Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques

Abstract Monitoring elusive species, which are ‘difficult to study’, often relies on the use of indirect indices to estimate relative abundance. It is important to know the accuracy of such indices and factors affecting it. For the American mink Mustela vison (an invasive species of conservation con...
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Gespeichert in:

Autor*in:	Harrington, Lauren A. [verfasserIn] Harrington, Andrew L. [verfasserIn] Macdonald, David W. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2007

Schlagwörter:	Sign surveys Scats Tracks

Übergeordnetes Werk:	Enthalten in: European journal of wildlife research - Berlin : Springer, 1955, 54(2007), 1 vom: 13. Juli, Seite 79-87
Übergeordnetes Werk:	volume:54 ; year:2007 ; number:1 ; day:13 ; month:07 ; pages:79-87

Links:	Volltext

DOI / URN:	10.1007/s10344-007-0114-2

Katalog-ID:	SPR009754768

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520			\|a Abstract Monitoring elusive species, which are ‘difficult to study’, often relies on the use of indirect indices to estimate relative abundance. It is important to know the accuracy of such indices and factors affecting it. For the American mink Mustela vison (an invasive species of conservation concern in the UK), we compare two indices of relative abundance: sign surveys (based on the detection of scats) and a new method based on the use of tracking plates on rafts. We found that raft surveys consistently performed better than did sign surveys and that estimates of relative abundance derived from both raft and sign surveys were linearly related to the number of individuals captured (but statistically significantly so only for raft surveys). Although both indices were highly correlated, there was considerable unexplained variation in the relationship between them. No statistically significant seasonal effects were detected for either method. Costs of the two methods were comparable after the first 2 years (based on four surveys per year), although raft surveys were more economical than were sign surveys in the longer term. In areas where polecats M. putorius are sympatric with mink, it will be important to develop methods to minimise confusion between the tracks of polecats and mink.
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matchkey_str	article:14390574:2007----::siaighrltvaudnefmrcnikutlvsnnolnrvreauto
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allfields	10.1007/s10344-007-0114-2 doi (DE-627)SPR009754768 (SPR)s10344-007-0114-2-e DE-627 ger DE-627 rakwb eng 590 ASE 630 640 ASE 48.66 bkl Harrington, Lauren A. verfasserin aut Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Monitoring elusive species, which are ‘difficult to study’, often relies on the use of indirect indices to estimate relative abundance. It is important to know the accuracy of such indices and factors affecting it. For the American mink Mustela vison (an invasive species of conservation concern in the UK), we compare two indices of relative abundance: sign surveys (based on the detection of scats) and a new method based on the use of tracking plates on rafts. We found that raft surveys consistently performed better than did sign surveys and that estimates of relative abundance derived from both raft and sign surveys were linearly related to the number of individuals captured (but statistically significantly so only for raft surveys). Although both indices were highly correlated, there was considerable unexplained variation in the relationship between them. No statistically significant seasonal effects were detected for either method. Costs of the two methods were comparable after the first 2 years (based on four surveys per year), although raft surveys were more economical than were sign surveys in the longer term. In areas where polecats M. putorius are sympatric with mink, it will be important to develop methods to minimise confusion between the tracks of polecats and mink. Sign surveys (dpeaa)DE-He213 Scats (dpeaa)DE-He213 Tracks (dpeaa)DE-He213 Harrington, Andrew L. verfasserin aut Macdonald, David W. verfasserin aut Enthalten in European journal of wildlife research Berlin : Springer, 1955 54(2007), 1 vom: 13. Juli, Seite 79-87 (DE-627)382928288 (DE-600)2140087-8 1439-0574 nnns volume:54 year:2007 number:1 day:13 month:07 pages:79-87 https://dx.doi.org/10.1007/s10344-007-0114-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-FOR SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_252 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 48.66 ASE AR 54 2007 1 13 07 79-87
spelling	10.1007/s10344-007-0114-2 doi (DE-627)SPR009754768 (SPR)s10344-007-0114-2-e DE-627 ger DE-627 rakwb eng 590 ASE 630 640 ASE 48.66 bkl Harrington, Lauren A. verfasserin aut Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Monitoring elusive species, which are ‘difficult to study’, often relies on the use of indirect indices to estimate relative abundance. It is important to know the accuracy of such indices and factors affecting it. For the American mink Mustela vison (an invasive species of conservation concern in the UK), we compare two indices of relative abundance: sign surveys (based on the detection of scats) and a new method based on the use of tracking plates on rafts. We found that raft surveys consistently performed better than did sign surveys and that estimates of relative abundance derived from both raft and sign surveys were linearly related to the number of individuals captured (but statistically significantly so only for raft surveys). Although both indices were highly correlated, there was considerable unexplained variation in the relationship between them. No statistically significant seasonal effects were detected for either method. Costs of the two methods were comparable after the first 2 years (based on four surveys per year), although raft surveys were more economical than were sign surveys in the longer term. In areas where polecats M. putorius are sympatric with mink, it will be important to develop methods to minimise confusion between the tracks of polecats and mink. Sign surveys (dpeaa)DE-He213 Scats (dpeaa)DE-He213 Tracks (dpeaa)DE-He213 Harrington, Andrew L. verfasserin aut Macdonald, David W. verfasserin aut Enthalten in European journal of wildlife research Berlin : Springer, 1955 54(2007), 1 vom: 13. Juli, Seite 79-87 (DE-627)382928288 (DE-600)2140087-8 1439-0574 nnns volume:54 year:2007 number:1 day:13 month:07 pages:79-87 https://dx.doi.org/10.1007/s10344-007-0114-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-FOR SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_252 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 48.66 ASE AR 54 2007 1 13 07 79-87
allfields_unstemmed	10.1007/s10344-007-0114-2 doi (DE-627)SPR009754768 (SPR)s10344-007-0114-2-e DE-627 ger DE-627 rakwb eng 590 ASE 630 640 ASE 48.66 bkl Harrington, Lauren A. verfasserin aut Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Monitoring elusive species, which are ‘difficult to study’, often relies on the use of indirect indices to estimate relative abundance. It is important to know the accuracy of such indices and factors affecting it. For the American mink Mustela vison (an invasive species of conservation concern in the UK), we compare two indices of relative abundance: sign surveys (based on the detection of scats) and a new method based on the use of tracking plates on rafts. We found that raft surveys consistently performed better than did sign surveys and that estimates of relative abundance derived from both raft and sign surveys were linearly related to the number of individuals captured (but statistically significantly so only for raft surveys). Although both indices were highly correlated, there was considerable unexplained variation in the relationship between them. No statistically significant seasonal effects were detected for either method. Costs of the two methods were comparable after the first 2 years (based on four surveys per year), although raft surveys were more economical than were sign surveys in the longer term. In areas where polecats M. putorius are sympatric with mink, it will be important to develop methods to minimise confusion between the tracks of polecats and mink. Sign surveys (dpeaa)DE-He213 Scats (dpeaa)DE-He213 Tracks (dpeaa)DE-He213 Harrington, Andrew L. verfasserin aut Macdonald, David W. verfasserin aut Enthalten in European journal of wildlife research Berlin : Springer, 1955 54(2007), 1 vom: 13. Juli, Seite 79-87 (DE-627)382928288 (DE-600)2140087-8 1439-0574 nnns volume:54 year:2007 number:1 day:13 month:07 pages:79-87 https://dx.doi.org/10.1007/s10344-007-0114-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-FOR SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_252 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 48.66 ASE AR 54 2007 1 13 07 79-87
allfieldsGer	10.1007/s10344-007-0114-2 doi (DE-627)SPR009754768 (SPR)s10344-007-0114-2-e DE-627 ger DE-627 rakwb eng 590 ASE 630 640 ASE 48.66 bkl Harrington, Lauren A. verfasserin aut Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Monitoring elusive species, which are ‘difficult to study’, often relies on the use of indirect indices to estimate relative abundance. It is important to know the accuracy of such indices and factors affecting it. For the American mink Mustela vison (an invasive species of conservation concern in the UK), we compare two indices of relative abundance: sign surveys (based on the detection of scats) and a new method based on the use of tracking plates on rafts. We found that raft surveys consistently performed better than did sign surveys and that estimates of relative abundance derived from both raft and sign surveys were linearly related to the number of individuals captured (but statistically significantly so only for raft surveys). Although both indices were highly correlated, there was considerable unexplained variation in the relationship between them. No statistically significant seasonal effects were detected for either method. Costs of the two methods were comparable after the first 2 years (based on four surveys per year), although raft surveys were more economical than were sign surveys in the longer term. In areas where polecats M. putorius are sympatric with mink, it will be important to develop methods to minimise confusion between the tracks of polecats and mink. Sign surveys (dpeaa)DE-He213 Scats (dpeaa)DE-He213 Tracks (dpeaa)DE-He213 Harrington, Andrew L. verfasserin aut Macdonald, David W. verfasserin aut Enthalten in European journal of wildlife research Berlin : Springer, 1955 54(2007), 1 vom: 13. Juli, Seite 79-87 (DE-627)382928288 (DE-600)2140087-8 1439-0574 nnns volume:54 year:2007 number:1 day:13 month:07 pages:79-87 https://dx.doi.org/10.1007/s10344-007-0114-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-FOR SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_252 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 48.66 ASE AR 54 2007 1 13 07 79-87
allfieldsSound	10.1007/s10344-007-0114-2 doi (DE-627)SPR009754768 (SPR)s10344-007-0114-2-e DE-627 ger DE-627 rakwb eng 590 ASE 630 640 ASE 48.66 bkl Harrington, Lauren A. verfasserin aut Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Monitoring elusive species, which are ‘difficult to study’, often relies on the use of indirect indices to estimate relative abundance. It is important to know the accuracy of such indices and factors affecting it. For the American mink Mustela vison (an invasive species of conservation concern in the UK), we compare two indices of relative abundance: sign surveys (based on the detection of scats) and a new method based on the use of tracking plates on rafts. We found that raft surveys consistently performed better than did sign surveys and that estimates of relative abundance derived from both raft and sign surveys were linearly related to the number of individuals captured (but statistically significantly so only for raft surveys). Although both indices were highly correlated, there was considerable unexplained variation in the relationship between them. No statistically significant seasonal effects were detected for either method. Costs of the two methods were comparable after the first 2 years (based on four surveys per year), although raft surveys were more economical than were sign surveys in the longer term. In areas where polecats M. putorius are sympatric with mink, it will be important to develop methods to minimise confusion between the tracks of polecats and mink. Sign surveys (dpeaa)DE-He213 Scats (dpeaa)DE-He213 Tracks (dpeaa)DE-He213 Harrington, Andrew L. verfasserin aut Macdonald, David W. verfasserin aut Enthalten in European journal of wildlife research Berlin : Springer, 1955 54(2007), 1 vom: 13. Juli, Seite 79-87 (DE-627)382928288 (DE-600)2140087-8 1439-0574 nnns volume:54 year:2007 number:1 day:13 month:07 pages:79-87 https://dx.doi.org/10.1007/s10344-007-0114-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-FOR SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_252 GBV_ILN_267 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_647 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 48.66 ASE AR 54 2007 1 13 07 79-87
language	English
source	Enthalten in European journal of wildlife research 54(2007), 1 vom: 13. Juli, Seite 79-87 volume:54 year:2007 number:1 day:13 month:07 pages:79-87
sourceStr	Enthalten in European journal of wildlife research 54(2007), 1 vom: 13. Juli, Seite 79-87 volume:54 year:2007 number:1 day:13 month:07 pages:79-87
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Sign surveys Scats Tracks
dewey-raw	590
isfreeaccess_bool	false
container_title	European journal of wildlife research
authorswithroles_txt_mv	Harrington, Lauren A. @@aut@@ Harrington, Andrew L. @@aut@@ Macdonald, David W. @@aut@@
publishDateDaySort_date	2007-07-13T00:00:00Z
hierarchy_top_id	382928288
dewey-sort	3590
id	SPR009754768
language_de	englisch
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author	Harrington, Lauren A.
spellingShingle	Harrington, Lauren A. ddc 590 ddc 630 bkl 48.66 misc Sign surveys misc Scats misc Tracks Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques
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topic_title	590 ASE 630 640 ASE 48.66 bkl Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques Sign surveys (dpeaa)DE-He213 Scats (dpeaa)DE-He213 Tracks (dpeaa)DE-He213
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title	Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques
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title_full	Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques
author_sort	Harrington, Lauren A.
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title_sort	estimating the relative abundance of american mink mustela vison on lowland rivers: evaluation and comparison of two techniques
title_auth	Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques
abstract	Abstract Monitoring elusive species, which are ‘difficult to study’, often relies on the use of indirect indices to estimate relative abundance. It is important to know the accuracy of such indices and factors affecting it. For the American mink Mustela vison (an invasive species of conservation concern in the UK), we compare two indices of relative abundance: sign surveys (based on the detection of scats) and a new method based on the use of tracking plates on rafts. We found that raft surveys consistently performed better than did sign surveys and that estimates of relative abundance derived from both raft and sign surveys were linearly related to the number of individuals captured (but statistically significantly so only for raft surveys). Although both indices were highly correlated, there was considerable unexplained variation in the relationship between them. No statistically significant seasonal effects were detected for either method. Costs of the two methods were comparable after the first 2 years (based on four surveys per year), although raft surveys were more economical than were sign surveys in the longer term. In areas where polecats M. putorius are sympatric with mink, it will be important to develop methods to minimise confusion between the tracks of polecats and mink.
abstractGer	Abstract Monitoring elusive species, which are ‘difficult to study’, often relies on the use of indirect indices to estimate relative abundance. It is important to know the accuracy of such indices and factors affecting it. For the American mink Mustela vison (an invasive species of conservation concern in the UK), we compare two indices of relative abundance: sign surveys (based on the detection of scats) and a new method based on the use of tracking plates on rafts. We found that raft surveys consistently performed better than did sign surveys and that estimates of relative abundance derived from both raft and sign surveys were linearly related to the number of individuals captured (but statistically significantly so only for raft surveys). Although both indices were highly correlated, there was considerable unexplained variation in the relationship between them. No statistically significant seasonal effects were detected for either method. Costs of the two methods were comparable after the first 2 years (based on four surveys per year), although raft surveys were more economical than were sign surveys in the longer term. In areas where polecats M. putorius are sympatric with mink, it will be important to develop methods to minimise confusion between the tracks of polecats and mink.
abstract_unstemmed	Abstract Monitoring elusive species, which are ‘difficult to study’, often relies on the use of indirect indices to estimate relative abundance. It is important to know the accuracy of such indices and factors affecting it. For the American mink Mustela vison (an invasive species of conservation concern in the UK), we compare two indices of relative abundance: sign surveys (based on the detection of scats) and a new method based on the use of tracking plates on rafts. We found that raft surveys consistently performed better than did sign surveys and that estimates of relative abundance derived from both raft and sign surveys were linearly related to the number of individuals captured (but statistically significantly so only for raft surveys). Although both indices were highly correlated, there was considerable unexplained variation in the relationship between them. No statistically significant seasonal effects were detected for either method. Costs of the two methods were comparable after the first 2 years (based on four surveys per year), although raft surveys were more economical than were sign surveys in the longer term. In areas where polecats M. putorius are sympatric with mink, it will be important to develop methods to minimise confusion between the tracks of polecats and mink.
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title_short	Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques
url	https://dx.doi.org/10.1007/s10344-007-0114-2
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Estimating the relative abundance of American mink Mustela vison on lowland rivers: evaluation and comparison of two techniques

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