• Alaska Department of Fish and Game Reports

      Alaska Department of Fish and Game, 1964-12
      Reports from various Divisions within Alaska Department of Fish and Game
    • Equitable co-management on the Kuskokwim River

      McDevitt, Chris; Anahita, Sine; Ehrlander, Mary; Racina, Kris (2018-08)
      A legally empowered equitable co-management system of the Kuskokwim River salmon fishery between subsistence users and state and federal managers does not exist. Despite federal legislation Alaska National Interest Lands Conservation Act (ANILCA) (Section 8) calling for a "meaningful role" for subsistence users in managing fish and game on federal lands, some rural subsistence users believe that they have yet to assume a "meaningful role" in the policy-making process. The absolute maximum capacity that subsistence users can fulfill in terms of participating in the management of the resources they depend on comes in the form of one of many advisory boards. Ultimately, management regimes and policymakers do not have to consider advisory council member recommendations, suggestions and/or group proposals. On the Kuskokwim River, the decline of king salmon, perceived mismanagement, general mistrust of management agencies, inter-river conflict, and lack of authority and accountability felt by local users, has prompted some subsistence salmon fishermen to press for a stronger role in salmon management. The United States Fish and Wildlife Service (USFWS) and the Kuskokwim River Inter Tribal Fish Commission (KRITFC) have developed a Memorandum of Understanding (MOU) pertaining to the management of the fishery. The Alaska Department of Fish and Game (ADFG) has not entered into negotiations with the KRITFC and United States Fish and Wildlife Service (USFWS) regarding management. This thesis explores the history of the Kuskokwim salmon fishery and options available to Alaska Native subsistence salmon users who seek an equitable role in managing the fishery.
    • The feeding ecology of chum salmon fry (Oncorhynchus keta) in northern Prince William Sound, Alaska

      Massa, James Richard (1995-05)
      A two year study of the feeding ecology of early outmigrating chum salmon fry, Oncorhynchus keta, in northern Prince William Sound, Alaska, demonstrated harpacticoid copepods and chironomid insects to be dominant food taxa with calanoid copepods, polychaete larvae, cladocerans and cirripeds also contributing. Examination of the IRI (Index of Relative Importance) values for harpacticoids and insects revealed fluctuating seasonal patterns. Low IRI values for harpacticoids and/or insects coincided with higher IRI values for calanoids, polychaetes, cladocerans and cirripeds. ANOVA analyses and t-tests results on stomach contents demonstrated spatiotemporal variations in diet. Early outmigrating chum fry inhabited tidal mudflats, rocky beaches and vertical rocky outcrops where harpacticoids and insects were prevalent. CTD data and plankton tows indicated that tidal advection supplied pelagic prey from Unakwik Inlet to Jonah Bay. Fluctuating IRI values by prey taxa suggest an opportunistic rather than selective feeding behavior for chum fry based on prey availability.
    • Juvenile Fish Passage Through Culverts in Alaska: A Field Study

      Kane, Douglas L.; Belke, Charles E.; Gieck, Robert E.; Mclean, Robert F. (2000-06)
      In the past, culvert design where fish passage was considered generally has been based on the weakest-swimming adult fish in a river system. It has also been recognized for some time that juvenile fish are very active throughout the year, moving upstream and downstream in response to a number of environmental factors. In Alaska, many natal and nonnatal streams in southcentral and southeastern Alaska support both Chinook (Oncorhynchus tschawytscha (Walbaum)) and Coho (Oncorhynchus kisutch (Walbaum)) for one to three years, respectively, before they emigrate to sea. Are we restricting desirable habitat for these juvenile salmonids with hydraulic structures such as culverts? Unfortunately we have little information on either the behavior of juveniles in the vicinity of hydraulic structures or their swimming abilities. The objective of this study was to examine the behavior of juveniles when attempting to ascend a culvert. It was hypothesized that vertical obstacles or high velocity of opposing flow may prevent juvenile fish from moving upstream. It was also hypothesized that they would determine and take the path of least resistance to optimize their chances of successfully ascending a culvert. Four culverts were selected for intensive study regarding juvenile fish passage: Beaver and Soldotna Creeks on Kenai Peninsula and No-name and Pass Creek Tributary on Prince of Wales Island. It was postulated that fish are motivated to move upstream to obtain food if they can establish its presence. We used salmon eggs as an attractive food source both to initially capture the juveniles and then to motivate them to ascend the culvert for possible recapture. Juvenile fish were captured in a baited minnow trap and stained with a dye. They were released downstream of the culvert while the food source was placed upstream in a minnow trap. We supplemented our visual observations with underwater video cameras. We made numerous hydrologic and hydraulic measurements at each site. Although we attempted to select culverts that would prove to be quite challenging to juvenile fish passage, in three of the culverts selected, juvenile fish, of the full range of the fork length initially captured, succeeded in ascending through the culvert. For the fourth culvert, some larger juvenile fish succeeded in ascending the culvert, but not the smaller of each fish type. It was clearly established that juvenile fish were motivated to move upstream to obtain food. In the Beaver Creek culvert, fish used the large corrugations to their advantage when ascending the culverts. The Pass Creek Tributary culvert had corrugations too small for fish to utilize. No-name Creek appeared to present not problems for juvenile fish for the water levels at the time of the visit as they small along the bottom on the centerline of the culvert. In general, observations of fish attempting to move upstream through the culvert revealed that they swam very close to the culvert wall, and in the case of high velocities (Beaver Creek and Pass Creed Tributary) they swam near the surface along the sidewall where velocities are reduced. It is obvious that the juvenile fish are attempting to minimize power output and energy expenditure by taking the path of least resistance. Although not quantitavely proven, it appears that as long as fish make some headway in their upstream movement they are content. The rationale for this conclusion is that fish do not know what they may encounter upstream so they attempt to conserve as much power and energy as possible while still moving forward. They generally do so by seeking out the lowest velocities in the cross-section. In areas of steep velocity gradients along the wall (where the areal extent of low velocities is limited), it is clear in our videotapes that fish have problems maintaining their position and preferred orientation. It is apparent from our observations that because of their small size, juvenile fish are hindered by turbulence and that this area needs more study.