Management of Marine Resources

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Browsing Management of Marine Resources by Subject "B.hasselti"

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    Analisis Saluran Pencernaan Ikan Selinca (Belontia hasselti) dari kanal sawit di Desa Terantang Kecamatan Tambang Kabupaten Kampar Provinsi Riau Stomach analysis of Belontia hasselti captured in the palm plantation canals at Terantang Village, Tambang Sub-Regency, Kampar Regency, Riau Province
    (2012-11-26) Azwar, Delpi
    A study aims to understand stomach analysis of Belontia hassellty present in the drainage canals of palm plantation in the Terantang Village has been conducted on February to April 2012. Fish samples were captured using bamboo fish trap, once/ week for a 4 month period. There were 123 fishes (102 males and 21 females) captured and TL is ranged from 52 to146 mm and BW ranged from 2 to 68 gr. Fish stomach was removed and stomach content was analyzed using volumetric, occurence frequency. Stomach content of fish is related to their size. In small fish (TL less than 135 mm), the main food is plankton. In the relatively bigger fish (TL more than 136 mm), the main food crustacean. Preponderance Index in the fish in general was chlorophyta 45.14%, cyanophyta 20.23%, basillariophyta 22.89%, crustacea 11.40%, rotifera 0,20%, and insecta 0.15%. based on data obtained, it can be concluded that Belontia hasseltii is omnivorous but it tend to be herbivorous.
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    ASPEK BIOLOGI REPRODUKSI IKAN SELINCA (Belontia hasselti) DI DESA TERANTANG KECAMATAN TAMBANG KABUPATEN KAMPAR PROVINSI RIAU (Reproductive Biological Aspect of Belontia hasselti in the Terantang Aquatic at Tambang, Kampar District, Riau Province)
    (2012-10-16) Simanjuntak, Esa F
    Belontia hasselti is belonged to Belontiade family and commonly inhabit in the flood area in the riverside in Riau. However, information on reproductive biology of this fish is rare. To understand the reproductive biological aspects of this fish, a research has been conducted on February-April 2012. There were 123 fishes (102 males and 21 females) captured and TL is ranged from 52 to146 mm and BW ranged from 2 to 68 gr. The sex ratio of male and female is 5:1. In each sampling time there were fishes with 1st, 2nd, 3rd and 4th maturity level. The Gonado Somatic Index (GSI) is arround 0.01-10.46 %. Fecundity is around 142-10,041 eggs. Relationship between fecundity and TL is weak (r=0.03), while the relationship between fecundity with BW and GW are strong, r=0.99 and r=0.99 respectively. The egg size less various, around 0.98-1.00mm in diameter. However, the maturity stages of eggs in the ovary is various. In the 1st maturity level, the eggs are non vitellogenic with 0.05-0.18mm in diameter. In the 2nd maturity stage, the eggs are bigger 0.15-0.44mm and several eggs are in early vitellogenic stage. In the 3rd maturity level, eggs diameter is arround 0.28-1.95mm and there were several vitellogenic eggs. In the 4th maturity level, most of eggg in the ovary are mature (fully vitellogenic), 0.3-0.5mm in diameter. However, in the ovary of the 4th maturity stage fish, there are many immature eggs. This evidence indicates that B. hasselti may be a “partial spawner” and may spawn their eggs throughout the year.