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Ricefish

About: Ricefish is a research topic. Over the lifetime, 23 publications have been published within this topic receiving 348 citations. The topic is also known as: Adrianichthyidae.

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Journal ArticleDOI
TL;DR: Ricefishes, known best by the model organism, the medaka, Oryzias latipes Temminck & Schlegel, 1846, comprise the family Adrianichthyidae, which ranges broadly throughout fresh and brackish waters of Central, South and Southeast Asia and the Indo-Malay-Philippines Archipelago as far east as Timor.

125 citations

Journal ArticleDOI
01 Oct 2013-Copeia
TL;DR: Maximum parsimony and Bayesian inference analyses of the mitochondrial cytochrome c oxidase subunit 1 (COI) sequence, the DNA barcode, support the hypothesis that the two new species are sequenced representatives of three species.
Abstract: Oryzias asinua and O. wolasi are two new species of ricefishes described from several disjunct inland freshwater habitats in the Indonesian province of Sulawesi Tenggara or southeastern Sulawesi. With O. woworae, the first described endemic ricefish of Sulawesi Tenggara, they comprise a group of small, colorful species characterized by orange to deep red dorsal and ventral margins of the caudal fin and the ventral margin of the caudal peduncle and at least the posterior portion of the base of the anal fin, and a bluish sheen on the body in both sexes that is most pronounced in live adult males. The two new species are distinguished from O. woworae by elongate middle dorsal-fin rays in adult males that reach the posterior extent of the first principal caudal-fin ray and by an orange-colored olfactory epithelium that marks each nasal organ in females. Oryzias asinua is relatively slender compared to O. wolasi and O. woworae: the body is narrow (21–25% SL, with a mean 22.9, in O. asinua versus 23–32% SL, mea...

37 citations

Journal Article
TL;DR: Rereshwater fishes are usually appropriate for use in biogeography studies, primarily because of their restricted distribution and the strong relationship between evolutionary history and geologi-cal events.
Abstract: reshwater fishes are usually appropriatefor use in biogeography studies, primarily becauseof their restricted distribution and the strong asso-ciation between evolutionary history and geologi-cal events. Unfortunately, their native habitatshave been seriously altered by human activities inrecent years. Several local extinctions haveoccurred, especially among lowland species inTaiwan.The typical example is the ricefish,

34 citations

Journal ArticleDOI
TL;DR: The present discovery adds another new ricefi sh species to Sulawesi's still only partially known ichthyofauna, and highlights the island's role as hotspot of adrianichthyid diversity.
Abstract: A new species of ricefi sh is described from a hill stream in Tana Toraja, Sulawesi. Oryzias eversi, new species, is distinguished from all other adrianichthyids in Sulawesi by having a low number of fi n rays in anal (17-18 (19)) and dorsal (10-12) fi ns, only 33-36 scales in lateral midline, ½14 transverse scale rows at dorsal fi n origin, 30-32 (33) vertebrae, small eyes (28.2-35.5% of head length), a conspicuous blackish male courtship colouration, and pelvic brooding behaviour similar to lacustrine ricefi shes. Female Oryzias eversi carry the eggs until the embryos hatch, and show a conspicuous abdominal concavity and extended pelvic fi ns, accommodating and holding the clutch of eggs. The eggs are connected to the female for the whole time of development by attaching fi laments that protrude from the female's urogenital pore. A mitochondrial haplotype phylogeny suggests that the new species is closely related to another "pelvic brooder", the lake-dwelling O. sarasinorum from Lake Lindu in Central Sulawesi. However, the haplotype group of O. eversi and O. sarasinorum is nested within a clade of egg-depositing Oryzias from central, southwest, and southeast Sulawesi, whereas another pelvic brooder, Adrianichthys oophorus from Lake Poso, forms a distinct, second lineage of Sulawesi's ricefi shes. Accordingly, the pelvic brooding strategy has probably evolved more than once and may be realised in river habitats, which represents a new evolutionary trajectory in the radiation of ricefi shes in Sulawesi. The present discovery adds another new ricefi sh species to Sulawesi's still only partially known ichthyofauna, and highlights the island's role as hotspot of adrianichthyid diversity.

27 citations

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20211
20201
20192
20181
20141
20131