scholarly journals Transmission of white sturgeon iridovirus in Kootenai River white sturgeon Acipenser transmontanus

2006 ◽  
Vol 70 ◽  
pp. 37-45 ◽  
Author(s):  
JD Drennan ◽  
SE LaPatra ◽  
JT Siple ◽  
S Ireland ◽  
KD Cain
Keyword(s):  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
White Sturgeon Iridovirus ◽  
Kootenai River

High-density rearing of white sturgeon Acipenser transmontanus (Richardson) induces white sturgeon iridovirus disease among asymptomatic carriers

2005 ◽  
Vol 36 (8) ◽  
pp. 824-827 ◽  
Author(s):  
John D Drennan ◽  
Sue Ireland ◽  
Scott E LaPatra ◽  
Leslie Grabowski ◽  
Tarita K. Carrothers ◽  
...  
Keyword(s):  
High Density ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Asymptomatic Carriers ◽  
White Sturgeon Iridovirus

Evidence of density- and size-dependent mortality in hatchery-reared juvenile white sturgeon (Acipenser transmontanus) in the Kootenai River

2009 ◽  
Vol 66 (5) ◽  
pp. 802-815 ◽  
Author(s):  
Casey Justice ◽  
Brian J. Pyper ◽  
Raymond C.P. Beamesderfer ◽  
Vaughn L. Paragamian ◽  
Pete J. Rust ◽  
...  
Keyword(s):  
Survival Rates ◽  
Negative Relationship ◽  
Fork Length ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
First Year ◽  
Small Fish ◽  
Size Dependent ◽  
Kootenai River ◽  
Dependent Mortality

We evaluated effects of stocking level and size-at-release on survival rates of hatchery-reared juvenile white sturgeon ( Acipenser transmontanus ) in the Kootenai River using Cormack–Jolly–Seber and related models implemented in Program MARK. A total of 119 768 marked and unmarked hatchery juveniles were released from 1992 to 2006, of which 2938 passive integrated transponder (PIT)-tagged fish were subsequently recaptured. Annual survival rates of marked groups ranged from 0.01 to 0.84 (mean = 0.45) during the first year at large, from 0.48 to 1.0 (mean = 0.84) in the second year, and averaged 1.0 during all subsequent years. First year survival rates declined substantially in recent years, particularly for small fish (<25 cm fork length). Approximately 59% of the variation in first year survival was explained by a negative relationship with estimated juvenile abundance (linear regression, P < 0.01). Length-at-release of individuals explained a substantial proportion of the within-year variation in survival during the first year at large. Our results provide strong evidence of density- and size-dependent mortality in hatchery-reared juvenile white sturgeon in the Kootenai River. Management actions that prioritize the release of fewer, larger-sized fish will likely improve first year survival rates and subsequent recruitment to the spawning-age population.

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