Filling knowledge gaps for a threatened species: Age and growth of Green Sturgeon of the southern distinct population segment
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Abstract
The Green Sturgeon Acipenser medirostris is an anadromous, long-lived species that is distributed along the Pacific coast of North America. Green Sturgeon is vulnerable to global change because of its sensitive life history (e.g., delayed maturation) and few spawning locations. The persistence of Green Sturgeon is threatened by habitat modification, altered flows, and rising river temperatures. In 2006, because of persistent stressors, the U.S. Endangered Species Act listed the southern distinct population segment as threatened. Despite increased research efforts on this species after the listing, substantial gaps in basic population information for Green Sturgeon remain. We present the only published information on age structure and growth of a threatened population of Green Sturgeon. By analyzing archived fin rays collected from 1984 to 2016, we revealed highly variable growth among individuals. We detected several age classes from 0 to 26 y and found similar growth rates of southern distinct population segment Green Sturgeon compared with northern population Green Sturgeon. Although limited, this analysis is an important first step to understanding Green Sturgeon population dynamics and highlights critical research needs.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Filling knowledge gaps for a threatened species: Age and growth of Green Sturgeon of the southern distinct population segment |
| Series title | Journal of Fish and Wildlife Management |
| DOI | 10.3996/JFWM-20-073 |
| Volume | 12 |
| Issue | 1 |
| Year Published | 2021 |
| Language | English |
| Publisher | U.S. Fish and Wildlife Service |
| Contributing office(s) | Coop Res Unit Seattle |
| Description | 7 p. |
| First page | 234 |
| Last page | 240 |
| Country | United States |
| State | California, Oregon, Washington |
| Google Analytic Metrics | Metrics page |