| Summary: | Fish consumption target in Indonesia increased every year until 10%. Fish
consumption in DIY reach 17,03 kg/capita/year, but this region still deficit in fish
production. There is a kind of freshwater fish, called wader fish, that is
economically potential but still rarely cultivated. Yellow rasbora (Rasbora
lateristriata Bleeker, 1854) is one of wader species found in Yogyakarta. The
study on biological aspects of yellow rasbora such as sexual dimorphism very
important to support cultivation efforts. This research was aimed to study the
morphometry and bone structure differences between male and female wader pari
fish (Rasbora lateristriata). Spesimens were collected from the Baros River,
Tirtohargo, Kretek, Bantul, Yogyakarta. Seventeen males and 20 females
specimens (� 40 mm of standard length) were used in this researh. The specimens
were fixed with neutral buffered formalin (NBF) and observed morphologically.
Morphometric measurements were based on 39 points of anatomical landmarks on
fish.The result of each morphometric measurement were divided with the total
length of specimens to obtain the morphometric ratio. The skeleton preparation
were done using 96% alcohol fixed specimens and stained with Alizarin Red�s
Alcian Blue Method (Inouye, 1976). The results showed that the differences
between male and female wader pari could be seen through the morphology and
skeleton structure. Morphometric observations still show a lot of variety and there
were several parameters that indicate measurement similarities between male and
female wader pari. The conclusions of this study there was pattern of sexual
dimorphism wader pari fish is viewed by morphological character, there are head
and mouth�s shape, width of operculum, shape of dorsal fin�s cranial, abdomen
shape, and serta caudal fin�s shape. There are differences in the anatomical
structure of the bone, ie the difference lies the anal and dorsal pterygiopore also
costae orientation.
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