Pierre Thiriet

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Questions related from Pierre Thiriet

Do you know a free software for estimating fish-body size on stereoscopic footages ?

Stereo-video surveys of demersal fish assemblages are widely used. A field and video‐annotation guide for baited remote underwa... Stereoscopic footages are used to assess fish-body size. A...

23 January 2024 6,292 0 View

Can anyone help on terminology related to stratification of marine vegetation : understorey vs shrub vs bush?

I am marine ecologist working on infralittoral rocky reef in the Mediterranean Sea. I am studying 'Cystoseira forests', that is an assemblage of macroalgae dominated by Cystoseira species (around...

18 December 2013 2,755 1 View

Can anyone help with this terminology in ecology: process vs mechanism and function vs role?

What are the respective meanings of: - ecological processes vs. ecological mechanisms? Does a process includes several mechanisms, like a strategy includes several tactics? -ecological function...

04 December 2013 2,519 9 View

Do fish, bird or flying insect use similar anti-predator behavior in forest-like habitat: the canopy for hiding and the understory for fleeing ?

I studied anti-predator behavior of a demersal prey fish (a wrasse) facing a stalk-attack predator fish (a comber) in Cystoseira forest. This Mediterranean marine habitat include 3 main vertical...

30 May 2013 4,019 4 View

Is my way of weighting variables when calculating euclidean distance (multivariate context) correct?

I have a matrix [n individuals X 3 variables]. My 3 variables are proportions (summing up to 1 for each individual). I want to compute a distance matrix (between all pairs of individuals) using...

20 March 2013 5,807 9 View