Showing papers by "Nicholls State University published in 1972"

Infection of Brown Shrimp, Penaeus aztecus Ives by Prochristianella penaei Kruse (Cestoda:Trypanorhyncha) in Southeastern Louisiana Bays

Abstract: The plerocercus of the trypanorhynchan cestode, Prochristianella penaei was found to be a common parasite of commercially important shrimp (Penaeus aztecus and P. setiferus) in southeastern Louisiana. During June and July 1967, the cestode was found in 42% of 971 subadult and large juvenile P. aztecus taken weekly from different estuaries. Infection of specimens from Lake Pontchartrain varied between 18% and 50% without a definite pattern, but in Lake Borgne it rose suddenly from 38% to 88% and leveled off. In the delta complex west of the Mississippi River, it increased at a slower but more regular rate and reached a maximum of 63% in the last sampling week. Prochristianella penaei was found in 75% of 150 Penaeus setiferus obtained from Lakes Pontchartrain and Borgne on two successive weeks (July 24 to August 3) following a sharp decline in the availability of P. aztecus. Infection patterns of both species are discussed relative to the ecology of sampled areas and habits of hosts involved in the...