An evaluation of multiple-pass seining to monitor blackstripe topminnow Fundulus notatus (Rafinesque, 1820) in the Sydenham River (Ontario, Canada)
Version of Record online: 4 APR 2014
© Her Majesty the Queen in Right of Canada 2014. Reproduced with the permission of the Minister of Natural Resources.
Journal of Applied Ichthyology
Volume 30, Issue 5, pages 962–969, October 2014
How to Cite
Reid, S. M. and Hogg, S. (2014), An evaluation of multiple-pass seining to monitor blackstripe topminnow Fundulus notatus (Rafinesque, 1820) in the Sydenham River (Ontario, Canada). Journal of Applied Ichthyology, 30: 962–969. doi: 10.1111/jai.12447
- Issue online: 11 SEP 2014
- Version of Record online: 4 APR 2014
- Manuscript Accepted: 29 DEC 2013
- Manuscript Received: 12 NOV 2013
- Provincial and Federal Species at Risk Program Funds
Multiple-pass (i.e. removal) sampling and mark-recapture experiments were undertaken in the Sydenham River (Ontario, Canada) to assess the effectiveness of seining to detect and estimate the local abundance of blackstripe topminnow, Fundulus notatus (Rafinesque, 1820) as well as to compare catch characteristics from closed and open (with and without block nets) sample units. Probability of species detection using three-pass seining was estimated to be 0.58 in closed units, and 0.51 in open units. To be 95% confident of occupancy status, a minimum of five repeat surveys is required. A decline in catch occurred in only half of the sample units, population size estimates were often imprecise, and attempts to generate mark-recapture population estimates were unsuccessful. Mean capture probabilities were 0.48 in closed units and 0.65 in open units, when depletion occurred. For blackstripe topminnow and other fishes encountered, there were no significant differences between closed and open units in the frequency of depletion or capture probability. Compared to single-pass surveys, monitoring programs that employ three seine hauls are more likely to detect the presence of the blackstripe topminnow and any decline in local abundance.