The Metamorphosis of Visual Systems in the Sea Lamprey

GREAT LAKES FISHERY COMMISSION 2003 Project Completion Report1 Regulation and manipulation of metamorphosis in sea lampreys: the relevance of a sea lamprey obesity factor and brook lamprey life history by:

Concentration of Mercury in Selected Tissues of the Caspian Lamprey (Caspiomyzon wagneri) Migrants in Spawning Season

Background: Mercury (Hg) is considered a global pollutant because Hg0 which is the predominant form of atmospheric Hg resides in the atmosphere for as long as 0.5 to 2 years. Mercury has many negative effects on the reproductive, respiratory, and immune systems. Methods: In this study, 24 Caspian lampreys (Caspiomyzon wagneri) were transported to the university laboratory and then stored in ...

The olfactory system of migratory adult sea lamprey (Petromyzon marinus) is specifically and acutely sensitive to unique bile acids released by conspecific larvae

Larval sea lamprey inhabit freshwater streams and migrate to oceans or lakes to feed after a radical metamorphosis; subsequently, mature adults return to streams to spawn. Previous observations suggested that lamprey utilize the odor of conspecific larvae to select streams for spawning. Here we report biochemical and electrophysiological evidence that this odor is comprised of two unique bile a...

The Sea Lamprey Petromyzon Marinus (l.), River Lamprey Lampetra Fluviatilis (l.) and Brook Lamprey Lampetra Planeri (bloch) in Ireland: General Biology, Ecology, Distribution and Status with Recommendations for Conservation

Three lamprey species occur in Ireland: sea lamprey, Petromyzon marinus (L.), river lamprey, Lampetra fluviatilis (L.) and brook lamprey, Lampetra planeri (Bloch). All three species are listed under Annex II of the EU Habitats Directive (Directive 92/43/EEC), thereby requiring member states to designate Special Areas of Conservation (SACs) for their protection. The juvenile or ammocoete stages ...

Identifying the factors affecting the reduction of Caspian lamprey population (Caspiomyzon wagneri Kessler, 1870) in Shiroud River: The need to adopt management-protection policies

The Caspian lamprey (Caspiomyzon wagneri) is one of the most important ecological and native fish species of the Caspian Sea basin. The present study was conducted to identify the factors affecting the population decline of this species in Shiroud River as one of the important habitats of fish in the southern basin of the Caspian Sea. For this purpose, three stations were selected for sampling ...