Dugan Finn Maynard

6 Questions 9 Answers 0 Followers

Questions related from Dugan Finn Maynard

Mvabund package can't handle offsets?

I have a set of fish data from a lake. I am trying to see whether the local fish community differs depending on the location within the lake (North, East, West), the presence of an island at the...

20 April 2021 7,156 0 View

If Moran's I is non-significant can I treat my samples as being independent?

I have a set of data collected as part of a hydroacoustic survey-- essentially a boat drove back and forth over a harbour and took a snapshot of the fish biomass/density underneath the boat every...

26 March 2021 875 4 View

Is a chi square test appropriate?

I have a dataset which consists of fish density/biomass from two sampling periods (1 and 2) in two locations (A and B). In sampling period 1 locations A and B are both clear, while in sampling...

15 March 2021 361 3 View

Is there a way to determine which species are driving convergence/divergence in a CTA?

I've performed a community trajectory analysis (CTA)* on fisheries data collected at 10 sites over 30 years. I've generated a table of Tau/p values to determine the strength, direction and...

04 March 2021 2,689 0 View

How to run repeated measures in mvabund?

I have a dataset of fish species abundances collected from 6 different habitats over the course of 30 years. Fish were collected multiple times per year and environmental variables were recorded...

22 February 2021 4,300 1 View

How to remove inter-year variation from my assessment of seasonal variation?

I have a 30 year dataset of fish sampling. I know from previous analyses that there is a huge amount of variation between years in catch rates. What I would like to do is create a plot that shows...

02 February 2021 4,252 5 View