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Abstract The purpose in seeking Traditional Ecological Knowledge (TEK) of Pacific lamprey from tribal members within the Confederated Tribes of the Umatilla Indian Reservation was to gain additional natural history insights and baseline life history information for a poorly understood species. Tribal members described harvesting two types of lamprey from spring through fall, the short brown type and the long dark type. Lamprey spawning distribution was from the mouth to the headwaters in the Umatilla River. Larval lampreys were observed in the mud and sand areas of the mainstem Umatilla and Columbia rivers. Tribal members observed a major decline in numbers of lamprey within the Columbia River basin.
Abstract.—Information on movement patterns and behaviors of Pacific lampreys Lampetra tridentata at Columbia River hydroelectric projects is needed to determine effects of the dams on survival. Radiotelemetry provides a good method for gaining knowledge about Pacific lamprey behavior at the dams; however, one of the assumptions of a radiotelemetry experiment is that tagged individuals are representative of untagged individuals. Therefore, we undertook an assessment of the swimming performance and physiological effects of surgical implantation of radio transmitters into the peritoneal cavities of Pacific lamprey. We measured concentrations of plasma glucose, ventilation rate, and swimming performance at short-term...
Efforts to manage the invasive sea lamprey Petromyzon marinus in the Great Lakes have greatly reduced the species’ abundance and distribution. The methods employed have also affected the abundance and distribution of species that are native to the Great Lakes basin, including the American brook lamprey Lampetra appendix (also known as Lethenteron appendix), the northern brook lamprey Ichthyomyzon fossor, and the silver lamprey I. unicuspis. Discrimination among the four species based on the phenotypic characteristics of larvae is difficult, making accurate assessments of their abundance, recruitment, and distribution within streams problematic. Given growing interest in the conservation of native species and the...
FOREWORD The abundance and distribution of Pacific lamprey (Entosphenus tridentatus, formerly Lampetra tridentata) has significantly declined throughout its range over the past three decades. Many factors have contributed to this decline, including: impeded passage at dams and diversions, altered management of water flows and dewatering of stream reaches, dredging, chemical poisoning, poor ocean conditions, degraded water quality, disease, over-utilization, introduction and the establishment of non-native fishes, predation, and stream and floodplain degradation (Luzier et al 2009). Mitigation and restoration actions focused on habitat restoration of salmonid species within tributary habitats may also have contributed...
See the documents “Pacific Lamprey Entosphenus tridentatus Assessment 2018” (https://www.sciencebase.gov/catalog/item/53b04dade4b0616e8bce5217) for complete information. These data were the results of the assessment and were used to create the maps found in the documents. NatureServe and its member programs and collaborators use a suite of factors to assess the extinction or extirpation (regional extinction) risk of plants, animals, and ecosystems (or “elements” of biodiversity). By researching and recording information on a set of factors, biologists can assign a conservation rank to these elements at both global and regional (i.e., national/subnational) scales. The protocol for assigning a conservation rank...
Categories: Data;
Types: ArcGIS REST Map Service,
ArcGIS Service Definition,
Downloadable,
Map Service;
Tags: NatureServe Assessment,
Pacific Lamprey
Abstract.—Age structures of several populations of parasitic and nonparasitic lampreys were estimated from statolith band number and length-frequency distributions. In larval populations of the parasitic sea lamprey Petromyzon marinus and nonparasitic American brook lamprey Lampetra appendix, which display strong seasonal patterns of growth, one narrow dark band or annulus and one broad opaque band was produced each winter and summer, respectively. The formation of an annulus during slow growth was validated in two populations of sea lampreys with a chemical tissue marker, oxytetracycline. Length-frequency distributions required large samples to identify age groups, and the older age groups within a population were...
This study used large laboratory mazes and natural stream waters to test the role of olfactory cues, including a pheromone released by larvae, in spawning stream localization by migratory sea lamprey (Petromyzon marinus). We found that migratory lamprey strongly prefer stream water over lake water and that this response is dependent upon a functional olfactory system. Responses persisted among migratory lamprey even after stream water was diluted a thousand times but were not seen among non-migratory lamprey. Experiments using waters from five streams demonstrated that a larval pheromone is a key determinant of stream attractiveness: water from streams with larval populations were consistently more attractive than...
The discovery that macroorganisms can be detected from their environmental DNA (eDNA) in aquatic systems has immense potential for the conservation of biological diversity. This special issue contains 11 papers that review and advance the field of eDNA detection of vertebrates and other macroorganisms, including studies of eDNA production, transport, and degradation; sample collection and processing to maximize detection rates; and applications of eDNA for conservation using citizen scientists. This body of work is an important contribution to the ongoing efforts to take eDNA detection of macroorganisms from technical breakthrough to established, reliable method that can be used in survey, monitoring, and research...
Figure 1. Oil and gas development exposure and conservation scenarios for Greater sage-grouse: Combining spatially explicit modeling with GIS visualization provides critical information for management decisions. 2017. Applied Geograpy Lara M. Juliusson and Kevin E. Doherty
Categories: Data;
Types: ArcGIS Map Package,
Downloadable;
Tags: Greater sage-grouse,
Oil and Gas,
USGS Assessments
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