Diverse deep-sea anglerfishes share a genetically reduced luminous symbiont that is acquired from the environment

Summary: This study examines the market share of traditional taxis and ridesourcing services using panel fractional regression model based on the taxi trip data of New York City in 2017. The results indicate that the market share of ridesourcing services is higher in remote areas, areas with low population density, low density of transportation facilities, low household income, and high proportion of young residents.

Summary: Despite a rich taxonomic literature on symbionts of ascidians, the nature of these symbioses remains poorly understood. A study conducted in the Egyptian Red Sea found a symbiotic relationship between the solitary ascidian Phallusia nigra and an amphipod and four copepod species. There was no competition or antagonism observed between these symbionts. The study also revealed significant differences in host characteristics and symbiont diversity among three reefs, but little effect of symbionts on host health, suggesting a commensal relationship.

Summary: This study provides a comprehensive analysis of the biogeography and ecophysiology of a widely distributed NCD, Gamma4. The research reveals that Gamma4 is a versatile heterotrophic NCD equipped with multiple strategies for nutrient scavenging and respiratory protection, with its metabolism regulated by specific systems responding to environmental factors. These findings have important implications for understanding the potential life strategies of pelagic NCDs.

Summary: Antarctic marine ecosystems, though largely untouched, can be heavily polluted near research stations. The ecological response to contaminants and stressors remains poorly understood, hindering efforts to reduce human impacts. This study compares the composition of epifaunal communities at different sites and finds that despite some persistence of metals in one site, overall biodiversity is high. The study highlights the influence of human activities on marine benthos and the need for regular monitoring to detect long-term trends.