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ILMU KELAUTAN: Indonesian Journal of Marine Sciences
Published by Universitas Diponegoro
ISSN : 08537291     EISSN : 24067598     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
ILMU KELAUTAN: Indonesian Journal of Marine Sciences (IJMS) is dedicated to published highest quality of research papers and review on all aspects of marine biology, marine conservation, marine culture, marine geology and oceanography.
Arjuna Subject : -
Articles 12 Documents
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Search results for , issue "Vol 28, No 1 (2023): Ilmu Kelautan" : 12 Documents clear
DNA Barcoding and Morphological Characters of Two Trevally Fish species (Caranx Spp.) Collected from Youtefa Bay, Papua, Indonesia Tamara Louraine Jeanette Kainama; Diah Permata Wijayanti; Agus Sabdono; Dio Dirgantara
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 1 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.1.97-104

Abstract

Trevally fish (Caranx spp,) or Kuwe fish (local name) are small pelagic fish that are mostly caught in the waters of Youtefa Bay. There are two types of Kuwe fish that are difficult to distinguish due to morphological similarities. These Kuwe fish have no scientific species identification so they have several different local names. Accordingly, it is necessary to identify and find out the proper naming of the two Kuwe fish. DNA barcoding is a technique used to speed up and simplify the process of identifying organisms. Hence, the purpose of this research was to identify the proper scientific name of the two Kuwe species in Youtefa Bay waters, as well as the kinship between these two types by applying a DNA barcoding technique. Nineteen Kuwe fish were sampled at Youtefa Bay, Jayapura, Papua in July 2022. Samples were studied morphologically, then carried directly to the Integrated Laboratory of Diponegoro University for molecular studies. DNA extraction, amplification, and DNA sequencing were carried out to further validate the species’ identification. The results showed that in the initial assessment of the specimens using taxonomic keys, 10 specimens were identified as Caranx sexfasciatus and 9 specimens were identified as Caranx tille. The relationship between length and weight of C. sexfasciatus and C. tille have resulted in b = 2.5754 with R2 = 0.8564 and   = 1.7119 with R2 = 0.6705, respectively. All identifications were confirmed as correct based on BLASTn results. The BLAST analysis demonstrated that 10 samples were closely related to C. sexfasciatus  (99%-100% in similarity) and 9 samples were similar to C. tille (97%- 99%). The genetic distance between individuals in C. sexfasciatus and C. tille has a value ranging from 0% - 0.2%, and the phylogenetic tree exposed that the two species are included in different clades. This study revealed that there are two species of Kuwe fish (C. sexfasciatus and C. tille) in Youtefa Bay, Papua, Indonesia.
Morphometry of Limulidae (Oscar E. Brown) in Leidong, Sei Berombang, and Tanjung Tiram, North Sumatera Zhulian Hikmah Hasibuan; Ita Widowati; Ervia Yudiati; Syukur Syukur
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 1 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.1.105-112

Abstract

Limulidae (Horseshoe crab), or Mimi in the local name, are known; there are four species, namely Limulus polyphemus in North America and Asia, namely Tachypleus tridentatus, T. gigas, and Carcinoscorpius rotundicauda. In Indonesia, these species are protected by the Decree of the Minister of Forestry Number 12/KPTS-II/1987; meanwhile, illegal fishing still occurs. This study aims to identify Limulidae species and analyze Mimi's morphometric characteristics and distribution in North Sumatra to conserve the species.  This research was conducted using a quantitative descriptive method in Leidong, Sei Berombang, Tanjung Tiram - North Sumatera, from September to December 2021. Biometric measurements were performed on 98 Mimi, and the data were statistically analyzed using the Kruskal Wallis test, Mann-Whitney test, and Multinomial logistics. The results showed that Mimi in the study area was identified as Tachypleus tridentatus, T. gigas, and Carcinoscorpius rotundicauda. The most commonly caught was T. tridentatus at the Tanjung Tiram. Based on the maximum width of the prosoma and body length, the largest to most petite sizes are T. tridentatus at Leidong (10.31 cm), T. gigas at Leidong, and Sei Berombang (10 cm) and C. rotundicauda at Sei Berombang (7.56 cm) respectively. The cluster analysis based on 27 morphometric characters showed that T. tridentatus had almost the same characteristics as T. gigas, while C. rotundicauda had its features. It can be concluded that the largest to most petite sizes of Mimi in the study area were T. tridentatus, T. gigas, and C. rotundicauda, respectively.

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