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Dispersal and behavior of pacific halibut hippoglossus stenolepis in the bering sea and Aleutian islands region
| Content Provider | Semantic Scholar |
|---|---|
| Author | Seitz, Andrew C. Loher, Timothy Norcross, Brenda L. Nielsen, Jennifer Lorraine |
| Copyright Year | 2011 |
| Abstract | Currently, it is assumed that eastern Pacific halibut Hippoglossus stenolepis belong to a single, fully mixed population extending from California through the Bering Sea, in which adult halibut disperse randomly throughout their range during their lifetime. However, we hypothesize that hali but dispersal is more complex than currently assumed and is not spatially random. To test this hypo thesis, we studied the seasonal dispersal and behavior of Pacific halibut in the Bering Sea and Aleutian Islands (BSAI). Pop-up Archival Transmitting tags attached to halibut (82 to 154 cm fork length) during the summer provided no evidence that individuals moved out of the Bering Sea and Aleutian Islands region into the Gulf of Alaska during the mid-winter spawning season, supporting the concept that this region contains a separate spawning group of adult halibut. There was evidence for geographically localized groups of halibut along the Aleutian Island chain, as all of the individuals tagged there displayed residency, with their movements possibly impeded by tidal currents in the passes between islands. Mid-winter aggregation areas of halibut are assumed to be spawning grounds, of which 2 were previously unidentified and extend the species' presumed spawning range ∼1000 km west and ∼600 km north of the nearest documented spawning area. If there are indeed inde- pendent spawning groups of Pacific halibut in the BSAI, their dynamics may vary sufficiently from those of the Gulf of Alaska, so that specifically accounting for their relative segregation and unique dynamics within the larger population model will be necessary for correctly predicting how these com- ponents may respond to fishing pressure and changing environmental conditions. |
| Starting Page | 225 |
| Ending Page | 239 |
| Page Count | 15 |
| File Format | PDF HTM / HTML |
| DOI | 10.3354/ab00333 |
| Volume Number | 12 |
| Alternate Webpage(s) | http://www.int-res.com/articles/ab_oa/b012p225.pdf |
| Alternate Webpage(s) | https://doi.org/10.3354/ab00333 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
