Sound‐generating and ‐detecting motor system in catfish: Design of swimbladder muscles in doradids and pimelodids

Ladich, Friedrich

doi:10.1002/ar.1105

Cited by 39 publications

(45 citation statements)

References 32 publications

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“…Lastly, the non-electrogenic, vocal species S. grandiops, has the greatest myofibril area and possesses features associated with fast sonic muscles of other fishes [2,40]: ribbon-shaped myofibrils, a well-developed sarcoplasmic reticulium, cores of sarcoplasm and whorl bodies. These features of S. grandiops are common to sonic muscles of distantly related catfishes, though the sarcoplasmic reticulum may be less developed than in Doradidae and Pimelodidae [47].…”

Section: Discussionmentioning

confidence: 86%

Sound production to electric discharge: sonic muscle evolution in progress inSynodontisspp. catfishes (Mochokidae)

2014

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Elucidating the origins of complex biological structures has been one of the major challenges of evolutionary studies. Within vertebrates, the capacity to produce regular coordinated electric organ discharges (EODs) has evolved independently in different fish lineages. Intermediate stages, however, are not known. We show that, within a single catfish genus, some species are able to produce sounds, electric discharges or both signals (though not simultaneously). We highlight that both acoustic and electric communication result from actions of the same muscle. In parallel to their abilities, the studied species show different degrees of myofibril development in the sonic and electric muscle. The lowest myofibril density was observed in Synodontis nigriventris , which produced EODs but no swim bladder sounds, whereas the greatest myofibril density was observed in Synodontis grandiops , the species that produced the longest sound trains but did not emit EODs. Additionally, S. grandiops exhibited the lowest auditory thresholds. Swim bladder sounds were similar among species, while EODs were distinctive at the species level. We hypothesize that communication with conspecifics favoured the development of species-specific EOD signals and suggest an evolutionary explanation for the transition from a fast sonic muscle to electrocytes.

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Section: Discussionmentioning

confidence: 86%

Sound production to electric discharge: sonic muscle evolution in progress inSynodontisspp. catfishes (Mochokidae)

2014

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“…67). Although other authors (e.g., Sörensen, 1895;Ladich, 2001) already had mentioned one of these exclusive characters, the ligament between the Müllerian ramus and the lateral line, they have never treated it as a synapomorphy for the whole family. This feature is revealed to be an exclusive character present in all examined doradids.…”

Section: Discussionmentioning

confidence: 99%

“…In the species of Mochokidae, the Müllerian ramus is modified with a long thin base and rounded distal disc, the latter attached to the ventral face of the gas bladder ( Fig. 35f; Vigliotta, 2008;Ladich, 2001). In the species of Malapteruridae and Pangasiidae, the Müllerian ramus is similar to the one present in mochokids, although it is more rectangular and elongate than disc-like (state 2).…”

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confidence: 99%

“…In the Mochokidae, the protractor muscle of the Müllerian ramus originates on the posterior nuchal plate and inserts on the base of the Müllerian ramus ( Fig. 56c; Taverne & AloulouTriki, 1976;Ladich, 2001). In the Ariidae (except Galeichthys), Malapteruridae and Pangasiidae, it originates on the lateral portion of the posterior cranium (including the epiotic process in most ariids), and inserts on the entire Müllerian ramus ( Fig.…”

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confidence: 99%

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Phylogenetic relationships of the South American Doradoidea (Ostariophysi: Siluriformes)

Birindelli¹

2014

Neotrop. ichthyol.

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A phylogenetic analysis based on 311 morphological characters is presented for most species of the Doradidae, all genera of the Auchenipteridae, and representatives of 16 other catfish families. The hypothesis that was derived from the six most parsimonious trees support the monophyly of the South American Doradoidea (Doradidae plus Auchenipteridae), as well as the monophyly of the clade Doradoidea plus the African Mochokidae. In addition, the clade with Sisoroidea plus Aspredinidae was considered sister to Doradoidea plus Mochokidae. Within the Auchenipteridae, the results support the monophyly of the Centromochlinae and Auchenipterinae. The latter is composed of Tocantinsia, and four monophyletic units, two small with Asterophysus and Liosomadoras, and Pseudotatia and Pseudauchenipterus, respectively, and two large ones with the remaining genera. Within the Doradidae, parsimony analysis recovered Wertheimeria as sister to Kalyptodoras, composing a clade sister to all remaining doradids, which include Franciscodoras and two monophyletic groups: Astrodoradinae (plus Acanthodoras and Agamyxis) and Doradinae (new arrangement). Wertheimerinae, new subfamily, is described for Kalyptodoras and Wertheimeria. Doradinae is corroborated as monophyletic and composed of four groups, one including Centrochir and Platydoras, the other with the large-size species of doradids (except Oxydoras), another with Orinocodoras, Rhinodoras, and Rhynchodoras, and another with Oxydoras plus all the fimbriate-barbel doradids. Based on the results, the species of Opsodoras are included in Hemidoras; and Tenellus, new genus, is described to include Nemadoras trimaculatus, N. leporhinus and Nemadoras ternetzi. Due to conflicting hypotheses of the phylogenetic position of Acanthodoras, Agamyxis, and Franciscodoras, these are considered as incertae sedis in Doradidae. All suprageneric taxa of the Doradoidea are diagnosed based on synapomorphic morphological characteristics.Uma análise filogenética com base em 311 caracteres morfológicos é apresentada para a maioria das espécies de Doradidae, todos os gêneros de Auchenipteridae e representantes de outras 16 famílias de Siluriformes. A hipótese de consenso entre as seis árvores mais parcimoniosas corrobora o monofiletismo do grupo Sul-americano Doradoidea (Doradidae mais Auchenipteridae), bem como o de Doradoidea mais a família Africana Mochokidae. O clado de Sisoroidea mais Aspredinidae é considerado como grupo-irmão de Doradoidea mais Mochokidae. Dentre os Auchenipteridae, os resultados corroboraram o monofiletismo de Centromochlinae e Auchenipterinae. Esta última inclui Tocantinsia e outros quarto grupos monofiléticos, um com Asterophysus e Liosomadoras, um com Pseudotatia e Pseudauchenipterus, e outros dois maiores com os demais gêneros da subfamília. Dentre os Doradidae, a análise de parcimônia recuperou Wertheimeria como grupo-irmão de Kalyptodoras, formando um clado irmão de todos os demais doradídeos, que incluem Franciscodoras e dois grupos: Astrodoradinae (mais Acanthodoras e Agamyxis...

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“…Doradids are known to produce two different sound types: stridulation sounds with their pectoral fins by abducting and adducting them, and drumming sounds which are produced by the elastic spring, a thin disc-shaped bony plate, which vibrates the swimbladder via fast contractions of drumming muscles (contractor muscles) (Kastberger, 1977;Ladich, 2001; for a review, see Fine and Ladich, 2003). Doradids are known to be active sound producers in disturbance situations such as when being hand held (Pfeiffer and Eisenberg, 1965;Kastberger, 1977;Ladich, 1997;Kaatz, 1999;Heyd and Pfeiffer, 2000;Kaatz and Stewart, 2012).…”

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confidence: 99%

Distress sounds of thorny catfishes emitted underwater and in air:characteristics and potential significance

Knight

Ladich

2014

Journal of Experimental Biology

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Thorny catfishes produce stridulation (SR) sounds using their pectoral fins and drumming (DR) sounds via a swimbladder mechanism in distress situations when hand held in water and in air. It has been argued that SR and DR sounds are aimed at different receivers (predators) in different media. The aim of this study was to analyse and compare sounds emitted in both air and water in order to test different hypotheses on the functional significance of distress sounds. Five representatives of the family Doradidae were investigated. Fish were hand held and sounds emitted in air and underwater were recorded (number of sounds, sound duration, dominant and fundamental frequency, sound pressure level and peak-to-peak amplitudes). All species produced SR sounds in both media, but DR sounds could not be recorded in air for two species. Differences in sound characteristics between media were small and mainly limited to spectral differences in SR. The number of sounds emitted decreased over time, whereas the duration of SR sounds increased. The dominant frequency of SR and the fundamental frequency of DR decreased and sound pressure level of SR increased with body size across species. The hypothesis that catfish produce more SR sounds in air and more DR sounds in water as a result of different predation pressure (birds versus fish) could not be confirmed. It is assumed that SR sounds serve as distress sounds in both media, whereas DR sounds might primarily be used as intraspecific communication signals in water in species possessing both mechanisms.

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Sound‐generating and ‐detecting motor system in catfish: Design of swimbladder muscles in doradids and pimelodids

Cited by 39 publications

References 32 publications

Sound production to electric discharge: sonic muscle evolution in progress inSynodontisspp. catfishes (Mochokidae)

Sound production to electric discharge: sonic muscle evolution in progress inSynodontisspp. catfishes (Mochokidae)

Phylogenetic relationships of the South American Doradoidea (Ostariophysi: Siluriformes)

Distress sounds of thorny catfishes emitted underwater and in air:characteristics and potential significance

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