Subject
- Chinook salmon4
- Coho salmon3
- Aquaculture2
- Caspian tern -- Ecology -- Columbia River Estuary (Or. and Wash.)2
- Caspian tern -- Food -- Columbia River Estuary (Or. and Wash.)2
- Double-crested cormorant -- Ecology -- Columbia River Estuary (Or. and Wash.)2
- Double-crested cormorant -- Food -- Columbia River Estuary (Or. and Wash.)2
- Marine ecology -- Oregon2
- Salmonidae2
- Stream ecology2
- Abalone culture1
- Abalones -- Feeding and feeds1
- Agricultural wastes -- Environmental aspects -- California -- Tulare Lake1
- Algae as feed1
- Algae culture1
- Amazon parrots -- Conservation -- Guatemala1
- Amazon parrots -- Guatemala -- Geographical distribution1
- Amazon parrots -- Migration -- Guatemala1
- American avocet -- Abnormalities -- California -- Tulare Lake1
- American avocet -- California -- Tulare Lake -- Mortality1