My TPR-Zaban by https://padlet.com/zaban_k/zytuj90k6s4v Fish Counters and their importance in technology for biodiversity. en-us 2019-02-17 22:55:48 UTC 2025-12-01 02:49:56 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Xmastree.png What is a Fish Counter? zaban_k https://padlet.com/zaban_k/zytuj90k6s4v/wish/332180285
  • They provide and estimated count of fish stock size in bodies of water- Marine Institute (2019)
  • 3 counter types- resistivity and infrared and optical
  • CCTV or image capturing technology are often partnered with counters Hernandez-Ontiveros, J. M. (2018)
  • Necessary in aquaculture farming- provide inventory, count, production  Hernandez-Ontiveros, J. M. (2018)
  • One of the most fundamental tools for hatchery/fish farm success Fan, L. (2013)
    • ]]>     2019-02-17 22:58:53 UTC https://padlet.com/zaban_k/zytuj90k6s4v/wish/332180285     https://padlet.com/zaban_k/zytuj90k6s4v/wish/336235414 A short video showing how they work]]> 2019-02-28 02:32:53 UTC https://padlet.com/zaban_k/zytuj90k6s4v/wish/336235414 Benefits of using Fish Counters zaban_k https://padlet.com/zaban_k/zytuj90k6s4v/wish/336237010
  • 94-98% accurate counting according to some studies when checked with digital image processing to help ID species and size. Hernandez-Ontiveros, J. M. (2018)
  • Efficient counting method
  • Decrease human error in counts
  • Increase counting success when fish overlap. Fan, L. (2013)
  • Decrease stress on fish during count Karplus, I. (2005)
    • ]]>     2019-02-28 02:42:04 UTC https://padlet.com/zaban_k/zytuj90k6s4v/wish/336237010     Negatives of using Fish Counters zaban_k https://padlet.com/zaban_k/zytuj90k6s4v/wish/336237162
  • Simultaneous passage of fish decreases the accuracy of the counter. Single channel counters increase count accuracy. Sheppard, J. J. (2015)
  • Documentation that the counter counted even when no fish went through  or only counted 1 when multiple fish went through Dunkley, D. A. (1982)
  • "The sensitivity of the counter varied inversely with water conductivity which varied inversely with discharge" Dunkley, D. A. (1982)
  • Water must be clear or debris could be counted Kindschi, G. A. (1991)
    • ]]>     2019-02-28 02:42:58 UTC https://padlet.com/zaban_k/zytuj90k6s4v/wish/336237162     Who uses fish counters? zaban_k https://padlet.com/zaban_k/zytuj90k6s4v/wish/336237364
  • Fisheries
  • Departments performing biological studies- ie DNR, USFWS, forest preserves
  • Aquaculture farming
    • ]]>     2019-02-28 02:44:00 UTC https://padlet.com/zaban_k/zytuj90k6s4v/wish/336237364     Sources zaban_k https://padlet.com/zaban_k/zytuj90k6s4v/wish/337275797 Dunkley, D. A. & Shearer, W. M. (1982). An assessment of the performance of a resistivity fish counter. Journal of Fish Biology, 20, 717-737.

    Fan, L. & Liu, Y. (2013). Automate fry counting using computer vision and multi-class least squares support vector machine. Aquaculture, 380, 91-98.

    Hernandez-Ontiveros, J. M., Inzunza-Gonzalez, E., Garcia-Guerrero, E. E., Lopez-Bonilla, O. R., Infante-Prieto, S. O., Cardenas-Valdez, J. R., & Tlelo-Cuautle, E. (2018). Development and implementation of a fish counter by using an embedded system. Computer and Electronics in Agriculture, 145, 53-62.

    Karplus, I., Alchanatis, V., & Zion, B. (2005). Guidance of groups of guppies (Poecilia reticulata) to allow sorting by computer vision. Aquacultural Engineering, 32, 509-520. https://doi.org/10.1016/j.aquaeng.2004.09.009

    Kindschi, G. A. & Barrows, F. T. (1991). Evaluation of an Electronic Counter for Walleye Fry. The Progressive Fish-Culturist, 53, 180-183. 

    Marine Institute. 2019. Retrieved from https://www.marine.ie/Home/site-area/areas-activity/fisheries-ecosystems/fish-counters

    Sheppard, J. J. & Bednarski, M. S. (2015). Utility of Single-Channel Electronic Resistivity Counters for Monitoring River Herring Populations. North American Journal of Fisheries Management, 35, 1144-1151. 
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