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Wyszukujesz frazę "Pangandaran District" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Macrozoobenthos Community Structure in Cijulang River Pangandaran District, West Java Province, Indonesia
    Autorzy:
    Indra, Indra
    Sahidin, Asep
    Andriani, Zahidah dan Yuli
    Powiązania:
    https://bibliotekanauki.pl/articles/1059440.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Bivalvia
    Cijulang River
    Community Structure
    Gastropoda
    Macrozoobenthos
    Neritidae
    Pangandaran District
    Thiaridae
    bioindicator
    Opis:
    Cijulang River, Pangandaran is a river that is used for agriculture, fisheries, industry, household activities and even as a tourist attraction. Macrozoobenthos is a bioindicator that can show changes in the quality of river waters due to these activities. The purpose of this study was to determine the macrozoobenthos community structure found on the Cijulang River, Pangandaran. The research method used is Purposive Sampling. The study was conducted at 4 stations along the Cijulang River from upstream to downstream in September - November 2018. The results of the research on the Cijulang River found 27 species of 5 classes included in 3 fillum namely Mollusca (23 species), Arthropoda (3 species) and Annelida (1 species). The value of macrozoobenthos density in the Cijulang River ranges from 29.7 - 416.3 ind/m2. Diversity index ranges from 1.48 - 2.24. The uniformity index ranges from 0.49 - 0.80. The range of water quality and substrate showed variations and dynamics that were still within the tolerance limits of macrozoobenthos life and water salinity is the main causes of variations in the macrozoobenthos community structure on the Cijulang River.
    Źródło:
    World Scientific News; 2019, 128, 2; 182-196
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure of Plankton Communities in Cijulang River Pangandaran District, West Java Province, Indonesia
    Autorzy:
    Sahidin, Asep
    Nurruhwati, Isni
    Riyantini, Indah
    Triandi, Muhamad
    Powiązania:
    https://bibliotekanauki.pl/articles/1077072.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Cijulang River
    cijulang
    community structure
    plankton
    Opis:
    A river is a water ecosystem that plays an important role in the hydrological cycle and functions as a catchment area for the surrounding area. One of the organisms inhabiting river waters is plankton. The purpose of this study was to determine and analyze the structure of the plankton community in the waters of the Cijulang River and to study the relationship between plankton abundance, as well as some physical-chemical parameters of the water. The study was conducted in January, February, and March 2018 on the Cijulang River, at 5 (five) stations with a purposive sampling method. Accordingly, 17 genera were found, from 7 phytoplankton classes consisting of 6 Bacillariophyceae genera, 1 Clorophyceae genera, 2 Cyanophyceae genera, 3 Zygnematophyceae genera, 2 Desmidiaceae genera, 1 Synurophyceae genera, and 2 Fragillariophyceae genera. Also found were 10 genera from 5 classes of zooplankton consisting of 4 genera Maxillopoda, 2 genera Branchiopoda, 1 genera Gastropoda on veliger fase, 1 genera Ostracoda, and 2 genera Copepoda. The abundance of phytoplankton obtained ranges from 11-57 cells / L, while the zooplankton ranges from 8 – 40 ind/L. The diversity index (H ') = 1.397 - 2.275 and dominance index (D) = 0.022 - 0.294. Physical-chemical parameters of the waters, respectively, were 22 °C - 31 °C, light intensity 47.5 cm - 254 cm, salinity 0 ppt - 20 ppt, and dissolved oxygen 6.2 mg / L - 13.4 mg / L. Ammonia concentration 0.03 - 0.08 mg / L. All stations had a phosphate value of less than 0.16 mg / L and a silicate concentration of 0.01 - 0.0581 mg / L.
    Źródło:
    World News of Natural Sciences; 2019, 23; 128-141
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selectivity of fishing gear for hairtail fish (Trichiurus lepturus Linnaeus, 1758) commodities in Pangandaran District, Indonesia
    Autorzy:
    Sienna, Yafi Ibnu
    Hasan, Zahidah
    Lili, Walim
    Dewanti, Lantun Paradhita
    Powiązania:
    https://bibliotekanauki.pl/articles/1075461.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Beach seines
    Gill nets
    Pangandaran
    Selectivity
    Trichiurus lepturus
    Opis:
    Hairtail fish (Trichiurus lepturus Linnaeus, 1758) are a major commodity of high economic value in Pangadaran. This study aims to determine the most selective fishing gear for hairtail fish commodities based on the frequency of hairtail fish length, the proportion of the main catch and by-catch in Pangandaran District. Data collected are primary and secondary data. Primary data consists of catch data and fish size length. The catch is obtained by collecting the results of landing fish with gill nets and beach seines. Fish size length data obtained through direct measurement when the fish is landed. Secondary data collected is data on capture fisheries production in Pangandaran District. Data analysis consisted of calculation of length size distribution and comparison of main and by-catches with fishing gears. The analysis was carried out with the help of Microsoft Excel software. The results of this study indicate that hairtail fish in Pangandaran District were captured using gill nets and beach seines. Based on the results of the research conducted on August 2018 until January 2019, it can be concluded that gill net fishing gears are more selective compared to beach seines based on several parameters observed, namely the length distribution and the proportion of main catch : by-catch. The results showed that the comparison of the length distribution of hairtail fish that was appropriately caught between gill nets and beach seines was 85.74% : 30,74%. Comparison of the proportion of main catch : by-catch between gill nets and beach seines was 52.38%: 23.57%.
    Źródło:
    World Scientific News; 2019, 126; 248-260
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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