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Added another paragraph :)

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Inlcuded a pretty important paper.
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j-hartling
2026-01-12 17:21:21 +01:00
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@@ -93,9 +93,8 @@ formalization of the underlying structures and mechanisms.
One sensory system about which extensive information has been gathered over the
years is the auditory system of grasshoppers~(\textit{Acrididae}). Grasshoppers
rely on their sense of hearing primarily for intraspecific communication, which
includes mate attraction and
evaluation~(\bcite{helversen1972gesang}, \bcite{helversen1993absolute},
\bcite{helversen1997recognition}), sender
includes mate attraction and evaluation~(\bcite{helversen1972gesang},
\bcite{helversen1993absolute}, \bcite{helversen1997recognition}), sender
localization~(\bcite{helversen1988interaural}), courtship display~(SOURCE),
rival deterrence~(\bcite{greenfield1993acoustic}), and loss-of-signal predator
alarm~(SOURCE). In accordance with this rich behavioral repertoire,
@@ -108,32 +107,37 @@ males of the species --- to potential mates within range. These songs are
usually more characteristic of a species than morphological
traits~(\bcite{tishechkin2016acoustic}, \bcite{tarasova2021eurasius}), which
can vary greatly within species~(\bcite{rowell1972variable},
\bcite{kohler2017morphological}). The reliance on acoustic signals to mediate
reproduction represents a strong evolutionary driving force, that resulted in a
massive species diversification~(\bcite{vedenina2011speciation},
\bcite{kohler2017morphological}). The reliance on songs to mediate reproduction
represents a strong evolutionary driving force, that resulted in a massive
species diversification~(\bcite{vedenina2011speciation},
\bcite{sevastianov2023evolution}), with over 6800 recognized grasshopper
species in the \textit{Acrididae} family~(\bcite{cigliano2024orthoptera}). It
is this diversity of species, and the crucial role of acoustic communication in
its emergence, that makes the grasshopper auditory system an intriguing
candidate for attempting to construct a functional model framework. For
simplicity, we focus on the pathway responsible for the recognition of
species-specific calling songs, disregarding other auditory functions such as
directional hearing~(\bcite{helversen1984parallel}, \bcite{ronacher1986routes},
candidate for attempting to construct a functional model framework. As a
necessary reduction, the model we propose here focuses on the pathway
responsible for the recognition of species-specific calling songs, disregarding
other auditory functions such as directional
hearing~(\bcite{helversen1984parallel}, \bcite{ronacher1986routes},
\bcite{helversen1988interaural}).
The characteristic calling songs are
produced by stridulation, during which the grasshopper pulls the serrated
stridulatory file on its hindlegs across a resonating vein on the
To understand the functional challenges faced by the grasshopper auditory
system, one has to understand the properties of the songs it is designed to
recognize. Grasshopper songs are amplitude-modulated broad-band acoustic
signals. Most songs are produced by stridulation, during which the animal pulls
the serrated stridulatory file on its hindlegs across a resonating vein on the
forewings~(\bcite{helversen1977stridulatory}, \bcite{stumpner1994song},
\bcite{helversen1997recognition}).
\bcite{helversen1997recognition}). Every tooth that strikes the vein generates
a brief pulse of sound. Multiple pulses make up a syllable; and the alternation
of syllables and relatively quiet pauses forms a characteristic, through noisy,
waveform pattern. Species-specific song recognition depends on certain temporal
song parameters, such as the slope of pulse
onsets~(\bcite{helversen1993absolute}). The amplitude modulation of the song
already carries sufficient information to allow for successful
recognition~(\bcite{helversen1997recognition}). Since grasshoppers are
ectotherms, the temporal structure of their songs warps with temperature.
Strong dependence on acoustic signals for ranged communication\\
- Diverse species-specific sound repertoires and production mechanisms\\
- Different contexts/ranges: Stridulatory, mandibular, wings, walking sounds\\
- Mate attraction/evaluation, rival deterrence, loss-of-signal predator alarm\\
$\rightarrow$ Elaborate acoustic behaviors co-depend on reliable auditory perception
Songs = Amplitude-modulated (AM) broad-band acoustic signals\\
- Generated by stridulatory movement of hindlegs against forewings\\
- Shorter time scales: Characteristic temporal waveform pattern\\