an in situ, individual-based approach to quantify connectivity of marine fish ontogenetic movements and residency of lingcod原位,基于单独的方法量化连接海洋鱼类个体发生的动作和居住的大鱼.pdfVIP

An In Situ, Individual-Based Approach to Quantify Connectivity of Marine Fish: Ontogenetic Movements and Residency of Lingcod 1 1 2 Mary Anne Bishop *, Brad F. Reynolds , Sean P. Powers 1 Prince William Sound Science Center, Cordova, Alaska, United States of America, 2 Dauphin Island Sea Lab, Department of Marine Sciences, University of South Alabama and Center for Ecosystem Based Fisheries Management, Dauphin Island, Alabama, United States of America Abstract As modern fishery assessments change in an effort to be more accurate and encompass the range of potential ecosystem interactions, critical information on the ecology of species including life history, intra and inter-specific competitive interactions and habitat requirements must be added to the standard fishery-dependent and independent data sets. One species whose movements and habitat associations greatly affects exploitation patterns is lingcod, Ophiodon elongatus, which support an economically important fishery along the coastal waters of the Pacific Coast of North America. High site fidelity and limited movements within nearshore areas are hypothesized to have resulted in high catchability, a major factor that has contributed to overfished stocks. Thus, assessing the level of movement and connectivity among lingcod subpopulations inhabiting nearshore habitats is a prerequisite to determining the condition of lingcod stocks. We used the Pacific Ocean Shelf Tracking (POST) Project acoustic receiver array in Alaska’s Prince William Sound to monitor movements and residency of 21 acoustic-tagged lingcod for up to 16 months. Eight of sixteen lingcod (50%) initially aged at 2.5- to 3.5- years-old dispersed from their tag site. Dispersal was highly