Jay V. Huner

Aquatic invertebrate fauna and crawfish (Procambarus spp.) stomachs were sampled monthly (October 1981-April 1982) in a crawfish pond dominated by rice (Oryza sativa). Invertebrate fauna only was sampled during the same period in a nearby pond dominated by alligator weed (Alternanthera philoxeroides), a perennial, semi-aquatic forb. Macroinvertebrates were affected by the gradual disappearance of rice stubble in the rice pond. Clinging insects such as dragonfly naiads and mayfly nymphs were abundant when vegetation was present but were replaced by small, bottom dwelling crustaceans (...

Weekly samples of river shrimp (Macrobrachium ohione) were collected from the commercial bait fishery located at Port Allen, Louisiana. Mean size was 30.6 ± 0.2 mm (total length) (n = 7,058); the mode was 27 mm (n = 851); and the range was 17-92 mm. Mean size declined from approximately 39 mm in early March (when fishing began) to approximately 28 mm in mid-August (when fishing ended). The mean size of ovigerous females was 66.1 ± 1.7 mm (n = 88); and the range was 27-92 mm. Bopyrid parasitization is discussed. A comparison is made with data collected from the same area in the early 1930's...