| Monitoring hawksbill turtle nesting sites in some protected areas from the Persian Gulf |
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| 作者姓名： | Hesni Majid Askari Rezaie-Atagholipour Mohsen Zangiabadi Somaye Tollab Mohammad Amin Moazeni Mostaf Jafari Hosein Matin Mohammad Talebi Zafarani Ghasem Ghorbanzadeh Shojaei Maht Motlaghnejad Abbas |
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| 作者单位： | Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman 7656914111, Iran,Qeshm Environmental Conservation Institute (QECI), Qeshm Island 7951616137, Iran,Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman 7656914111, Iran,Marine Environment Branch, Bushehr Department of Environment, Bushehr 7515877473, Iran,Marine Environment Branch, Bushehr Department of Environment, Bushehr 7515877473, Iran,Marine Environment Branch, Bushehr Department of Environment, Bushehr 7515877473, Iran,Marine Environment Branch, Iranian Department of Environment, Tehran 14155-7383, Iran,Research Center for Environment and Sustainable Development (RCESD), Iranian Department of Environment, Tehran 141551156, Iran,Marine Environment Branch, Iranian Department of Environment, Tehran 14155-7383, Iran,Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman 7656914111, Iran |
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| 基金项目： | The Division of Marine Environment/Iranian Department of Environment (IDOE) under contract No. 93.823 in 2015. |
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| 摘 要： | Iranian nesting populations of the critically endangered hawksbill turtle(Eretmochelys imbricate) are some of the most important in the Indian Ocean. In this study, four of the most important hawksbill nesting grounds in the Persian Gulf, situated within three Iranian marine protected areas, were surveyed during nesting season,including Nakhiloo, Ommolgorm and Kharko Islands and the mainland beaches of the Naiband Marine-Coastal National Park(NMCNP). We present GIS maps of these key nesting grounds and describe sand texture of key nesting zones, along with conservation recommendations. About 9.2(28.3%) out of 32.5 km of all shores surveyed in this study were used by nesting hawksbill turtles follows: Nakhiloo: 1.4 km(52% of potential nesting area);Ommolgorm: 1.94 km(40%); Kharko: 3.4 km(28%), and NMCNP: 2.46 km(18.9%). The average nesting density was calculated as 131 nests/km at Nakhiloo, 76 nests/km at Ommolgorm, 7 nests/km at Kharko, and 15 nests per km at NMCNP. Highest nesting density was observed in Nakhiloo and Ommolgorm. It is thought that high hawksbill nesting density in these islands seems likely a result of limiting adequate nesting shores rather than the size of population, and also low density in Kharko and NMCNP more related to past and current pressures and low population density. With the exception of Ommolgorm Island, sands at the nesting grounds were well sorted.Grain size indicated that female hawksbill turtles in the Iranian Persian Gulf nest in sands that are generally mixed, with mean grain size ranging from coarse sands(0.4Φ;～0.5–1 mm) to fine sands(2Φ;～0.25 mm). We provide and discuss conservation recommendations and suggestions for future.
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| 关 键 词： | marine protected areas marine turtles nesting sand texture GIS maps |
| 收稿时间： | 2018/11/12 0:00:00 |
Monitoring hawksbill turtle nesting sites in some protected areas from the Persian Gulf |
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| Hesni Majid Askari,Rezaie-Atagholipour Mohsen,Zangiabadi Somaye,Tollab Mohammad Amin,Moazeni Mostaf,Jafari Hosein,Matin Mohammad Talebi,Zafarani Ghasem Ghorbanzadeh,Shojaei Maht,Motlaghnejad Abbas.Monitoring hawksbill turtle nesting sites in some protected areas from the Persian Gulf[J].Acta Oceanologica Sinica,2019,38(12):43-51. |
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| Authors: | Hesni Majid Askari Rezaie-Atagholipour Mohsen Zangiabadi Somaye Tollab Mohammad Amin Moazeni Mostaf Jafari Hosein Matin Mohammad Talebi Zafarani Ghasem Ghorbanzadeh Shojaei Mahtab and Motlaghnejad Abbas |
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| Institution: | Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman 7656914111, Iran;Qeshm Environmental Conservation Institute (QECI), Qeshm Island 7951616137, Iran;Marine Environment Branch, Bushehr Department of Environment, Bushehr 7515877473, Iran;Marine Environment Branch, Iranian Department of Environment, Tehran 14155-7383, Iran;Research Center for Environment and Sustainable Development (RCESD), Iranian Department of Environment, Tehran 141551156, Iran |
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| Abstract: | Iranian nesting populations of the critically endangered hawksbill turtle (Eretmochelys imbricate) are some of the most important in the Indian Ocean. In this study, four of the most important hawksbill nesting grounds in the Persian Gulf, situated within three Iranian marine protected areas, were surveyed during nesting season, including Nakhiloo, Ommolgorm and Kharko Islands and the mainland beaches of the Naiband Marine-Coastal National Park (NMCNP). We present GIS maps of these key nesting grounds and describe sand texture of key nesting zones, along with conservation recommendations. About 9.2 (28.3%) out of 32.5 km of all shores surveyed in this study were used by nesting hawksbill turtles follows: Nakhiloo: 1.4 km (52% of potential nesting area); Ommolgorm: 1.94 km (40%); Kharko: 3.4 km (28%), and NMCNP: 2.46 km (18.9%). The average nesting density was calculated as 131 nests/km at Nakhiloo, 76 nests/km at Ommolgorm, 7 nests/km at Kharko, and 15 nests per km at NMCNP. Highest nesting density was observed in Nakhiloo and Ommolgorm. It is thought that high hawksbill nesting density in these islands seems likely a result of limiting adequate nesting shores rather than the size of population, and also low density in Kharko and NMCNP more related to past and current pressures and low population density. With the exception of Ommolgorm Island, sands at the nesting grounds were well sorted. Grain size indicated that female hawksbill turtles in the Iranian Persian Gulf nest in sands that are generally mixed, with mean grain size ranging from coarse sands (0.4Φ; ~0.5-1 mm) to fine sands (2Φ; ~0.25 mm). We provide and discuss conservation recommendations and suggestions for future. |
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| Keywords: | marine protected areas marine turtles nesting sand texture GIS maps |
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