Gerardo Avalos

13 Questions 24 Answers 0 Followers

Questions related from Gerardo Avalos

Is there an allometric equation to estimate carbon sequestration and above-ground biomass of Butia palms?

Allometric equation estimate carbon and above-ground biomass based on diameter, height, tissue density, etc.

07 May 2023 5,530 0 View

How to add a phylogenetic correction to data from a phylogenetic tree?

I have a published phylogenetic tree but no access to the rough data used to generate the tree. I want to compare among clades in terms of morphological characters. How do I include the...

18 September 2022 9,364 1 View

What are the best conditions to establish Ginkgo seedlings in the tropics?

I have had some success germinating Ginkgo seeds in Costa Rica. I would like to know recommendations to secure seedling establishment. Right now they are in 1.5 L plastic bags on organic soil at...

20 November 2021 8,423 4 View

What are the best methods to germinate Ginkgo biloba seeds and favor seedling establishment?

Dear all, I have a limited supply of Ginkgo biloba seeds from Japan. My purpose is to germinate the seeds and hopefully establish some G. biloba specimens in Costa Rica. What could be the best...

22 October 2021 889 9 View

Is it ok to drop a non-linear treatment level in ANCOVA?

I am running an ANCOVA to measure differences in an allometric relationship between tree height (dependent variable) and diameter (covariate) among one nutrient treatment with 4 levels. One of the...

09 October 2021 2,211 8 View

Where to find free images of plant anatomy?

I am looking for free images of plant anatomical structures to be included in a book on plant anatomy. Specifically, I am looking for light microscope images of plant cells and tissues. I have...

29 March 2021 6,019 6 View

What platforms would you recommend for online classes that are flexible, easy to use, and free or inexpensive?

With COVID-19 universities around the world are switching to online courses overnight. However, many faculty are not used to online courses and do not have the platforms that will make this task...

14 March 2020 815 20 View

Population viability analysis: what software alternatives could you recommend?

Dear colleagues, I would like to find recommendations on software options to analyze population viability. I used VORTEX a while back. However I would like to see if there are other alternatives....

26 August 2019 9,515 3 View

What is the most efficient open source software to analyze videos of hummingbird behavior?

I need to analyze videos of hummingbirds visiting flowers and artificial feeders. I am interested in quantifying interactions as well as resource use, and thus, I need software that will allow me...

25 February 2016 5,765 2 View

Is there a simple and free map editing software?

I need to create a simple map. However, I have been unable to find something simple, and hopefully free (it should have layers such as roads and protected areas). I have tried some applications...

01 January 2016 6,040 34 View

How do you measure sugar consumption by hummingbirds using artificial feeders?

Is there a simple way to quantify the amount of volume consumed by a hummingbird using artificial feeders? This could be very minute amounts every time a hummingbird sips the solution from the...

12 November 2014 8,838 3 View

Is there an R manual with a strong intro to R, and good multivariate stats and graphics?

The manuals I have seen are a bit frustrating. They are either too simple, or too complex. Is there a manual that has a strong intro to R, good explanation of multivariate stats, and good intro to...

10 July 2014 3,914 10 View

How can I set up an old Hansatech oxygen electrode?

I wonder if out there someone could provide a manual that explains how to set up the cables of the Hansatech oxygen electrode. The equipment I have is a bit old (from the mid 90s), and thus, I...

18 October 2013 9,291 4 View