Fisheries and Aquaculture Journal
Open Access
ISSN: 2150-3508
+44 1478 350008
ISSN: 2150-3508
+44 1478 350008
Department of Okanagan Nation Alliance, West Bank, Canada
Dr. Richard Bussanich is a Professional Biologist (BC), with over fifteen years experience as a fisheries biologist leading and supporting fisheries management/ecology, stock assessment, freshwater monitoring, fish habitat inventory and restoration, and fish reintroduction programs (enhancement). His experience working on large rivers and lakes, from California to Alaska, and diversity of skills including: business development, ecosystem valuation, plus community development projects in urban and rural environments has been valued by the programs, people and places he have served.
Research Article
Maximum Likelihood Estimation of Kokanee and Sockeye Salmon Spawners in a Stream Using Visual Survey Data, 2003-2017
Author(s): Marc Labelle, Richard Bussanich* and Ryan Benson
A Maximum Likelihood estimation procedure was developed for the joint assessment of resident kokanee and anadromous
sockeye salmon in the Okanagan River, British Columbia. The model uses visual survey counts and is an extension of other areaunder-
the type models used for estimation of salmon escapement. Alternative hypotheses were tried concerning observation error
structure, arrival times, and survival patterns for a common observer efficiency estimate. The final model is described here, with
information on setting bounds and constraints for parameter estimation, comparisons made and the results obtained. Estimates
of abundance and approximate confidence intervals are comparable to those obtained from other investigations. Since 2001,
Sockeye accounted from 6%-38% of the spawners, with no evidence from surveys and estimates to indicate kokanee are negatively
im.. View More»
DOI:
10.35248/2150-3508.21.12.277