منابع مشابه
Diel and seasonal movements by adult Sacramento pikeminnow (Ptychocheilus grandis) in the Eel River, northwestern California
In late summer and fall, radio-tagged adult Sacramento pikeminnow (Ptychocheilus grandis) at three sites in the Eel River of northwestern California moved more at night than during the day. Fish moved up to 535 m at night and returned to their original positions the following morning. Adult Sacramento pikeminnow at all sites occupied only pools during the day, but at one site moved through high...
متن کاملSpatial, Seasonal, and Size-dependent Variation in the Diet of Sacramento Pikeminnow in the Eel River, Northwestern California
Weexamined the food habits of 2,077 Sacramento pikeminnow (46550 mm standard length [SL]) collected from the mainstem Eel River and South Fork Eel River, California in 1995-1997. Fifty-eight percentofthe fish contained prey in the upperdigestive tract. Sacramento pikeminnow consumed awidevarietvof orev: thediversitvofindividualdiets was hiaher from~ebruary-~aycoipa;edid~uly-~ctoderand higherint...
متن کاملHabitat Relationships and Larval Drift of Native and Nonindigenous Fishes in Neighboring Tributaries of a Coastal California River
— Motivated by a particular interest in the distribution of the nonindigenous, piscivorous Sacramento pikeminnow Ptychocheilus grandis, we examined fish–habitat relationships in small tributaries (draining 20–200 km2) in the Eel River drainage of northwestern California. We sampled juvenile and adult fish in 15 tributaries in both the summer and fall of 1995 and attempted to relate the densitie...
متن کاملEffects of an introduced piscivorous fish on native benthic fishes in a coastal river
1. We used field surveys to compare the density and mesohabitat-scale distribution of the native coastrange sculpin (Cottus aleuticus) and the prickly sculpin (C. asper) in coastal rivers in north-western California, U.S.A., with and without an introduced piscivorous fish, the Sacramento pikeminnow, Ptychocheilus grandis. We also measured mortality of tethered prickly sculpin in a field experim...
متن کاملShallow-Water Piscivore-Prey Dynamics in California's Sacramento-San Joaquin Delta
Predation is one mechanism that could lead to low native fish abundance in macrophyte dominated shallow-water habitats in the Sacramento-San Joaquin Delta. We used beach seine and gill net sampling to identify and compare the distribution and feeding ecology of three piscivores (striped bass, Morone saxatilis, largemouth bass, Micropterus salmoides, and Sacramento pikeminnow, Ptychocheilus gran...
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ژورنال
عنوان ژورنال: Journal of Fish and Wildlife Management
سال: 2020
ISSN: 1944-687X
DOI: 10.3996/jfwm-20-038