculeatus (Balistidae)
The Journal of Experimental Biology, 2016Co-Authors: Eric Parmentier, Xavier Raick, David Lecchini, Frederic Bertucci, Kelly S. Boyle, Sam Vanwassenbergh, Loic KeverAbstract:ABSTRACT The ability to produce sound has been known for decades in Balistidae. Sounds of many species have been recorded and a variety of sound-producing mechanisms have been proposed, including teeth stridulation, collision of the buccal teeth and movements of the fins. The best-supported hypothesis involves movements of the pectoral fin against the lateral part of the swimbladder, called a drumming membrane. In this study, we describe for the first time the sounds made by the blackbar triggerfish Rhinecanthus aculeatus, which are like short drum rolls with an average duration of 85 ms, 193 Hz dominant frequency and 136 dB SPL level at 3 cm distance. The sounds are a series of pulses that result from alternate sweeping movements of the right and left pectoral fins, which push a system of three scutes that are forced against the swimbladder wall. Pulses from each fin occur in consecutive pairs. High-speed videos indicate that each pulse consists of two cycles. The first part of each cycle corresponds to the inward buckling of the scutes, whereas the second part of the cycle corresponds to an apparent passive recoil of the scutes and swimbladder wall. This novel sound production mechanism is probably found in many members of Balistidae because these peculiar scutes occur in other species in the family. Comparison of sound characteristics from fishes of different sizes shows that dominant frequency decreases with size in juveniles but not in adults.
