Findings: Male female ratio of green crabs, fall 2015-2017

Green crabs are eating away the habitats of many juvenile creatures. They are also going to put the hundreds of men and women working in the clamming industry out of jobs. My science class went to Reid State Park to find out, and collect data on the green crab. We did this by setting traps, marking the crabs, and finding their size and sex. When I analyzed our data I found that in 2016, the female population went up by 7.8% at Griffiths Head, 43% at Todds Landing, and 5% in Fort Popham. But then decreased a back down to what it was before in 2017. The reason my findings are important, are because we could find out if there is a certain nutricion gap, that is causing the females to decrease. We could also find a way to decrease the population of the males as well as the females.

Project Information
City or Town: 
Bath, Maine
School or Organization: 
Bath Middle School
Scientific name:
Carcinus maenas
Common name:
Green crab
Coastal - Rocky intertidal
Resources I used to create this project: 
Greenhalgh, Emily (2016): Climate and Lobsters > Porter, Tom (2015): Scientists Battle to Save Maine's Eelgrass from Destructive Invasive Crab <


Not accepted for publication in Volume 1. Love the citations, and the focus of the background material. The writer really informs the reader about the impact of her question, and how it can effect the local community and beyond. Loved the introduction. The EQ addresses the big question about impact and I'm curious about how the scientist will narrow her focus a bit. Methods demonstrate an ability to replicate but not sure how the data connects to the EQ. Graphs focus on populations but scientist mentions impacts in general in conclusions. Amazing work!

I recommend the paper because the author/researcher
·she explained why this problem is relevant and impacts the community and people
·she wrote it with a clear, to the point, easy to follow experiment
·she included reliable sources to back up her claims and opinions