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Fish Species and Life Stages of Primary Management Concern <br /> Evaluating potential water quality-related impacts to fish resources requires an understanding of fish species' life <br /> histories and life stage-specific environmental requirements. Therefore,this information is provided below for <br /> fish species of primary management concern that occur within the lower San Joaquin River and Delta. Species of <br /> primary management concern include special-status species likely to occur in the potentially affected portions of <br /> the San Joaquin River and Delta(e.g., Chinook salmon, steelhead, green sturgeon, delta smelt, Sacramento <br /> splittail,hardhead)and those species that are recreationally and/or commercially important(e.g., Chinook salmon, <br /> steelhead, striped bass). <br /> Because these species collectively represent a diversity of life histories and environmental requirements, and <br /> because they are among the most sensitive to environmental perturbation,the findings from assessments made for <br /> these species can be effectively used to make inferences to other fish species using the lower San Joaquin River <br /> and Delta. Species of primary management concern with the greatest potential to be affected by increased effluent <br /> discharges under the proposed project are discussed below. Because effluent discharges are often higher in <br /> temperature that background ambient water temperatures,particular attention is focused on species/life stage <br /> thermal tolerances. The seasonal timing of significant life stages for these species in the project vicinity is <br /> presented in Table 4.13-3. <br /> Table 4.13-3 <br /> Life History and Distributions of Evaluation Fish Life Stages in the <br /> Lower San Joaquin River and South Delta <br /> Life Stage/Location Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec <br /> Fall-run chinook salmon <br /> Adult Migration <br /> Rearing/Emigration <br /> Steelhead <br /> Adult Migration <br /> Rearing/Emigration 06 <br /> Green sturgeon <br /> Adult Migration <br /> Rearing/Emigration <br /> Delta smelt <br /> Adult Foraging and Spawning <br /> Larvae and Juvenile Rearing <br /> Sacramento splittail <br /> Adult Foraging and Spawning <br /> Larvae and Juvenile Rearing or <br /> Hardhead <br /> Adult Foraging and Spawning wy� <br /> Larvae and Juvenile Rearing <br /> Striped bass <br /> Adult Foraging and Spawning MMMMOV <br /> Larvae and Juvenile Rearing <br /> ■ period of potential occurrence <br /> Source:Moyle 2002;NMFS 2005 <br /> Manteca WQCF and Collection System Master Plans EIR EDAW <br /> City of Manteca 4.13-5 Fisheries and Aquatic Resources <br />