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Geology topics

G. L. Bullock

Publications and source records attributed to G. L. Bullock.

At least 37 records · Page 2Linked to original sources
USGS1987

Vibriosis in fish

Vvibriosis is a systemic bacterial infection of primarily marine and estuarine fishes, caused by bacteria of the genus Vibrio (Ross et al. 1968, Ghittino et al. 1972); it is a major cause of mortality in maricultur operations. It sometimes also occurs in freshwater species. Vibriosis has been known for centuries; outbreaks were recorded as early as the 1500's along the Italian coast. Terms such as "red pest," "red boil," "red plague," or "saltwater furunculosis" have been applied to vibrio infections, but "vibriosis" is now the specific and standard name of the disease.

Fish Disease Leaflet↗
USGS1986

Effects of five metals on susceptibility of striped bass to Flexibacter columnaris

Exposure of young striped bass Morone saxatilis (weight, 8.5–34 g) to a mixture of arsenic, cadmium, copper, lead, and selenium at 4 and 10 times the average environmental concentrations of 1–3 μg/L protected the fish from experimental infection with Flexibacter columnaris, the causal organism of columnaris disease. In four trials, all striped bass died within 7 d after a 2‐min exposure to 5 × 10 6 F. columnaris cells in untreated water. In contrast, no fish died after a single dayˈs exposure to the metal mixture followed by infection with F. columnaris and a second exposure to the metals for seven more days. When striped bass were exposed 5 d to individual metals, copper protected against infection and cadmium offered marginal protection but was slightly toxic after 2 d exposure. Arsenic increased susceptibility to infection, and lead and selenium were without an apparent effect.

Transactions of the American Fisheries Society↗
USGS1986

Pathology caused by the bacterium Edwardsiella tarda in striped bass

Edwardsiella tarda was isolated from moribund age‐0 hatchery‐reared striped bass Morone saxatilis for the first time. Pathogenicity was confirmed by contact infection. Characteristic histopathology consisted of epithelial hyperplasia and necrosis associated with the lateral line canals, and abscess formation in the anterior kidney and other internal organs

Transactions of the American Fisheries Society↗
USGS1986

Quantitative and qualitative studies of gut flora in striped bass from estuarine and coastal marine environments

Examination of the intestinal contents of 130 striped bass ( Morone saxatilis ) collected from the Hudson River and Long Island Sound during May to October 1981 showed that opportunistic fish pathogens—especially Aeromonas hydrophila —predominated in samples from both locations. Other isolates from both groups of striped bass included Vibrio , pseudomonads, flavobacteria, Alcaligenes , and enterics. Small numbers of Micrococcus , Bacillus , Corynebacterium , and Acinetobacter were also isolated. Total numbers of bacteria in the intestines were 100 to 1,000 times higher in striped bass from the Hudson River than in those from Long Island Sound.

Journal of Wildlife Diseases↗
USGS1985

Post-spawning mortality of rainbow trout (Salmo gairdneri) associated with Lactobacillus

A Lactobacillus sp. was consistently isolated from dead and moribund postspawning brood stock rainbow trout. Pathology was characterized by massive chronic inflammation throughout the abdominal cavity and formation of pseudomembranes. The bacteria were most abundant in spent testes. Repeated handling was considered to be the major stressor leading to this infection and subsequent high mortality.

Journal of Wildlife Diseases↗