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Keragaman Morfometrik dan Genetik Gen COI Belut Sawah (Monopterus albus) Asal Empat Populasi di Jawa Barat Lella Herdiana; Muhammad Mukhlis Kamal; Nurlisa Alias Butet; Ridwan Affandi
Jurnal Ilmu Pertanian Indonesia Vol. 22 No. 3 (2017): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.923 KB) | DOI: 10.18343/jipi.22.3.180

Abstract

Swamp eel (Monopterus albus) is an economically important freshwater fish which has the potential to sustainable development. This species is considered as one of the taxonomically problematic spesies due to its complex characters and similar morphology to Monopterus cuchia and Monopterus javanensis that often lead to taxonomic dilemmas. Taxonomic certainty is an essential basis information in sustainable fisheries management, studies on morphometric characters, and genetic variability is a method which commonly used for species or stock identification. This study was aimed to validate the taxonomy certainty and evaluate the kinship of swamp eel from four populations (Indramayu, Subang, Tasikmalaya, and Garut distrik) in West Java. Morphometric analysis was conducted by measurement of 19 characters, whereas genetic analysis was conducted using PCR-Sequencing method of COI gene. The results from stepwise discriminant analysis showed that 7 morphometric characters ratio were powerful to classified the populations and the first two discriminant functions accounted 84.2% of the total variability. Genetic diversity indicated by alignment 14 sekuen of COI gene showed there were 11 haplotypes from 109 variable sites. Results of cluster and phylogenetic tree analysis indicated that swamp eel from four research populations were grouped into two major clusters. The first cluster consists of Indramayu and Subang population, the second cluster consists of Tasikmalaya and Garut population. This cluster is an evidence that swamp eel from West Java possesed morphometric and genetic diversity among populations and lead to assumption that at least there were two cryptic species from M. albus in West Java. 
PERPINDAHAN ONTOGENETIK HABITAT IKAN DI PERAIRAN EKOSISTEM HUTAN MANGROVE Muhammad Nur Findra; La Ode Hasrun; Nadya Adharani; Lella Herdiana
Media Konservasi Vol 21 No 3 (2016): Media Konservasi Vol. 21 No. 3 Desember 2016
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (334.371 KB) | DOI: 10.29244/medkon.21.3.304-309

Abstract

Ontogenetic of fish is a term used to study the development of the behavior of an individual throughout its life (life-span) from hatched to death. The mangrove ecosystem is a potential habitat for fish, especially the juvenile stage. Juvenile found in this habitat is an important economically fish. In various types of fish, the phenomenon of increasing the size of the fish body followed by changes in the types of food causing ontogenetic habitat of fish. It is evident in yellow snapper Lutjanus argentiventris. The juveniles live in mangrove habitat to approximately 100 mm or 300 days old, after which the fish move to deeper surrounding habitat. Mangrove forest that has a high complexity is to serve as an adaptation of fish to avoid predators and foraging. Several different habitats, both the mangrove ecosystem and other ecosystems provide different foods according to the needs at each phase-change of fish life. Animals that undergo ontogenetic habitat drift has management consequences that are more sensitive than animals inhabiting on single habitat. Hence, particularly habitat conservation resource management is needed. Not only conservation of the habitat, but also other habitats related to  the migration of fish.   Keyword: conservation, diet, growth, mangrove, ontogenetic