scholarly journals Pengaruh Perbedaan Ukuran Jaring Insang Terhadap Hasil Tangkapan Ikan Tongkol Euthynnus sp. di Perairan Tenggara Kabupaten Karangasem

2021 ◽  
Vol 4 (2) ◽  
pp. 16
Author(s):  
Dwi Nindra Saputra ◽  
I Wayan Gede Astawa Karang ◽  
Ni Luh Putu Ria Puspitha

Tuna is one of the main catching commodities in the waters of Southeast Karangasem. Fishers in the Southeast waters of Karangasem used drift gillnet operations to find pelagic fish such as mackerel. This study aims to determine the composition of fish catches using different net sizes and determine the effect of different gill nets on the catch of tuna fish in the southeast waters of the Karangasem Regency. The study was conducted for one month from mid-October to mid-November 2017 by following fishers' fishing trips. The fishing gear used was gill nets with differences, namely 2' 2.5 and 3 inches. The data was taken directly by operating the gill net, which has three different mesh sizes then the data was analyzed by ANOVA. Based on the research found four types of fish, namely Tuna (Euthynnus sp.), ikan kembung (Restrelliger kanagurta), barracuda (Sphyraena barracuda), and Manta sp. with details on 2.5 sized nets, three species (cobs, mackerel, barracuda), while sediment nets with a size of 2 (tuna and mackerel), and 3 (tuna and manta rays). Each gets two types of fish. Based on the ANOVA test, the calculated F results in this study are (7.7608) and F table (3.4668). The difference in the size of the gill nets significantly affects the catch of tongkol fish. The F test value shows that the F count was greater than the F table.

2019 ◽  
Vol 10 (1) ◽  
pp. 15-23
Author(s):  
Nelwida Nelwida ◽  
Lisna Lisna ◽  
Ren Fitriadi

Gill nets is the most dominant fishing gear used by fishermen in Kampung Nelayan Village. Gill nets 2 and 3 inches are widely used by traditional fishermen and modern fishermen because this tool is very practical to catch fish also friendly to the environment. This study aims to determine the construction and friendliness of fishing gear gill nets 2 and 3 inches which include the length of the net, the width of the net, shortening, buoyancy and sinking power. This research was carried out in the Village of Kampung Nelayan, Tungkal Ilir Subdistrict, Tanjung Jabung Barat District in February 2018. The method used in this research was survey method. The data obtained were analyzed using net dimension analysis and descriptive statistical analysis. Based on the results of research on the construction of 2 and 3 inches gill nets consisting of nylon monofilament made from transparent colors. The knot used by the English knot. Top rope, float, and float buoy made from polyethylene (PE) rope and ballast rope made from polypropylene (PP). The sinker made from tin and gill net 3 inch weight based on bracelet-shaped wire.Net shortening value of 2 inch is 51.75% and has a buoyancy of 3.05 kgf and a sinking power of 9.97 kgf. As well as the value of gill shortening 3 inch 50.62% and the buoyancy generated 6.22 kgf and the sinking power of 365.4 kgf. The value of environmental friendliness of 2 and 3 inch nets has a value of 31.25 and 30.75 and is classified as environmentally friendly fishing gear.


2021 ◽  
Vol 328 ◽  
pp. 08011
Author(s):  
Sajriawati Sajriawati

The purpose of this study was to determine the fishing technology used by fishermen in Merauke to catch snapper and post-harvest handling of fish maw snapper. This research was conducted in January 2021 in Kumbe Village, Malind District. Data collection was carried out by interviewing fishermen on the fishing boat KMN Nur Aqila07. The results showed that the fishing boat KMN Nur Aqila07 has a weight specification of 30 GT. The main fishing gear is a drift gill net with a length of 50 meters with a width of 2 meters with a mesh size of 7.5 inches. The pulley machine is used to help pull the gill nets when they want to pull fishing gear (hauling). Fish maw of snapper is removed manually using a knife, then cleaned with running water and then dried in the sun to dry. Fish maw is sold dry. The highest price for fish maw is in the weight range of 150 grams which can reach Rp. 22,500,000 per kg, while the lowest price is in the weight range of less than 50 grams, which is Rp. 4,500,000 per kg.


Author(s):  
Aditya Nuraga ◽  
Bogi Budi Jayanto ◽  
Indradi Setiyanto

Bagan perahu merupakan salah satu jenis alat tangkap di PPN Karangantu yang beroperasi pada malam hari. Bagan perahu menarik ikan target tangkapan yaitu ikan pelagis kecil fototaksis positif menggunakan atraktor cahaya berupa lampu. Salah satu kendala nelayan bagan perahu adalah pencahayaan lampu mengalami pembiasan. Penggunaan lampu bawah air bertujuan untuk mengurangi pembiasan. Tujuan dari penelitian ini adalah mengetahui pengaruh penggunaan lampu bawah air terhadap hasil tangkapan bagan perahu dan mengetahui komposisi hasil tangkapan bagan perahu dengan dan tanpa lampu bawah air. Penelitian ini dilakukan selama 10 trip menggunakan metode experimental fishing. Selisih berat total hasil tangkapan antara bagan perahu dengan dan tanpa lampu bawah air pada trip 1 sebesar 33,4 kg, trip 2 sebesar 38,9 kg, trip 3 sebesar 31,1 kg, trip 4 sebesar 41,1 kg, trip 5 sebesar 28,8 kg, trip 6 sebesar 30,5 kg, trip 7 sebesar 35,4 kg, trip 8 sebesar 34,3 kg, trip 9 sebesar 38,7 kg dan trip 10 sebesar 31,6 kg sehingga menunjukkan hasil tangkapan lebih banyak bagan perahu dengan lampu bawah air. Hasil tangkapan utama bagan perahu adalah ikan Teri (Stolephorus sp.) dan Cumi-cumi (Loligo sp.). Hasil tangkapan sampingan bagan perahu antara lain ikan Petek (Leiognathus sp.), Tembang (Sardinella sp.), Lemuru (Amblygaster sirm), Selar Kuning (Selaroides leptolepi) dan Layur (Lepturacanthus savala). Kesimpulan yang dapat diambil yaitu terdapat pengaruh antara lampu bawah air dengan hasil tangkapan pada bagan perahu. Boat lift net is one type of fishing gear at PPN Karangantu which operates at night. Boat lift net attracts the target catch fish, the small pelagic fish is positive phototaxis using a light attractor in the form of a lamp. One of the constraints of fishermen on the boat chart is that the lighting has experienced refraction. Underwater lamp aims to reduce refraction.The purpose of this research is to know the effect of underwater lamp usage on boat lift net fishing catch and to know the composition of boat lift net with and without using underwater lamp. This research was conducted for 10 trips using experimental fishing methods. The difference in total catch of boat lift net with and without underwater lamp on trip 1 is 33,4 kg, trip 2 is 38,9 kg, trip 3 is 31,1 kg, trip 4 is 41,1 kg, trip 5 is 28,8 kg, trip 6 is 30,5 kg, trip 7 is 35,4 kg, trip 8 is 34,3 kg, trip 9 is 38,7 kg and trip 10 is 31,6 kg so it shows the catch is more the boat lift net with underwater lamp. Fish targets of the boat lift net are Anchovy (Stolephorus sp.) and Cuttlefish (Loligo sp.). The bycatches of boat lift net are Pony fish (Leiognathus sp.), Fringescale sardinella (Sardinella sp.), Indian sardinella (Amblygaster sirm), Trevally (Selaroides leptolepi) and Hairtail fish (Lepturacanthus savala). The conclusion that can be drawn that there is an influence between underwater lamp and catches on the boat lift net.


2015 ◽  
Vol 5 (1) ◽  
pp. 50-59
Author(s):  
Elisabeth Cory Ohoiwutun

The regency of southeast Maluku has a variety of promising fisheries and marine potency to be managed. Unfortunately, it has not been used properly. The fishing production volume of small pelagic in every season using gill net fishing gear has not been able to increase the income of fishermen in Southeast Maluku regency. The analytical methods used were the External Factor Evaluation (EFE), Internal Factor Evaluation (IFE), Internal-External (IE) and Strengths Weaknesses Opportunities Threats (SWOT) analytical matrix. These were used to develop the strategy of small Pelagic with gill net fishing gear. Based on the result, gill net fishing gear has a number of different production each season against every kind of small pelagic fish.Keywords: fishermen, gillnet, small pelagic fish


2004 ◽  
Vol 61 (2) ◽  
pp. 168-174 ◽  
Author(s):  
Gerold C Grant ◽  
Paul Radomski ◽  
Charles S Anderson

We developed a new approach for directly quantifying selection parameters for fishing gear using a dual underwater video camera apparatus and employed the method to estimate gill net retention probability for walleye (Sander vitreus). The method allows observation of fish behavior around fishing gear and estimation of the absolute probability of fish encountering, contacting, or being retained by the gear. We demonstrated the applicability of this method by quantifying the probability that walleye were retained in multifilament nylon gill nets after contacting the nets. Walleye with total lengths 2.49 times the perimeter of the mesh were most likely to be retained, and retention probability peaked at 0.60 (95% confidence interval 0.41–0.90), meaning 40% of walleye that were the ideal size for a given mesh escaped after contacting the net. Our empirically derived retention curve exhibited a steep ascending limb and strong positive skew because of walleye morphology and the tendency for larger walleye to be captured by tangling. Most walleye that avoided capture did not fully enter the mesh or backed out of the mesh after they became temporarily wedged or tangled.


Author(s):  
Fransina Kawarnidi ◽  
Ivor L. Labaro ◽  
Fanny Silloy

The bottom gill nets are the most common fishing gear in coastal areas, with different mesh sizes.The catch of bottom gill nets is generally dameral fish with different sizes and species. Scientific information about the difference of catch composition in the 3-inch and 4-inch mesh size of bottom gill nets is still poorly available. It is therefore necessary to study a composition of the catch on two bottom gill net mesh sizes of 3 inches and 4 inches, comparing the composition of the quantity and weight of the catch and identify the species of fish caught.  This research was done in coastal waters of Talise Tambun village, Likupang Barat District of Minahasa Utara Regency for two weeks October 2017; following a descriptive method based on case studies. Two unit bottom gill nets were operated seven trips to data colected; and the data were analyzed by composition species analysis and weight composition.The results showed that the composition of the catch quantity of bottom gill net 3-inch 64 fish and 48 species dominated by Rengginan fish 21.88%, while the catching composition of 4-inch mesh size amounted to 91 fishes and 63 species dominated by Swangi as 14.29% .  The weight catch composition of the 3-inch bottom gill net was dominated by sharks of 25.16% with a weight of 33.386 kg, while the 4-inch bottom gill net catch weights were dominated by snapper as 35.71% with a weight of 101,502 kg.The results of the analysis showed that the 3-inch mesh size of bottom gill net catch composition of both the quantity, the species and the catch weight was better than the 4-inch capture composition.Keywords: Bottom gillnet, weight, composition ABSTRAKJaring insang dasar adalah alat tangkap yang banyak ditemukan diwilayah pesisir, dengan ukuran mata jaring yang berbeda-beda.Hasil tangkapan jaring insang dasar umumnya ikan damersal dengan ukuran dan jenis yang berbeda.Informasi Ilmiahtentang perbedaan komposisi hasil tangkapan pada jaring insang dasar mata 3 inci dan 4 inci masih kurang tersedia.Untuk itu perlu suatu penelitian yang bertujuan mengetahui komposisi hasil tangkapan pada dua ukuran mata jaring insang dasar 3 inci dan 4 inci, membandingkan komposisi jumlah dan bobot hasil tangkapan dan mengidentifikasi jenis ikan yang tertangkap.Penelitian ini dilaksanakan di perairanDesa Talise Tambun Kecamatan Likupang Barat Kabupaten Minahasa Utara;  selama 2 minggu, pada bulan Oktober 2017;  dikerjakan dengan mengikuti metode deskriptif yang didasarkan pada studi kasus.Dua unit jaring insang dasar PA Multifilament dengan besar mata masing-masing 3 dan 4 inci dioperasikan selama 7 trip untuk mengumpulkan data; dan data dianalisis dengan analisis komposisi jenis dan komposisi bobot.Hasil penelitian menunjukkan bahwa komposisi jumlah tangkapan  jaring insang dasar mata 3 inci sebanyak  64 ekor dan 48 jenis yang didominasi oleh ikan Rengginan sebesar 21.88%, sedangkan komposisi tangkapan jaring insang dasar 4 inci berjumlah 91 ekor dan 63 jenis yang didominasi oleh  ikan Swangi sebanyak 14.29 %.  Selanjutnya komposisi bobot tangkapan jaring insang dasar mata 3 inci didominasi oleh ikan Hiu sebesar 25.16 % dengan  bobot 33,386 kg, sedangkan komposisi bobot tangkapan jaring insang dasar mata 4 inci didominasi oleh ikan kakap sebanyak 35.71% dengan bobot 101,502 kg. Hasil analisis menunjukkan bahwa komposisi tangkapan jaring insang dasar mata 3 inci baik jumlah, jenis maupun bobot tangkapan lebih baik dibandingkan dengan komposisi tangkapan jaring insang dasar mata 4 inci.Kata-kata Kunci: Jaring insang dasar, bobot, komposisi.


Author(s):  
Najamuddin Najamuddin ◽  
Andi Assir ◽  
Mahfud Palo ◽  
Andi Asni Najamuddin

Catching flying fish in Sendana Majene Subdistrict is carried out continuously with gill nets 1-1.5 inches. The catch of flying fish is mostly still young fish (not yet worth catching). The demand for flying fish is quite high due to the existence of special stalls of smoke fly fish around fishing settlements. Apart from smoke flying fish, dried flying fish are also sold as souvenirs. Therefore, fishermen will continue to increase production. Various results of research and field observations show that gill net is able to catch flying fish well but the size of fish caught is dominated by young fish. The effort to increase the net mesh size to 1.5 inches resulted in the diminishing number of young flying fish. Catching flying fish in Majene waters is generally carried out with drifting gill nets with mesh sizes of 1 and 1.25 inches which are very intensive every fishing season while L50 (11.92 cm) and Lm (13.59 cm) for 1 inch more net mesh size were smaller compared to the length of the first gonad maturity, in this case most of the catch is still classified as young fish (Palo, 2009). Partners are a group of flying fish fishermen. Partner problems, flying fish production is getting smaller, group capacity is not strong and group management is still weak. Partners have not been able to obtain assistance facilities from various community empowerment programs carried out by the government. The approach to be used in this service includes: identification, observation, counseling, demonstration, construction, application, assistance, field observation and evaluation monitoring. Indicators of the success of activities are measured based on the results of the application of technology compared to the results of fishing gear commonly used by fishermen. Implementation of service includes counseling, construction of fishing gear, fishing operations and assistance has been going well. The size of 1.5-inch mesh is only able to catch flying fish in a limited amount, while the size of the 1.25-inch mesh can catch flying fish in relatively large numbers. Flying fish caught with 1.25-inch mesh size has passed the size of the first gonad mature so that it supports sustainable fisheries.


Author(s):  
Hasmawati Hasmawati ◽  
Adam Adam ◽  
Muhammad Aras ◽  
Salman Salman

The potential of marine fish resources in Districts Barru is multi-species, especially pelagic fish. Therefore, in the management and utilization of fishery resources it is very possible for the community to be able to operate various fishing gear. This study aims to determine the composition of the types of fishing gear operated by fishermen in Barru Districts waters of during the pandemic Covid 19. Data collection was carried out from September to October 2020 in around the waters and coastal areas in Barru Districts. This study used a descriptive survey method, by collecting available data (secondary data) in the form of: categories of types and numbers of fishing gears. besides that, field observations will also be carried out. During the pandemic Covid-19, the operation of fishing gear in Barru Districts waters was 13 types of fishing gear, with a composition consisting of four types of fishing gears that were predominantly used, namely 622 drifting gill nets (28.4%), hand lines (21, 7%), Bottom gill nets (19.9%), trolling line (9.6%). Meanwhile, the least used fishing gear was 8 Bagan Tancap (lift net) (0.4%).


2017 ◽  
Vol 1 (1) ◽  
pp. 89
Author(s):  
Indah Purwaningsih ◽  
Supriyanto Supriyanto

Abstract: Chlorine is a green halogen-shaped halogen gas at normal temperature and serves as bleach, stain remover and disinfectant. Chlorine is now widely used for bleaching rice so that less quality rice looks like quality rice. Chlorine is very toxic and causes mucous membrane irritation, highly reactive and very powerful oxidizer. The purpose of this research was to determine the difference of chlorine level in chlorinated rice washed once, twice and 3 times. The sample in this study amounted to 11 samples calculated by replication formula. Each sample was treated 3 times, ie 1 washed once, 2 washed twice and washed 3 times. The samples then examined by iodometric titration method. Based on the results of the study using ANOVA test, 11 samples obtained the average value of chlorine after washed once amount of 0.0176%, after washed twice amount of 0.0111%, and after washed 3 times amount of 0.0052% with the value significance p = 0.03 (p <0.05) at 95% confidence level which means there was a significant difference between chlorine levels in chlorinated rice washed once, twice and 3 times.Abstrak: Klorin merupakan unsur halogen berbentuk gas berwarna kuning kehijauan pada suhu normal danberfungsi sebagai pemutih, penghilang noda maupun desinfektan. Klorin sekarang banyak digunakan untuk bahan pemutih beras agar beras yang kurang berkualitas tampak seperti beras berkualitas. Klorin sangat toksik dan menyebabkan iritasi membran mukosa, sangat reaktif dan merupakan oksidator yang sangat kuat. Tujuan dari penelitian ini ialah untuk mengetahui perbedaan kadar klorin pada beras berklorin yang dicuci sebanyak 1 kali, 2 kali dan 3 kali. Sampel dalam penelitian ini berjumlah 11 sampel yang dihitung dengan rumus replikasi. Setiap sampel diberi perlakuan sebanyak 3 kali, yaitu 1 kali pencucian, 2 kali pencucian dan 3 kali pencucian. Sampel penelitian kemudian diperiksa dengan metode titrasi iodometri. Berdasarkan hasil penelitian menggunakan uji Anova secara komputerisasi terhadap 11 sampel diperoleh nilai rata-rata kadar klorin setelah 1 kali pencucian sebesar 0,0176 %, setelah 2 kali pencucian sebesar 0,0111 %, dan setelah 3 kali pencucian sebesar 0,0052 % dengan nilai signifkansi p = 0,03 (p<0,05) pada tingkat kepercayaan 95% yang artinya ada perbedaan yang bermakna antara kadar klorin pada beras berklorin yang dicuci sebanyak 1 kali, 2 kali dan 3 kali.


2017 ◽  
Vol 4 (2) ◽  
pp. 31
Author(s):  
Dwi Nur Rikhmasari

<p align="center"> </p><p><em>A</em><em>gung Semeru </em><em>banana </em><em>and </em><em>M</em><em>as Kirana, is one of the typical banana varieties found in Lumajang Regency. Where on the </em><em>banana peel extraction</em><em> contain various antifungi compounds. The purpose of this research is to know the difference of banana extract of Agung Semeru and banana Mas Kirana varieties of lumajang, in inhibiting the growth of pathogenic fungi Candida albicans, and to know the optimal concentration which can inhibit the growth of Candida albicans. The method used was Completely Random Design (RAL) with four of factors, that is: 0, 25, 50, 75 and 100 %. The results were analyzed with Anova test and Duncan test multiple ranger test at the level of 5%. Each treatment was repeated three times. </em><em>The results show that there is an effect of giving extract of Semeru banana peel (sig = 0,00) and banana Mas Kirana (sig = 0,00) to Candida albicans growth at various concentration (0%, 25%, 50%, 75% and 100%). For extract of Semeru banana peel at concentration 75% (</em><em>3,19  ± 0,84</em><em> mm) showed better result from other concentration, while for banana Mas Kirana Lumajang peel extract, at concentration 50% (</em><em>2,44 ± 0,0 mm</em><em>) showed better result than treatment other. Ability of antifungal activity of Agung Semeru banana peel extract better than banana Mas Kirana.</em></p><p><em> </em></p>


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