5 research outputs found
Studi Kelimpahan, Hubungan Panjang Berat, Pola Sebaran dan Faktor Kondisi L. intermedia (Gastropoda)
No full textLittorinidae is family of gastropods which found abundantly distributed from roots till the edge of mangroves leafs. The aims of research were to find out the abundance, length-weight relationship, distribution patterns and conditions factors of Littorina intermedia which is associated with mangrove ecosystems in Payum beach. This study conducted in three months start in June until August 2020 in the Mangrove Forest Ecosystem of Payum Merauke Beach. Line transect methods with purposive sampling are using to collected all the samples. There are three stations in this location. The results found in Stasion I tnd., respectively.   Both length and weight in the three stations separated into 4 categorize. The higest categories in St. I and St. II belong to category length between 0,96-1,70 cm approximately 638 ind and 84 ind. Reverse with that in St. III belong to category III (1,71-2,45 cm) with 15 ind. Furthermore, for weight analysis dominate with category I with 0,00-0,59 gram which is found in all station.  For lenght and weight analysis using Regreation showed Allometric Negative where the growth of length is faster than body weight. Morever the distribution pattern in all sampling site showed in clumped pattern. The condition factor of species L. intermedia, ranges from 0.31 to 26.45 with an average of 1.15. Key Words: Merauke; Weight-Length Relationship; Distribution; Gastropod; Littorin
Pendekatan DNA Barcoding untuk Identifikasi Cassidula angulifera (Petit, 1841) (Moluska: Gastropoda)
No full textA large number of gastropod species have similarities in morphology (cryptic) makes misidentification probably happen/occurred. Accurate species identification is needed in studying bioecology of species. This research aims to identify the species of Cassidulla sp. Which was collected from Peyum Beach Merauke with DNA barcoding techniques using COI gene markers. The primers used in this study are forward primers (LCO1490) and reverse primers (HCO2198). The result of identification with DNA barcoding showed that the species analyzed was Cassidula angulifera with a 99.53% similarity level with a DNA sequence length of 650 bp. Phylogenetic reconstruction showing the entire sequence of Cassidula sp. which were analyzed separately based on the type and genetic distance with high bootstrap value. Phylogenetic reconstruction of Cassidula sp. form a monophyletic group, which means that the species come from the same ancestors. DNA barcoding is very good and accurate in identifying species.Banyaknya spesies gastropoda yang memiliki kemiripan morfologi (cryptic) membuat kesalahan identifikasi sangat mungkin terjadi. Identifikasi spesies yang akurat sangat diperlukan dalam mempelajari bioekologi spesies. Penelitian ini bertujuan untuk mengidentifikasi spesies Cassidula sp. yang dikoleksi dari Pantai Payum Merauke dengan teknik DNA barcoding menggunakan marka gen COI. Primer yang digunakan dalam penelitian ini adalah primer forward (LCO1490) dan primer reverse (HCO2198). Hasil identifikasi dengan DNA barcoding, spesies yang dianalisis adalah Cassidula angulifera dengan tingkat kemiripan 99.53 % dengan panjang sekuen DNA 650 bp. Rekonstruksi filogenetik memperlihatkan seluruh sekuen Cassidula sp. yang dianalisis terpisah berdasarkan jenis dan jarak genetik dengan nilai boostrap yang tinggi. Rekonstruksi filogenetik Cassidula sp. membentuk kelompok monofiletik yang berarti spesies tersebut berasal dari tetua yang sama. DNA barcoding sangat baik dan akurat dalam mengidentifikasi spesies
Korelasi Sebaran Gastropoda dan Bahan Organik Dasar pada Ekosistem Mangrove di Perairan Pantai Payum, Merauke
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