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I. RACHMATIKA
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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POLA REPRODUKSI BEBERAPA JENIS CYPRINIDAE DI PERAIRAN LEBAK LEBUNG, LUBUK LAMPAN, SUMATERA SELATAN D.I. HARTOTO; SULASTRI SULASTRI; I. RACHMATIKA
BERITA BIOLOGI Vol 3, No 3 (1985)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v3i3.1358

Abstract

D.I. HARTOTO, SULASTRI & I. RACHMATIKA. 1985. Reproductive pattern of some Cyprinids species at Lebak Lebung flood plain area,Lubuk Lampan, South Sumatera. Berita Biologi 3(3): 128 - 135. -A study on reproductive characteristics of three Cyprinids species was conducted in Lubuk Lumpam; a floodplain area in South Sumatera during the early rainy season of 1981. A study of fecundity supported by other biological aspects was used as an approach to reveal the reproductive pattern. Analysis of the Osteochilus hasselti showed that the fish was an early and multiple spawner that strats to breed in a submerged vegetation habitat type before the peak of food abundance in the rainy season. All of the species could not be grouped as small brood spawners, including the least fecund fish Rasbora lateristriata that spawns late in its life span. Chela oxygasteroides showed a similar pattern to the two other species except that it was predicted to spawn during the time of food abundance. Based on Horn's diagram, recapitulation analysis on factors of reproductive strategy indicated that three Cyprinids could be grouped as r - strategist.
TUMPANG TINDIH "NICHE" IKAN DI MUARA CI SIIH DAN CI JARALANG SELAT SUNDA JAWA BARAT D.I. HARTOTO; N. TRISNANINGSIH; I. RACHMATIKA
BERITA BIOLOGI Vol 3, No 3 (1985)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v3i3.1347

Abstract

D.I. HARTOTO, N. TRISNANINGSIH & I.RACHMATIKA. 1985. Fish niche of Ci Siih and CiJaralang estuaries, Sunda strait, West Java. Berita Biologi 3 (3) : 77 - 83. - A study of the fish community of Ci Silih and Ci Jaralang estuaries, Sunda Strait, West Java was conducted during the peak of dry season, August 1982. This study was aimed to apply Hutchinsonian niche theory into operational level and to reveal the stage of succession processes on the two estuarine fish communities.The study shows that type of refuges were more variate in Ci Jaralang than in Ci Siih and diversity of physical structure of spatial habitat resources affected a more diverse type of refuges. Means of absolute spatial niche breadth as a measure of concentration (?i) and uncertainty(?i) are larger in Ci Siih than in Ci Jaralang.Those facts indicate that fish species in Ci Siih were more dispersed in occupying the spatial habitat resources available. The larger (?i) value indicate that these two fish communities were still in early stages in their succession. The significantly similar means of absolute spatial niche overlap shows that the intensity of resources sharing on these two communities are nearly similar and are quite intensive.
POLA MAKAN DAN REPRODUKSI IKAN TOR SPP. SEBAGAI DASAR BUDIDAYANYA SULASTRI SULASTRI; I. RACHMATIKA; D.I. HARTOTO
BERITA BIOLOGI Vol 3, No 3 (1985)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v3i3.1348

Abstract

SULASTRI, I. RACHMATIKA & D.I. HARTOTO. 1985. Feeding and reproductive patterns of Torspp. as a base for its aquaculture. Berita Biologi 3(3): 84 -90. A study on the feeding and reproductive characteristics of Tor spp. as a base for aquaculture was done in laboratory and field conditions. Qualitative observation on the feeding habits of Tor douronensis (C.V.) do not show a restriction of the main diet to autochthonous sources. Algae were the main diet, followed by detritus, insects, diatoms, plant material, mosquitoes larvae and desmids. Laboratory observations show that T. douronensis eat first the food that is most concentrated, followed by the food that floats on the surface and last, foods on the bottom. Spearman Rank Correlation reveals that there was food overlaps between groups of fishes of different maturity stages from species collected in the field. It was found that there was a morphological change of male T. soro and a decrease of condition factors that were correlated with the increase of maturity stage. Vision as a significant factor affecting feeding and reproduction of Tor spp. and its relation to aquaculture application was discussed.
Co-Authors D.I. HARTOTO N. TRISNANINGSIH Sulastri Sulastri