برآورد جمعيت ول حفار غربي Ellobius lutescens با استفاده از روش هاي فاصله اي درشهرستان همدان

Estimating Western mole-vole (Ellobius lutescens) Population Size Using Distance methods In Hamedan Province

زﻣﯿﻨﻪ و ﻫﺪف: آﮔﺎﻫﯽ از اﻧﺪازه ﺟﻤﻌﯿﺖ ﻫﺎي ﺟﺎﻧﻮران ﺑﺮاي ﻣﺪﯾﺮﯾﺖ و ﺣﻔﺎﻇﺖ ﺣﯿﺎت وﺣﺶ ﺑﺴﯿﺎر ﻣﻬﻢ و ﭘﯿﺶ ﻧﯿﺎز اﺻﻠﯽ ﻣﺪﯾﺮﯾﺖ ﻣﻮﺛﺮ ﺣﯿﺎت وﺣﺶ اﺳﺖ. ﮔﻮﻧﻪ ول ﺣﻔﺎر ﻏﺮﺑﯽ ﺑﻪ دﻟﯿﻞ اﺳﺘﺮاﺗﮋي ﺧﺎص ﺣﯿﺎت ﻣﺜﻞ زﻧﺪﮔﯽ زﯾﺮزﻣﯿﻨﯽ، ﮐﻢ ﺗﺮ ﻣﻮرد ﺗﻮﺟﻪ ﻣﺘﺨﺼﺼﯿﻦ ﺑﻮده اﺳﺖ و ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ اﯾﻦ ﮐﻪ ﯾﮑﯽ از اﻃﻼﻋﺎت اوﻟﯿﻪ و ﻣﻮرد ﻧﯿﺎز ﺑﺮاي ﻣﺪﯾﺮﯾﺖ ﺣﯿﺎت وﺣﺶ ﺑﺮاي ﻫﺮ ﮔﻮﻧﻪ، ﺗﻌﯿﯿﻦ ﻓﺮاواﻧﯽ آن اﺳﺖ، ﺑﻪ ﻫﻤﯿﻦ ﻣﻨﻈﻮر ﺑﻪ ﺑﺮآورد ﺟﻤﻌﯿﺖ ول ﺣﻔﺎر ﭘﺮداﺧﺘﻪ ﺷﺪه اﺳﺖ. روش ﺑﺮرﺳﯽ: در اﯾﻦ ﭘﮋوﻫﺶ از دو روش ﻓﺎﺻﻠﻪ اي )روش T ﻣﺮﺑﻊ و روش ﭘﯿﺖ و راﯾﭙﻠﯽ( اﺳﺘﻔﺎده ﺷﺪه اﺳﺖ. اﯾﻦ روش ﻫﺎ ﻧﯿﺎزﻣﻨﺪ اﺳﺘﻔﺎده از ﭘﻼت، ﮐﻮادرات و ﻧﺸﺎﻧﻪ ﮔﺬاري اﻓﺮاد ﻧﯿﺴﺘﻨﺪ و ﺑﻪ ﻋﻨﻮان روش ﻫﺎي ﺑﺪون ﭘﻼت ﻣﺸﻬﻮرﻧﺪ.ﻫﻢ ﭼﻨﯿﻦ ﺑﺮاي ﺗﻌﯿﯿﻦ اﻧﺪازه ﻧﻤﻮﻧﻪ از روش ﺳﯿﺒﺮ)1982( و ﺑﺮاي ﺗﻌﯿﯿﻦ ﻃﻮل ﮐﻠﯽ ﺗﺮاﻧﺴﮑﺖ ﻫﺎ از ﻓﺮﻣﻮل ﺑﺎرﻧﻬﺎم و ﻫﻤﮑﺎران )1980( و از ﻧﺮم اﻓﺰار Ecological Methodologyاﺳﺘﻔﺎده ﮔﺮدﯾﺪه اﺳﺖ. ﯾﺎﻓﺘﻪ ﻫﺎ: در روش T ﻣﺮﺑﻊ ﺑﺎ اﻧﺪازه ﻧﻤﻮﻧﻪ 27=n، ﻣﯿﺰان ﺗﺮاﮐﻢ 56 ﻓﺮد در ﻫﮑﺘﺎر ﻣﺤﺎﺳﺒﻪ ﺷﺪ ﮐﻪ ﺑﺎ ﺳﻄﺢ اﺣﺘﻤﺎل 95% داراي ﺑﺎزه اي در ﺣﺪود 38/44 ﺗﺎ 63/8 )0,0039=S.E ( ﻣﯽ ﺑﺎﺷﺪ. در روش ﭘﯿﺖ و راﯾﭙﻠﯽ، ﺑﺎ اﻧﺪازه ﻧﻤﻮﻧﻪ 27=n، ﻣﯿﺰان ﺗﺮاﮐﻢ ول ﺣﻔﺎر ﻏﺮﺑﯽ 49 ﻓﺮد در ﻫﮑﺘﺎر ﻣﺤﺎﺳﺒﻪ ﺷﺪه ﮐﻪ در ﺳﻄﺢ اﺣﺘﻤﺎل 95% داراي ﺑﺎزه اي در ﺣﺪود 45/2 ﺗﺎ 52/6 )0,00076 =S.E (ﻣﯽ ﺑﺎﺷﺪ.

Background and Objectives: knowledge about the animal Population size is important for Wildlife management and is the main requirement tool for management and is the prerequisite for management. Western mole-vole have special life. It has underground life and for this reason the researchers have been little attention to it. Estimating abundance is important and first information that use wildlife management. Therefore study estimating abundance is done for this species. Method: We use to distance models (T-square sampling and Byth and Ripley). This models don’t need plot and quadrats and Using Seber (1982) model for sample size. Also we use Burnham et al. (1980) for total length of transect and using Ecological Methodology software. Findings: The T-square method, the sample size n=27, density was estimated 56 species per hectare that the 95% confidence interval limits of 38/44 to 63/8 species per hectare (SE=0/0039). The Byth and Ripley method, the sample size n=27, density was estimated 49 species per hectare that the 95% confidence interval limits of 45/2 to 52/6 species per hectare (SE=0/00076). Discussion and Conclusion: The final mean population size was considered 50 species per hectare.