Fewer animals needed in fisheries research thanks to video and crowdsourcing

Scope of the method

The Method relates to
  • Animal health
The Method is situated in
  • Education and training
Type of method
  • Other
video and crowdsourcing
This method makes use of
  • Animal derived cells / tissues / organs


Method keywords
  • fish
  • reflex
  • video
  • training
Scientific area keywords
  • fisheries
  • survival
  • reflex
Method description

Reflex tests on fish which are used to determine the stress state and survival rate after discards must be correctly conducted and interpreted, and therefore require training. Thanks to ILVO research on the use of video and crowdsourcing (product improvement based on the knowledge and skills of users), fewer laboratory animals will be needed in the near future.

Method status
  • Published in peer reviewed journal

Pros, cons & Future potential


Reliability and repeatability are essential in the observations we make on the vitality of live caught fish. A series of video clips allows us to train students, veterinarians and fisheries researchers, but we can also compare a series of interpretations of the same clips by different people - crowdsourcing. Interpretation of the same clips can also be repeated by the same people (duplication). In this way we were able to demonstrate that our measurement method is reliable and that even people without prior knowledge can make good observations with this training.

  • There are two major bottlenecks here:
  • - Observations must be unbiased and repeatable. For example, an observer should not be influenced by foreknowledge (e.g. "That sole has been floundering on dry land for 5 minutes so its reflexes won’t be up to speed anymore").
  • - New observers require training, either with newly caught fish, or with fish kept in the laboratory for that purpose.

References, associated documents and other information

Associated documents
Website text ILVO


Instituut voor Landbouw-, Visserij- en Voedingsonderzoek (ILVO)
Animal Research

Alaska Fisheries Science Center