Acoustic and postural displays in a miniature and transparent teleost fish, Danionella dracula
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Abstract
Acoustic behavior is widespread across vertebrates, including fishes. We report robust acoustic displays during aggressive interactions for a laboratory colony of Danionella dracula, a miniature and transparent species of teleost fish closely related to zebrafish (Danio rerio), which are hypothesized to be sonic based on the presence of a hypertrophied muscle associated with the male swim bladder. Males produce bursts of pulsatile sounds and a distinct postural display – extension of a hypertrophied lower jaw, a morphological trait not present in other Danionella species – during aggressive but not courtship interactions. Females show no evidence of sound production or jaw extension in such contexts. Novel pairs of size-matched or -mismatched males were combined in resident–intruder assays where sound production and jaw extension could be linked to individuals. In both dyad contexts, resident males produced significantly more sound pulses than intruders. During heightened sonic activity, the majority of the highest sound producers also showed increased jaw extension. Residents extended their jaw more than intruders in size-matched but not -mismatched contexts. Larger males in size-mismatched dyads produced more sounds and jaw extensions compared with their smaller counterparts, and sounds and jaw extensions increased with increasing absolute body size. These studies establish D. dracula as a sonic species that modulates putatively acoustic and postural displays during aggressive interactions based on residency and body size, providing a foundation for further investigating the role of multimodal displays in a new model clade for neurogenomic and neuroimaging studies of aggression, courtship and other social interactions.
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This Zenodo record is a permanently preserved version of a PREreview. You can view the complete PREreview at https://prereview.org/reviews/6342480.
It is an interesting paper to read generally. The tilte of this study is "Acoustic and postural displays in a miniature and transparent teleost fish, Danionella dracula" In this study, the main research intent was to provide a behavioral baseline for studies of acoustic communication during social interactions in Danionella dracula, a miniature species of cypriniform fish. They describe sound production in D. dracula. They also found that males produce relatively simple, broadband sounds only during aggressive encounters and that females appear to be silent. The introduction part is completely clear, easy to read and catch up; Background studies, studied species and research aims were …
This Zenodo record is a permanently preserved version of a PREreview. You can view the complete PREreview at https://prereview.org/reviews/6342480.
It is an interesting paper to read generally. The tilte of this study is "Acoustic and postural displays in a miniature and transparent teleost fish, Danionella dracula" In this study, the main research intent was to provide a behavioral baseline for studies of acoustic communication during social interactions in Danionella dracula, a miniature species of cypriniform fish. They describe sound production in D. dracula. They also found that males produce relatively simple, broadband sounds only during aggressive encounters and that females appear to be silent. The introduction part is completely clear, easy to read and catch up; Background studies, studied species and research aims were straightforward and fluent. Although I would suggest, It might be worthwhile to separately categorize the aim of research and research questions in the last paragraph of the introduction accordingly. In the materials and methods part, the number of fish used (individually and/or in group tests) in the study is not clear yet and maybe in this section a graphic view of the experimental timeline per each part could add extra value and make it more clear for readers. The results part is clear and well-written and easy to follow. And finally, the discussion part addresses all results and measurements accordingly.
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