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Preliminary study of the effect of reward amount on tag-return rate for Red Drums in Tampa Bay, Florida
Murphy, M.D.; Taylor, R.G. (1991). Preliminary study of the effect of reward amount on tag-return rate for Red Drums in Tampa Bay, Florida. N. Am. J. Fish. Manage. 11(3): 471-474. hdl.handle.net/10.1577/1548-8675(1991)011<0471:PSOTEO>2.3.CO;2
In: North American Journal of Fisheries Management. American Fisheries Society: Lawrence. ISSN 0275-5947, more
Peer reviewed article

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Keyword
    Marine

Authors  Top 
  • Murphy, M.D.
  • Taylor, R.G.

Abstract
    A study of the effect of explicit monetary rewards on tag-reporting rate was conducted on the fishery for red drum Sciaenops ocellatus in Tampa Bay, Florida, during 1986–1987. No significant difference was detected among return rates (20%/year, pooled) for tags printed with the messages “REWARD,” US$5, $10, $20, $30, $40, or $50. However, the power of the chi-square goodness-of-fit test–that is, the probability of detecting a departure from the null hypothesis (that return rates are the same across reward categories) when such a departure exists–was only 0.42. Future studies should use reward categories that elicit a higher tag-return rate, thereby increasing the test's power to detect differences. We also recommend that the variability of return rate within reward categories be estimated and that more powerful parametric methods, such as analysis of variance, be used to test for differences among mean tag-return rates.

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