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&a1ag,m1 au1 Fnhene,Reirmrce,Fix+laalim m d Werlarn!Dehrreanon Repair Weber Pomr S=1hbmk Seo» 11 Protect City nfStockrm CA only in the Sacramento and Klamath rivers (Moyle, et al, 1995) See Section VII of this document for additional discussion � Pacific lamprey (Lampetra tridentate) HABITAT AND BIOLOGY, An anadromous lamprey species that attaches t0 the back of a host ' fish with an oral disc and feeds on muscle tissue as an adult Pacific lamprey spend the predatory phase of their life in the ocean (one to two years) and then migrate up into freshwater streams to spawn This species spawns in clean, gravelly riffles in permanent streams where the current is not too swift(Moyle, 1976) Ammocoetes (sexually immature lamprey) move downstream from the spawning area and bury themselves in suitable areas of soft sand or mud (Moyle, 1976, and McGinnis, 1984) The ammocoetes are filter feeders for the five to seven years of larval life(McGinnis, 1984) After metamorphose, they move ' downstream to the sea or estuary to begin the adult, predatory phase of their life (McGinnis, 1984) RANGE* Found in most Pacific coast streams from Alaska down to the Santa Ana River, ' although large spawning runs are rare south of Monterey Bay (Moyle, 1976) Pacific lamprey move considerable distances up rivers to spawn, stopped only by major barriers such as Friant Dam on the San Joaquin River(Moyle, 1976) ' CNDDBI RAREFIND RECORDS There are no records for this species in the Stockton West quadrangle HABITAT PRESENT ON-SITE?' Marginal This species spends the adult, predatory phase of Its life cycle in the ocean This species could periodically occur in Stockton Channel adjacent to ' the project study area as it migrates upstream to find suitable spawning habitat There is no spawning habitat in Stockton Channel adjacent to the project study area due the lack of clean, gravelly riffles There Is no habitat for ammocoetes within the study area due to the lack of soft sand or mud See Section VII of this document for additional discussion River lamprey (Lampetra ayresr') ' HABITAT AND BIOLOGY A small predaceous fish that attaches to the back of a host fish with an oral disc and feeds on muscle tissue Occurs in rivers and large coastal streams This species spawn in clean, gravelly riffles in permanent streams While in fresh water, adults spend most of their time in the lower reaches of large streams(Moyle, 1976) Ammocoetes ' (sexually immature lamprey) require sandy backwaters or stream edges in which to bury themselves(Moyle et at, 1995) RANGE In California, this species has been recorded from the lower Sacramento and San Joaquin nvers and from the Russian River A landlocked population may exist in upper Sonoma Creek(Moyle et at, 1995) CNDDB/RAREFIND RECORDS There are no records for this species in the Stockton West ' quadrangle HABITAT PRESENT ON-SITE?. Marginal This species could periodically occur in Stockton Channel adjacent to the project study area as adults forage for suitable prey There is no spawning habitat In Stockton Channel adjacent to the project study area due the lack of clean, ' gravelly riffles See Section VII of this document for additional discussion Sacramento splittall(Pogonrchthys macroleprdotus) HABITAT AND BIOLOGY A minnow of the backwater slough areas with a preference for low I ' salinity, shallow-water habitat(Moyle, et al, 1995) Spawning requirements include shoreline vegetation or gravel in creek tributaries of large rivers during spnng high water levels (McGinnis, 1984) RANGE Now largely confined to the Delta, Suisun Bay, Suisun Marsh, Napa River, Petaluma River, and other parts of the Sacramento-San Joaquin estuary (59 FR 862) SEA 8104 DOC 9118197 Sycamore Environmental Consultants Inc 8 i