approved: Signature redacted for privacy. Dr5. L. }yer The purpose of this study was to characterize Cytophaga psychrophila isolates obtained from coho fingerlings with low temperature disease collected at selected hatcheries in Oregon. In addition, cultures thought to be related to this bacterium were isolated from Siletz Hatchery water, deformed juvenile and spawning adult coho salmon, rainbo...

During the period from August 1997 to March 1998, two thousand samples of cultured Penaeus semisulcatus postlarvae and subadults were collected from five hatcheries and 20 growout farms distributed in three provinces along the costs of Persian Gulf and the Oman Sea. Based on growth signs, LM and TEM histopathology, Hepatopancreatic Parvo-like Virus (HPV) were identified from the samples. The HP...

this study aimed to identify the causative of the mass mortality observed in zoeal to post-larval shrimp raised in hatcheries in south iran. for three consecutive months, samples of nauplii and zoea of litopenaeus vannamei were collected from an affected hatchery located in the province of bushehr. upon culture on marine agar, bacterial colonies that produced white, orange, yellow and red pigme...

INTRODUCTION The sturgeons of the Caspian Sea are considered highly valuable species. The Caspian Sea has traditionally been regarded as the sea of sturgeon since it produces more than 90 percent of the world’s caviar. Despite a remarkable decline of sturgeon numbers over recent years, the Caspian Sea still continues to be of considerable importance in sturgeon fisheries. In 1997, the global la...

The presence of salmonellae in fertile broiler hatching eggs has been clearly identified as a critical control point in the salmonellae contamination of broiler chickens. This paper reviews the published research studies on a) the penetration and proliferation of salmonellae in hatching eggs, b) the consequences of this contamination on the contamination of the final product, and c) the egg's d...

Background(s) and Objective(s) In mammals and birds, sex is dictated by the chromosomal constitution and is thus genetic (mammalian males are XY and females are XX). However, many fi shes have environmental sex determination without sex chromosomes. Their sex is determined by egg incubation temperature or by social status. The objective of this project was to evaluate the working hypothesis tha...