Fresh-water biology

Gyrodactylidae et Gyrodactylose des Salmonidae

“…Furthermore. a gênerai infestation (but not gyrodactylosis) was aIso established on "wild fish" in the stream at the farm (WARD et WHIPPLE, 1918: VAN CLEAVE, 1921. "Wild fish' might refer to S. namaycush.…”

Seasonal Specialization and Selectivity of the Eastern Mosquitofish,Gambusia holbrooki, Toward Planktonic Prey

“…Larger cladocerans, for which electivities were mostly positive, were frequently found in the water column. Though Chydorus sphearicus is typically described as littoral (e.g., Pennak 1966, Ward andWhipple 1918), it is reported to consistently leave its substrate (Whiteside et al 1978). In our study, Chydorus were rarely taken in January 2013 when abundant near macrophyte surfaces, but were taken frequently in subsequent months when they became abundant in the water column (Fig.…”

Dynamics of the limnological features and diversity of zooplankton populations of the Cross River System SE Nigeria

“…The numerical assessment of zooplankton was done by Sedgewick-Rafter counting cell. They were identified with the help of a compound microscope using keys given by Ward and Whipple (1959), Mellanby (1963) and Needham and Needham (1972).…”