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3.1 Diversity and you may wealth of the hermit crab community

3.1 Diversity and you may wealth of the hermit crab community

step 3.step 1.step one Sepangar coast

A maximum of 850 specimens had been obtained spanning of 5 kinds belonging to a couple of genera regarding family members Diogenidae: Clibanarius merguiensis, C. striolatus, Diogenes klaasi, D. pallescens and D. tumidus. The biggest species is actually C. striolatus (SL 5.64 ± 2.55 mm), followed closely by C. merguiensis (5.forty five ± dos.48 mm), D. pallescens (cuatro.37 ± dos.39 mm), D. klaasi (cuatro.twenty eight ± dos.37 mm) and you can D. tumidus (cuatro.14 ± step one.86 mm). The number one variety was recorded within a hundred yards (H? = step one.09) while the lowest at 0 yards (H? = 0.00) in which singular species (D. klaasi) was introduce. Hermit crab kinds on 100 yards was basically the most evenly marketed (J? = 0.79) as they was in fact at least uniformly marketed in the 0 m (J? = 0.00) (Table 2).

The overall highest density was reported for D. tumidus (8.98 ± 6.52 ind/m 2 ) which peaked at 50 m ( ± ind/m 2 ) but absent at 0 m (Figure 2a). This species was dominant at both 50 and 75 m stations (Figure 3a). Density of D. tumidus decreased gradually towards 100 m. On the other hand, D. klaasi was present in the first three stations (0, 25 and 50 m) and absent at 75 and 100 m. It was the sole species at 0 m with density of 6.25 ± 7.39 ind/m 2 . Peak density of this species was observed at 25 m ( ± ind/m 2 ) (Figure 2b). Densities of both Clibanarius species generally increased towards the sea. At the highest station (0 m), C. striolatus was absent but gradually increased in density from 25 m (0.22 ± 0.54 ind/m 2 ) to 100 m (5.33 ± 8.92 ind/m 2 ) (Figure 2c). Similarly, C. merguiensis was absent at 0 m but had density peak at 100 m (6.11 ± 7.20 ind/m 2 ). Lowest density of this species was recorded at 75 m (1.17 ± 2.07 ind/m 2 ) (Figure 2d). The results from ANOVA showed no significant difference (p > 0.05) in density among stations for all species. The least abundant species in the study was D. pallescens which was present at 50 m (0.11 ± 0.17 ind/m 2 ) and 100 m (0.11 ± 0.27 ind/m 2 ). Chi-square test revealed strong dependency/association (? 2 = , df = 16, p < 0.0001) of hermit crab species on stations/zones in Sepangar shore.

Indicate density (+SD) from hermit crabs of the varieties in the an enthusiastic (e-f) beaches. D. pallescens regarding Sepangar was not incorporated because of really low thickness and you will is missing in the most common stations.

3.1.2 Sulaman coast

There had been merely a couple of varieties on Sulaman coastline; new dominating D. foresti (SL dos.83 ± step one.03 mm) and one Diogenes sp. (Contour 3b) which had been too tiny (SL step 1.53 ± 0.42 mm) becoming totally known. Range and evenness indices just weren’t computed to own hermit crabs inside the Sulaman because of a decreased level of kinds. Thickness away from D. foresti generally decreased out-of step 3.33 ± dos.65 ind/yards 2 during the 0 m so you’re able to 0.16 ± 0.28 ind/meters 2 at 29 m (Figure 2e). Diogenes sp. is actually absent within 30 meters and occurred in few having a total mean occurrence away from 0.21 ± 0.32 ind/m dos . Chi-rectangular decide to try shown no relationship (? dos = 0.fifteen, df = 2, p > 0.05) anywhere between hermit crab variety and you can route for the Sulaman shore.

step three.dos Layer use

During the Sepangar coastline, all in all, 31 cover species were used by hermit crabs with a lot of filled shells being Clypeomorus batillariaeformis (%) with C. bifasciata (8.61%) and you may Rhinoclavis sinensis (4.13%) if you’re using different kind regarding shells was significantly reduced (Dining table step 3). Shells used by hermit crabs on channel 5 appeared to be the essential diverse (H? = step 1.29, J? = 0.51) certainly the channels whereas channel dos is actually at least varied (H? = 0.66, J? = 0.30) (Table cuatro). This new composition of hermit crabs in line with the five really occupied shells are revealed into the Shape 4. The new cover category ‘others’ represents the collective ratio of hermit crabs by kinds you to definitely made use of the leftover twenty six layer items. The latest blank shells out-of C. batillariaeformis constructed many shells utilized by all the hermit crab varieties while shells away from C. bifasciata illustrated ample ratio away from shells utilized by C. striolatus (17%), D. tumidus (11%) and D. klaasi (6%) (Contour 4). During the Sulaman coastline, just one or two shells were used of the hermit crabs: Nassarius livescens and you may Cerithidea cingulata on latter filled by 98% of your hermit crabs (Table step 3).

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