Browsing by Autor "Reginald B. Cocroft"

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Inexpensive Methods for Detecting and Reproducing Substrate-Borne Vibrations: Advantages and Limitations
(Springer Nature, 2022) Rachele Nieri; Sabrina Michael; Carlos F. Pinto; Omar N. Urquizo; Heidi M. Appel; Reginald B. Cocroft
Leaf vibrations produced by chewing provide a consistent acoustic target for plant recognition of herbivores
(Springer Science+Business Media, 2020) Alexis M. Kollasch; Abdul-Rahman Abdul-Kafi; Mélanie Body; Carlos F. Pinto; Heidi M. Appel; Reginald B. Cocroft
Mate searching in <i>Ennya maculicornis</i> (Membracidae: Polyglyptini) initiated by females: behavioural and acoustic descriptions
(Wiley, 2019) Romina Cossio‐Rodríguez; Reginald B. Cocroft; Hermann M. Niemeyer; Carlos F. Pinto
1. In treehoppers in which courtship has been studied, males initiate the search for females by periodically emitting a vibrational signal. The responses by the female are used by males as a beacon and give rise to a duet. 2. Courtship and mating of the treehopper Ennya maculicornis were characterised through the simultaneous recording of vibrational signals and the behaviour of males and females in an arena. 3. In E. maculicornis , female initiated mate searching. Females produced two types of signals during the this process: (i) a signal that preceded the approach by the male and (ii) a signal that preceded mating. Males emitted two signals associated with two stereotyped body movements: (i) a signal produced as a response to the first signal emitted by the female, involving a change in the male's locomotory mode and the approach to the female, and (ii) a signal produced after finding and holding on to the female, involving simultaneous abdomen raising and wing fluttering. These signals were repeated several times before the female emitted the second signal. The four signalling patterns were observed in all recordings in which mating was observed. When any of the signals was missing, mating did not occur. 4. Female‐biased sex ratios in E. maculicornis , along with iteroparity, are suggested to explain the initiation of mate searching behaviour by females. A comparison of data with that from other treehoppers indicates that vibrational signals and their associated behaviour are more diverse among treehoppers than has been appreciated previously.
SPECIES IDENTITY IN THE GENUS ADENOMERA (ANURA: LEPTODACTYLIDAE) IN SOUTHEASTERN PERU
(Herpetologists' League, 2003) Ariadne Angulo; Reginald B. Cocroft; Steffen Reichle
The genus Adenomera has been a difficult group for systematic studies because the species are similar and geographically variable. Two species have been reported from the Peruvian Amazon Basin: Adenomera andreae and Adenomera hylaedactyla. However, acoustic recordings from the Tambopata National Reserve in southeastern Peru reveal four sympatric advertisement call types that are distinctive in acoustic parameters and to the human ear. Some subtle morphological differences are also present. We conclude that there are at least four sympatric species at Tambopata and that Adenomera has a greater species diversity than currently acknowledged.