Articles tagged with Mark and Recapture
A UMD-led study reveals that wild bats balance different types of immune defenses based on sex, age, and competition for mates. The researchers found that male bats rely more on rapid-response immune defenses, while females invest in targeted responses to pathogens.
A long-term study in southeastern Madagascar found that protected forest fragments improve the survival of endangered mouse lemurs. The study suggests that habitat protection is critical for conserving this species.
A landmark study by Macquarie University researchers shows that juvenile 'taster toads' can teach goannas to avoid eating poisonous cane toads, preventing population collapse. Goanna populations increased by up to 140% in areas where the 'taster toad' method was trialled.
Researchers have developed a method to control the electronic character of graphene nanoribbons by making metal contacts using direct-write scanning tunneling microscopy. This precise technique allows for device functionality needed for transistor function, overcoming previous uncertainty with giant electrodes.
A University of Illinois-led study reveals a significant decline in tropical forest bird populations, with 70% of understory bird species experiencing a drop of half or more since 1977. The findings highlight the importance of long-term studies and the need to address the lack of data on tropical bird populations.
Researchers found that in dry years, birds funnel into riparian environments due to increased greenness, leading to overcrowding and decreased bird populations. The study highlights the importance of understanding how birds respond to climate change for conservation purposes.
Researchers successfully estimated the size of bottlenose dolphin populations using unique signature whistles, with results matching traditional photographic mark-recapture methods. The technique has potential applications in tracking other species, including endangered humpback dolphins.
Researchers found that athletes who used a load velocity profile lifted less overall but gained strength and power, improving muscular performance. The study suggests that traditional training methods may not be the most effective, as athletes may lift too much or too little, leading to fatigue and injury.
A study published in PLOS Medicine found that law enforcement-related deaths in the US are significantly undercounted in official government data. The study used capture-recapture analysis and multilevel logistic regression to estimate the number of such deaths, finding that only 44.9% were documented by state death certificates compar...
A new WCS-led study analyzes camera trap time stamps to better estimate tiger abundance and understand their behaviors. The research uses a spatial capture-recapture model to incorporate the timing of tiger detections into analysis, offering crucial insights for effective conservation efforts.
Scientists used genetic analysis of otter droppings, known as spraint, to estimate the size of the population. They found around 20 otters living in a 35-square-kilometer area, with numbers fluctuating depending on pond yields.
A new method helps track individual male Asian elephants by analyzing their tusks, ears, and other features, aiding in poaching rate monitoring and conservation success. The study's results show 134 unique males out of a population of 991, with an adult male/female ratio of 1 to 4.33.
A study analyzing whale meat sold in Korean markets suggests the number of whales being sold for human consumption is much higher than reported to the International Whaling Commission. The researchers estimate that nearly twice as many minke whales passed through Korean markets between 1999 and 2003 as were officially reported.
Purdue University researchers developed a Near-Infrared Raman Imaging Microscope called NIRIM, which can analyze composite materials in real time. The instrument uses laser light to fingerprint samples as they are viewed under a microscope, providing detailed chemical information.