Doctorado en Biociencias, Facultad de Ingeniería, Universidad de La Sabana, Chía 250001, Colombia.
Published: December 2023
AI Article Synopsis
Article Abstract
The bacterium strain sp. C33 was isolated from the intestinal microbial content of Nile tilapia (. ) under anaerobic conditions. Given that species are recognized as primary constituents of the intestinal microbiota in cultured Nile tilapia by culture-independent techniques, the adaptability of the C33 strain to the host gastrointestinal conditions, its antibacterial activity against aquaculture bacterial and its antibiotic susceptibility were assessed. The genome of C33 was sequenced, assembled, annotated, and subjected to functional inference, particularly regarding pinpointed probiotic activities. Furthermore, phylogenomic comparative analyses were performed including closely reported strains/species relatives. Comparative genomics with closely related species disclosed that the isolate is not phylogenetically identical to other species, displaying an approximately 5% sequence divergence from . and a 13% sequence divergence from . It can be distinguished from other species through physiological and biochemical criteria. Whole-genome annotation highlighted that sp. nov. C33 possesses a set of genes that may contribute to antagonism against competing bacteria and has specific symbiotic adaptations in fish. Additional in vivo experiments should be carried out to verify favorable features, reinforcing its potential as a probiotic bacterium.
Nowadays, consumption of fish is becoming a public health concern due to quality and safety issues. This study was designed to assess the proximate composition, microbial quality, and heavy metal accumulation in the Nile tilapia fillet at three selected landing sites in Lake Tana. Fifteen samples were collected and analyzed.
This study aims to examine the restorative impact of corn cob biochar (CCB) on pendimethalin (PMD)-induced toxicity in Oreochromis niloticus. Fish were divided into four groups: the first control group without treatment, the second group (CCB) exposed to 10 g CCB/L, the third group (PDM) exposed to 0.355 mg PDM/L, and the fourth group (PDM+ CCB) receiving both 0.
Sensory processing of communication stimuli is essential for the survival of organisms across all evolutionary branches. Multimodal signaling, the use of multiple sensory systems is crucial in this process, but little is known about the relative importance of different senses used during aggression. We used the African cichlid fish, Astatotilapia burtoni, to test how visual and chemosensory signals in male-male interactions influence behavior.
There are about 33,000 different species of fish and they are visually identified using variety of traits, i.e., size and shape of body, head's size and shape, skin pattern, fin pattern, mouth pattern, scale pattern, and eye pattern etc.
