Attributes / relations provided by
♦ ¹Food web topology and parasites in the pelagic zone of a subarctic lake, Per-Arne Amundsen, Kevin D. Lafferty, Rune Knudsen, Raul Primicerio, Anders Klemetsen and Armand M. Kuris, Journal of Animal Ecology 2009, 78, 563–572
♦ ²FOOD OF THE SQUAWFISH Ptychocheilus oregonensis (Richardson) OF THE LOWER COLUMBIA RIVER, RICHARD B. THOMPSON, FISHERY BULLETIN 158 (1959)