Abstract
Loggerhead turtle Caretta caretta nesting in Italy had been reported to be limited to the Pelagian Islands and only sporadically elsewhere. As presence of loggerhead turtle nests had occasionally been reported (1988–1999) along about 200 km of the Ionian coast of Calabria, we carried out a project to assess the actual state of the nesting population between 2000 and 2004. We divided the coastline in two sectors (A: 52 km, and B: 146 km) that were monitored from mid-June to end of July for a total of n = 174 monitoring days and 1,813.6 km patrolled on foot with different intensities (extensive versus intensive). In sector B, through extensive monitoring we did not find any emergence tracks, but in sector A by intensive survey (2002–2004: one survey/3.64 days) we detected 3–8 nests/year. In total, 25 nests (both observed and reported), were recorded in our study area, and an assessment of a total of 15–16 nests/year was suggested. These figures, within the national scenario depicted from the review of known nesting events in the last 40 years (88 records concerning more than 143–144 nests), show that loggerhead turtle nesting has been underestimated in Italy, due to inadequate monitoring protocols, and that nesting is more frequent than expected (at least 30–40 nests/year). Conservation strategies in Italy should then focus not only on the reduction of mortality at sea, but also include large-scale actions to preserve scattered (but regular) nesting events.



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References
Agnesi V, Federico C (1995) Aspetti geografico-fisici e geologici di Pantelleria e delle isole Pelagie. In: Massa B (ed) Arthropoda di Lampedusa, Linosa e Pantelleria (Canale di Sicilia, Mar Mediterraneo). Il Naturalista Sicil 19(Suppl):1–22
Argano R, Baldari F (1983) Status of western Mediterranean sea turtles. Rapports et Procès verbaux des reunions de la Commission Internationale pour l’exploration Scientifique de la Mer Méditerranée 28:233–235
Argano R, Basso R, Cocco M, Gerosa G (1992) Nuovi dati sugli spostamenti di Tartaruga marina comune (Caretta caretta) in Mediterraneo. Boll Museo Istituto Biol Univ Genova 56–57:137–164
Argano R, Cocco M, Di Palma MG, Jacomini C, Zava B (1991) Dati preliminari sulla distribuzione stagionale di Caretta caretta (L., 1758) Chelonia, Reptilia, nei mari italiani. In: Fasola M (ed) Atti II seminario italiano censimenti faunistici dei vertebrati, Suppl. Ricerche Biologia dellaSelvaggina, vol XVI, pp 189–191
Balazs GH, Chaloupka M (2004) Thirty-year recovery trend in the once depleted Hawaiian green sea turtle stock. Biol Conserv 117:491–498
Balletto E, D’Andrea A, Giacoma C, Piovano S, Zannetti A (eds) (2001a) Promoting cooperation of life-nature beneficiaries and other projects for the protection of sea turtle. Proceedings of the international workshop, Rome, 23rd October 2001, CTS-Prov. Reg. Agrigento, EDI.TUR S.r.l., Rome
Balletto E, Barone B, Cecconello M, D’Andrea A, Dell’Anna L, Di Marco S, Dominici A, Giacoma C, Mari F, Maglietta F, Nannarelli S, Nicolini G, Piovano S, Pozzi L, Solinas M, Zannetti A (2001b) Azioni urgenti di conservazione di Caretta caretta nelle Isole Pelagie. Pianura 13:223–226
Basso R (1992) Osservazioni e ricerche sulle tartarughe marine presenti nei mari italiani. Del Grifo, Lecce
Basso R (1996) Primi documentati casi di schiusa sul litorale del Mare Adriatico di Tartaruga comune (Caretta caretta) con l’ausilio di unità cinofile. In: Atti Convegno Fauna degli Iblei, Ente Fauna Siciliana, Noto, 13–14 maggio 1995, pp 153–157
Billes A (2000) News from the Protomac front, Congo. Kudu Lett 3:12
Bombace M, De Domenico R, Lo Valvo F, Nicolini G (2001) Interventi finalizzati alla salvaguardia del sito di ovideposizione della tartaruga marina Caretta caretta L. a Lampedusa. In: Casamento G (ed) Le riserve naturali siciliane gestite da Legambiente: un contributo alla conoscenza e alla tutela. Il Naturalista Sicil 25(Suppl):111–119
Bowen BW, Avise JC, Richardson JI, Meylan AB, Margaritoulis D, Hopkins-Murphy SR (1993) Population structure of loggerhead turtles (Caretta caretta) in the northwestern Atlantic ocean and Mediterranean Sea. Conserv Biol 7:834–844
Broderick AC, Glen F, Godley BJ, Hays GC (2002) Estimating the number of green and loggerhead turtles nesting annually in the Mediterranean. Oryx 36:227–236
Bruno S (1970) Anfibi e rettili di Sicilia (Studi sulla fauna erpetologica italiana XI). In: Atti Accademia Gioenia di Scienze Naturali in Catania, vol II, pp 185–326
Bruno S (1986) Tartarughe e Sauri d’Italia. Giunti Martello, Firenze
Cambié G (2003) Habitat naturali della costa occidentale sarda come siti potenziali di nidificazione e/o aree di alimentazione e di dispersione di Caretta caretta: aspetti geomorfologici ed ecologici. MSc thesis, Dipartimento di Scienze Ambientali, Università Ca’ Foscari, Venezia
Canbolat AF (2004) A review of sea turtle nesting activity along the Mediterranean coast of Turkey. Biol Conserv 116:81
Carr T, Carr N (1991) Surveys of the sea turtles of Angola. Biol Conserv 58:19–29
Carreras C, Cardona L, Aguilar A (2004) Incidental catch of the loggerhead turtle Caretta caretta off the Balearic Islands (western Mediterranean). Biol Conserv 117:321
Casale P, Laurent L, De Metrio G (2004) Incidental capture of marine turtles by the Italian trawl fishery in the north Adriatic Sea. Biol Conserv 119:287–295
Castelli N (1996) Una tartaruga marina ha nidificato su una delle nostre spiagge. Panda WWF, Suppl Not Reg 10:1–3
Centro Studi Cetacei (2002) Tartarughe marine recuperate lungo le coste italiane. V. Rendiconto 2002 (Reptilia). Atti Società Italiana di Scienze Naturali di Milano, vol 145, pp 393–424
Clarke M, Campbell AC, Hameid WS, Ghoneim S (2000) Preliminary report on the status of marine turtle nesting populations on the Mediterranean coast of Egypt. Biol Conserv 94:363–371
Cocco M, Argano R, Basso R (1988) Loggerhead (Caretta caretta) in Italian waters (Reptilia, Chelonidae). Rapports et Procès verbaux des reunions de la Commission Internationale pour l’exploration Scientifique de la Mer Méditerranée 31:287
Crouse DT (1984) Loggerhead sea turtle nesting in North Carolina: applications of an aerial survey. Biol Conserv 29:143–155
D’Alessandro L, Davoli L, Lupia Palmieri E, Amore C, Randazzo G (1993) Atlante delle Spiagge Italiane. Progetto Nazionale Dinamica e caratteri geoambientali degli spazi costieri. M.U.R.S.T-C.N.R, Selca, Firenze
Deflorio M, Aprea A, Corriero A, Santamaria N, De Metrio G (2005) Incidental captures of sea turtles by swordfish and albacore longlines in the Ionian sea. Fish Sci 71:1010–1018
Delaguerre M, Cesarini C (2004) Confirmed nesting of the Loggerhead turtle in Corsica. Mar Turtle Newsl 104:12
Di Palma MG (1978) Notizie sulle Tartarughe marine in Sicilia (Reptilia, Testudines). Il Naturalista Sicil 2:1–6
Di Palma MG, Lo Valvo F, Zava B (1989) Indagini sulla ovodeposizione di Caretta caretta in Sicilia (Reptilia, Chelonia). Il Naturalista Sicil 13:53–59
Dominici A, Forni L, Nannarelli S, D’Andrea A (2000) Nidificazione di Caretta caretta a Linosa (Isole Pelagie), 1994–1999. In: Proceedings of the first Italian meeting on the sea turtle biology and conservation, Policoro (MT), 19–20 Ottobre 2000, p 6 (book of abstracts)
Epperly SP, Braun J, Chester AJ (1995) Aerial surveys for sea turtles in North Carolina inshore waters. Fish Bull 93:254–261
Erk’akan F (1993) Nesting biology of loggerhead turtles Caretta caretta L. on Dalyan beach, Mugla-Turkey. Biol Conserv 66:1–4
Fozzi A, Pisu D, Schenk H (2002) Status di conservazione dei vertebrati di Piscinas-Monte Arcuentu (Sardegna sud-occidentale) e proposte gestionali. In: Schenk H, Ulzega A (eds) Monitoraggio scientifico nell’area del progetto LIFE Natura. Dune di Piscinas - Monte Arcuentu, Sardegna, pp 41–55
Freggi D (1997) Tartarughe marine a Lampedusa: osservazioni sulle stagioni riproduttive 1994–1996. Fauna del Mediterraneo: immagini e note di ecologia marina. Quad Livorno 3:12–48
Garmestani AS, Percival HF, Portier KM (2001) Preliminary evaluation of helicopter survey as a method of assessing sea turtle nesting distribution in ten thousand islands of Florida. Mar Turtle Newsl 93:1–5
Gerosa G, Casale P (1999) Interaction of marine turtles with fisheries in the Mediterranean. Mediterranean Action Plan UNEP (RAC/SPA), Tunis Cedex
Gerosa G, Aureggi M, Montanaro G, Cotroneo V (1999) Identificazione di tre nidi di Caretta caretta (Linnaeus, 1758) in litorali antropizzati della Calabria ionica. In: Proceeding of the IV Convegno Nazionale sui Cetacei e Tartarughe marine. Museo Civico di Storia Naturale, Milano, 11–12 Novembre 1999, p 5 (book of abstracts)
Gerosa G, Aureggi M, Montanaro G, Mangialardi S, Cotroneo V (2000) Effetti della luce artificiale su neonati di tartaruga caretta (Caretta caretta). In: Proceeding of the first Italian meeting on the sea turtle biology and conservation, Policoro (MT), 19–20 Ottobre 2000, p 4 (book of abstracts)
Giacoma C, Solinas M (2001) Urgent measures for the conservation of Caretta caretta in the Pelagie Islands. In: Balletto E et al (eds) Promoting cooperation of life-nature beneficiaries and other projects for the protection of sea turtle. Proceedings international workshop, Rome 23rd October 2001, CTS-Prov. Reg. Agrigento, EDI.TUR S.r.l., Rome, pp 22–28
Good P (2000) Permutation tests: a practical guide to resampling methods for testing hypotheses. Springer Verlag, New York
Gramentz D (1986) Loggerhead turtles at Lampedusa, Italy. Mar Turtle Newsl 36:3
Groombridge B (1994) Marine turtles in the Mediterranean: distribution, population status, conservation. Council of Europe Press, Nature and environment, No. 48, Strasbourg
Insacco G, Della Mea A, Barbieri I, Zava B (2000) Note su una nidificazione diurna di Caretta caretta (Linnaeus, 1758) nei pressi di Realmonte (Agrigento). In: Proceedings of the first Italian meeting on the sea turtle biology and conservation, Policoro (MT), 19–20 Ottobre 2000, p 7 (book of abstracts)
Jesu R (1995) La nidificazione delle tartarughe marine sulle coste italiane. In: Ballasina D (eds) Red data Book on Mediterranean chelonians. Edagricole–Edizioni Agricole, Bologna, pp 169–181
Kasparek M (1991) Marine turtles in Greece. Results of a survey of potential nesting beaches in the Northern Aegean Sea. MEDASSET, Athens
Kuller Z (1999) Current status and conservation of marine turtles on the Mediterranean coast of Israel. Mar Turtle Newsl 86:3–5
Laurent L, Bradai MN, Hadoud DA, El Gomati HM (1995) Marine turtle nesting activity assessment on Libyan coasts. Phase 1: survey of the coast between the Egyptian border and Sirte. Joint project of: Marine Biology Research Centre (Tajura, Lybia), MEDASSET, RAC/SPA (MAP-UNEP), Technical Centre for Environment Protection (TCEP, Tripoli), WWF International Mediterranean Programme
Laurent L, Bradai MN, Hadoud DA, El Gomati HM (1997) Assessment of sea turtle nesting activity in Lybia. Mar Turtle Newsl 76:2–6
Laurent L, Casale P, Bradai MN, Godley BJ, Gerosa G, Broderick AC, Schroth W, Schierwater B, Levy AM, Freggi D, Abd El-Mawla EM, Hadoud DA, Gomati HE, Domingo M, Hadjichristophorou M, Kornaraky L, Demirayak F, Gautier CH (1998) Molecular resolution of marine turtle stock composition in fishery bycatch: a case study in the Mediterranean. Mol Ecol 7:1529–1542
Laurent L, Lescure J, Excoffier L, Bowen B, Domingo M, Hadjichristophorou M, Kornaraky L, Trabuchet G (1993) Genetic studies of relationships between Mediterranean and Atlantic populations of loggerhead turtles Caretta caretta with a mitochondrial marker. C R Acad Sci Paris 316:1233–1239
Lescure J (1997) Caretta caretta (Linnaeus, 1758). In: Gasc JP (ed) Atlas of amphibians and reptiles in Europe. Societas Europaea Herpetologica, Muséum National d’Histoire Naturelle, Paris, pp 162–163
Lewison RL, Freeman SA, Crowder LB (2004) Quantifying the effect of fisheries on threatened species: the impact of pelagic longlines on loggerhead and leatherback sea turtles. Ecol Lett 7:221–231
Lutcavage ME, Plotkin P, Witherington B, Lutz PL (1997) Human impacts on sea turtle survival. In: Lutz PL, Musick JA (eds) The biology of sea turtle. CRC Press, Boca Raton, pp 387–409
Margaritoulis D (1988) Nesting of the loggerhead sea turtle Caretta caretta on the shores of Kiparissia Bay, Greece, in 1987. Mésogée 48:59–65
Margaritoulis D, Argano R, Baran I, Bentivegna F, Bradai MN, Caminas JA, Casale P, De Metrio G, Demetropulos A, Gerosa G, Brendan JG, Haddoud DA, Houghton J, Laurent L, Lazar B (2003) Loggerhead turtles in the Mediterranean sea: present knowledge and conservation perspectives. In: Bolten AB, Witherington BE (eds) Loggerhead sea turtles. Smithsonian Books, Washington, DC, Chap. 11, pp 175–198
Margaritoulis D (2005) Nesting activity and reproductive output of Loggerhead sea turtles, Caretta caretta, over 19 seasons (1984–2002) at Laganas Bay, Greece: the largest rookery in the Mediterranean. Chelonian Conserv Biol 4:916–929
Marine Turtle Specialist Group (1996) Caretta caretta. In: IUCN 2004. 2004 IUCN red list of Threatened Species <www.redlist.org>. Downloaded on 09 June 2005
Mast R (1999) Guest editorial: the common sense conservation. Mar Turtle Newsl 83:3–7
Mehta CR, Patel NR (1996) SPSS exact tests 7.0 for Windows. SPSS Inc., Chicago, IL, USA
Mingozzi T, Masciari G, Massolo A, Pisani B, Russo M, Tripepi S (2004) Il Progetto Caretta Calabria: risultati dei primi cinque anni d’indagini (2000–2004). In: fifth Congr. Naz. Soc. Herpt. It., Calci (Pisa), 29 Settembre–3 Ottobre 2004, pp 68–69 (book of abstracts)
Mingozzi T, Russo M, Pisani P, Sperone E, Paolillo G, Tripepi S (2000) Nidificazioni di Caretta caretta lungo la Costa ionica calabrese: tentativo di censimento tramite ricognizione aerea. In: Proceedings of the first Italian meeting on the sea turtle biology and conservation, Policoro (MT), 19–20 Ottobre 2000, p 3 (book of abstracts)
Paolillo G, Pisani B, Russo M, Focarelli C, Tripepi S, Mingozzi T (2000) Spiaggiamenti e nidificazioni di Caretta caretta in Calabria: sintesi 1988–1999. In: Proceedings of the first Italian meeting on the sea turtle biology and conservation, Policoro (MT), 19–20 Ottobre 2000, p 7–8 (book of abstracts)
Paolillo P, Florio PL (2000) Discotheque lights threaten loggerhead hatchlings. Mar Turtle Newsl 87:23–25
Piovano P, Nicolini G, Nannarelli S, Dominici A, Lo Valvo M, Giacoma C Analisi delle deposizioni di Caretta caretta sui litorali italiani. In: Proceedings of the fifth congresso nazionale Societas Herpetologica Italica, Calci (Pisa), Centro Interdipartimentale Museo di Storia Naturale e del Territorio Università di Pisa, SHI, 29 Settembre–3 Ottobre 2004 (in press)
Pisani B (2002) Spiaggiamenti e catture di Cheloni marini (Testudines, Reptilia) lungo le coste calabresi: sintesi 1989–2001. MSc thesis, Dipartimento di Ecologia, Università della Calabria, Rende (CS)
Plotkin PT, Spotila JR (2002) Post-nesting migrations of loggerhead turtles Caretta caretta from Georgia, USA: conservation implications for a genetically distinct subpopulation. Oryx 36:396
PNUE-MAP (2000) Action plan for the conservation of mediterranean marine turtles. CAR/ASP, Tunis
Pozio E, Frisenda S (1977) Gli anfibi e i rettili della regione Puglia. In: Atti VII Simposio Nazionale sulla Conservazione della Natura, Cacucci Ed., Bari, pp 233–257
Ragonese S, Jereb P (1992) On a nesting of the loggerhead turtle (Caretta caretta L., 1758) along the southern coast of Sicily (Mediterranean Sea). Rapports et Procès verbaux des reunions de la Commission Internationale pour l’exploration Scientifique de la Mer Méditerranée 33:305
Rumbold DG, Davis PW, Perretta C (2001) Estimating the effect of beach nourishment on Caretta caretta (loggerhead sea turtle) nesting. Restor Ecol 9:304
Russo G, Di Bella C, Loria GR, Insacco G, Palazzo P, Violani C, Zava B (2003) Notes on the influence of human activities on sea chelonians in Sicilian waters. J Mt Ecol 7(Suppl):37–41
Russo M (2001) Ricerche sui siti riproduttivi di tartaruga marina Caretta caretta (L., 1758) in Calabria: tentativo di censimento lungo la costa ionica. MSc thesis, Dipartimento di Ecologia, Università della Calabria, Rende (CS)
Schroeder BA, Foley AM, Bagley DA (2003) Nesting patterns, reproductive migrations, and adult foraging areas of loggerhaed turtles. In: Bolten AB, Witherington BE (eds) Loggerhead Sea Turtles. Smithsonian Books, Washington DC, Chap. 7, pp 114–143
Schroth W, Streit B, Schierwater B (1996) Evolutionary handicap for turtles. Nature 384:521–522
Seminoff JA (2004) Seaturtles, red listing, and the need for regional assessment. Mar Turtle Newsl 106:4–6
Siegel S, Castellan NJJ (1988) Nonparametric statistics for the behavioral sciences. McGraw-Hill, New York, USA
Sokal RR, Rohlf FJ (1995) Biometry. The principles and practice of statistics in biological research. W.H. Freeman and Co., New York, USA
Tomas J, Guitart R, Mateo R, Raga JA (2002) Marine debris ingestion in loggerhead sea turtles, Caretta caretta from the Western Mediterranean. Mar Pollut Bull 44:211
Turrisi GF, Vaccaro A (1997) Contributo alla conoscenza degli Anfibi e dei Rettili di Sicilia. Boll Accad Gioenia Sci Nat Catania 30:5–88
Whitmore C, Jesu R, Reynolds P (1991) Sardinia. An assessment of beaches for loggerhead turtle nesting. MEDASSET, Athens
Acknowledgements
The authors are grateful to the students and other observers who participated to the fieldwork: Antonia Celani, Alessandra De Lucia, Elena Giardinazzo, Nunzia Micò, Manuela Policastrese, Salvatore Salice, Emilio Sperone, Patrizia Rima and Gianpalmo Venuto. A special thank is due to local people for their enthusiastic support, namely Filippo Benavoli (Brancaleone, Italy), Pasquale Polimeno (Palizzi, Italy), Sebastiano Stranges (Palizzi, Italy) and Giuseppe Tuscano (Bova, Italy). A special appreciation is given to Professor Sandro Tripepi (Università della Calabria, Rende, Italy) for his help at the starting of the project. We also are indebted to people who helped in data collection for the Italian nesting overview, including: Roberto Basso (Museo Civico di Storia Naturale del Delta del Po, Ostellato, Italy), Flegra Bentivegna (Acquario di Napoli, Italy), Giovanni Boano and Giovanni B. Del Mastro (Museo Civico di Storia Naturale, Carmagnola, Italy), Daniela Freggi (WWF, Lampedusa, Italy), Francesco Galia (Oasi WWF di Torre Salsa, Italy), Gianni Insacco (Centro Studi Cetacei SWF, Museo Civico di Storia Naturale, Comiso, Italy), Fabio Lo Valvo (Regione Siciliana, Palermo, Italy), Mario Lo Valvo (Università di Palermo, Italy), Davide Morelli (Arbus, Italy), Paola Nicolosi (Museo di Storia Naturale di Padova, Italy), Sergio Nissardi (Cagliari, Italy), Helmar Schenk (Cagliari, Italy) and Fabrizio Turrisi (Università di Catania, Italy). Finally, we are grateful to Giuliano Matessi, (Biological Institute, University of Copenhagen, DK) for revising the English, and to an anonymous referee for constructive comments.
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Mingozzi, T., Masciari, G., Paolillo, G. et al. Discovery of a regular nesting area of loggerhead turtle Caretta caretta in southern Italy: a new perspective for national conservation. Biodivers Conserv 16, 3519–3541 (2007). https://doi.org/10.1007/s10531-006-9098-6
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DOI: https://doi.org/10.1007/s10531-006-9098-6