Ecological Archives A023-084-A3

Kirsty L. Nash, Nicholas A. J. Graham, David R. Bellwood. 2013. Fish foraging patterns, vulnerability to fishing, and implications for the management of ecosystem function across scales. Ecological Applications 23:1632–1644. http://dx.doi.org/10.1890/12-2031.1

Appendix C. A table summarizing relationships between foraging metrics and body size for each functional group.

Summary of scaling parameters for the relationship in herbivorous fish functional groups between body length and (A) Intra-foray distance, and (B) Inter-foray distance, where parameters represent y = αxβ.

Site

α(± 95%CI)

β(± 95%CI)

R²

p value

A) Intra-foray Distance

Farmer

0.58  (0.01→36.06)

0.70 (-0.96→2.36)

0.19

0.329

Grazer/Detritivore

0.48 (0.04→5.86)

1.32 (0.51→2.15)

0.56

0.004**

Scraper/Excavator

0.04 (0.00→0.42)

2.01 (1.35→2.66)

0.86

<0.001**

Common parameters

 

1.46 (0.96→1.96)

0.89

<0.001**

Common Slope: Likelihood ratio statistic of 5.26, 2 d.f., p = 0.07

Common Elevation: Wald statistic of 32.86, 2 d.f., p < 0.001**

B) Inter-foray Distance

Farmer

0.14 (0.32→153.46)

0.76 (-0.49→2.00)

0.32

0.179

Grazer/Detritivore

0.15 (0.02→1.41)

2.42 (1.69→3.16)

0.84

<0.001**

Scraper/Excavator

1.08 (0.15→7.76)

1.76 (1.19→2.34)

0.86

<0.001**

Common Slope: Likelihood ratio of 10.63, 2 df, p = 0.005**

Common Elevation: NA


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