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Issue: Vol. 5311 No. 1: 28 Jun. 2023
Type: Article
Published: 2023-06-28
DOI: 10.11646/zootaxa.5311.1.7
Page range: 135-147
Abstract views: 206
PDF downloaded: 119

An investigation of patch occupancy and dispersal by third to final instar nymphs of Brachytrupes megacephalus Lefèbvre, 1827 (Orthoptera: Gryllidae: Gryllinae) across the sand dune biotope at the Għadira Nature Reserve, Malta

Institute of Earth Systems; Chemistry & Pharmacology Building; University of Malta; Msida; MSD 2080; Malta
Department of Geosciences; Faculty of Science; University of Malta; Msida; MSD 2080; Malta
Birdlife Malta; 57/28; Abate Rigord Street; Ta’ Xbiex; XBX 1120; Malta
Birdlife Malta; 57/28; Abate Rigord Street; Ta’ Xbiex; XBX 1120; Malta
Birdlife Malta; 57/28; Abate Rigord Street; Ta’ Xbiex; XBX 1120; Malta
Orthoptera Central Mediterranean climatic variables stenotopic connectivity conservation

Abstract

Dispersal patterns of third, fourth and fifth instar nymphs of the stenoecious gryllid, Brachytrupes megacephalus (Lefèbvre, 1827), are investigated on the sand dune within the Għadira Nature Reserve, a remnant habitat patch forming part of the core area that supports the largest population of the species in Malta. Field investigations were carried out over a period of 11 weeks during a specific 75 minute time window, when nymphs are known to engage in subaerial activity at the mouth of their respective burrow. Climatic variables are examined in relation to abundance, while dispersal patterns are presented. The study shows that the predominant movement of nymphs across the terrain is northward, mainly to the northwest and the north-northeast. The present contribution also provides a summary of recommendations for conservation of the species, including an interdisciplinary approach to habitat management at multiple spatial scales.

 

References

  1. Cassar, L.F. (2019) Of naturalists and crickets: How an off-chance discovery led to a lifelong journey of scientific inquiry. In: Falzon, M.-A. (Ed.), The Examined Life: Writings in of honour of Guido Lanfranco. Midsea Books Limited, Valletta, pp. 97–111 + 274–275, 6 figs.
  2. Cassar, L.F. & Conrad, E. (2008) New populations of Brachytrupes megacephalus (Lefevre, 1827) on mainland Malta and some notes on its adaptive capacity (Orthoptera: Gryllidae). Bulletin of the Entomological Society of Malta, 1, 59–62.
  3. Cassar, L.F., Conrad, E. & Galdies, C. (2018) report on the conservation status of Brachytrupes megacephalus (Lefèbvre, 1827) (Gryllidae—Orthoptera) in the Maltese Islands. unpublished report commissioned by the Environment & resources authority, Malta, v + 33 pp.
  4. Cassar, L.F., Galdies, C. & Xuereb, N. (2019) An evaluation of risk from sea level rise and storm surge on subpopulations of Brachytrupes megacephalus (Lefèbvre, 1827) on the island of Malta. Bulletin of the Entomological Society of Malta, 10, 21–28. https://doi.org/10.17387/BULLENTSOCMALTA.2019.03
  5. Cassar, L.F., Conrad, E. & Galdies, C. (2021) Brachytrupes megacephalus Lefèbvre, 1827 (Orthoptera, Gryllidae) in the Maltese Islands: notes on biogeography, behaviour, and habitat of populations in the central Mediterranean area and the Maghreb. Zootaxa, 4975 (3), 544–560. https://doi.org/10.11646/zootaxa.4975.3.5 DOI: https://doi.org/10.11646/zootaxa.4975.3.5
  6. Chopard, L. (1943) Orthopteroides de L’Afrique du Nord. Larose, Paris, 450 pp.
  7. Conti, E., Costa, G., Petralia, A. & Petralia, E. (2014) Eco-ethology of Brachytrupes megacephalus (Orthoptera, Gryllidae), protected species in UE. In: Petralia, A. & Bianca, C. (Eds.), 2nd Djerba International Mediterranean Environment Sustainability Conference. Atti e Memorie dell’Ente Fauna Siciliana, 11, 51–56.
  8. Lakhdari, W., Doumandji-Mitiche, B., Dehliz, A., Acheuk, F., Hammi, H., M’lik R. & Soud, A. (2015) Some elements of the bio-ecology of Brachytrupes megacephalus Lefebvre, 1827 (Orthoptera, Gryllidae) in the Region of Oued Righ (Algerian Sahara). American-Eurasian Journal of Agricultural & Environmental Sciences, 15 (6), 1082–1089. https://doi.org/10.5829/idosi.aejaes.2015.15.6.12672
  9. Lefèbvre, A. (1827) Description de divers insectes (Orthoptera, Gryllinae) inédit recueillis en Sicile. Annales de la Société linnéenne de paris, VI, 10.
  10. Massa, B., Fontana, P., Buzzetti, F.M., Kleukers, R. & Odé, B. (2012) Fauna d’Italia—Orthoptera. Vol. XLVIII. Calderini Ed., Milano, ccxiv + 563 pp., DVD.
  11. Petralia, A., Petralia, E., Sabella, G., Brogna, F. & Bianca, C. (2015) Presence’s mapping of Brachytrupes megacephalus (Lefebrve, 1827) (Orthoptera, Gryllidae) within the Natural Reserve of Vendicari. Biodiversity Journal, 6, 323–326.
  12. Blaeu, J. (1664–1665) MELITE INSVLA. Blaeu atlases, Amsterdam. Old maps online, Identifier: 1874-406762-025. Available from: https://uu.oldmapsonline.org/maps/4af91116-57a9-4b71-9fc7-a768acf4fae7/ (accessed 26 March 2023)
  13. Taniguchi, N. & Tomioka, K. (2003) Duration of development and number of nymphal instars are differentially regulated by photoperiod in the cricket Modicogryllus siamensis (Orthoptera: Gryllidae). European Journal of Entomology, 100, 275–281.
  14. https://doi.org/10.14411/eje.2003.043 DOI: https://doi.org/10.14411/eje.2003.043
  15. Truman, J.W. (2019) The Evolution of Insect Metamorphosis. Current Biology, 29 (23), 1252–1268. https://doi.org/10.1016/j.cub.2019.10.009 DOI: https://doi.org/10.1016/j.cub.2019.10.009
  16. Zhemchuzhnikov, M.K. & Knyazev, A.N. (2012) "Ontogenesis of the Cricket Gryllus argentinus Sauss. (Orthoptera, Gryllidae)." Entomological Review, 92 (2), 146–153. https://doi.org/10.1134/S0013873812020030 DOI: https://doi.org/10.1134/S0013873812020030