Monitoring lake populations of Eastern Sand Darter (Ammocrypta pellucida): a comparison of two seines
For many imperiled fishes in the Laurentian Great Lakes basin, detection protocols and population monitoring programs are lacking. In this study, we used a repeat-sampling approach to compare the effectiveness of two seines (bag and beach) to detect and characterize the abundance of lake-dwelling po...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2017-01-01
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| Series: | Journal of Freshwater Ecology |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/02705060.2017.1344734 |
| _version_ | 1818275037687316480 |
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| author | Scott M. Reid Alan J. Dextrase |
| author_facet | Scott M. Reid Alan J. Dextrase |
| author_sort | Scott M. Reid |
| collection | DOAJ |
| description | For many imperiled fishes in the Laurentian Great Lakes basin, detection protocols and population monitoring programs are lacking. In this study, we used a repeat-sampling approach to compare the effectiveness of two seines (bag and beach) to detect and characterize the abundance of lake-dwelling populations of Eastern Sand Darter (Ammocrypta pellucida); a threatened species in Canada. Compared to the bag seine, the larger beach seine collected a greater number of Eastern Sand Darter and detected the species at more sampling sites. Model-averaged estimates of detection probability were also greater for the beach seine (p = 0.72) than bag seine (p = 0.48). A decline in catch over repeated seine hauls occurred at less than a third of the sample units. Mean capture probabilities were 0.41 in units sampled by beach seine, and 0.37 in units sampled by bag seine, when depletion occurred. Sizes of Eastern Sand Darter collected by each seine were significantly different, with fewer small (<40 mm total length) individuals found in bag seine hauls. Power analyses indicate that data collected with either seine are expected to detect changes in local distribution of 50% or greater. Power to detect future changes in Eastern Sand Darter abundance of 50% or greater is predicted to be higher for the beach seine, and to increase with the number of seine hauls at a site. Catch differences between seines are interpreted to reflect the greater area sampled by the larger beach seine. |
| first_indexed | 2024-12-12T22:23:23Z |
| format | Article |
| id | doaj.art-d02ffe2e10c3409ca0fc38a72794e0b0 |
| institution | Directory Open Access Journal |
| issn | 0270-5060 2156-6941 |
| language | English |
| last_indexed | 2024-12-12T22:23:23Z |
| publishDate | 2017-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Freshwater Ecology |
| spelling | doaj.art-d02ffe2e10c3409ca0fc38a72794e0b02022-12-22T00:09:51ZengTaylor & Francis GroupJournal of Freshwater Ecology0270-50602156-69412017-01-0132149951110.1080/02705060.2017.13447341344734Monitoring lake populations of Eastern Sand Darter (Ammocrypta pellucida): a comparison of two seinesScott M. Reid0Alan J. Dextrase1Trent UniversityOntario Ministry of Natural Resources and ForestryFor many imperiled fishes in the Laurentian Great Lakes basin, detection protocols and population monitoring programs are lacking. In this study, we used a repeat-sampling approach to compare the effectiveness of two seines (bag and beach) to detect and characterize the abundance of lake-dwelling populations of Eastern Sand Darter (Ammocrypta pellucida); a threatened species in Canada. Compared to the bag seine, the larger beach seine collected a greater number of Eastern Sand Darter and detected the species at more sampling sites. Model-averaged estimates of detection probability were also greater for the beach seine (p = 0.72) than bag seine (p = 0.48). A decline in catch over repeated seine hauls occurred at less than a third of the sample units. Mean capture probabilities were 0.41 in units sampled by beach seine, and 0.37 in units sampled by bag seine, when depletion occurred. Sizes of Eastern Sand Darter collected by each seine were significantly different, with fewer small (<40 mm total length) individuals found in bag seine hauls. Power analyses indicate that data collected with either seine are expected to detect changes in local distribution of 50% or greater. Power to detect future changes in Eastern Sand Darter abundance of 50% or greater is predicted to be higher for the beach seine, and to increase with the number of seine hauls at a site. Catch differences between seines are interpreted to reflect the greater area sampled by the larger beach seine.http://dx.doi.org/10.1080/02705060.2017.1344734Samplingmonitoringendangered speciesdetection probabilitypower analysis |
| spellingShingle | Scott M. Reid Alan J. Dextrase Monitoring lake populations of Eastern Sand Darter (Ammocrypta pellucida): a comparison of two seines Journal of Freshwater Ecology Sampling monitoring endangered species detection probability power analysis |
| title | Monitoring lake populations of Eastern Sand Darter (Ammocrypta pellucida): a comparison of two seines |
| title_full | Monitoring lake populations of Eastern Sand Darter (Ammocrypta pellucida): a comparison of two seines |
| title_fullStr | Monitoring lake populations of Eastern Sand Darter (Ammocrypta pellucida): a comparison of two seines |
| title_full_unstemmed | Monitoring lake populations of Eastern Sand Darter (Ammocrypta pellucida): a comparison of two seines |
| title_short | Monitoring lake populations of Eastern Sand Darter (Ammocrypta pellucida): a comparison of two seines |
| title_sort | monitoring lake populations of eastern sand darter ammocrypta pellucida a comparison of two seines |
| topic | Sampling monitoring endangered species detection probability power analysis |
| url | http://dx.doi.org/10.1080/02705060.2017.1344734 |
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