scholarly journals Growth Pattern of Skipjack Tuna (Katsuwonus Pelamis) Landed in PPI Kedonganan Bali

2019 ◽  
Vol 5 (2) ◽  
pp. 211
Author(s):  
I Gusti Ayu Febiana Putri Wardeni ◽  
Pande Gde Sasmita Julyantoro ◽  
Rani Ekawaty
Keyword(s):  
Growth Pattern ◽  
Growth Parameters ◽  
Small Body ◽  
Economic Value ◽  
Simple Random Sampling ◽  
Management Plan ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Frequency Distributions ◽  
Weight Growth

Skipjack Tuna (Katsuwonus Pelamis) is one of the big pelagic fish in fishery resources that has high economic value and plays an important role in export activity in Indonesia. Catch activities for consumption needs for people could threatened of Skipjack Tuna availability. The growth pattern of Skipjack Tuna is needed to used as references for the appropriate management plan to protect Skipjack Tuna. The research was conducted from February to April 2017 at PPI Kedonganan, Kuta District, Badung, Bali. The fish were collected by simple random sampling method. This study showed that gillnet and handline were used as fishing gears. The length frequency distributions were in the long-range of 315-337 mm means the catch fish is still young. The growth pattern of Skipjack Tuna was negative allometric means length growth was faster than weight growth. The growth parameters of Skipjack Tuna were obtained by the asymptotic length (Linf) of 875.2 mm, growth coefficient (K) of 0.09, and theoretical age (t0) of -0.78. Skipjack Tuna have small body size with condition factors were ranged from 0.8783-1.7269. It can be concluded that these methods can be used to determine the appropriate management efforts.

scholarly journals Research of parasites with zoonotic potential for humans in skipjack tuna (Katsuwonus pelamis)

2021 ◽  
Vol 17 (8) ◽  
Author(s):  
Clarissa Maia de Aquino ◽  
Gracienhe Gomes dos Santos ◽  
Maur´ício Laterça Martins ◽  
Vildes Maria Scussel
Keyword(s):  
Economic Value ◽  
International Markets ◽  
Mechanical Action ◽  
Fish Parasites ◽  
Zoonotic Potential ◽  
Skipjack Tuna ◽  
Internal Organs ◽  
Katsuwonus Pelamis ◽  
Tropical Waters ◽  
Zoonotic Parasites

The skipjack tuna (Katsuwonus pelamis) is commonly found in the tropical waters of the oceans. It is a fishing resource of high economic value and available for national and international markets. Therefore, it is important to know the fish parasites for a correct sanitary inspection, as the pathogenesis in humans can occur through spoliative, toxic or mechanical action. This study aimed to identify the zoonotic parasitic fauna that infects the beautiful-striped using morphological methods. A total of 06 samples were analyzed. The fish were necropsied for parasitological evaluation of the musculature and internal organs. The samples were visually inspected and the structures with morphology combining with parasitic shapes were analyzed both in stereoscopic and microscope. The parasites found were fixed in 70% alcohol for later identification. All samples showed the presence of zoonotic parasites for humans. Two genera of zoonotic parasites have been found for humans that have beautiful tuna as their hosts, namely Anisakis sp. (Nematoda) and Trypanorhyncha (Eucestoda). A 100% of the infections occurred in the muscles and 66.6% in the liver. The results reinforced the importance of inspection by responsible organisms on the importance of evisceration as quickly as possible to avoid migration of larvae to the muscle.

scholarly journals STATUS KEBERLANJUTAN PERIKANAN HUHATE BERDASARKAN ASPEK BIOLOGI DI PPI DUFA-DUFA KOTA TERNATE

1970 ◽  
Vol 10 (1) ◽  
pp. 117-116
Author(s):  
Irham . ◽  
Amirul Karman ◽  
Kusdi Hi Iksan
Keyword(s):  
Size Structure ◽  
Economic Value ◽  
Fork Length ◽  
Pelagic Fish ◽  
Fishing Ground ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Strategic Location ◽  
Catch Composition ◽  
Fish Aggregating Devices

ABSTRACTTernate Island lies in a strategic location as it is situated in the middle of  the main fishing ground for skipjack (Katsuwonus pelamis) fishing using pole and line (huhate) and fish aggregating devices (FADs). As typical pelagic fish, skipjack that is gathered near the water surface is the younger fish, likewise the ones which are caught around FADs. Therefore, this fishing method has caused serious problem due to the domination of young fish and increasing bycatch and discard. The objective of this research is to analyze the size structure of the fork length, appropriate size for catching, catch composition, bycatch and discard level. Pole and line catch samples were collected in 3 months fromMay to July 2018. The results show that in average, skipjack tuna caught in the study location was undersize. The total catch is predominantly targeted fish which has a higher economic value compared to bycatch and discarded fish. Even though bycatch in the pole and line fisheries are low, reduction efforts are still required. which can be done by sorting bycatch and unwanted fish then discard it into the sea when the fish is still alive.Keywords: biology, pole and line, sustainability status, Ternate City ABSTRAKPosisi Pulau Ternate sangat strategis karena berada di tengah perairan yang menjadi daerah operasi penangkapan cakalang (Katsuwonus pelamis) dengan alat tangkap huhate (pole and line) yang dibantu dengan penggunaan rumpon. Sebagaimana ikan pelagis lainnya,  ikan-ikan cakalang yang berkumpul di lapisan permukaan air cenderung tergolong ikan-ikan muda. Oleh karena itu, cakalang yang tertangkap di sekitar rumpon juga cenderung ikan-ikan yang masih muda. Fenomena ini menyebabkan munculnya sebuah masalah besar, yaitu dominasi ikan-ikan muda, selain itu juga sering tertangkap ikan yang bukan target tangkap yang terdiri dari bycatch dan discards. Tujuan dari penelitian ini adalah menganalisis struktur ukuran panjang cagak dan ukuran cakalang layak tangkap, komposisi hasil tangkapan, persentase bycatch dan discards. Sampel hasil tangkapan huhate dikumpulkan selama 3 bulan (Mei sampai Juli 2018). Hasil penelitian menunjukkan bahwa rataan cakalang di lokasi penelitian didominasi ukuran belum layak tangkap. Total hasil tangkapan didominasi ikan target, sementara itu bycatch yang tertangkap memiliki nilai ekonomis yang baik dan tidak ditemukan discards. Walaupun bycatch pada perikanan huhate rendah namun usaha-usaha untuk meminimumkan tetap perlu dilakukan. Salah satu usaha yang bisa dilakukan adalah menyortir hasil tangkapan, ada apabila ada ikan yang akan dibuang ke laut, dilakukan dalam keadaan masih hidup.Kata Kunci: Biologi, huhate (pole and line), status keberlanjutan, Kota Ternate

scholarly journals ESTIMASI PARAMETER POPULASI IKAN CAKALANG (Katsuwonus pelamis, Linnaeus, 1758) DI PERAIRAN SAMUDRA HINDIA

2018 ◽  
Vol 9 (3) ◽  
pp. 163
Author(s):  
Raymon Rahmanov Zedta ◽  
Prawira Atmaja Rintar PT ◽  
Dian Novianto Novianto
Keyword(s):  
Fisheries Management ◽  
Growth Parameters ◽  
Total Mortality ◽  
Skipjack Tuna ◽  
Population Parameters ◽  
Katsuwonus Pelamis ◽  
K Value ◽  
Fish Samples ◽  
Management Area ◽  
Tuna Fisheries

Penelitian ini bertujuan untuk mengkaji parameter populasi ikan cakalang (Katsuwonus pelamis) yang tertangkap pukat cincin di WPP-572 Samudra Hindia Barat Sumatera dan WPP-573 Selatan Jawa. Hasil penelitian ini diharapkan dapat digunakan sebagai masukan dalam penentuan pengelolaan perikanan sehingga stok ikan cakalang dapat dimanfaatkan secara berkelanjutan. Ikan contoh dikumpulkan melalui program enumerasi tahun 2016 (Januari-Desember). Sampling acak dilaksanakan di empat pelabuhan, yaitu PPS Lampulo (Aceh), PPN Sibolga (Sumatra Utara), PPP Tamperan (Pacitan) dan IPP Pondokdadap (Malang). Jumlah ikan contoh diperoleh sebanyak 14.894 ekor. Serial data fekuensi panjang bulanan diolah menggunakan program FiSAT II untuk menduga parameter pertumbuhan, mortalitas dan tingkat eksploitasi. Hasil penelitian menunjukkan ikan cakalang yang tertangkap di WPP-572 memiliki panjang asimtotik (L)73,5 cmFL, K sebesar 0.22/tahun dan to sebesar -0,59 tahun. Parameter populasi di WPP-573 berturut-turut L”=67,20 cmFL, K=0,27/tahun, dan to=-0,50 tahun. Nilai mortalitas alami (M) ikan cakalang di WPP 572 sebesar 0,49/tahun, mortalitas total (Z) 0,70/tahun, dan kematian akibat penangkapan (F) adalah 0,21/tahun. Ikan cakalang yang tertangkap di WPP 573 menunjukkan nilai (E) sebesar 0,59/tahun, nilai Z 1,02/tahun, dan nilai F sebesar 0,43/tahun. Dugaan tingkat eksploitasi ikan cakalang di WPP 572 dan 573 masing-masing 0,3/tahun dan 0,42/tahun atau belum berada pada tahap optimal.This study aimed to assess the population parameters of skipjack tuna (Katsuwonus pelamis) that caught by purse seine in the Indonesian FMA (Fisheries Management Area) 572 Indian Ocean West Sumatera and FMA 573 South Java. The outcomes of this research can hopefully be used as inputs for fisheries management, in order the stock of skipjack tuna can be utilized sustainably. Fish sample were collected through the program enumeration of Research Institute for Tuna Fisheries (RITF) during the year 2016 (Januari-Desember). Using random sampling method at four fishing ports, namely PPS Lampulo (Aceh), PPN Sibolga (North Sumatra), PPP Tamperan (Pacitan), and IPP Pondokdadap (Malang). The total number of fish samples was 14.894 fish. Monthly length frequency data processed using FiSAT II program to estimate the growth parameters, mortality, and exploitation. The analysis results showed that skipjack tuna caught in FMA 572 has asymtotic length value (L) at 73.5 cmFL, K value 0.22/year, and to at -0.59 year; while in FMA 573 population parameters values respectively 67.20 cmFL, 0.27/year, and -0.50 year. The value of natural mortality (M) skipjack in FMA 572 is 0.49/year, total mortality (Z) 0.70/year, and fishing mortality (F) 0.21/year. Skipjack tuna that caught in FMA 573 showed value of M 0.59/year, Z value 1.02/year, and F value 0.43/year. The estimated values of exploitation levels of skipjack in FMA 572 and 573 were 0.3/year and 0.42/year respectively.

scholarly journals Pola Pertumbuhan Ikan Pari Kemejan (Rhynchobatus springeri) yang Didaratkan di Kubu Raya, Kalimantan Barat

2021 ◽  
Vol 1 (1) ◽  
pp. 29-35
Author(s):  
Fitra Wira Hadinata Hadinata ◽  
Sri Rahayu ◽  
Fitri Nurleha ◽  
Kezia Gloria A.R. ◽  
Benaya M.S.
Keyword(s):  
Growth Pattern ◽  
Economic Value ◽  
B Value ◽  
Female Fish ◽  
Male And Female ◽  
West Kalimantan ◽  
Length Growth ◽  
Weight Growth ◽  
A Value ◽  
Relationship Of

The whitespotted guitarfish (Rhyncobatus Springeri) resource is an important commodity and has high economic value. This study aims to determine the growth pattern of whitespotted guitarfish landed in the PPI Sungai Kakap. This research was conducted at the PPI Sungai Kakap, Sungai Kakap District, Kubu Raya Regency, West Kalimantan Province in July and August 2019. Data was collected by observation, surveys, and interviews. Data analysis of sex ratios, length, and weight was carried out on samples of whitespotted guitarfish. The results of the analysis of the sex ratio of male and female whitespotted guitarfish were 1.00:1.44, this shows that the number of male fish caught is relatively equal to the number of female fish caught. The results of the analysis of the length and weight relationship of whitespotted guitarfish, the a value is 20.643 and the b value is 0.6770. That value represents a negative allometric growth pattern for male and female fish. The negative allometrics explain that the length growth is faster than the weight growth. Generally, the increase of the length and weight is equal, but the whitespotted guitarfish has length growth faster than weight growth

scholarly journals Pemanfaatan Data Biologi Ikan Cakalang (Katsuwonus pelamis) dalam Rangka Pengelolaan Perikanan Bertanggung Jawab di Perairan Teluk Bone

2012 ◽  
Vol 14 (1) ◽  
pp. 107 ◽  
Author(s):  
Muhammad Jamal ◽  
Muhammad Fedi Alfiadi Sondita ◽  
John Haluan ◽  
Budy Wiryawan
Keyword(s):  
Growth Model ◽  
Fisheries Management ◽  
Growth Pattern ◽  
Fork Length ◽  
Biological Characteristics ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Management Zone ◽  
Weight Relationship ◽  
First Maturity

The Bone Bay is part of Fisheries Management Zone WPPI 713 that covers Makassar strait, Flores sea and Bali sea. To such vast marinearea, fisheries management can be started from smaller region, e.g. embayment waters. Biological characteristics of skipjack tuna (Katsuwonuspelamis) are some of important information for developing fisheries management in the area. This research was aimed to determine length-weight relationship, size composititon, growth pattern and biologically feasible size of the fish. Data were obtained from fish caught byfisherman from Januari to December 2007. The bay was divided into three study areas, i.e. Northern, Centre and Southern Zones. The bcoefficients for length-weight relationship in the three zones were equal 3 [not significant]. The average fork-length (FL) in each zoneshowed similar trends: increased from January to June, then stabilized until December. Using von Bertalanffy’s growth model, the maximumFL (L ∞ of 759.75 mm is estimated for fish at age of 84 months. The length at first maturity of the fish is 465 mm (FL).

scholarly journals UJI MUTU IKAN CAKALANG (Katsuwonus pelamis-L) DAN IKAN TONGKOL (Euthynnus affinis) SEGAR DI TPI TUMUMPA SELAMA PENYIMPANAN DINGIN

2017 ◽  
Vol 5 (2) ◽  
pp. 40 ◽  
Author(s):  
Desta Ekasari ◽  
I Ketut Suwetja ◽  
Lita ADY Montolalu
Keyword(s):  
Storage Time ◽  
Economic Value ◽  
Skipjack Tuna ◽  
Storage Duration ◽  
Katsuwonus Pelamis ◽  
Value Analysis ◽  
N Value ◽  
Testing Procedures ◽  
Euthynnus Affinis

The skipjack tuna (Katsuwonus pelamis-L) or the locally known as Cakalang and the mackerel tuna (Euthynnus affinis) or tongkol as it known locally are the types of fishes that have high economic value. The aim of this research is to observe the decrease in freshness quality of the skipjack tuna and the mackerel tuna that have been stored for 14 days in a cool box with the temperature of 0–5ºC, with the supporting data based on The TVB-N analysis, organoleptic analysis and Miogobin value analysis. The results using the three testing procedures which are consists of TVB-N value, organoleptic value and Mioglobin value, indicated that the meat of the mackarel tuna have more faster rate of degradation than the skipjack tuna. Data from the result of TVB-N anova calculation proved that the type of fish have no influence on the TVB-N value, while the storage duration are very influential the TVB-N value. In data of organoleptic value the general impression of skipjack tuna and the mackerel tuna obtained from the anova calculated imply that the type of fish influence the appearance and texture but not with the eyes gills and odour . While the treatment of storage time are impacted greatly on the appearance, texture as well as gills and odour. Keyword: TVB-N, Organoleptic, Mioglobin.   Ikan cakalang(Katsuwonus pelamis-L) dan ikan tongkol (Euthynnus affinis) merupakan salah satu jenis ikan yang mempunyai nilai ekonomi tinggi. Tujuan penelitian ini yakni untuk melihat kemunduran mutu kesegaran ikan cakalang dan ikan tongkol yang disimpan selama 14 hari dengan suhu 0–5ºC di cool box. Metode yang digunakan yaitu analisa TVB-N, analisa organoleptik dan analisa nilai Miogobin sebagai pendukung. Hasil analisa dengan tiga metode uji yaitu nilai TVB-N, nilai organoleptik dan nilai mioglobin, semuanya mengatakan bahwa daging ikan tongkol lebih cepat terdegradasi dibandingkan dengan ikan cakalang. Data hasil perhitungan anova TVB-N menyatakan bahwa jenis ikan tidak mempengaruhi kadar TVB-N sedangkan waktu lama penyimpanan sangat mempengaruhi tingkat kadar TVBN. Pada data nilai organoleptik kesan umum ikan cakalang dan ikan tongkol pada hasil perhitungan anova didapatkan jenis ikan mempengaruhi kenampakan dan tekstur tetapi tidak untuk mata, insang dan bau Sedangkan untuk perlakuan lama penyimpanan sangat mempengaruhi pada kenampakan, tekstur, insang, mata dan bau. Kata Kunci: TVB-N, Organoleptik, Mioglobin.

scholarly journals Variability of the growth parameters of the skipjack tuna (Katsuwonus pelamis) among areas in the eastern Atlantic: analysis from tagging data within a meta-analysis approach

2008 ◽  
Vol 21 (4) ◽  
pp. 349-356 ◽  
Author(s):  
Daniel Gaertner ◽  
Alicia Delgado de Molina ◽  
Javier Ariz ◽  
Renaud Pianet ◽  
Jean Pierre Hallier
Keyword(s):  
Growth Parameters ◽  
Meta Analysis ◽  
Analysis Approach ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis

scholarly journals KAJIAN MUTU IKAN CAKALANG (Katsuwonus pelamis L) ASAP TERHADAP NILAI KADAR AIR DAN pH SELAMA PENYIMPANAN

2017 ◽  
Vol 5 (2) ◽  
pp. 64 ◽  
Author(s):  
Steven Tumonda ◽  
Hanny Welly Mewengkang ◽  
Semuel Marthen Timbowo
Keyword(s):  
Moisture Content ◽  
Room Temperature ◽  
Ph Value ◽  
Economic Value ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Traditional Markets ◽  
Smoked Fish ◽  
North Sulawesi

Skipjack tuna (Katsuwonus pelamis L.) has a high economic value, both as an export commodity and for local consumption. In Indonesia, especially in North Sulawesi the total catch of skipjack tuna is high. The purpose of this research was to determine the quality of the skipjack tuna sold in two traditional markets, namely (A) Pasar Pinasungkulan Karombasan and (B) Pasar Bersehati, Manado. The moisture content of skipjack tuna sold in the market (B) does not meet the SNI quality requirement (max 60% moisture content of smoked fish). The pH value of the skipjack tuna  in market A and B still meets the quality requirements during storage in room temperature. Based on the results of moisture content and pH value, it can be concluded that the skipjack tuna purchased from Market A was still good for consumption up to 2 days storage in room temperature whereas fish from market B was not safe for consumption. Ikan cakalang (Katsuwonus pelamis L) mempunyai nilai ekonomis tinggi, baik sebagai komoditi ekspor maupun konsumsi  lokal. Di Indonesia khususnya perairan Sulawesi utara produksi ikan cakalang termasuk tinggi. Tujuan dari penelitian ini adalah untuk mengetahui mutu dari ikan cakalang asap yang dijual di dua pasar tradisional, yaitu (A) Pasar Pinasungkulan Karombasan dan (B) Pasar Bersehati, Manado. Kadar air ikan cakalang asap yang dijual di pasar (B) tidak memenuhi syarat mutu SNI, yaitu 60% kadar air untuk ikan asap. Nilai pH ikan cakalang asap yang dijual di pasar A dan B selama penyimpanan suhu ruang masih memenuhi syarat mutu ikan ikan asap. Dari hasil penentuan kadar air dan nilai pH serta data yang diperoleh pada penelitian ini, dapat disimpulkan bahwa ikan cakalang asap yang dibeli dari Pasar A masih layak dikonsumsi sampai pada 2 hari penyimpanan dalam suhu ruang, dibandingkan dengan ikan yang dibeli dari pasar B.Kata Kunci: Kajian Mutu, Ikan Cakalang (Katsuwonus pelamis L), Ikan Asap.

scholarly journals NILAI EKONOMI SUMBERDAYA PERIKANAN DI SULAWESI UTARA (Studi Kasus Ikan Cakalang, Katsuwonus pelamis)

2013 ◽  
Vol 1 (2) ◽  
pp. 74
Author(s):  
Keren W. Lumi ◽  
Eddy Mantjoro ◽  
Max Wagiu
Keyword(s):  
Economic Value ◽  
Raw Material ◽  
Market Area ◽  
Skipjack Tuna ◽  
Fish Processing ◽  
Katsuwonus Pelamis ◽  
Fish Resources ◽  
Fisheries Resources ◽  
North Sulawesi ◽  
Trade Name

NILAI EKONOMI SUMBERDAYA PERIKANAN DI SULAWESI UTARA (Studi Kasus Ikan Cakalang, Katsuwonus pelamis)1 Economic Value of Fisheries Resources in North Sulawesi (Case Study of Skipjack Tuna, Katsuwonus Pelamis) Keren W Lumi2, Eddy Mantjoro3, Max Wagiu3   ABSTRACT   Skipjack tuna or by local term called ikan Cakalang were recognized as a mayor fish resource landed in several producing area of North Sulawesi Province. This fish species have a great contributions to the local and regional economy as it were used as raw material for various fish processing industry such as frozen fish, simple smoked fish, katsuobushi, and skipjack canning plants. Skipjack fish has several trade name depend on the market area. In North Sulawesi market area is called cakalang while skipjack tuna known as the International  trade name. Economic values of skipjack  tuna can be trace back  through micro and macro economics as well as from fisheries resources economics point of view. Based on this frame of mind than the present study is focus on the analysis of economic values of skipjack in term of its contribution on  the local economy activities such as work absorbtion, fishing industry, fish processing industry, auxiliary industry and marketing institutions created to handle this fish resources. The research performed during the period of April up  to September 2012. Bitung city was selected as the area of research based on  the facts that this location have long been the mayor skipjack tuna fishing base as well as the center of fish processing industries  which using skipjack tuna as their raw material. The result of study indicated that skipjack fish resources have a great economic value in term of creating investments in various aspects of economy in North Sulawesi province particularly its contribution in the economy of Bitung city administration area.   Keywords : Fisheries resources economics, skipjack tuna, economic value   ABSTRAK Skipjack tuna atau yang disebut ikan cakalang dikenal  sebagai  sumberdaya  ikan terbanyak didaratkan pada beberapa daerah produksi di Provinsi Sulawesi Utara. Spesies ikan ini memberikan kontribusi besar sekali baik bagi perekono-mian skala lokal maupun karena berfungsi sebagai bahan baku bagi berbagai  industri pengolahan seperti ikan cakalang asap, Ikan kayu (katsuobushi), dan  pabrik pengolahan ikan kaleng. Spesies skipjack memiliki sejumlah nama  dagang tergantung daerah pemasaran. Di pasaran wilayah Sulawesi Utara di kenal dengan nama dagang ikan Cakalang sedangkan istilah skipjack tuna di pakai sebagai nama dagang internasional. Nilai ekonomi Ikan Cakalang dapat  ditelusuri melalui sudut pandang ekonomi mikro dan makro serta ilmu ekonomi sumberdaya perikanan. Bertolak dari kerangka berpikir tersebut  maka  penelitian   1 Bagian dari skripsi 2 Mahasiswa Program Studi Agrobisnis Perikanan FPIK-UNSRAT 3 Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi kali ini diarahkan pada upaya analisis nilai ekonomi sumberdaya ikan Cakalang  dalam bentuk seberapa besar kontribusinya terhadap kegiatan perekonomian  lokal seperti penyerapan tenaga kerja, dorongan investasi di sektor penang-kapan, pengolahan, industri penunjang dan terbentuknya lembaga pemasaran  yang menangani sumberdaya ikan ini. Penelitian telah dilaksanakan pada selang waktu antara bulan Mei hingga September 2012. Kota Bitung telah dipilih  seba-gai lokasi penelitian berdasarkan fakta bahwa daerah ini telah lama menjadi  basis armada penangkapan ikan cakalang dan juga sebagai pusat industri  pengolahan yang memanfaatkan ikan cakalang sebagai bahan baku utamanya. Hasil studi menunjukan bahwa sumberdaya ikan cakalang memang telah  memberikan kontribusi ekonomi sangat besar dalam bentuk mendorong investasi pada berbagai aspek ekonomi di Sulawesi Utara terutama kontribusi terhadap  perekonomian wilayah administrasi Kota Bitung   Kata kunci : ekonomi sumberdaya perikanan, ikan cakalang, nilai ekonomi

scholarly journals Catch And Length-Weight Relationship Of Freshwater Lobster, Cherax Quadricarinatus Von Martens, 1868 In Tondano Lake, Kakas District, Minahasa, North Sulawesi

2018 ◽  
Vol 6 (1) ◽  
pp. 85
Author(s):  
Yosef Gerard Jamlean ◽  
Nego E. Bataragoa ◽  
Jhon L. Tombokan
Keyword(s):  
Growth Pattern ◽  
Condition Factor ◽  
Natural Habitat ◽  
Economic Value ◽  
Clarias Gariepinus ◽  
Weight Relationship ◽  
North Sulawesi ◽  
Weight Growth ◽  
African Sharptooth Catfish ◽  
Relationship Of

C. quadricarinatus (red claw) has important economic value either for consumption or as ornamental crustacean, has been  cultivated, and introduced to many waterways outside its natural habitat. In Tondano lake, C. quadricarinatus has developed and become fishing target  using traps and spearguns.  The purpose of this survey is to describe the freshwater lobster catching using traps, and to know the length-weight relationships, growth pattern and condition factor. The study was expected to use as information on the presence of C. quadricarinatus Tondano Lake. Catches were red claw, C. quadricrinatus, marble sleeper Oxyeleotris marmorata, Mud gudgeon Ophieleotris aporos, Mozambique tilapia Oreochromis mossambicus and African sharptooth catfish Clarias Gariepinus. Length-weight relationship of C. quadricarinatus was W = -1.8005 + 4.2765 log L for males, W = -1.2978 + 3.6524 log L for females, respectively, and W = -1.5631 + 3.9848 log b for combined sexes. They had positive allometric (A +) growth. Condition factor ranged from 0.60-1.43 with an average of 1.071 ± 0.17 for males and 0.46-1.36 with an average of 1.027 ± 0.18 for females, 0.59-1.642 withan average of 1.22± 0.21.Keywords: fishing, length-weight, growth pattern, fishing gear, Kakas district, MinahasaAbstrakC. quadricarinatus (red claws) mempuyai nilai ekonomis penting baik komsumsi maupun sebagai krustasea hias dan  telah banyak di budidaya serta di introduksi ke banyak perairan  di luar habitat aslinya. Di Danau Tondano, C. quadricarinatus telah berkembang biak dan menjadi target penangkapan nelayan mengunakan alat tangkap bubu dan alat tangkap tura sejenis tombak sambil menyelam. Tujuan penelitinan ini ialah untuk mendeskripsikan penangkapan lobster air tawar C. quadricarinatus menggunakan alat tangkap bubu, hubungan panjang berat, pola pertumbuhan dan faktor kondisi. Hasil penilitian ini diharapkan dapat digunakan sebagai informasi keberadaan lobster air tawar C. quadricarinatus di Danau Tondano. Hasil tangkapan yang didapat adalah lobster air tawar, ikan Betutu, ikan Payangka, ika Mujair dan ikan Lele Dumbo. Hasil hubungan panjang berat lobster air tawar di dapat jantan : W=-1,8005+4,2765 log L, betina : W=-1,2978+3,6524 log L dan gabungan ( jantan & betina) : W=-1,5631+3,9848 log L. Pola pertumbuhan ketiganya ialah allometrik positif (A+) dan faktor kondisi jantan berkisar 0,60-1,43 dengan rata-rata1,071±0,17, betina berkisar 0,46-1,36 dengan rata-rata 1,027±0,18, dan gabungan (jantan dan betina) berkisar 0,59-1,642 dengan rata-rata1,22±0,21.Kata Kunci : Penangkapan, Hubungan panjang berat, Pola pertumbuhan, Kecamatan Kakas

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