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Terrestrial and Aquatic Ecology

Sacred Heart University

Project Limulus

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Full-Text Articles in Life Sciences

Rcrab: An R Analytics Tool To Visualize And Analyze The Movement Of Horseshoe Crabs In Long Island Sound, Ismael Youssef, Samah Senbel, Jo-Marie Kasinak, Jennifer Mattei Aug 2019

Rcrab: An R Analytics Tool To Visualize And Analyze The Movement Of Horseshoe Crabs In Long Island Sound, Ismael Youssef, Samah Senbel, Jo-Marie Kasinak, Jennifer Mattei

School of Computer Science & Engineering Faculty Publications

Mark-recapture programs are important for studying the ecology and population dynamics of wildlife. An R shiny analytics tool was developed to track the movement of horseshoe crabs in Long Island Sound based on tag and resight data. The crabs were tagged and recaptured by volunteers of Project Limulus, a community-based research program. The dataset contains tag and recapture location information for 14,065 horseshoe crabs over 18 years. The dataset was initially cleaned by removing records with missing, duplicate or incorrect data. A new data structure was developed to save the data and simplify processing: Three dimensions were used, one for …


Biology Department Receives Grant To Assess Juvenile Horseshoe Crab Populations In Long Island Sound, Jennifer Mattei Dec 2013

Biology Department Receives Grant To Assess Juvenile Horseshoe Crab Populations In Long Island Sound, Jennifer Mattei

Jennifer Mattei

No abstract provided.


Biology Department Receives Grant To Assess Juvenile Horseshoe Crab Populations In Long Island Sound, Mark Beekey Dec 2013

Biology Department Receives Grant To Assess Juvenile Horseshoe Crab Populations In Long Island Sound, Mark Beekey

Mark Beekey

No abstract provided.


Project Limulus: Understanding And Conserving A Critical Natural Resource, Jennifer H. Mattei Jun 2012

Project Limulus: Understanding And Conserving A Critical Natural Resource, Jennifer H. Mattei

Jennifer Mattei

Mattei, fellow SHU associate professor of Biology, Dr. Mark Beekey, and many other devoted biologists and conservationists are deeply committed to studying and preserving Limulus polyphemus – the American horseshoe crab. A concerted effort is now under way to locate, count and tag horseshoe crabs – whose numbers have declined since the early 1990s. The crabs are considered to be both a dominant and a “keystone” species of the intertidal zone. Their greatest value to humankind is that the blood of Limulus has an amazing property: It contains unique blood cells (amebocytes) that are used to test human vaccines for …