Relationships between human population size and average fish weight and relative fish density of individual parrotfish species across the Caribbean.

<p>a) Spearman rank correlation coefficients (+95% one-tailed upper confidence interval; black circles) between human population size and the average fish weight for eight frequently occurring parrotfish species across the Caribbean; the correlation coefficients are ordered as a function maximum body length for each species (as reported by <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0086291#pone.0086291-Robertson1" target="_blank">[41]</a>); grey line illustrates the relationship between the magnitude of the correlation coefficients and body size; the eight correlation values were incorporated into one summary correlation coefficient (+95% one-tailed confidence interval; black square); see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0086291#pone-0086291-t005" target="_blank">Table 5</a> for number of reef-surveys included in the correlation analysis for each species. b) Plot illustrating fish density scores of eight frequently occurring parrotfish species along one redundancy analysis axis representing a gradient of human population size; the species scores were obtained by constraining the species composition of the parrotfish assemblage by human population size across the Caribbean region; the size of the circles representing the species is proportional to the maximum body length of each species (n = 274 reef-surveys).