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DISTRIBUSI SPASIAL DAN TEMPORAL IKAN PEPIJA Harpadon nehereus (Hamilton, 1822) DI PERAIRAN PULAU TARAKAN, KALIMANTAN UTARA Laga, Asbar; Affandi, Ridwan; Muchsin, Ismudi; Kamal, Muhammad Mukhlis
ZOO INDONESIA Vol 24, No 1 (2015): Juli 2015
Publisher : Masyarakat Zoologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1053.083 KB)

Abstract

Ikan pepija merupakan ikan demersal dengan penyebaran di perairan estuaria dan laut dangkal. Penelitian ini bertujuan untuk mengkaji distribusi spasial dan temporal ikan pepija di perairan P. Tarakan. Penelitian dilakukan dari Februari 2013 sampai dengan Februari 2014. Penangkapan ikan dilakukan dengan menggunakan pukat hela (trawl) dengan ukuran panjang sayap 7 meter dengan besar mata jaring pada sayap, badan dan kantong masing-masing berukuran 2,2 dan 1 inch. Pengoperasian jaring trawl pada masing-masing lokasi stasiun dilakukan “zig zag” dengan 2 kali masa penarikan pukat hela (towing) selama 30 menit. Ikan yang tertangkap ditimbang seluruhnya. Hasil tangkapan bervariasi saat waktu pengamatan dan antara satu stasiun dengan stasiun lainnya. Laju tangkap tertinggi pada bulan Desember dan Januari sebesar 75.56 dan 77.37 kg/jam dan terendah pada bulan April sebesar 7.41 kg/jam. Ikan pepija melakukan migrasi harian dari Tanjung Simaya (tanggal 7 kalender Hijriah), tanggal 8 di perairan Tanjung Selayu, tanggal 9 antara perairan Tanjung Selayu dan Tanjung Juata, dan tanggal 10 pada penanggalan Hijriah di perairan Tanjung Juata. Berdasarkan data tangkapan tersebut terungkap bahwa distribusi ikan pepija di perairan Pulau Tarakan berkaitan dengan pasang surut, ikan ini hanya ditemukan pada saat pasang perbani pada tanggal 7, 8, 9 dan 10 bulan Hijriah.
STUDI PARAMETER OSEANOGRAFI FISIK PERAIRAN PULAU DERAWAN Roem, Muhamad; Laga, Asbar; Listina, Ika; Rukmana, Indrawati; Astriani, Kiki
Jurnal Harpodon Borneo Vol 9, No 2 (2016): Volume 9 No 2 Oktober 2016
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1070.761 KB) | DOI: 10.35334/harpodon.v9i2.171

Abstract

A study on waves, tides and tidal currents has been done to understanding the oceanography characters  of  Derawan Island.  Wave  modeling done  by the approach hindcasting methods. Derawan tidal was analyzed with admiralty method to determine the tidal constituent. Tidal currents has been studied with the plot stick approach. In general, our results show that the largest waves probability come from the northeast with a wave height between 1-4 m. Derawan tidal type are mixed with the meanseal level values at 224 cm. Key words : Derawan, Oseanography, Wave, Tidal Current.
PERUBAHAN ONTOGENETIK MAKANAN IKAN DI ESTUARI Laga, Asbar
Jurnal Harpodon Borneo Vol 5, No 2 (2012): Volume 5 No 2 Oktober 2012
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (499.888 KB) | DOI: 10.35334/harpodon.v5i2.94

Abstract

Kehadiran dan keberadaan organisme atau biota pada  suatu habitat  atau perairan disebabkan oleh ketersedian makanan dan lingkungan yang mendukung.  Perubahan-perubahan lingkungan yang terjadi direspon oleh biota atau ikan dengan berbagai cara adaptasi.  Bentuk adaptasi ini dapat berupa perubahan pola makan atau jenis makanan yang dikonsumsi.  Umumnya, panjang ikan meningkat, jumlah taksa mangsa ditemukan dalam perut mereka meningkat peningkatan Diet ikan tidak hanya berubah dalam keragaman mangsa yang dikonsumsi ikan dalam ukuran, mereka juga berubah sehubungan dengan volume dan ukuran keragaman mangsa, lebar badan mangsa umumnya meningkat dengan meningkatnya panjang predator.  Pergeseran ontogenetic tampaknya terjadi dalam diet mulai dari post larva ke tahap juvenil dan ikan dewasa yang dipengaruhi oleh pertumbuhan, musim dan habitat.  Kata Kunci:  makanan, pertumbuhan, habitat, juvenile, dewasa
KOMPOSISI HASIL TANGKAPAN PERIKANAN TUGU DI PERAIRAN KOTA TARAKAN Rizal, Agus; Laga, Asbar
Jurnal Harpodon Borneo Vol 5, No 1 (2012): Volume 5 No 1 April 2012
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (306.602 KB) | DOI: 10.35334/harpodon.v5i1.85

Abstract

Tugu fishing gear is one type of fishing gear in the city of Tarakan. Tugu fishing gear is highly dependent on the tides (tidal trap). In specification-pillar dimension of fishing gear catches indicated that generated diverse in type and size. This study aims to determine the types of fisheries catches the trap and the composition of fishery catches the existing tugu in the town of Tarakan. samples are taken from three stations, among others; station 1 is located in The Village Mamburungan precisely in Cape sand, station2 and station 3 is located in The Village Beach charity. Total catch weight of 12 528 heads with 54.2 Kg. The identification results obtained during the investigation of 34 species from six groups of  species of marine life. Highest composition based on the number during the experiment shows in a row is a freckle-pink shrimp (Metapenaeus sp)  amounted  to  49.79%.,  And  the  lowest  was  Goldstripe  sardinella  (sardinella Fimbriata), chacunda gizzard (dorosoma chacunda), giant catfish (Arius thalassinus), yellowpike (Congresox talabon), Halibut (psettodes erumei), mackerel (Scomberomorus guttatus), and sea snake (Enhydrina Schistosa) 0.01% respectively.  Keywords: composition, fishery catches trapt, and the City of Tarakan
KAJIAN POTENSI BUDIDAYA RUMPUT LAUT DI PERAIRAN PULAU BUNYU MELALUI PENDEKATAN HIDRO-OCEANOGRAFI DAN SISTEM INFORMASI GEOGRAFI Cahyadi, Jimmy; Laga, Asbar; Noor, Mas Apriyan
Jurnal Harpodon Borneo Vol 3, No 1 (2010): Volume 3 No. 1 April 2010
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (485.582 KB) | DOI: 10.35334/harpodon.v3i1.442

Abstract

The purpose of this research is to study potential sea weed cultivation at island waters bunyu by hidro-oceanografi and geography information system.  Location of this research on marine culture development zone plan waters (RDTR) island bunyu, Regency bulungan, East Kalimantan, where geographically in 3°24'46" -3°24'46" latitude and 117°47'3" -118°00'00" Longitude.  This research are literature review,  ground check, Observation and Interview.  The research that used method survey and qualitative.  The stage is preced with identify condition hidro-oceanografi that measuresed according to insitu as primary data.  Then identification accessibility as secondary data.  Identification result further more at analysis based on weighted  sea weed cultivation location with matrix.  Analysis result above then analyzed furthermore by using method skoring and Geographical information system to produces map tematik new.  Percentage turn result as result skoring from location suitable evaluation system evaluation for sea weed cultivation (eucheuma cottonii) show in four locations moderate suitable and One location marginal suitable Keywords: Sea weed, Hidro-oceanografi, Geographical information system
STRUKTUR KOMUNITAS PADANG LAMUN PULAU DERAWAN Roem, Muhamad; Laga, Asbar
Jurnal Harpodon Borneo Vol 7, No 2 (2014): Volume 7 No 2 Oktober 2014
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.635 KB) | DOI: 10.35334/harpodon.v7i2.115

Abstract

The aim of the research is to analize community structure derawan seagrass meadow. The research conducted in seagrass meadows of Derawan Island, East Kalimantan Province. The research method was ecological survey. Immensity and condition of the meadows were describe in decriptive analysis. The result of the research indicated that the ± 35 Ha seagrass of Derawan was dominated by H. Uninervis that made up to 86 % contribution to total relative density. H. Uninervis with average density 3.576 ± 115 ind m-2. Long term implication that confirmed this signs is the shifting in species composition for the last 18 years. There is an urgent of doing sea grass ecosystem rehabilitation to maintain the ecological sustainability of sea grass meadows as a habitat and sustainability of green sea turtle population as ecosystem user. Keywords : seagrass meadows, foraging habitat, green seaturtle, species shifting,  ecological sustainability.
MAKROZOOBENTHOS PADA KAWASAN KONSERVASI MANGROVE MAMBURUNGAN KOTA TARAKAN Laga, Asbar; Firdaus, Muhammad; Agustina, Agustina
Jurnal Harpodon Borneo Vol 3, No 1 (2010): Volume 3 No. 1 April 2010
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (221.26 KB) | DOI: 10.35334/harpodon.v3i1.434

Abstract

Mangrove forest in mamburungan conservation area is uniqe ecosystem, its have much biodiversity in flora and fauna. In the presence biota water especially makrozoobenthos has to big play a part in ecosystem balance. The Purpose of this  research know makrozoobenthos's relationship picture to in the presence area mangrove ecological. The research found that on four sasiun researces are 263 consisting of species 163 specieses of Gastropoda's classes, 50 specieses of Bivalva's classes, 29 specieses of Polychaetha's classes, and 21 specieses of Crustacea's classes. Variety index point (H’) one that acquired ranging among 1,60 – 2,11. Coronet density correlation adjures with found makrozoobenthos existence on Mangrove Mamburungan's conservation area is gotten assesses r s  0,6. It means to exist relationship among coronet density adjures with makrozoobenthos's existence, but don't happen perfect relationship. Key word:   Makrozoobenthos, Correlation / Relationship, Mangrove .
PERBEDAAN SUBSTRAT DAN DISTRIBUSI JENIS MANGROVE (STUDI KASUS : HUTAN MANGROVE DI KOTA TARAKAN) Indah, Rosaria; Jabarsyah, Abdul; Laga, Asbar
Jurnal Harpodon Borneo Vol 3, No 1 (2010): Volume 3 No. 1 April 2010
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.538 KB) | DOI: 10.35334/harpodon.v3i1.440

Abstract

The purpose of this research are to know tpe of soil pursuant to type of mangrove, to know correlation of soil to species composition distribution of mangrove.  Benefit of this research are to give information regarding how far plant of mangrove in region coastal area of Tarakan city can grow at certain substrat.  To government of Tarakan city as supporter information regarding readyly seed stok of mangrove needed to area of mangrove matching with place growing.  Equiping researchs which have there and as reference to researchers here in after to do research concerning mangrove.  The result of this research are distribution type of mangrove for Sonneratia sp in area of forest mangrove in Old Amal Beach 100% known to have type of soil dominant sand with its mean proportion of its, sandy 96,00%, silt 2,37%, clay 0,31%. Distribution of Rhizopora sp in area of forest mangrove Gusher 90,16% known to have type of soil dominant sandy clay with its mean proportion of its, sandy 87,03%, silt 10,8%, clay 2,09%.  Distribution of Bruguiera sp in area of forest mangrove Gusher 47,77% known to have type of soil dominant sand with its mean proportion of its, sandy 93,73%, silt 5,19%, clay 0,46%. Its correlation for the type of Avicennia sp, Sonneratia sp, and Bruguiera sp show happened relation but donot so sliver. While Rhizopora sp show happened relation so sliver. Keywords : Soil, distribution type of mangrove, Correlation.