Spatial distribution management of Crustacea (Decapoda) based on conservation in tropical tidal lake

Abstract

Abstract. Muhtadi A, Yulianda F, Boer MF, Krisanti M. 2022. Spatial distribution management of Crustacea (Decapoda) based on conservation in tropical tidal lake. Biodiversitas 23: 4064-4072. Siombak Lake has a unique biological system impacted by high and low tides. Crustaceans (Decapoda) found in this lake are predicted to establish distinctive communities due to their interaction with two biological systems of seawater and freshwater. Therefore, this study aimed to determine the characteristics and distribution of crustacean communities in Siombak Lake, which were influenced by high and low tides. Crustacean samples were taken and observed every month at high and low tides with traps from September 2018 to August 2019. The crustaceans discovered included 5 families and 18 species, with 13 crabs and 5 shrimp. The communities' distribution is extremely dynamic, as seen by the emergence of mangrove crabs at high tide and fiddle crabs during low tide. The crustacean communities are more influenced by tidal ecology, characterized by a higher abundance of individuals at high tide. Furthermore, crustacean density fluctuates throughout the year and reaches the highest in March with 8679 ind/100m2. Penaeid shrimp are always found at high and low tides, dominated by Parapenaeopsis coromandelica, while mangrove crabs are only found at high tide. Therefore, efforts are required to conserve mangrove crabs and enhance their habitats for sustainable usage.

The relationship between water quality and aquatic organisms in tidal lakes, Medan-Indonesia

“…Data collection on water quality and aquatic biology is carried out every full moon at high and low tide. Water quality data refers to water biology and is further processed from previous research by [2,4,5,6,7,8,10].…”

“…Some mangroves develop around the lake's perimeter [3,4]. The aquatic biota of Siombak Lake consists of groups of freshwater fish, brackish, and marine creatures [5][6][7][8]. Siombak Lake serves as catchment area for water, a flood control zone, a fishing area for fish, shellfish, and crabs, and a tourist attraction.…”

“…Various studies of Siombak Lake have been conducted, including on morphology and hydrodynamics as well as the status and profile of lake water quality [1,2,10,11]. Studies on aquatic biodiversity such as fish, crustaceans, mollusks, and plankton have also been conducted [3][4][5][6][7][8]. In addition, studies on mangroves and bird and mammal biodiversity have been reported in 2020 and 2021 [3,12].…”

Ichthyofauna Diversity and Its Distribution in a Low-Saline Lake of Indonesia

“…Mangrove trees grow on various sides of the lake border, such as Nipa Palm, Mangrove Apple, and other mangroves (Muhtadi et al 2020b). Other aquatic organisms in this lake include crabs, shrimp, snails, and fish (Leidonald et al 2019;Muhtadi et al 2022;Yulianda et al 2020). This lake has an area of 29 ha with an average depth when the mean sea level is 1.12 during the rainy season and 1.10 during the dry season (Muhtadi et al 2020a).…”

“…Thus, Lake Siombak is a flooded ecosystem (lotic system) and is directly connected to the coast and ocean so that it is the estuary (coastal lagoon), which is the habitat for various flora and fauna (Leidonald et al 2019;Muhtadi et al 2020bMuhtadi et al , 2020cMuhtadi et al , 2021Muhtadi et al , 2022Yulianda et al 2020). Ecologically, coastal lagoon acts as a life support system for various aquatic organisms and terrestrial organisms (Djihouessi et al 2019;Gbaguidi et al 2016) on the coast as a feeding ground, nursery ground and as spawning ground (Baptista et al 2019;Berkström et al 2020;Jaxion-Harm and Speight 2016;Lett et al 2019;Ocana-Luna and Sánchez-Ramírez 2016).…”