The Isotope Project (2015) Mac OS

Operation, update your computer to R 3.2.2 for Mac OS X 10.9 or higher. Install 'IsotopeR' and the following dependencies (packages: fgui, runjags, ellipse, plotrix, colorspace) using the following code in R.
MS Project was designed and optimized specifically for the Windows operating system. Building project management software for Macs wasn’t Microsoft’s concern. In fact, the last time that there was a version of Microsoft Project for Apple users was back in 1993 with Microsoft Project 4.0 for Mac.
Seabirds are a highly endangered group of vertebrates; they are more threatened than any other group of bird. However, the Common Murre is one species that is showing an increasing population trend; I found that Common Murres have shown a significant increase in δ15N since 1994, in contrast to the threatened Marbled Murrelet, which has a similar biology but has shown decreasing δ15 N values.

The Isotope Project (2015) Mac Os Update
The Isotope Project (2015) Mac Os X
The Isotope Project (2015) Mac Os 11

Dark and rainy outside, so perfect for some creative installing of MAC OS X on a OLD Pentium 4 RARE JEWEL laptop with SiS Chipset. How things will go you wi. Researchers use isotope techniques to help ensure clean freshwater in Pampanga COVID-19 underscores the need for freshwater for health and hygiene; thus constant water shortages in various parts of the country are not only inconvenient but also pose a threat to efforts in preventing the pandemic.

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Williams Honors College, Honors Research Projects

Abstract

Seabirds are a highly endangered group of vertebrates; they are more threatened than any other group of bird. However, the Common Murre is one species that is showing an increasing population trend; I found that Common Murres have shown a significant increase in δ¹⁵N since 1994, in contrast to the threatened Marbled Murrelet, which has a similar biology but has shown decreasing δ¹⁵ N values that typically correlate with declining population size. This is potentially due to sexual dimorphism that allows for the Common Murre to fill a larger niche. While I found no statistical difference between male and female isotope values, further evaluation could be used to see if this larger niche is a result of other factors. Stable isotope analysis of δ¹³C and δ¹⁵N is one way to investigate these population trends since they are capable of showing foraging habit (inshore vs. offshore) along with trophic level. Unfortunately, as of now, there is no standardized way to sample feathers for isotope analysis, and it has been shown that different locations on the feather show different isotope values which correlate with the melanin concentration of the location. I found a consistent offset in δ¹³C between the tip and base of the feathers sampled. This offset could lead to slight differences in interpretation of the foraging strategy being used by the bird. Since seabirds are in such a threatened position, it is important to have a paramount understanding of their habits possible to ensure the best conservation efforts are being utilized.

Recommended Citation

Gosciak, Kimberly, 'Stable Isotopes in Seabirds' (2015). Williams Honors College, Honors Research Projects. 155.
https://ideaexchange.uakron.edu/honors_research_projects/155

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