{"id":{"repo_id":"london-metro","oai_identifier":"oai:repository.londonmet.ac.uk:3113"},"canonical_url":"https://search.dev.ndltd.org/etd/london-metro/oai:repository.londonmet.ac.uk:3113","repository":{"repo_id":"london-metro","name":"London Metropolitan University","base_url":"https://repository.londonmet.ac.uk/cgi/oai2"},"display":{"title":"Aspects of acoustic interaction in the bushcricket genus Metrioptera (Orth., tettigonioidea)","abstract":"This study Is an investigation into the behaviour of male bushcrickets of the genus Metrioptera. The situation investigated was that arising when the males of different species are placed in the same enclosure. A large number of such experiments was made and in each case observations were made on the movements of the insects, particularly with respect to one another. Their stridulations were recorded and subsequently analyzed with a view to detecting influences by the song of one insect upon song production by the other. Attempts were made to relate the behaviour to that observed in similar circumstances when the two males belonged to the same species. In the latter cases, clearly recognisable aggression and homosexual courtship were much commoner, and there was a much stronger tendency for the defeated insect to return to the victor in one species, influence of pre-conflict caging conditions was studied. Four species of Metrioptera were utilised: M. roeselii (HAGENBACH), M. brachyptera (L.), M. bicolor (PHILIPPI), and M. sepium (YERSIN). Nearly all of the experiments were confined to the first three species. It was found that the stridulations of roeselii and bicolor tended to inhibit song output in brachyptera. In interactions between roeselii and bicolor, either insect could be inhibited, but it was more often bicolor. A visit was made to a German locality where roeselii and bicolor occurred naturally in the same place, and inhibition effects were observed to take place between them in the field. One brachyptera out of thirteen tested produced chirps with more syllables than usual, when exposed to roeselii song. It did not modify its chirps in response to bicolor song, perhaps because of the more discrete nature of the latter. The phenomenon is discussed in relation to Broughton'S (I965) discovery of song modification in Platycleis denticulata (PANZER).","abstract_html":"This study Is an investigation into the behaviour of male bushcrickets of the genus Metrioptera. The situation investigated was that arising when the males of different species are placed in the same enclosure. A large number of such experiments was made and in each case observations were made on the movements of the insects, particularly with respect to one another. Their stridulations were recorded and subsequently analyzed with a view to detecting influences by the song of one insect upon song production by the other. Attempts were made to relate the behaviour to that observed in similar circumstances when the two males belonged to the same species. In the latter cases, clearly recognisable aggression and homosexual courtship were much commoner, and there was a much stronger tendency for the defeated insect to return to the victor in one species, influence of pre-conflict caging conditions was studied. Four species of Metrioptera were utilised: M. roeselii (HAGENBACH), M. brachyptera (L.), M. bicolor (PHILIPPI), and M. sepium (YERSIN). Nearly all of the experiments were confined to the first three species. It was found that the stridulations of roeselii and bicolor tended to inhibit song output in brachyptera. In interactions between roeselii and bicolor, either insect could be inhibited, but it was more often bicolor. A visit was made to a German locality where roeselii and bicolor occurred naturally in the same place, and inhibition effects were observed to take place between them in the field. One brachyptera out of thirteen tested produced chirps with more syllables than usual, when exposed to roeselii song. It did not modify its chirps in response to bicolor song, perhaps because of the more discrete nature of the latter. The phenomenon is discussed in relation to Broughton'S (I965) discovery of song modification in Platycleis denticulata (PANZER).","abstract_has_math":false,"creators":["McHugh, Roland"],"institution":"City of London Polytechnic","degree_name":"phd","degree_level":"doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1971,"date_issued":"1971","date_published":"1971","updated_at":"2026-07-24T02:54:27Z","subjects":["590 Animals (Zoology)"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier.grantnumber","label":"Dc Identifier Grantnumber","values":["N/A"],"render_values":[{"text":"N/A","href":null,"code":true}]}]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.sponsor","label":"Sponsor","values":["London Metropolitan University"]},{"key":"dc:creator","label":"Author","values":["McHugh, Roland"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1971"]},{"key":"dc:date.issued","label":"Date","values":["1971"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["School of Human Sciences (SHSC)","Department of Biological Sciences, Sir John Cass School of Science and Technology"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["City of London Polytechnic"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://repository.londonmet.ac.uk/3113/"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["doctoral"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["phd"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["590 Animals (Zoology)"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.grantnumber","label":"Dc Identifier Grantnumber","values":["N/A"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://repository.londonmet.ac.uk/3113/1/285241.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This study Is an investigation into the behaviour of male bushcrickets of the genus Metrioptera. The situation investigated was that arising when the males of different species are placed in the same enclosure. A large number of such experiments was made and in each case observations were made on the movements of the insects, particularly with respect to one another. Their stridulations were recorded and subsequently analyzed with a view to detecting influences by the song of one insect upon song production by the other. Attempts were made to relate the behaviour to that observed in similar circumstances when the two males belonged to the same species. In the latter cases, clearly recognisable aggression and homosexual courtship were much commoner, and there was a much stronger tendency for the defeated insect to return to the victor in one species, influence of pre-conflict caging conditions was studied. Four species of Metrioptera were utilised: M. roeselii (HAGENBACH), M. brachyptera (L.), M. bicolor (PHILIPPI), and M. sepium (YERSIN). Nearly all of the experiments were confined to the first three species. It was found that the stridulations of roeselii and bicolor tended to inhibit song output in brachyptera. In interactions between roeselii and bicolor, either insect could be inhibited, but it was more often bicolor. A visit was made to a German locality where roeselii and bicolor occurred naturally in the same place, and inhibition effects were observed to take place between them in the field. One brachyptera out of thirteen tested produced chirps with more syllables than usual, when exposed to roeselii song. It did not modify its chirps in response to bicolor song, perhaps because of the more discrete nature of the latter. The phenomenon is discussed in relation to Broughton'S (I965) discovery of song modification in Platycleis denticulata (PANZER)."]},{"key":"dc:format","label":"Dc Format","values":["text"]},{"key":"dc:title","label":"Title","values":["Aspects of acoustic interaction in the bushcricket genus Metrioptera (Orth., tettigonioidea)"]}]}],"canonical_facts":{"dc:contributor.sponsor":["London Metropolitan University"],"dc:creator":["McHugh, Roland"],"dc:date":["1971"],"dc:date.issued":["1971"],"dc:description.abstract":["This study Is an investigation into the behaviour of male bushcrickets of the genus Metrioptera. The situation investigated was that arising when the males of different species are placed in the same enclosure. A large number of such experiments was made and in each case observations were made on the movements of the insects, particularly with respect to one another. Their stridulations were recorded and subsequently analyzed with a view to detecting influences by the song of one insect upon song production by the other. Attempts were made to relate the behaviour to that observed in similar circumstances when the two males belonged to the same species. In the latter cases, clearly recognisable aggression and homosexual courtship were much commoner, and there was a much stronger tendency for the defeated insect to return to the victor in one species, influence of pre-conflict caging conditions was studied. Four species of Metrioptera were utilised: M. roeselii (HAGENBACH), M. brachyptera (L.), M. bicolor (PHILIPPI), and M. sepium (YERSIN). Nearly all of the experiments were confined to the first three species. It was found that the stridulations of roeselii and bicolor tended to inhibit song output in brachyptera. In interactions between roeselii and bicolor, either insect could be inhibited, but it was more often bicolor. A visit was made to a German locality where roeselii and bicolor occurred naturally in the same place, and inhibition effects were observed to take place between them in the field. One brachyptera out of thirteen tested produced chirps with more syllables than usual, when exposed to roeselii song. It did not modify its chirps in response to bicolor song, perhaps because of the more discrete nature of the latter. The phenomenon is discussed in relation to Broughton'S (I965) discovery of song modification in Platycleis denticulata (PANZER)."],"dc:format":["text"],"dc:identifier.grantnumber":["N/A"],"dc:identifier.uri":["https://repository.londonmet.ac.uk/3113/1/285241.pdf"],"dc:publisher.department":["School of Human Sciences (SHSC)","Department of Biological Sciences, Sir John Cass School of Science and Technology"],"dc:publisher.institution":["City of London Polytechnic"],"dc:relation.isreferencedby":["https://repository.londonmet.ac.uk/3113/"],"dc:subject":["590 Animals (Zoology)"],"dc:title":["Aspects of acoustic interaction in the bushcricket genus Metrioptera (Orth., tettigonioidea)"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["doctoral"],"dc:type.qualificationname":["phd"]},"updated_at":"2026-07-24T02:54:27Z"}