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1,065 results for “katydid”
FIGURE 4 in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
FIGURE 4. Comparison of A. rDNA, and B. mtDNA trees. Nodes with <85% posterior probability are collapsed. Species Groups are color coded.
FIGURE 3 in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
FIGURE 3. Bayesian consensus tree showing species Groups (color coded) and species hypotheses. Nodes with <85% posterior probability are collapsed.
FIGURE 2 in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
FIGURE 2. Neduba typical male calling song structure exemplified by N. convexa, recording JCR130808_01, 23.3oC (A-C), and song structure with multiple minor pulse trains exemplified by N. sierranus recording JCR120805_00, 21.7oC (D-E). A. 5 s oscillogram window showing 9 full wingstroke cycles (and a partial 10th major pulse train); B. 1.5 s oscillogram window showing individual pulses within major pulse trains; C. spectrogram of B with dashed line at limit of human hearing at 20 kHz; D. 5 s oscillogram window showing 6 full wingstroke cycles (and a partial series of minor pulse trains); E. 1.5 s oscillogram window of D showing individual pulses within major pulse trains; F. Male N. sierranus singing, Madera Co., CA. Note elevated pronotum exposing tegmina beneath; G. Phonotaxis in N. ambagiosa sp. n., Lake Co., CA.
FIGURE 1 in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
FIGURE 1. Color pattern variation in Neduba. Multiple color patterns are found within species (A and B), and color patterns may be shared among different species (C and D) and species Groups (E and F).
PLATE 1 in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
PLATE 1. Live habitus of Carinata Group. A. N. carinata male, B. N. ambagiosa paratypes in phonotaxis, C. N. ambagiosa male (photo credit Jim Hogue), D. N. radicata paratype male, E. N. steindachneri male, F. N. cascadia paratopotype male showing mottled color form, G. N. cascadia paratopotype male singing (note elevated pronotal shield to give tegmina room to move, and perhaps, also create a parabola effect), H. N. cascadia paratyopotype male showing striped color form.
FIGURE 14. N in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
FIGURE 14. N. longiplutea male and female habitus, calling song, male and female terminalia, karyotype.
FIGURE 17. N in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
FIGURE 17. N. cascadia male and female habitus, calling song, male and female terminalia, karyotype.
FIGURE 5 in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
FIGURE 5. rDNA Bayesian consensus tree. Nodes with <85% posterior probability are collapsed. Species Groups are color coded, and species hypotheses are indicated.
PLATE 8 in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
PLATE 8. Ventral sclerites: Sierranus and Sequoia Groups. A. N. sierranus, B. N. radocantans, C. N. arborea, D. N. inversa, E. N. prorocantans, F–H. N. sequoia.
PLATE 5 in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
PLATE 5. Male calling songs of the Castanea, Lucubrata, Sierranus, and Sequoia Groups. A. N. castanea, B. N. macneilli, C. N. lucubrata, D. N. sierranus, E. N. radocantans, F. N. arborea, G. N. inversa, H. N. prorocantans, I. N. sequoia, J. N. duplocantans. Left column shows 4 s oscillogram windows, right column are 1 s windows.
FIGURE 24. N in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
FIGURE 24. N. sierranus male and female habitus, calling song, male and female terminalia, karyotype.
PLATE 4 in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
PLATE 4. Male calling songs of the Carinata and Propsti Groups.. A. N. carinata, B. N. oblongata, C. N. ambagiosa, D. N. diabolica, E. N. longiplutea, F. N. radicata, G. N. convexa, H. N. cascadia, I. N. steindachneri, J. N. propsti. Left column shows 4 s oscillogram windows, right column are 1 s windows.
FIGURE 23. N in A revision of the shield-back katydid genus Neduba (Orthoptera: Tettigoniidae: Tettigoniinae: Nedubini)
FIGURE 23. N. lucubrata male and female habitus, calling song, male and female terminalia, karyotype.
Data from: Silent katydid females are at higher risk of bat predation than acoustically signalling katydid males
Males that produce conspicuous mate attraction signals are often at high risk of predation from eavesdropping predators. Females of such species typically search for signalling males and their higher motility may also place them at risk. The relative predation risk faced by males and females in the context of mate-finding using long-distance signals has rarely been investigated. In this study, we show, using a combination of diet analysis and behavioural experiments, that katydid females, who do not produce acoustic signals, are at higher risk of predation from a major bat predator, Megaderma spasma, than calling males. Female katydids were represented in much higher numbers than males in the culled remains beneath roosts of M. spasma. Playback experiments using katydid calls revealed that male calls were approached in only about one-third of the trials overall, whereas tethered, flying katydids were always approached and attacked. Our results question the idea that necessary costs of mate-finding, including risk of predation, are higher in signalling males than in searching females.
Data from: The metabolic costs of sexual signalling in the chirping katydid Plangia graminea (Serville) (Orthoptera: Tettigoniidae) are context dependent: cumulative costs add up fast
Katydids produce acoustic signals via stridulation which they use to attract conspecific females for mating. However, direct estimates of the metabolic costs of calling to date have produced diverse cost estimates and are limited to only a handful of insect species. In this study, we therefore investigated the metabolic cost of calling in a unstudied sub-Saharan katydid, Plangia graminea. Using wild-caught animals, we measured katydid metabolic rate using standard flow-through respirometry while simultaneously recording the number of calls produced. Overall, the metabolic rate during calling in P. graminea males was 59% higher than the resting metabolic rate (0.443±0.056 vs. 0.279±0.028 CO2 ml g−1 h−1) although highly variable among individuals. While individual call costs were relatively inexpensive (ranging from 0.02–5.4% increase in metabolic rate per call) the individuals with cheaper calls called more often and for longer than those with expensive calls resulting in the former group having significantly greater cumulative costs over a standard amount of time (9.5 h). The metabolic costs of calling are however context dependent since the amount of time spent calling greatly influenced these costs in our trials. A power law function described this relationship between cumulative cost and percentage increase per call (y=130.21x−1.068, R2=0.858); where y=cumulative cost, and x=percentage increase per call. The choice of metric employed for estimating energy costs (i.e. how costs are expressed) also affects the outcome and any interpretation of costs of sexual signalling. For example, the absolute, relative and cumulative metabolic costs of calling yield strongly divergent estimates and any fitness implications depend on the organism's energy budget and the potential trade-offs in allocation of resources that are made as a direct consequence of increased calling effort.
Data from: Leader preference in Neoconocephalus ensiger katydids: a female preference for a non-heritable male trait
Leader preferences, which result in greater mating success of males that produce their signals just ahead of those of their neighbors, are common in acoustically communicating insects and anurans (e.g. Whitney and Krebs 1975, Greenfield and Roizen 1993, Grafe 1996, Römer et al. 1997, Greenfield et al. 2004). These preferences are unusual in that they do not act on a property of the male signal itself but rather on its timing relative to that of other males (Snedden and Greenfield 1998), making the relationship between female preferences and male signal traits particularly complex. Leader preferences have been studied from several perspectives: their strength, their effect on male interactions, and their evolutionary origins (e.g. Greenfield and Roizen 1993, Grafe 1999, Römer et al. 2002, Hartbauer et al. 2006, Richardson et al. 2008, Hartbauer 2014, Party et al. 2014, Party et al. 2015).
FIGURE 2. Spinapecta alieniphaga gen. n in A new genus and species of katydids of the tribe Polyancistrini (Orthoptera: Tettigoniidae: Pseudophyllinae) from Brazil, an apparent pest of Eucalyptus plantations
FIGURE 2. Spinapecta alieniphaga gen. n. et sp. n.: (A) female tegmina; (B) male tegmina; (C) female subgenital plate; (D) female meso and metasternum; (E) Polyancistrus abbotti Rehn, male, lateral view.
FIGURE 1. Spinapecta alieniphaga gen. n in A new genus and species of katydids of the tribe Polyancistrini (Orthoptera: Tettigoniidae: Pseudophyllinae) from Brazil, an apparent pest of Eucalyptus plantations
FIGURE 1. Spinapecta alieniphaga gen. n. et sp. n.: (A) male, lateral view; (B) male pronotum, dorsal; (C) ovipositor; (D) male cerci and tenth tergite, dorsal; (E) male subgenital plate and tenth tergite.
FIGURE 5. A–C in New species of arboreal predatory katydids from West Africa (Orthoptera: Tettigoniidae: Meconematinae)
FIGURE 5. A–C. Epiphallus: A. Anepitacta wrightae; B. Amyttopsis palmulicerca; C. A. bakowskii; D–G. Eggs: D & E. Amyttosa insectivora; F. Gonamytta occidentalis; G. Brachyamytta maculipes; H–I. Male pronota: H. G. occidentalis; I. Anepitacta guentheri.
FIGURE 4. A–J in New species of arboreal predatory katydids from West Africa (Orthoptera: Tettigoniidae: Meconematinae)
FIGURE 4. A–J. Stridulatory files: A. Proamytta spinifera; B. Amyttopsis palmulicerca; C. X. bakowskii; D. Anepitacta wrightae; E. Brachyamytta rapidoaestima; F. B. mcculloughae; G. B. maculipes; H. Amyttosa insectivora; I. Xiphidiolahokei; J. X. lobaticerca; K–T. Left tegmina of males: K. Proamytta spinifera; L. Amyttopsis palmulicerca; M. X. bakowskii; N. Anepitacta wrightae; O. Brachyamytta rapidoaestima; P. B. mcculloughae; Q. B. maculipes; R. Amyttosa insectivora; S. Xiphidiola hokei; T. X. lobaticerca.
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Allen Brain Atlas
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