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- June 1, 2023
Steelhead trout populations have been declining along Washington State's coast, with limited information about their ocean distribution and movement timing. Steelhead can travel long distances and spawn multiple times, with repeat spawners being more productive. In this study, the authors aimed to understand post-spawn steelhead movements using acoustic telemetry and pop-up satellite tags (PSAT) to determine the location and timing of winter-run steelhead within the Northwest Training and Testing (NWTT) area in 2021. Acoustic telemetry showed that 73.5% of wild fish tagged during their upstream migration died on or near spawning grounds.
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Complete
Small vessel visual surveys in the Mariana Islands Range Complex
Project Objectives
Identify species of beaked whales, odontocetes, and baleen whales that occur in the Mariana Islands; Monitor marine mammal and sea turtle presence, distribution, and diversity in nearshore waters during key seasons (summer and winter); Develop a better understanding of marine mammal distribution, movement patterns, habitat use, population structure, and abundance; Develop reference library of visually-validated acoustic recordings of marine mammals.
Current
Visual Survey and Tagging of Hawaiian Odontocetes
Project Objectives
(1) define the spatial movement and habitat use patterns of species that are exposed to mid-frequency active (MFA) sonar (2) determine how these patterns influence exposure and potential responses
Kaua'i Field Work Updates
February 20, 2025
Scientists from Cascadia Research Collective recently completed a ~9-day field project off Kaua’i that started on February 9th. This project is timed to occur prior to a Submarine Command Course (SCC) training event. The primary goal is to deploy satellite telemetry tags on multiple species of odontocete cetaceans prior to the SCC, to be able to examine their behavior before, during, and after the event. This approach has been very successful in the past as a way of examining how different species respond to Navy training activities including mid-frequency active sonar (MFAS). Click through the picture below to see daily updates.
