Population structure of Lingula (Bruguière, 1791) in Alue Naga waters, Banda Aceh City, Indonesia

Abstract

Lingula sp. is one of the genera of the Brachiopoda phylum that lives in the intertidal zone or areas that are affected by tides. The purpose of this study was to determine the population structure of Lingula sp. through the approach of population structure, density, distribution patterns, length and weight relationship and with physical and chemical parameters in the waters of Alue Naga, Syiah Kuala District, Banda Aceh City. The method used in this research is a purposive random sampling method. The results show that the growth pattern of Lingula sp. is classified as negative allometric at three research sites in Alue Naga waters, based on the value of b 3. The density of Lingula sp. was the highest at site 1 with a total of 17.7 ind/m2. While the density of Lingula sp. was the lowest at site 3 with a total of 9.7 ind/m2. The distribution of Lingula sp. at the three sites were uniform, with morisita index (Id) values of 0.352, 0.257, and 0.208 for sites 1, 2, and 3 respectively. In addition, the environmental factors of the three research sites in Alue Naga waters are within the normal limits of life for Lingula sp.Keywords: Alue NagaLingula sp. Population structure

Density of baree (Lingula anatina Lamarck, 1801) in Ulee Lheue beach, Indonesia

“…The L. anatina or the baree found in the waters of Ulee Lheue is the species L. anatina Lamarck, 1801), according to morphological identification from [5] and [11]. The dorsal and ventral valves of baree, which are located in the Lubuk Damar mangrove ecosystem of Aceh Tamiang, have different colors and have an oval-ovoid shell form with a bright greenish tint.…”

“…The pedicle is a firm, brownish-cream-colored extension of the body that is elongated. The L. anatina pedicle has a transparent layer (cuticle), and the tip is protected by a substrate and mucus [2,[5][6][7][8] and [11] both share the same features, namely a spherical, oval shell with a bright greenish tint. Lingula discovered in Ulee experienced the same thing.…”

“…The high temperature will make the salt content of the water also high. Meanwhile, the type of substrate obtained is loamy sand so that it is suitable for the habitat of baree species which prefer habitats in the form of decomposed black mud sandy mud [5]. Baree found in each research plot along with environmental parameters (temperature, salinity, pH, and substrate (sand, silt, clay) were associated with principal component analysis (PCA).…”

“…In this study, the conditions of water quality and substrate were still within normal limits for bare life. Infauna is more accepting of all environmental conditions towards itself so this is one of the bioindicator characteristics of the biota [5][6][7][8].…”

“…Several studies of baree density in the coast of Aceh that have been carried out on namely [5][6][7][8]. Baree research is still being carried out considering that this biota is an ancient biota whose existence must continue to be considered so that the balance of nature continues.…”