PENGUKURAN PANJANG TUBUH CACING NIPAH PENDEK Namalycastis abiuma (POLYCHAETA: NEREDIDAE) DARI PERAIRAN MANGROVE SUNGAI KAPUAS KALIMANTAN BARAT

Abstract

AbstrakCacing Nipah Pendek Namalycastis abiuma memiliki tubuh yang elastis dan mudah putus sehingga diperlukan pendekatan morfometri tubuh lain untuk menentukan panjang tubuh sesungguhnya. Tujuan penelitian ini untuk menentukan panjang tubuh total cacing nipah pendek dengan menggunakan bobot tubuh, jumlah total segmen berseta, panjang tiga segmen anterior pertama (L3) dan lebar segmen berseta atau setiger ke-10 (S-10). Spesimen yang digunakan dipilih hanya individu yang lengkap dan utuh. Pengukuran dilakukan dibawah mikroskop dengan lensa okular yang dilengkapi dengan mikrometer. Data dianalisis dengan analisis korelasi. Cacing yang digunakan sebanyak 258 individu yang terdiri atas 190 immature, 54 submature dan 14 mature dengan ukuran panjang tubuh rata-rata berturut-turut 108,62±34,80 mm, 172,27±42,78 mm dan 123,14±57,40 mm. Cacing betina ditemukan memiliki ukuran tubuh lebih besar dari jantan. Panjang tubuh N. abiuma dapat diduga dengan bobot tubuh, panjang L3 dan lebar S-10 dengan nilai koefisien korelasi (r) berturut-turut 0,82, 0,73 dan 0,78. Pendekatan morfometri dapat digunakan untuk menentukan ukuran tubuh N. abiuma.Abstract The short nypa palm worm Namalycastis abiuma has an elastic and fragile body. Therefore, an alternative approach of morphometrical techniques is needed to determine the total body length. This research aimed to estimate the total body length of the short nypa palm worm based on body weight, the total number of segments, the length of the first three anterior segment (L3) and the tenth setiger width (S10). Body measurement was done using stereomicroscope fitted with the micrometer. Correlation analysis was done to describe the relationship between the length of L3 and the width of S10. A total of 258 complete and whole specimens consisted of 190 immature, 54 submature, and 14 mature individuals. The average body length of immature individuals was 108.62±34.80 mm, 172.27±42.78 mm for sub mature individuals, and 123.14±57.40 mm for mature individuals. Based on sexual dimorphism, the female body size is larger than male. The body length of N. abiuma can be estimated by body weight, the length of L3, and the width of S10, with correlation coefficient (r) of 0.82, 0.73 and 0.78, respectively. Morphometry approach can be used to determine the body size of N. abiuma.

Application of fraud pentagon in detecting financial statement fraud

“…The number of CEO images included in the company's annual statement does not indicate that the company CEO has dominant internal control, however, important CEO images are included in the annual statement to introduce the company CEO to the general public, especially stakeholders. This research is consistent with the research conducted by Aprilia (2017); Junardi et al, (2018), stated that the appearance frequency of CEO images did not significantly affect fraudulent financial statements.…”

“…The results showed that the directions change occurred within the company did not prove to have an effect on the level of fraudulent financial statements that occurred in the company. This research is consistent with Sihombing & Shiddiq (2014), and Junardi et al, (2018), found that capabilities proxied by the directions change had no effect on the occurrence of fraudulent financial statements.…”

Colonization of Nipa Worms (Namalycastis spp.) Based on Differences in Depth of Placement of Nipah Fronds in Kakap River of West Kalimantan

“…Informasi tentang cacing nipah di Kalimantan Barat sampai saat ini sebagian besar mengenai deskripsi morfologi dan maturasi N.terrestris (Chintia et al, 2020;Epriliony et al, 2021), karakteristik morfologi dan habitat N. rhodochorde , ukuran panjang tubuh N.abiuma (Junardi, 2018), sebagai informasi keberadaannya di habitat masih terbatas.…”

“…Kandungan bahan organik yang tinggi pada tanah dan pelepah nipah mendukung kelangsungan hidup Namalycastis spp., yang mengonsumsi bahan organik sebagai sumber makanannya. Hal ini sejalan dengan penelitian Junardi (2018) yang mengasumsikan bahwa Namalycastis abiuma mengonsumsi bahan organik yang membusuk dari nipah. Priyandayani et al (2018) menyatakan bahwa konsentrasi karbon organik yang relatif tinggi dalam substrat akan mengundang Polychaeta untuk mencari makan.…”

Marine polychaete Namalycastis sp. extracts enhance proliferation and regeneration of mice 3T3 fibroblast and MCR-5 human fibroblast cells

“…The Nereidinae have several modifications to their range of specialised morphology, physiology and reproductive adaptations compared to other families of polychaetes to survive in harsh environments. This marine worm was widely spread, inhabiting the Nipa palm and mangrove sediments along the coastal swamps in Malaysia ( Junardi, 2018 ). Polychaetes have been documented for their various agricultural utilities, for example, as a medium for the degradation of vegetation, wood and roots, as a bio-indicator in a marine environment for pollution and also used as a bio-remediation of wastewater by fish and other aquafarming industries ( Dean, 2008 , Sibaja-Cordero and Echeverria-Saenz, 2015 , Tomassetti and Porrello, 2005 ).…”