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MUSIM PEMIJAHAN DAN FEKUNDITAS IKAN SELAIS (Ompok hypophthalmus) DI RAWA BANJIRAN SUNGAI KAMPAR KIRI, RIAU

Jurnal Perikanan Universitas Gadjah Mada Vol 10, No 2 (2008)
Publisher : Universitas Gadjah Mada

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Abstract

The aim of this research was to know the reproductive biology of Ompok hypophthalmus included gonadal development stages and spawning season.The study was conducted from June to December 2006 in floodplain of Kampar Kiri River. Samplings were carried out monthly with purposive sampling method. Fish samples were cathed by gillnet, trapnet, hand line and long line. A total of 474 individuals were captured ranged 80-310 mm in total length and 2-143 g in weight. The female and male reached sexual maturity at 115 mm and 214 mm in total length respectively. The spawning season for this species ranges from June to December where a peak season found in October which examined based on variations in gonado somatic index (GSI) and the existence of mature male and females. The fecundity varied from 688-15180 eggs. The correlation coefficient between fecundity with total length and fecundity with weight were very weak. It lead to suggested that the coefficient cannot be used to predict O. hypophthalmus fecundity.

Kelimpahan Fitoplankton dan Perannya Sebagai Sumber Makanan Ikan di Teluk Pabean, Jawa Barat

JURNAL SUMBERDAYA AKUATIK INDOPASIFIK Volume 1, Number 2, November 2017
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Papua

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Abstract

Pabean Bay is an estuary that has the potential of natural resources for fisheries.  One of the organisms that has an important role here is phytoplankton. This study aims to analyze spatially and temporally the composition of phytoplankton abundance as fish food sources in Pabean Bay waters, West Java. Phytoplankton and physics-chemical parameters were taken monthly samples (June 2016-March 2017). Data analysis included the composition and abundance of phytoplankton, one-way variance analysis based on time and zone, the relation of physics-chemical parameters of aquatic to phytoplankton abundance, and phytoplankton used by fish as food. The abundance of phytoplankton differs on a monthly basis, but is not different in each zone. The phytoplankton found in the Pabean Bay is dominated by the Bacillariophyceae class. The dominant type of phytoplankton feeds from some of the captured fishes is Nitzschia and Pleurosigma from the Bacillariophyceae class.

KEBIASAAN MAKANAN DAN PERUBAHAN ONTOGENETIK MAKANAN IKAN BAJI-BAJI (Grammoplites scaber) DI PANTAI MAYANGAN, JAWA BARAT [Food habits and ontogenetic changes in the diet of the rough flathead Grammoplites scaber in Mayangan Coast, West Java]

Jurnal Iktiologi Indonesia Vol 9, No 1 (2009): Juni 2009
Publisher : Masyarakat Iktiologi Indonesia (MII )

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Abstract

The study on the food habits and ontogenetic changes in the diet of the rough flathead, Grammoplites scaber, in Mayangan Coast, West Java, was conducted in 12 months. The main objectives of the study were to analyze the food compotition and the changes of the food in relation to season and fish length. Samplings were done once in a month, using gillnet and beach seine. Total samples were 795 individuals and the range of total length was between 107-364 mm. Food analysis was determined by using index of preponderance. The result showed that the food of the rough flathead fish could be grouped into four groups. The groups are crustacea, pisces, cephalopod, and bivalve. This fish was crustacivore and the major foods were Portunus, Metapenaeus dan Penaeus. The main foods which were consumed varied each month. Along with the increasing of the fish size, there was a change of the main foods. Smaller fish tend to consume Penaeus; whereas the larger one tends to consume Portunus, Metapenaues and Saurida.

STUDI MAKANANI KAN TEMBANG, Sardinella fimbricita (PISCES:CLUPEIDAE) DI PERAIRAN MANGROVE PANTAIMAYANGAN, JAWABARAT [Study on Food habits of Fringescale Sardinella,Sardinellafimbriata in Mangrove Waters, Mayangan Coast, West Java]

Jurnal Iktiologi Indonesia Vol 2, No 1 (2002): Juni 2002
Publisher : Masyarakat Iktiologi Indonesia (MII )

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Abstract

Studi tentang makanan ikan tembang (Sardinella fimbriata) di perairan mangrove pantai Mayangan, Jawa Barat telah dilakukan dari bulan September sampai akhir Oktober 1999. Sampel ikan ditangkap dengan menggunakan jaring rampus, pukat cincin dan pukat pantai. Berdasarkan analisis jenis dan komposisi makanan (Index of Preponderance), jenis makanan yang paling banyak dikonsumsi pada sampling 1 adalah zooplankton jenis Euphasia sp dan pada sampling 11 dan III didominasi oleh Lauderia sp. Jenis makanan yang paling banyak dikonsumsi berubah berdasarkan waktu namun komposisi jenis makanan tidak berbeda.ABSTRACTThe study on food habits of Fringescale Sardinella, Sardinella fimbriata was conducted in mangrove waters of Mayangan coast in September until October 1999. Fish samples were collected by using monofilament gillnets, purse seine and beach seine. Based on stomach content analysis, on the first sampling found that the main food was Euphasia (zooplankton); on the second and third sampling, Sardinella’s main food was Lauderia sp (phytoplankton). The major food item of Sardinella fimbriata was change according to the time of sampling, but food composition wasn’t.

Komunitas ikan di Telaga Warna, Jawa Barat [Fish community in Telaga Warna, West Java]

Jurnal Iktiologi Indonesia Vol 10, No 2 (2010): Desember 2010
Publisher : Masyarakat Iktiologi Indonesia (MII )

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Abstract

The research aims to describe fish community in Telaga Warna, including species diversity and food web. Fish was sampled using cast net in three times at rainy season, inter season, and dry season in 2007. Physicochemical parameters were ex situ and in situ. Plankton was identified until genus. Fish samples were observed in laboratory. Water physicochemical support fishes living process in Telaga Warna. All fishes in Telaga Warna are non-native species. Almost of them is grouped as a plankton-feeder which eats on phytoplankton and zooplankton.AbstrakPenelitian bertujuan untuk memerikan komunitas ikan yang menghuni Telaga Warna, mencakup keanekaragaman ikan dan jejaring makanan. Pengambilan contoh ikan menggunakan jala yang dilaksanakan tiga kali pada musim penghujan, pancaroba, dan kemarau tahun 2007. Parameter fisikokimiawi diambil ex situ and in situ. Plankton diidentifikasi sampai tingkat genus. Ikan contoh dianalisis di laboratorium. Kualitas air mendukung kehidupan ikan di Telaga Warna. Semua jenis ikan bukan spesies asli. Hampir seluruh jenis ikan termasuk kelompok planktivora yang memakan fitoplankton dan zooplankton.

Iktiodiversitas di Perairan Teluk Bintuni, Papua Barat [Ichthyodiversity in Bintuni Bay, West Papua]

Jurnal Iktiologi Indonesia Vol 11, No 2 (2011): Desember 2011
Publisher : Masyarakat Iktiologi Indonesia (MII )

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Abstract

Research on ichythyodiversity was conducted in June and December 2007 in order to reveal fish diversity in Bintuni Bay, West Papua. A total of 106 fish species belonging to 46 families and 12 orders were captured by beam trawl, fyke-net, and trap in wet and dry seasons. Perciformes was dominant and all of niche habitat inhabited by fish. The diversity of fishes was related with mangrove ecosystem around the Bintuni Bay. Fish communities divided into seven groups according to bioecological category and the group of marine-estuarine species was dominant. Spatial and temporal distributions of fish were varying related to aquatic environmental heterogeneity. A hypothetical trophic web was built based upon the different types of food resources used by each group of fish. Complexity of food web shows that estuary of Bintuni Bay is the feeding ground for many fish species. AbstrakPenelitian iktiodiversitas di perairan Teluk Bintuni, Papua Barat dilakukan pada Juni dan Desember 2007 dengan tujuan menggungkap kekayaan spesies ikan di perairan tersebut. Total spesimen ikan yang tertangkap pada dua musim yang berbeda dengan alat tangkap jaring tarik, pukat tepi, dan perangkap adalah 106 spesies dari 46 famili dan 12 ordo. Spesies ikan ordo Perciformes mendominasi komunitas ikan. Semua relung habitat yang tersedia diisi oleh beragam jenis ikan. Besarnya keragaman ikan yang ditemukan tidak terlepas dari keberadaan ekosistem mangrove di sekitar teluk. Komunitas ikan dibagi dalam tujuh kelompok berdasarkan kategori biolekologik dan kelompok spesies yang dominan adalah spesies estuari-bahari (marine-estuarine species). Distribusi spasio-temporal ikan beragam terkait heterogenitas lingkungan perairan. Jaring trofik hipotetik yang dikembangkan berdasarkan jenis ikan yang ditemukan beserta kebiasaan makanannya memperlihatkan bahwa komunitas ikan memanfaatkan semua relung makanan yang tersedia. Kompleksitas jaring makanan ikan memperkuat hipotesis bahwa daerah estuari Teluk Bintuni bervegetasi mangrove merupakan lumbung makanan bagi banyak spesies ikan.

KEBIASAAN MAKANAN IKAN MOTAN, Thynnichthys thynnoides, Bleeker, 1852 DI RAWA BANJIRAN SUNGAI KAMPAR KIRI, RIAU [Food habits of Thynnichtys thynnoides Bleeker, 1852 in floodplain river of Kampar Kiri, Riau]

Jurnal Iktiologi Indonesia Vol 9, No 2 (2009): Desember 2009
Publisher : Masyarakat Iktiologi Indonesia (MII )

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Abstract

Study on the food habits of Thynnichthys thynnoides in the floodplain of Kampar Kiri River, Riau, was conducted from July to Desember 2006, using experimental gillnet and trap. The main objectives of the study were to analyze the food compotition of T. thynnoides from two areas (Mentulik and Simalinyang) and the changes of the food in relation to season. Total samples are 252 fishes, comprises 125 fishes from Mentulik and 127 fishes from Simalinyang. Food analysis was determined by using Index of Preponderance. The result showed that the main food of T. thynnoides both in Mentulik and Simalinyang was Bacillariophyceae. At Mentulik, the most common prey items were Cocconeis, Cyclotella, and Nitzschia; on the other hand at Simalinyang Cocconeis, Cyclotella, and Pleurotaenium more representative. The composition of food items varied monthly, especially at Simalinyang. T. thynnoides from Mentulik and Simalinyang has same trophic positions.

BIOLOGI REPRODUKSI DAN FAKTOR KONDISI IKAN ILAT-ILAT, Cynoglossus bilineatus (Lac. 1802) (PISCES: CYNOGLOSSIDAE) DI PERAIRAN PANTAI MAYANGAN JAWA BARAT

Jurnal Iktiologi Indonesia Vol 9, No 1 (2009): Juni 2009
Publisher : Masyarakat Iktiologi Indonesia (MII )

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Abstract

The reproductive biology and length-weight relationship of fourlined tonguesole, (Cynoglossus bilineatus Lacapede, 1802) were examined in the Mayangan Coast, West Java from May to November 2003. The objective research was describe some aspect reproductive such as sex ratio, spawning season, fecundity, and spawning type; and also describe length-weight relationship and condition factor. The total length (TL) of all observed specimens ranged from 80 to 369 mm. Sex ratio of males and females was 1.5:1. Fecundity of this species was estimated at between 2.323 and 225.557 eggs per individual. C. bilineatus is an asynchronous, partial spawner, with are spawning peaks in June and September (for males), July and October (for females). Negative allometric was established in the length-weight relationship (b=2.859). Condition was estimated at between 0.89 and 1.06 for males and 0.84-1.08 for females.

PERKEMBANGAN KEMATANGAN GONAD DAN TIPE PEMIJAHAN IKAN SELAIS (Ompok hypophthalmus) DI RAWA BANJIRAN SUNGAI KAMPAR KIRI, RIAU [Development of gonad maturity and spawning pattern of Ompok hypophthalmus in floodplain of Kampar Kiri River, Riau]

Jurnal Iktiologi Indonesia Vol 8, No 2 (2008): Desember 2008
Publisher : Masyarakat Iktiologi Indonesia (MII )

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Abstract

The main objective of the study was to determine gonad maturity development and spawning pattern of O. hypophthalmus in floodplain of Kampar Kiri River. Samples were collected from June to December 2006 on a monthly basis. Biological samples were collected from a total of 474 O. hypophthalmus of which 249. females and 224 males were confirmed by macroscopic and histological analysis. Five gonad maturity stages were described based on the macroscopic and histological analysis. The dynamics of oocyte development of O. hypophthalmus, indicated a synchronism of maturation. Oocyte diameter distribution suggested that this species could be grouped as total spawner and iteroparous species.

Iktiofauna ekosistem estuari Mayangan, Jawa Barat [Ichthyofauna of Mayangan estuary, West Java]

Jurnal Iktiologi Indonesia Vol 11, No 1 (2011): Juni 2011
Publisher : Masyarakat Iktiologi Indonesia (MII )

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Abstract

Estuaries areas are the complex ecosystem and provide habitat for aquatic organisms, particularly for fishes. A study was conducted to determine fish species diversity in Mayangan estuary, from December 2010 to May 2011. Sampling was conducted in the three zones, namely marine coastal, river mouth, and mangrove creek. Fish specimens were collected by gill net, trammel net, beach seine, and mini trawl. A total of 2,854 fishes consisted of 46 families and 105 species, and the most collected group of fish was Carangidae. Based on occupied habitat, the richest number of species was found in the marine coastal (61), followed by the river mouth (16), and mangrove creeks (1). Typically marine-estuarine and estuarine-freshwater forms were represented by 15 and 12 species, respectively. The presence of fish larvae and juvenile in species composition indicated that Mayangan estuary has the function as habitat for feeding, spawning, refuge, and nursery. AbstrakEstuari adalah ekosistem yang kompleks dan menyediakan habitat bagi beragam biota akuatik, khsususnya ikan. Penelitian dilakukan pada bulan Desember 2010 hingga Mei 2011 untuk menentukan keragaman spesies ikan di estuari Mayangan. Pengambilan contoh dilakukan di tiga zona, yaitu pantai terbuka, muara sungai, dan alur sungai berhutan mangrove (anak sungai). Spesimen ikan dikumpulkan dengan jaring rampus dan jaring blama (gill net), jaring belanak (trammel net), krakat (beach seine), dan jaring arad (mini trawl). Ikan yang terkumpul sebanyak 2.854 ekor yang terdiri atas 46 famili dan 105 spesies, dan famili dominan adalah Carangidae. Berdasarkan habitat yang didiami, spesies terbanyak ditemukan di pantai terbuka sebanyak 61 spesies, 16 spesies ditemukan di mulut sungai, 1 spesies di alur sungai berhutan mangrove. Ikan bertipe habitat di pantai terbuka dan muara sungai berjumlah 15 spesies, sedangkan di muara sungai dan anak sungai diwakili oleh 12 spesies. Keberadaan larva dan juwana ikan di estuari Mayangan sebagai bagian dari komposisi spesies menunjukkan peran fungsional estuari sebagai daerah pemijahan, pembesaran, perlindungan, dan lumbung makanan.