Calling activity and calls' temporal features inform about fish reproductive condition and spawning in three cultured Sciaenidae species

Bolgan, Marta; Crucianelli, Aurora; Mylonas, Cc; Henry, Séverine; Falguiere, JC; Parmentier, Éric

doi:10.1016/j.aquaculture.2020.735243

Cited by 30 publications

(39 citation statements)

References 68 publications

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“…In accordance with recent studies [ 41 – 43 ], it was here demonstrated that the meagre vocal repertoire is wider than previously thought [ 37 ]. Furthermore, fine acoustic features of grunts emitted during spawning nights are overall consistent between Portuguese and Mediterranean French populations [ 55 ].…”

Section: Discussionsupporting

confidence: 93%

“…The meagre (Argyrosomus regius, Asso 1801) is an interesting case because recent studies [41][42][43] suggest a wider vocal repertoire than previously described [37]. This species is widely distributed along the Atlantic coast of Europe and of Africa, as well as in the Mediterranean Sea [44] and has a significant commercial value for recreational and small-scale commercial fisheries, as well as aquaculture [45]; this implies that knowledge about meagre sound feature variability and consistency is imperative for populations monitoring over wide geographical and temporal scales.…”

Section: Introductionmentioning

confidence: 99%

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Vocal repertoire and consistency of call features in the meagre Argyrosomous regius (Asso, 1801)

et al. 2020

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Passive Acoustic Monitoring (PAM) is a non-intrusive and cost-effective method capable of providing high-resolution, long-term information on the status and health of vocal populations and communities. To successfully monitor the same species over wide geographical and temporal scales, it is necessary to characterise the range of sound variability, as well as the consistency of sound features between populations. The meagre (Argyrosomus regius, Asso 1801) is an interesting case study because recent investigations suggest a wider vocal repertoire than previously described. In this study, meagre vocalizations were recorded and analysed from a variety of settings, ranging from rearing facilities to wild populations to provide a comprehensive characterisation of its vocal repertoire, while investigating the consistency of spawning sound features between populations. All sounds presented a similar acoustic structure in their basic unit (i.e. the pulse), while an important variability was found in the number of pulses; the meagre can emit sounds made of one single pulse or many pulses (up to more than 100). High level of overlap in the Principal Component Analysis made difficult to differentiate sound type clusters. Despite this, two sound types were identifiable: knocks (sounds from 1 to 3 pulses) and long grunts (sounds with more than 29 pulses). Discriminant Analysis carried out on PCA residuals showed that knock had the highest proportion of correct placement (92% of the observations correctly placed) followed by long grunts (80%). All other previously described sound types (intermediate grunt, short grunt and disturbance sounds) could not be separated and presented low levels of correct placement, suggesting that care should be taken when defining these as independent sound types. Finally, acoustic features consistency was found in meagre grunts emitted by different populations during spawning nights; statistical differences could be explained by recording settings and fish conditions. The results of this study provide important information for fostering PAM programs of wild meagre populations, while contributing to the discussion around the definition of fish sound types in vocal fish communities. Studies of this kind, which evaluate both variability and consistency of sound features, are of fundamental importance for maximising PAM efforts in the wild, at both the specific and the community level.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Vocal repertoire and consistency of call features in the meagre Argyrosomous regius (Asso, 1801)

et al. 2020

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“…Similar to many sciaenids, B. microlepis produces calls in late afternoon into evening 2 – 4 , 6 , 15 , 27 – 30 . Calls are composed of a rapid series of pulses with a repetition rate of slightly > 100 pps.…”

Section: Discussionmentioning

confidence: 91%

“…Although calculations for the tank indicate a resonant frequency of 1029 Hz 39 , it is clear that sounds did not exhibit a strong peak at this frequency. Furthermore, recordings of characiform ( Prochilodus argenteus, P. costatus, P. lineatus ) and sciaenid ( Argyrosomus regius, Sciaenops ocellatus and Umbrina cirrosa ) fishes in cement tanks with relatively similar dimensions exhibited low frequency energy 6 , 40 . We therefore conclude that the call spectrum of B. microlepis is largely related to energy produced by the fish although it is affected by the environment.…”

Section: Discussionmentioning

confidence: 99%

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A sciaenid swim bladder with long skinny fingers produces sound with an unusual frequency spectrum

Mok

Sirisuary

et al. 2020

Sci Rep

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Swim bladders in sciaenid fishes function in hearing in some and sound production in almost all species. Sciaenid swim bladders vary from simple carrot-shaped to two-chambered to possessing various diverticula. Diverticula that terminate close to the ears improve hearing. Other unusual diverticula heading in a caudal direction have not been studied. The fresh-water Asian species Boesemania microlepis has an unusual swim bladder with a slightly restricted anterior region and 6 long-slender caudally-directed diverticula bilaterally. We hypothesized that these diverticula modify sound spectra. Evening advertisement calls consist of a series of multicycle tonal pulses, but the fundamental frequency and first several harmonics are missing or attenuated, and peak frequencies are high, varying between < 1–2 kHz. The fundamental frequency is reflected in the pulse repetition rate and in ripples on the frequency spectrum but not in the number of cycles within a pulse. We suggest that diverticula function as Helmholz absorbers turning the swim bladder into a high-pass filter responsible for the absence of low frequencies typically present in sciaenid calls. Further, we hypothesize that the multicycle pulses are driven by the stretched aponeuroses (flat tendons that connect the sonic muscles to the swim bladder) in this and other sciaenids.

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Sound features and vocal rhythms as a proxy for locating the spawning ground ofSciaena umbrain the wild

Picciulin

Fiorin

Facca

et al. 2020

Aquatic Conservation

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The brown meagre (Sciaena umbra) is a demersal sciaenid fish recognized as indicative of good environmental quality and is defined as an umbrella species for the ecological community of rocky coastal habitats. Sciaena umbra is classified as a Vulnerable fish species by the International Union for Conservation of Nature (IUCN) and knowledge on the distribution of its spawning habitats is essential for its conservation. Passive acoustic monitoring (PAM) is a suitable tool to monitor S. umbra distribution because of the high consistency, over space and time, of the communication sounds that this species emits during the reproductive period, with irregular or regular rhythms, or with calls merging into a chorus. During the summer of 2019, the presence of this species was investigated acoustically at 40 listening points distributed along the tidal inlets that connect the Venice lagoon with the open sea. Longer sounds, comprising a higher number of faster repeated pulses, were found during the chorus and were used as a proxy of spawning activity; similar sound features have been recorded in different captive Sciaenids during spawning. The three inlets were classified as more or less suitable for spawning on the basis of the vocal rhythms identified, demonstrating a clear preference along a north–south gradient and indicating higher spawning activity in the internal‐facing areas of the inlets, compared with the seaward‐facing areas. The chorus occurred in localized areas consistently throughout the breeding season, suggesting that spawning is concentrated in preferred areas. For the first time a relationship between the sound features and vocal rhythms of fish has been highlighted by an in situ study. This validates the use of the chorus as a reliable natural indicator of S. umbra breeding sites, and in turn suggests a potential non‐invasive approach based on PAM for mapping the key reproductive areas of this vulnerable species in the Mediterranean Sea.

show abstract

Calling activity and calls' temporal features inform about fish reproductive condition and spawning in three cultured Sciaenidae species

Cited by 30 publications

References 68 publications

Vocal repertoire and consistency of call features in the meagre Argyrosomous regius (Asso, 1801)

Vocal repertoire and consistency of call features in the meagre Argyrosomous regius (Asso, 1801)

A sciaenid swim bladder with long skinny fingers produces sound with an unusual frequency spectrum

Sound features and vocal rhythms as a proxy for locating the spawning ground ofSciaena umbrain the wild

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