Lepidophthalmus siriboia (Felder and Rodrigues, 1993)

Santos, Thuareag Monteiro Trindade dos, Aviz, Daiane & Filho, José Souto Rosa, 2024, Small-scale spatial distribution of ghost shrimp and macrobenthic fauna in an Amazon macrotidal dissipative sandy beach, Journal of Natural History 58 (1 - 4), pp. 218-235 : 223-224

Lepidophtalmus siriboia density

The mean burrow density, including both areas, was 31.7 ± 34.1 burrows.m −2 and there were significant differences between areas (F (1, 238) = 25.66; p <0.001) and between intertidal zones (F(1, 238) = 114.85; p <0.001), with interaction between factors (F(1, 238) = 7.76; p <0.001). In general, higher densities were recorded at Area 1 in LT (86.17 ± 41.3 burrows.m −2). Except for the HT zone (where no burrows were found in both areas), the intertidal zones of Area 1 have higher burrow densities than those of Area 1 ( Figure 3 ). However, the two areas have similar patterns of distribution of burrow-density increases towards the sea ( Figure 3 ).

The best-fitting regression model to explain the variation spatial of L. siriboia included the grain size and proportions of finer (silt + clay) ( Table 2 ). A negative relationship was observed between the grain size and density of L. siriboia burrows. By contrast, the density of shrimp burrows increased with an increasing percentage of finer sediment (silt and clay).

Figures

Figure 3. Mean density (± standard error) of the Lepidophtalmus siriboia burrows in the intertidal zones (HT: high intertidal; MT: mid intertidal; LT: low intertidal) of the study areas (Area 1: muddy sediment – next to a tidal channel, Area 2: sandy sediment). Different letters indicate significant differences (p <0.05); letters indicate the results of Tukey tests for the comparisons between areas (uppercase letters) and among intertidal zones (lowercase letters).