ANALISIS KELIMPAHAN PLANKTON DAN PERTUMBUHAN
KERANG KEPAH Polymesoda erosa (Solander, 1786) YANG DIPELIHARA
PADA TAMBAK DI DELTA MAHAKAM

(Analysis of Plankton Abundance and Growth of Cultured Mud Clam in Mahakam Delta Pond)
 

SAMSUL RIZAL1) dan JAILANI 2)

1) Staf Pengajar Jurusan BDP-FPIK, Unmul
2) Staf Pengajar Jurusan MSP-FPIK, Unmul
Fakultas Perikanan dan Ilmu Kelautan Universitas Mulawarman
Jl.Gunung Tabur No.1 Kampus Gunung Kelua Samarinda
E-mail: rizal_akuakultur@yahoo.co.id

ABSTRACT

This research was aimed to analyze the relationship between plankton abundance and morfometric growth of Mud Clam (Polymesoda erosa). The study was located in an idle brackish water pond in Mahakam Delta, by culturing Polymesoda erosa in small scale. Grouping random design was applied for sampling. Treatment was divided into factor A and B. Factor A is related to shell size: size I (40 – 60,99 mm), II (61 – 80,99 mm) and size III (81 – 100 mm). Factor B is indicating to study location with vegetation (Rhizophora sp) and no vegetation. In order to analyze plankton abundance, a quantitative descriptive analysis was applied, in addition of ANOVA test to analyze the growth. The result indicated that between two study ponds is different. The number of plankton per liter water from vegetated pond has more plankton individual than the sample from non-vegetated pond. The applied treatment on study ponds and shell size determined the morfometric growth and biometric. The growth of shell length is faster than that on height and thickness. The growth of mud clam in vegetated ponds relatively better that the pond without vegetation.

Keywords: mud clam, Polymesoda erosa, plankton, and brackish water pond

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PEMETAAN DAN ANALISIS TINGKAT KERUSAKAN 

HUTAN MANGROVE DI TAMAN NASIONAL KUTAI 

BERDASARKAN DATA SATELIT LANDSAT ETM DAN KERAPATAN VEGETASI

(Mapping and deforestation level of mangrove forest in Kutai National Park base on data satelite image of landsat etm and vegetation density)

   

ANUGRAH ADITYA BUDIARSA1) dan SAMSUL RIZAL2)

1) Staf Pengajar Jurusan MSP-FPIK, Unmul

2) Staf Pengajar Jurusan BDP-FPIK, Unmul

Fakultas Perikanan dan Ilmu Kelautan Universitas Mulawarman

Jl.Gunung Tabur No.1 Kampus Gunung Kelua Samarinda

E-mail: aditarm83@gmail.com

ABSTRACT

Along with the increase in population in the Kutai National Park (Kutai NP) has raised the land issue of due to the need for living space and the exploitation of natural resources. This study is part of an effort to evaluate the condition of mangrove forests as a first step effort to protect mangrove forests as critical habitat for coastal Kutai NP. The research was conducted in March to April 2012, with the goal of evaluating and measuring vegetation cover and land use (Land use) mangrove forests in coastal Kutai NP. For this purpose the data is used Landsat ETM + image with 7 bands that recorded in 2008. Process analysis using NDVI (Normalizet Difference Vegetation Index) composite channel by IR (bands 4 and 3), while the extent of the damage was analyzed using standard from Decree of Ministry Of environment No. 201, 2004. Base on the research, Kutai National Park has the potential of ± 5192.54 ha of mangroves, mangrove forest ecological conditions in Kutai NP generally be in the grade is still good with vegetation density ranging between 967-1567 ind / ha, Kutai NP In some areas such as the Estuary Sangatta, bay and estuary Sangkima Lombok are areas that have experienced enough land conversion, overall mangrove forest that has been opened by ± 1845.85 ha or 26.2%. Mangrove forests are located close to residential vulnerable to land-use changes.

Keywords: mapping, mangrove, level of damage, Kutai National Park

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ANALISA HUBUNGAN PANJANG, TINGGI , TEBAL CANGKANG 

DENGAN BERAT TOTAL KERANG KEPAH  (Polymesoda erosa)

YANG DIPELIHARA PADA TAMBAK

 Samsul Rizal

Penelitian ini bertujuan untuk menganalisa (1) Hubungan panjang dengan tinggi cangkang, (2) Panjang dengan tebal cangkang, (3) Tinggi dengan tebal cangkang dan  (4) Hubungan panjang, tinggi, tebal cangkang dengan berat total kerang kepah yang dipelihara pada tambak bermangrove dan tambak tanpa mangrove. Analisa data untuk hubungan antar panjang, tinggi, tebal cangkang menggunakan persamaan regresi sedangkan hubungan panjang, tinggi, tebal cangkang dengan berat total kerang. Hasil penelitian menunjukkan pola hubungan antar panjang, tinggi, tebal cangkang sangat kuat. Hubungan pertumbuhan antar panjang, tinggi, tebal cangkang dengan berat total kerang menunjukkan sifat pertumbuhan allometrik negatif. Kerang Kepah yang di pelihara pada tambak bermangrove memiliki pola hubungan pertumbuhan yang lebih baik dibandingkan tambak tanpa mangrove.

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