Time spent fishing is the effort metric often studied in fisheries but it may under-represent the effort actually expended by fishers. Entire fishing trips, from the time vessels leave port until they return, may prove more useful for examining trends in fleet dynamics, fisher behavior, and fishing costs. However, such trip information is often difficult to resolve. We identified ~30,000 trips ...

In June and July 2000, Otsego Lake was stocked with 80,000 Oneida Lake strain pond fingerling walleye (Stizostidion vitreum) averaging 48mm in total length (TL) (range= 32-56mm) with the primary goal ofre-establishing walleye to the lake. The yearly stocking ofthis number of walleye will continue to at least 2003. It is expected that walleye will forage primarily upon alewives (Alosa pseudohare...

Walleye discrete epidermal hyperplasia (WEH) is a hyperproliferative skin disease that is prevalent on adult walleye fish throughout North America. We have identified two retroviruses associated with WEH, designated here as walleye epidermal hyperplasia virus type 1 and type 2 (WEHV1 and WEHV2), that are closely related to one another (77% identity) and to walleye dermal sarcoma virus (64% iden...

The First Nations communities of Grassy Narrows and Wabaseemong (Ontario, Canada) have been impacted by mercury pollution since the 1960s. This study was implemented with the objective of providing these communities with information on current mercury concentrations in their catch, in order to make appropriate fish consumption choices. A total of 851 fish samples, including Walleye, Northern Pi...

Stock assessment model was so called effort-controlled version of the ISVPA-group of separable cohort models (for details of the model see appendix and references to it). This version of the model attributes residuals in cohort part of the model to errors in catch-at-age data, assuming that selection pattern (patterns) is stable. This version is often more robust for noisy catch-at-age data. Ad...

Mean whole energy content (Ewb) of age 0 year walleye pollock Theragra chalcogramma was 19·928 KJ g 1 dry mass in 3943 fish collected from different habitats around the Pribilof Islands frontal structure, south-east Bering Sea, during September 1994–1996 and 1999. It varied, however, with habitat type. Fish residing offshore had higher Ewb than fish residing inshore of the frontal regions. Age ...

Fish migration in large freshwater lacustrine systems such as the Laurentian Great Lakes is not well understood. The walleye (Sander vitreus) is an economically and ecologically important native fish species throughout the Great Lakes. In Lake Huron walleye has recently undergone a population expansion as a result of recovery of the primary stock, stemming from changing food web dynamics. Durin...

The risk of mercury (Hg) exposure to humans and wildlife from fish consumption has driven extensive mercury analysis throughout the Great Lakes Region since the 1970s. This study compiled fish-Hg data from multiple sources in the region and assessed spatiotemporal trends of Hg concentrations in two representative top predator fish species. Walleye (Sander vitreus) and largemouth bass (Micropter...

uate walleye stocking success. North American Journal of Fisheries Management, 12, 285Ð290. Laarman PW (1978) Case histories of stocking walleyes in inland lakes, impoundments, and the Great Lakes Ð 100 years with walleyes. American Fisheries Society Special Publication, 11, 254Ð260. Miller LM, Kapuscinski AR (1996) Microsatellite DNA markers reveal new levels of genetic variation in northern p...