Today Boa snakes have a patchy distribution in the islands that form the Lesser Antilles in the Caribbean Sea, but the constrictors are nearly absent from archaeological deposits in the region. Whether this scarcity is due to biological or cultural factors remains unknown. The current study describes the first Boa finds on Martinique, Basse-Terre and La Désirade, and provides a new hypothesis concerning the relationship between indigenous human populations and Boa prior to Western colonization.
A new electronic tagging study of 100 Potomac River striped bass sheds light on rockfish migration in Chesapeake Bay and the Atlantic Coast. University of Maryland Center for Environmental Science researchers found that when rockfish reach 32 inches in length they leave Chesapeake Bay and become ocean migrators. Small fish stayed in the Bay had higher mortality rates than those that undertook ocean migrations.
By tagging and tracking migrating humpback whales that feed in the Magellan Strait in Chile, the scientists were able to provide policy recommendations to reduce the risk of collisions.
Reproducing efficiently in captivity is crucial for the survival of many wildlife species, yet reproductive success is often lower than in the wild. Currently, many zoo population management strategies prioritize the genetic diversity of captive populations. Scientists now argue that a broader perspective is required which also includes behavior, life-history, husbandry and environmental considerations. This would improve breeding success in zoos and the maintenance of the diversity of traits, behaviors, and phenotypes of threatened species.
Microorganisms living inside and on our body play a crucial role in both the maintenance of our health and the development of disease. Now researchers at UTSA have uncovered evidence about the importance of maintaining physical distance to minimize the spread of microbes among individuals.
Flowering strips -- plants used to augment bee foraging habitats -- can help increase bee reproduction but may also increase pathogen infection rates.
Death certificate data were used to compare the rate of opioid-related deaths in the US among cancer survivors with that of the general population from 2006 through 2016. Whether opioid-associated deaths in cancer survivors, who are often prescribed opioids for cancer-related pain, are rising at the same rate as in the general population is unknown.
Investing in the future: Researchers show how cannibalism among the invasive comb jelly enables adults to survive severe conditions at the edge of their ecological range with implications for the use and evolutionary origins of cannibalism.
Researchers at Purdue University have discovered that male treefrogs reduce their attractiveness to predators and parasites by overlapping their mating calls with their neighbors.
The yellow-legged gull has a high ability to adapt to human activities and benefit from these as a food resource during all year. This is stated in a scientific article published in the journal Ecology and Evolution whose first author is the researcher Francisco Ramírez, from the Faculty of Biology and the Biodiversity Research Institute (IRBio) of the University of Barcelona.