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Biological sciences

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Viral lysis and bacterivory during a phytoplankton bloom in a coastal water microcosm

Article Abstract:

The different proportions of bacterial mortality due to viral lysis orbacterivory at different stages of a phytoplankton bloom in a coastal water microcosm was investigated. A microcosm experiment was conducted, with the appearance of a phytoplankton bloom simulated by adding nutrients to the natural water sample, to estimate the proportion of bacterial mortality due to viral lysis and bacterivory. Results revealed that bacterivory and viral lysis did not present their maximal values at the same stage of the bloom. While bacterivory was maximal soon after the bloom when bacterial abundance was maximal, viral production demonstrated maximal values when the phytoplankton bloom had declined.

Water bloom, Algal blooms, Marine bacteria, Aquatic ecology, Phytoplankton

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Detection of carp interstitial nephritis and gill necrosis virus in fish droppings

Article Abstract:

PCR is used to demonstrate that fish droppings contain viral DNA and also contain viral antigens, which are useful for carp interstitial nephritis and gill necrosis virus (CNGV) diagnosis. Results reveal that CNGV can be identified by using droppings without taking biopsies or killing fish and that CNGV is present in the stools of sick fish.

Health aspects, Diagnosis, Carp, Carp (Fish), Necrosis, Nephritis

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Detection of Arcobacter spp. in the coastal environment of the Mediterranean Sea

Article Abstract:

Knowledge of the survival strategies of arcobacters in the environment is very important for control of both water quality and transmission of disease. The occurrence of Arcobacter spp. in seawater and plankton samples collected form the Straits of Messina, Italy, is examined.

Italy, Plankton

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