Contrasting displacement of the sea cucumber Holothuria arguinensis between adjacent nearshore habitats

Untitled

“…The whole study area was searched during each period of exposure (between 2 hours before low tide and 1 hour after it) and all holothurians found were marked in situ by means of scratching a code on their dorsal side (Reichenbach, 1999;Mercier, Battaglene, & Hamel, 2000;Navarro, García-Sanz, Barrio, & Tuya, 2013b;Siegenthaler et al, 2015) and released them at the same spot where captured. Although stress caused by marking and handling could result in increased initial activity (Shiell, 2006), scratching is considered as less invasive than other tagging methods (Conand, 1990;Kirshenbaum, Feindel, & Chen, 2006;Navarro, García-Sanz, & Tuya, 2014;Purcell, Agudo, & Gossuin, 2008;Schiell, 2006) and does not result in major behavioural changes (Mercier et al, 2000). Relative position (see Siegenthaler et al (2015) for the methodology used), total length (by means of metric tape), time and type of substrate were recorded for each sea cucumber sampled.…”

“…Size distribution was estimated from all captured individuals, applying a ShapiroWilk test for normality. Median movement speed was calculated per individual and per period, which was assumed to be more representative than mean movement speed, due to infrequent movements over longer distances (Navarro et al, 2013b(Navarro et al, , 2014Siegenthaler et al, 2015). Recapture probability was low (see the results section for details), limiting therefore the number of movements recorded.…”

An Application of Geographic Information System to Identify the Suitability of Sea Cucumbers (Holothuria scabra) in West Lombok Waters

“…The conclusion based on the results of research in the District West Lombok is the level of land suitability for cultivation Cucumber Sand in District West Lombok to the category of very suitable (S1) including A1, A2, A3, B3, C1, C2, C3 with a range of scoring (27-33 ), for the corresponding category (S2) include C4 and C5 with the range of values scoring (20)(21)(22)(23)(24)(25)(26) and the category of not suitable (N) between B1 and B2 with a range of values scoring (13)(14)(15)(16)(17)(18)(19). This research is a research stage plan for determining the location of the sand sea cucumber cultivation.…”

“…Land suitability classes are determined based on the interval between the other classes S1 (27-33), S2 (20)(21)(22)(23)(24)(25)(26) and N (13-19). Based on the results of scoring that has been adapted to the class interval obtained sample points with a very suitable category (S1) including A1, A2, A3, B3, C1, C2, C3.…”

“…Holothuria sanctori have food selectivity against sediment with high concentrations of organic matter. Consumption of organic material will increase with the increased availability of organic material [21].…”