The bacteria that cause necrotizing hepatopancreatitis in Penaeus vannamei adversely affect penaeid shrimp cultured in the western hemisphere. 16S rRNA and gyrase B gene analyses determined the taxonomic position of these bacteria. The name "Candidatus Hepatobacter penaei" is proposed for these pathogenic bacteria, which are members of the Rickettsiales order.

We report here the complete genome sequence of Vibrio campbellii, isolated from Penaeus vannamei cultured in a Latin American country. The Tn3-like transposon and pirAB genes were encoded on the plasmid pLA16-2. These data support the geographical variations in the virulence plasmid found among acute hepatopancreatic necrosis disease (AHPND)-causing Vibrio isolates from Latin America and Asia.

UNLABELLED The Pacific white shrimp (Litopenaeus vannamei) is widely used in aquaculture, where it is reared at high stocking densities, temperatures, and nutrient concentrations. Here we report that adult L. vannamei shrimp emit the greenhouse gas nitrous oxide (N2O) at an average rate of 4.3 nmol N2O/individual × h, which is 1 to 2 orders of magnitude higher than previously measured N2O emiss...

Penelitian ini bertujuan untuk menguji toksisitas herbisida golongan asam phenoxy terhadap mortalitas udang vaname, dengan melakukan uji pendahuluan, persistensi, moertalitas dan kualitas air. Rancangan penelitian menggunakan metode regresi analisis probit 6 perlakuan 3 ulangan yaitu A konsentrasi 0 ml/L, B herbisisda DMA-6, 0,025 ml/L air, C 0,005 D 0,075 E 0,1 air F 0,125 Pestisida tidak berp...

Los cultivos larvales de Litopenaeus vannamei presentan altas mortalidades por la presencia del patógeno Vibrio parahaemolyticus, siendo combatido con antibióticos, lo que genera presión selección y resistencia bacteriana. Por se evaluó el extracto en testas Citrus paradisi para inhibir proliferación V. parahaemolyticus mejorar supervivencia L. vannamei, realizado Pontificia Universidad Católic...