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Maturation characteristics and life-history strategies of the Pacific lamprey, Entosphenus tridentatus

Creator:

Clemens, Benjamin J., van de Wetering, Stan, Sower, Stacia A., and Schreck, Carl B.

Abstract:

Lampreys (Petromyzontiformes) have persisted over millennia and now suffer a recent decline in abundance. Complex life histories may have factored in their persistence; anthropogenic perturbations in their demise. The complexity of life histories of lampreys is not understood, particularly for the anadromous Pacific lamprey, Entosphenus tridentatus Gairdner, 1836. Our goals...

Resource Type:

Article
Incidence of male intersex in adult Pacific lamprey (Entosphenus tridentatus), with a brief discussion of intersex vs. hermaphroditism in lampreys (Petromyzontiformes)

Creator:

Clemens, Benjamin J., Sower, Stacia A., van de Wetering, Stan, and Schreck, Carl B.

Abstract:

We report the incidence of male intersex in adult Pacific lamprey (Entosphenus tridentatus (Richardson, 1836)) during their pre-spawning migration in fresh water. Although “hermaphrodites” have been suggested in other adult lampreys, this is the first detailed description and discussion of this phenomenon. A total of 0.5% of our adult Pacific...

Resource Type:

Article