A combined telemetry - tag return approach to estimate fishing and natural mortality rates of an estuarine fish
Canadian Journal of Fisheries and Aquatic Sciences
By: N.M. Bacheler, J.A. Buckel, J.E. Hightower, L.M. Paramore, and K. H. Pollock
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Abstract
A joint analysis of tag return and telemetry data should improve estimates of mortality rates for exploited fishes; however, the combined approach has thus far only been tested in terrestrial systems. We tagged subadult red drum (Sciaenops ocellatus) with conventional tags and ultrasonic transmitters over 3 years in coastal North Carolina, USA, to test the efficacy of the combined telemetry - tag return approach. There was a strong seasonal pattern to monthly fishing mortality rate (F) estimates from both conventional and telemetry tags; highest F values occurred in fall months and lowest levels occurred during winter. Although monthly F values were similar in pattern and magnitude between conventional tagging and telemetry, information on F in the combined model came primarily from conventional tags. The estimated natural mortality rate (M) in the combined model was low (estimated annual rate ?? standard error: 0.04 ?? 0.04) and was based primarily upon the telemetry approach. Using high-reward tagging, we estimated different tag reporting rates for state agency and university tagging programs. The combined telemetry - tag return approach can be an effective approach for estimating F and M as long as several key assumptions of the model are met.
Suggested Citation
Bacheler, N., Buckel, J., Hightower, J., Paramore, L., and Pollock, K.H., 2009, A combined telemetry - tag return approach to estimate fishing and natural mortality rates of an estuarine fish: Canadian Journal of Fisheries and Aquatic Sciences, v. 66, no. 8, p. 1230-1244, https://doi.org/10.1139/F09-076.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | A combined telemetry - tag return approach to estimate fishing and natural mortality rates of an estuarine fish |
| Series title | Canadian Journal of Fisheries and Aquatic Sciences |
| DOI | 10.1139/F09-076 |
| Volume | 66 |
| Issue | 8 |
| Year Published | 2009 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Canadian Journal of Fisheries and Aquatic Sciences |
| First page | 1230 |
| Last page | 1244 |