Biology and growth of Asiatic Hard Clam (Meretrix meretrix) population in Tanjung Balai, North Sumatera

Abstract

Asiatic hard clam (Meretrix meretrix) was one of molluscs (bivalve) with economical value. However, fishing activities were presumed to cause a decline in population. This condition was strengthened by the size of the clam which became smaller nowadays. The purpose of this study was to determine spatial distribution of M. meretrix, length distribution, and length-weight relationship. The study was conducted at 3 stations, consisted of Station I at Asahan River estuary which was located by mangrove forest, Station II at the sea and Station III at the waters near mainland of Batu Bara Regency. Estimation growth of M. meretrix was examined following FISAT II method. The density of M. meretrix was dominant at Station I which was low in salinity and high in organic matter. The class interval of 23-34 mm at station I dominated length distribution. Length-weight relationship was found to be very strong with determinant value approaching

Variability in the diet diversity of catfish highlighted through DNA barcoding

“…This study is the first of its kind to investigate the diversity of invertebrate prey in the diet of catfish using DNA barcodes. The economically important clams (Meritxix meritrix ) (Yeh et al, 2016;Desrita et al, 2019) and mussel (Perna viridis) (Sulvina et al, 2020) found in the diet of A. maculatus in this study is of concern, as local populations were known to depend on these resources for food. Since accurate identification of macro-benthic invertebrates from benthophagous fish could facilitate the assessment of human impact on the ecosystem (Tupinambás et al, 2015), further studies could be directed toward a detailed picture of trophic levels in DNA barcoding based gut analysis of other catfish and fin fish species inhabiting Vellar estuary (Khan et al, 2011;Sakthivel et al, 2012).…”

“…Previous nationalised efforts to barcoding the marine diversity (Lakra et al, 2010;Bineesh et al, 2014;Bamaniya et al, 2015) along with localised efforts to barcode the diversity of Vellar estuary (Khan et al, 2010(Khan et al, , 2011PrasannaKumar et al, 2012;Thirumaraiselvi et al, 2015;Rajthilak et al, 2015;Rahman et al, 2013Rahman et al, , 2019Hemalatha et al, 2016;Sahu et al, 2016;Palanisamy et al, 2020;Manikantan et al, 2020;Thangaraj et al, 2020;Narra et al, 2020) resulted in strengthening the reference library which insured that no ambiguous sequences were present in this study (as all sequences were identified to species level). Identification success was likely due to the use of previously generated references sequences from Indian waters from morphologically verified species and published through reference databases (such as GenBank and BOLD).…”

“…In addition, to capture potential genetic variation, including undocumented cryptic diversity, it is important to sequence an adequate number of individuals from across a species range (Weigt et al 2012b). We have made considerable efforts in the past decade as part of the Indian Census of Marine Life (ICoML) to recover barcodes in reasonable numbers of marine phyla including fin & shell fishes, invertebrates (Khan et al, 2010(Khan et al, , 2011PrasannaKumar et al, 2012;Thirumaraiselvi et al, 2015;Rajthilak et al, 2015;Rahman et al, 2013Rahman et al, , 2019Hemalatha et al, 2016;Palanisamy et al, 2020;Manikantan et al, 2020;Thangaraj et al, 2020) and plants (Sahu et al, 2016;Narra et al, 2020) occurring in and around the Vellar estuary. Hence we predict a high rate of success in identification of dietary items of A. maculatus occurring in this environment.…”

Natural Anticancer Peptides from Marine Animal Species: Evidence from In Vitro Cell Model Systems

“…The outer shell is white, with a purplish tinge on the postero-dorsal slope. Typically found in the sand and mud of intertidal areas and adapted to less saline environments, it feeds on plankton and detritus [42]. posterior edges.…”

“…Typically found in the sand and mud of intertidal areas and adapted to less saline environments, it feeds on plankton and detritus [42].…”