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By Anthony Jr. Provenzano
The Biology of Crustacea
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If it weren't for mitochondria, scientists argue, we'd all nonetheless be single-celled micro organism. certainly, those tiny buildings within our cells are very important past imagining. with no mitochondria, we'd haven't any mobilephone suicide, no sculpting of embryonic form, no sexes, no menopause, no aging.
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Additional info for The Biology of Crustacea. Pathobiology
B o n a m i (1976) briefly mentioned the simultaneous occurrence of two types of naked paraspherical viral particles, 31 a n d 2 4 n m , respectively, in a diseased s p e c i m e n of M. depurator. Purified virus inoculated into healthy animals reproduced the disease. 3. N U C L E A R VIRUSES O F P O R T U N I D C R A B S Four of the five nuclear viruses of crabs b e l o n g to the insect-infecting family, Baculoviridae. T h e y differ from the majority of k n o w n baculovirid species by being n o n o c c l u d e d .
This rickettsia w a s discovered in diseased crabs taken from the Sete region o n the Mediterranean coast of France. Rickettsiae were transmit ted to healthy crabs by inoculation of tissue suspensions from diseased crabs. Experimental infection c a u s e d death in 15 days. 1. Pathogens: Viral, Rickettsial, Bacterial, Fungal 29 III. THE BACTERIA A. Introduction W e k n o w essentially nothing a b o u t the importance of bacteria as disease producers in natural populations of crustaceans. K n o w l e d g e of the bacterial associations of terrestrial crustaceans is lacking a n d most information o n aquatic species c o n c e r n s captive a n d cultured shrimp, crayfish, crabs, and lobsters.
Virus is still present in s o m e of these animals, as inocula tion of their h e m o l y m p h into normal crabs c a n induce the disease. Increas ing the dilution of infectious h e m o l y m p h taken d u r i n g the first 2 days of patent infection increases the time before an injected crab s h o w s lack of clotting ability. In later infection, the situation is reversed, patent infection occurring first in crabs inoculated with highly diluted infectious h e m o l y m p h , a n d later in those inoculated with more concentrated h e m o l y m p h .
The Biology of Crustacea. Pathobiology by Anthony Jr. Provenzano