Nel Paleartico occidentale la specie è distribuita in modo frammentario nellepatti centromeridionali.Per l’Italia settentrionale (Padania) è abbondante come esti-vante e nidificante e scarsamente localizzat...Nel Paleartico occidentale la specie è distribuita in modo frammentario nellepatti centromeridionali.Per l’Italia settentrionale (Padania) è abbondante come esti-vante e nidificante e scarsamente localizzata come svernante,mentre per il restodel territorio nazionale è più scarsa e localizzata.Nel censimento del 1981 venivanostimate 17500 coppie nidificanti in Italia (FASOLA e ALIERI,1992),pari al 41% dellapopolazione europea.La Lombardia nel 1981 ha ospitato il 56% della popolazioneitaliana e nel 1983-87 sono state occupate 24 garzaie (BRICHETTI e FASOLA,1990).展开更多
In this study,live fledglings of Nycticorax nycticorax and Ardeola bacchus at the Huangpu District of Guangzhou City were collected,and their primary feather,breast feather,tail feather,liver,chest muscle and egg shel...In this study,live fledglings of Nycticorax nycticorax and Ardeola bacchus at the Huangpu District of Guangzhou City were collected,and their primary feather,breast feather,tail feather,liver,chest muscle and egg shell were sampled for mercury determination.The results showed that these two heron species had a very similar distribution pattern of mercury concentration in their tissues and organs,i.e.,tail feather > breast and primary feather > liver > chest muscle > egg shell.Ardeola bacchus had higher levels of mercury in all its tissues than Nycticorax nycticorax.There were significant interspecific differences in mercury level for breast feather and primary feather.Because the collection of breast feather is easier and not harmful to birds,it is better to use it rather than primary or tail feather to monitor environmental pollution.The mercury level in breast feather was ten times higher than that in liver,lower than that in tail feather,but not significantly different to that in primary feather.The mercury concentrations in the tissues of Nycticorax nycticorax and Ardeola bacchus from Huangpu District of Guangzhou were similar to those from the suburbs of Chengdu,Sichuan Province,but lower than those from Taihu Lake,Jiangsu Province and higher than those from Hong Kong.展开更多
文摘Nel Paleartico occidentale la specie è distribuita in modo frammentario nellepatti centromeridionali.Per l’Italia settentrionale (Padania) è abbondante come esti-vante e nidificante e scarsamente localizzata come svernante,mentre per il restodel territorio nazionale è più scarsa e localizzata.Nel censimento del 1981 venivanostimate 17500 coppie nidificanti in Italia (FASOLA e ALIERI,1992),pari al 41% dellapopolazione europea.La Lombardia nel 1981 ha ospitato il 56% della popolazioneitaliana e nel 1983-87 sono state occupate 24 garzaie (BRICHETTI e FASOLA,1990).
文摘In this study,live fledglings of Nycticorax nycticorax and Ardeola bacchus at the Huangpu District of Guangzhou City were collected,and their primary feather,breast feather,tail feather,liver,chest muscle and egg shell were sampled for mercury determination.The results showed that these two heron species had a very similar distribution pattern of mercury concentration in their tissues and organs,i.e.,tail feather > breast and primary feather > liver > chest muscle > egg shell.Ardeola bacchus had higher levels of mercury in all its tissues than Nycticorax nycticorax.There were significant interspecific differences in mercury level for breast feather and primary feather.Because the collection of breast feather is easier and not harmful to birds,it is better to use it rather than primary or tail feather to monitor environmental pollution.The mercury level in breast feather was ten times higher than that in liver,lower than that in tail feather,but not significantly different to that in primary feather.The mercury concentrations in the tissues of Nycticorax nycticorax and Ardeola bacchus from Huangpu District of Guangzhou were similar to those from the suburbs of Chengdu,Sichuan Province,but lower than those from Taihu Lake,Jiangsu Province and higher than those from Hong Kong.
