Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams
Abstract Stocking of fish into streams is a common practice in fisheries management to increase the yield for anglers and support fish populations. European otter (Lutra lutra) predation on fish stocks of both economical and recreational value causes conflicts in many European countries. However, th...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Sittenthaler, Marcia [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015 |
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| Schlagwörter: |
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| Anmerkung: |
© Deutsche Gesellschaft für Säugetierkunde 2015 |
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| Übergeordnetes Werk: |
Enthalten in: Mammalian biology - Amsterdam [u.a.] : Elsevier, 1999, 80(2015), 2 vom: 21. Jan., Seite 106-113 |
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| Übergeordnetes Werk: |
volume:80 ; year:2015 ; number:2 ; day:21 ; month:01 ; pages:106-113 |
| Links: |
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| DOI / URN: |
10.1016/j.mambio.2015.01.004 |
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SPR038809338 |
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| 520 | |a Abstract Stocking of fish into streams is a common practice in fisheries management to increase the yield for anglers and support fish populations. European otter (Lutra lutra) predation on fish stocks of both economical and recreational value causes conflicts in many European countries. However, these stocking activities may also attract additional predators to a site. This case study aimed to investigate whether stocking of fish leads to higher otter densities in linear freshwater habitats in Central Europe. Otter faeces and data on fish stocks were collected in the province of Lower Austria along two salmonid streams, which differ considerably in fisheries management strategies. We used non-invasive genetic sampling (NGS) methods (genetic analysis of otter faeces) to ascertain otter individuals. Prey fish populations were assessed comparing length frequencies and fish biomass obtained from electrofishing series and data on stocking measures. Individual identification and socio-spatial organisation of resident otters revealed similar otter densities for both streams with 0.22 and 0.23 resident adult otters per stream kilometre. Length frequency distribution and biomass of fish indicated disappearance of stocked specimen at the time of electrofishing surveys and showed no significant difference of fish stocks between the streams. These results suggest that stocking activities may not affect the number of otter territories along the two streams studied, because availability of stocked fish is limited to angling season. We conclude that stocked streams may provide seasonally important food resources for otters, but raise the question whether stocked fish substantially contribute to the diet to raise carrying capacity for otters in linear freshwater habitats throughout a year. Furthermore we discuss the efficiency of stocking measures in streams where both self-sustaining fish populations and fish-eating predators occur. | ||
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| 700 | 1 | |a Parz-Gollner, Rosemarie |4 aut | |
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10.1016/j.mambio.2015.01.004 doi (DE-627)SPR038809338 (SPR)j.mambio.2015.01.004-e DE-627 ger DE-627 rakwb eng Sittenthaler, Marcia verfasserin aut Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Deutsche Gesellschaft für Säugetierkunde 2015 Abstract Stocking of fish into streams is a common practice in fisheries management to increase the yield for anglers and support fish populations. European otter (Lutra lutra) predation on fish stocks of both economical and recreational value causes conflicts in many European countries. However, these stocking activities may also attract additional predators to a site. This case study aimed to investigate whether stocking of fish leads to higher otter densities in linear freshwater habitats in Central Europe. Otter faeces and data on fish stocks were collected in the province of Lower Austria along two salmonid streams, which differ considerably in fisheries management strategies. We used non-invasive genetic sampling (NGS) methods (genetic analysis of otter faeces) to ascertain otter individuals. Prey fish populations were assessed comparing length frequencies and fish biomass obtained from electrofishing series and data on stocking measures. Individual identification and socio-spatial organisation of resident otters revealed similar otter densities for both streams with 0.22 and 0.23 resident adult otters per stream kilometre. Length frequency distribution and biomass of fish indicated disappearance of stocked specimen at the time of electrofishing surveys and showed no significant difference of fish stocks between the streams. These results suggest that stocking activities may not affect the number of otter territories along the two streams studied, because availability of stocked fish is limited to angling season. We conclude that stocked streams may provide seasonally important food resources for otters, but raise the question whether stocked fish substantially contribute to the diet to raise carrying capacity for otters in linear freshwater habitats throughout a year. Furthermore we discuss the efficiency of stocking measures in streams where both self-sustaining fish populations and fish-eating predators occur. Fish stocking (dpeaa)DE-He213 Non-invasive genetic sampling (dpeaa)DE-He213 Population density (dpeaa)DE-He213 Otter faeces (dpeaa)DE-He213 Bayerl, Helmut aut Unfer, Günther aut Kuehn, Ralph aut Parz-Gollner, Rosemarie aut Enthalten in Mammalian biology Amsterdam [u.a.] : Elsevier, 1999 80(2015), 2 vom: 21. Jan., Seite 106-113 (DE-627)343512947 (DE-600)2072973-X 1618-1476 nnns volume:80 year:2015 number:2 day:21 month:01 pages:106-113 https://dx.doi.org/10.1016/j.mambio.2015.01.004 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER 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_138 GBV_ILN_150 GBV_ILN_151 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_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_2008 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_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_2118 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_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 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_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 80 2015 2 21 01 106-113 |
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10.1016/j.mambio.2015.01.004 doi (DE-627)SPR038809338 (SPR)j.mambio.2015.01.004-e DE-627 ger DE-627 rakwb eng Sittenthaler, Marcia verfasserin aut Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Deutsche Gesellschaft für Säugetierkunde 2015 Abstract Stocking of fish into streams is a common practice in fisheries management to increase the yield for anglers and support fish populations. European otter (Lutra lutra) predation on fish stocks of both economical and recreational value causes conflicts in many European countries. However, these stocking activities may also attract additional predators to a site. This case study aimed to investigate whether stocking of fish leads to higher otter densities in linear freshwater habitats in Central Europe. Otter faeces and data on fish stocks were collected in the province of Lower Austria along two salmonid streams, which differ considerably in fisheries management strategies. We used non-invasive genetic sampling (NGS) methods (genetic analysis of otter faeces) to ascertain otter individuals. Prey fish populations were assessed comparing length frequencies and fish biomass obtained from electrofishing series and data on stocking measures. Individual identification and socio-spatial organisation of resident otters revealed similar otter densities for both streams with 0.22 and 0.23 resident adult otters per stream kilometre. Length frequency distribution and biomass of fish indicated disappearance of stocked specimen at the time of electrofishing surveys and showed no significant difference of fish stocks between the streams. These results suggest that stocking activities may not affect the number of otter territories along the two streams studied, because availability of stocked fish is limited to angling season. We conclude that stocked streams may provide seasonally important food resources for otters, but raise the question whether stocked fish substantially contribute to the diet to raise carrying capacity for otters in linear freshwater habitats throughout a year. Furthermore we discuss the efficiency of stocking measures in streams where both self-sustaining fish populations and fish-eating predators occur. Fish stocking (dpeaa)DE-He213 Non-invasive genetic sampling (dpeaa)DE-He213 Population density (dpeaa)DE-He213 Otter faeces (dpeaa)DE-He213 Bayerl, Helmut aut Unfer, Günther aut Kuehn, Ralph aut Parz-Gollner, Rosemarie aut Enthalten in Mammalian biology Amsterdam [u.a.] : Elsevier, 1999 80(2015), 2 vom: 21. Jan., Seite 106-113 (DE-627)343512947 (DE-600)2072973-X 1618-1476 nnns volume:80 year:2015 number:2 day:21 month:01 pages:106-113 https://dx.doi.org/10.1016/j.mambio.2015.01.004 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER 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_138 GBV_ILN_150 GBV_ILN_151 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_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_2008 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_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_2118 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_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 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_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 80 2015 2 21 01 106-113 |
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10.1016/j.mambio.2015.01.004 doi (DE-627)SPR038809338 (SPR)j.mambio.2015.01.004-e DE-627 ger DE-627 rakwb eng Sittenthaler, Marcia verfasserin aut Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Deutsche Gesellschaft für Säugetierkunde 2015 Abstract Stocking of fish into streams is a common practice in fisheries management to increase the yield for anglers and support fish populations. European otter (Lutra lutra) predation on fish stocks of both economical and recreational value causes conflicts in many European countries. However, these stocking activities may also attract additional predators to a site. This case study aimed to investigate whether stocking of fish leads to higher otter densities in linear freshwater habitats in Central Europe. Otter faeces and data on fish stocks were collected in the province of Lower Austria along two salmonid streams, which differ considerably in fisheries management strategies. We used non-invasive genetic sampling (NGS) methods (genetic analysis of otter faeces) to ascertain otter individuals. Prey fish populations were assessed comparing length frequencies and fish biomass obtained from electrofishing series and data on stocking measures. Individual identification and socio-spatial organisation of resident otters revealed similar otter densities for both streams with 0.22 and 0.23 resident adult otters per stream kilometre. Length frequency distribution and biomass of fish indicated disappearance of stocked specimen at the time of electrofishing surveys and showed no significant difference of fish stocks between the streams. These results suggest that stocking activities may not affect the number of otter territories along the two streams studied, because availability of stocked fish is limited to angling season. We conclude that stocked streams may provide seasonally important food resources for otters, but raise the question whether stocked fish substantially contribute to the diet to raise carrying capacity for otters in linear freshwater habitats throughout a year. Furthermore we discuss the efficiency of stocking measures in streams where both self-sustaining fish populations and fish-eating predators occur. Fish stocking (dpeaa)DE-He213 Non-invasive genetic sampling (dpeaa)DE-He213 Population density (dpeaa)DE-He213 Otter faeces (dpeaa)DE-He213 Bayerl, Helmut aut Unfer, Günther aut Kuehn, Ralph aut Parz-Gollner, Rosemarie aut Enthalten in Mammalian biology Amsterdam [u.a.] : Elsevier, 1999 80(2015), 2 vom: 21. Jan., Seite 106-113 (DE-627)343512947 (DE-600)2072973-X 1618-1476 nnns volume:80 year:2015 number:2 day:21 month:01 pages:106-113 https://dx.doi.org/10.1016/j.mambio.2015.01.004 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER 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_138 GBV_ILN_150 GBV_ILN_151 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_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_2008 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_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_2118 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_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 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_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 80 2015 2 21 01 106-113 |
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10.1016/j.mambio.2015.01.004 doi (DE-627)SPR038809338 (SPR)j.mambio.2015.01.004-e DE-627 ger DE-627 rakwb eng Sittenthaler, Marcia verfasserin aut Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Deutsche Gesellschaft für Säugetierkunde 2015 Abstract Stocking of fish into streams is a common practice in fisheries management to increase the yield for anglers and support fish populations. European otter (Lutra lutra) predation on fish stocks of both economical and recreational value causes conflicts in many European countries. However, these stocking activities may also attract additional predators to a site. This case study aimed to investigate whether stocking of fish leads to higher otter densities in linear freshwater habitats in Central Europe. Otter faeces and data on fish stocks were collected in the province of Lower Austria along two salmonid streams, which differ considerably in fisheries management strategies. We used non-invasive genetic sampling (NGS) methods (genetic analysis of otter faeces) to ascertain otter individuals. Prey fish populations were assessed comparing length frequencies and fish biomass obtained from electrofishing series and data on stocking measures. Individual identification and socio-spatial organisation of resident otters revealed similar otter densities for both streams with 0.22 and 0.23 resident adult otters per stream kilometre. Length frequency distribution and biomass of fish indicated disappearance of stocked specimen at the time of electrofishing surveys and showed no significant difference of fish stocks between the streams. These results suggest that stocking activities may not affect the number of otter territories along the two streams studied, because availability of stocked fish is limited to angling season. We conclude that stocked streams may provide seasonally important food resources for otters, but raise the question whether stocked fish substantially contribute to the diet to raise carrying capacity for otters in linear freshwater habitats throughout a year. Furthermore we discuss the efficiency of stocking measures in streams where both self-sustaining fish populations and fish-eating predators occur. Fish stocking (dpeaa)DE-He213 Non-invasive genetic sampling (dpeaa)DE-He213 Population density (dpeaa)DE-He213 Otter faeces (dpeaa)DE-He213 Bayerl, Helmut aut Unfer, Günther aut Kuehn, Ralph aut Parz-Gollner, Rosemarie aut Enthalten in Mammalian biology Amsterdam [u.a.] : Elsevier, 1999 80(2015), 2 vom: 21. Jan., Seite 106-113 (DE-627)343512947 (DE-600)2072973-X 1618-1476 nnns volume:80 year:2015 number:2 day:21 month:01 pages:106-113 https://dx.doi.org/10.1016/j.mambio.2015.01.004 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER 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_138 GBV_ILN_150 GBV_ILN_151 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_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_2008 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_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_2118 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_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 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_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 80 2015 2 21 01 106-113 |
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10.1016/j.mambio.2015.01.004 doi (DE-627)SPR038809338 (SPR)j.mambio.2015.01.004-e DE-627 ger DE-627 rakwb eng Sittenthaler, Marcia verfasserin aut Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Deutsche Gesellschaft für Säugetierkunde 2015 Abstract Stocking of fish into streams is a common practice in fisheries management to increase the yield for anglers and support fish populations. European otter (Lutra lutra) predation on fish stocks of both economical and recreational value causes conflicts in many European countries. However, these stocking activities may also attract additional predators to a site. This case study aimed to investigate whether stocking of fish leads to higher otter densities in linear freshwater habitats in Central Europe. Otter faeces and data on fish stocks were collected in the province of Lower Austria along two salmonid streams, which differ considerably in fisheries management strategies. We used non-invasive genetic sampling (NGS) methods (genetic analysis of otter faeces) to ascertain otter individuals. Prey fish populations were assessed comparing length frequencies and fish biomass obtained from electrofishing series and data on stocking measures. Individual identification and socio-spatial organisation of resident otters revealed similar otter densities for both streams with 0.22 and 0.23 resident adult otters per stream kilometre. Length frequency distribution and biomass of fish indicated disappearance of stocked specimen at the time of electrofishing surveys and showed no significant difference of fish stocks between the streams. These results suggest that stocking activities may not affect the number of otter territories along the two streams studied, because availability of stocked fish is limited to angling season. We conclude that stocked streams may provide seasonally important food resources for otters, but raise the question whether stocked fish substantially contribute to the diet to raise carrying capacity for otters in linear freshwater habitats throughout a year. Furthermore we discuss the efficiency of stocking measures in streams where both self-sustaining fish populations and fish-eating predators occur. Fish stocking (dpeaa)DE-He213 Non-invasive genetic sampling (dpeaa)DE-He213 Population density (dpeaa)DE-He213 Otter faeces (dpeaa)DE-He213 Bayerl, Helmut aut Unfer, Günther aut Kuehn, Ralph aut Parz-Gollner, Rosemarie aut Enthalten in Mammalian biology Amsterdam [u.a.] : Elsevier, 1999 80(2015), 2 vom: 21. Jan., Seite 106-113 (DE-627)343512947 (DE-600)2072973-X 1618-1476 nnns volume:80 year:2015 number:2 day:21 month:01 pages:106-113 https://dx.doi.org/10.1016/j.mambio.2015.01.004 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER 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_138 GBV_ILN_150 GBV_ILN_151 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_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_2008 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_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_2118 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_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 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_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 80 2015 2 21 01 106-113 |
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Sittenthaler, Marcia |
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Sittenthaler, Marcia misc Fish stocking misc Non-invasive genetic sampling misc Population density misc Otter faeces Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams |
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Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams Fish stocking (dpeaa)DE-He213 Non-invasive genetic sampling (dpeaa)DE-He213 Population density (dpeaa)DE-He213 Otter faeces (dpeaa)DE-He213 |
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Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams |
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Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams |
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impact of fish stocking on eurasian otter (lutra lutra) densities: a case study on two salmonid streams |
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Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams |
| abstract |
Abstract Stocking of fish into streams is a common practice in fisheries management to increase the yield for anglers and support fish populations. European otter (Lutra lutra) predation on fish stocks of both economical and recreational value causes conflicts in many European countries. However, these stocking activities may also attract additional predators to a site. This case study aimed to investigate whether stocking of fish leads to higher otter densities in linear freshwater habitats in Central Europe. Otter faeces and data on fish stocks were collected in the province of Lower Austria along two salmonid streams, which differ considerably in fisheries management strategies. We used non-invasive genetic sampling (NGS) methods (genetic analysis of otter faeces) to ascertain otter individuals. Prey fish populations were assessed comparing length frequencies and fish biomass obtained from electrofishing series and data on stocking measures. Individual identification and socio-spatial organisation of resident otters revealed similar otter densities for both streams with 0.22 and 0.23 resident adult otters per stream kilometre. Length frequency distribution and biomass of fish indicated disappearance of stocked specimen at the time of electrofishing surveys and showed no significant difference of fish stocks between the streams. These results suggest that stocking activities may not affect the number of otter territories along the two streams studied, because availability of stocked fish is limited to angling season. We conclude that stocked streams may provide seasonally important food resources for otters, but raise the question whether stocked fish substantially contribute to the diet to raise carrying capacity for otters in linear freshwater habitats throughout a year. Furthermore we discuss the efficiency of stocking measures in streams where both self-sustaining fish populations and fish-eating predators occur. © Deutsche Gesellschaft für Säugetierkunde 2015 |
| abstractGer |
Abstract Stocking of fish into streams is a common practice in fisheries management to increase the yield for anglers and support fish populations. European otter (Lutra lutra) predation on fish stocks of both economical and recreational value causes conflicts in many European countries. However, these stocking activities may also attract additional predators to a site. This case study aimed to investigate whether stocking of fish leads to higher otter densities in linear freshwater habitats in Central Europe. Otter faeces and data on fish stocks were collected in the province of Lower Austria along two salmonid streams, which differ considerably in fisheries management strategies. We used non-invasive genetic sampling (NGS) methods (genetic analysis of otter faeces) to ascertain otter individuals. Prey fish populations were assessed comparing length frequencies and fish biomass obtained from electrofishing series and data on stocking measures. Individual identification and socio-spatial organisation of resident otters revealed similar otter densities for both streams with 0.22 and 0.23 resident adult otters per stream kilometre. Length frequency distribution and biomass of fish indicated disappearance of stocked specimen at the time of electrofishing surveys and showed no significant difference of fish stocks between the streams. These results suggest that stocking activities may not affect the number of otter territories along the two streams studied, because availability of stocked fish is limited to angling season. We conclude that stocked streams may provide seasonally important food resources for otters, but raise the question whether stocked fish substantially contribute to the diet to raise carrying capacity for otters in linear freshwater habitats throughout a year. Furthermore we discuss the efficiency of stocking measures in streams where both self-sustaining fish populations and fish-eating predators occur. © Deutsche Gesellschaft für Säugetierkunde 2015 |
| abstract_unstemmed |
Abstract Stocking of fish into streams is a common practice in fisheries management to increase the yield for anglers and support fish populations. European otter (Lutra lutra) predation on fish stocks of both economical and recreational value causes conflicts in many European countries. However, these stocking activities may also attract additional predators to a site. This case study aimed to investigate whether stocking of fish leads to higher otter densities in linear freshwater habitats in Central Europe. Otter faeces and data on fish stocks were collected in the province of Lower Austria along two salmonid streams, which differ considerably in fisheries management strategies. We used non-invasive genetic sampling (NGS) methods (genetic analysis of otter faeces) to ascertain otter individuals. Prey fish populations were assessed comparing length frequencies and fish biomass obtained from electrofishing series and data on stocking measures. Individual identification and socio-spatial organisation of resident otters revealed similar otter densities for both streams with 0.22 and 0.23 resident adult otters per stream kilometre. Length frequency distribution and biomass of fish indicated disappearance of stocked specimen at the time of electrofishing surveys and showed no significant difference of fish stocks between the streams. These results suggest that stocking activities may not affect the number of otter territories along the two streams studied, because availability of stocked fish is limited to angling season. We conclude that stocked streams may provide seasonally important food resources for otters, but raise the question whether stocked fish substantially contribute to the diet to raise carrying capacity for otters in linear freshwater habitats throughout a year. Furthermore we discuss the efficiency of stocking measures in streams where both self-sustaining fish populations and fish-eating predators occur. © Deutsche Gesellschaft für Säugetierkunde 2015 |
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Impact of fish stocking on Eurasian otter (Lutra lutra) densities: A case study on two salmonid streams |
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https://dx.doi.org/10.1016/j.mambio.2015.01.004 |
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Bayerl, Helmut Unfer, Günther Kuehn, Ralph Parz-Gollner, Rosemarie |
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10.1016/j.mambio.2015.01.004 |
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2024-07-03T20:07:39.835Z |
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| score |
7.40028 |