scholarly journals KELIMPAHAN ZOOPLANKTON DAN BIOMASSA IKAN TERI (Stolephorus spp.) PADA BAGAN DI PERAIRAN KWATISORE TELUK CENDERAWASIH PAPUA (Abundance of Zooplankton and Biomass of Anchovy (Stolephorus spp.) of Liftnet at Kwatisore Bay, Cendrawasih Gulf, Papua)

2016 ◽  
Vol 6 (2) ◽  
pp. 143
Author(s):  
Amelian Dinisia ◽  
Enan M. Adiwilaga ◽  
. Yonvitner
Keyword(s):  
National Park ◽  
Fish Larvae ◽  
Pelagic Fish ◽  
Zooplankton Biomass ◽  
Fishing Gear ◽  
Important Food ◽  
Small Pelagic Fish ◽  
Park Area ◽  
Almost All ◽  
Euterpina Acutifrons

ABSTRACT<br /><br />Millions of organisms can be found in the Cenderawasih Gulf National Park area, especially in the waters of the Kwatisore Bay, Nabire and has been well-known to almost all over the world. Large zooplankton is an important food for migrated fish larvae and all kinds of fish including anchovies. Anchovy is the food of large and small pelagic fish groups. Groups of fish that use plankton as food were included anchovy. The main catch product of lift net at the Kwatisore bay is anchovy (Stolephorus spp.). This study aims to assess the level of availability of anchovy in relation to the abundance of zooplankton as food and to analyze the influence of anchovy fishing activities with lift net fishing gear. The results were obtained 51 species of zooplankton, which consists of 44 types holoplankton and 7 types of meroplankton. There were 17 species of zooplankton were found in the stomach of anchovy with the subgroup dominated by copepods (73.51 %). Among 17 species of zooplankton there 2 types that were found in all four sampling periods, namely Calanus sp. 2 and Euterpina acutifrons. There is a relationship between the abundance of individual zooplankton in the waters of the anchovy biomass and also between the abundance of zooplankton and biomass of anchovy.<br /><br />Keywords: abundance of zooplankton, biomass of anchovy, lift net at Kwatisore<br />-------<br /><br />ABSTRAK<br /><br />Jutaan organisme dapat ditemukan dalam kawasan Taman Nasional Teluk Cenderawasih khususnya di perairan Kwatisore, Nabire dan telah terkenal sampai hampir ke seluruh dunia. Zooplankton berukuran besar merupakan makanan penting bagi ikan-ikan yang bermigrasi dan larva semua jenis ikan termasuk didalamnya ikan teri. Ikan teri merupakan makanan dari kelompok ikan pelagis besar dan kecil. Kelompok ikan-ikan yang banyak memanfaatkan plankton dari kelompok ikan pelagis kecil diantaranya ikan teri. Hasil tangkapan utama bagan penangkap ikan pelagis kecil di perairan Kwatisore ialah jenis teri (Stolephorus sp.). Tujuan penelitian ini adalah untuk mengkaji tingkat ketersediaan ikan teri dalam kaitannya dengan kelimpahan zooplankton sebagai makanannya serta menganalisis pengaruh dari aktivitas penangkapan ikan teri dengan alat tangkap bagan. Secara keseluruhan dari seluruh stasiun dalam setiap periode sampling, diperoleh 51 jenis zooplankton yang terdiri atas 44 jenis holoplankton dan 7 jenis meroplankton. Terdapat 17 jenis zooplankton yang ditemukan dalam lambung ikan teri dengan didominasi oleh Sub-grup Copepoda (73,51%). Diantara ke-17 jenis zooplankton tersebut terdapat 2 jenis yang ditemukan pada keempat periode sampling yaitu Calanus Sp.2 dan Euterpina acutifrons. Hasil analisis regresi linier antara biomassa ikan teri hasil tangkapan bagan dan kelimpahan maupun antara biomassa ikan teri hasil tangkapan bagan dan jumlah jenis zooplankton menunjukkan adanya korelasi positif.<br /><br />Kata kunci: kelimpahan zooplankton, biomassa ikan teri, bagan di Kwatisore

The box-balance model: a new tool to assess fish larval survival, applied to field data on two small pelagic fish

2020 ◽  
Vol 650 ◽  
pp. 289-308 ◽  
Author(s):  
V Raya ◽  
J Salat ◽  
A Sabatés
Keyword(s):  
Field Data ◽  
Fish Larvae ◽  
Larval Growth ◽  
Warming Trend ◽  
Mortality Rates ◽  
Larval Survival ◽  
Pelagic Fish ◽  
Balance Model ◽  
Small Pelagic Fish ◽  
Mesoscale Structures

This work develops a new method, the box-balance model (BBM), to assess the role of hydrodynamic structures in the survival of fish larvae. The BBM was applied in the northwest Mediterranean to field data, on 2 small pelagic fish species whose larvae coexist in summer: Engraulis encrasicolus, a dominant species, and Sardinella aurita, which is expanding northwards in relation to sea warming. The BBM allows one to quantify the contribution of circulation, with significant mesoscale activity, to the survival of fish larvae, clearly separating the effect of transport from biological factors. It is based on comparing the larval abundances at age found in local target areas, associated with the mesoscale structures (boxes), to those predicted by the overall mortality rate of the population in the region. The application of the BBM reveals that dispersion/retention by hydrodynamic structures favours the survival of E. encrasicolus larvae. In addition, since larval growth and mortality rates of the species are required parameters for application of the BBM, we present their estimates for S. aurita in the region for the first time. Although growth and mortality rates found for S. aurita are both higher than for E. encrasicolus, their combined effect confers a lower survival to S. aurita larvae. Thus, although the warming trend in the region would contribute to the expansion of the fast-growing species S. aurita, we can confirm that E. encrasicolus is well established, with a better adapted survival strategy.

scholarly journals ANALYSIS OF THE VERTICAL DISTRIBUTION OF THE ABUNDANCE OF SMALL PELAGIC FISH LARVAE IN THE GULF OF CALIFORNIA USING SUBMARINE VIDEOCAMERAS

2009 ◽  
Vol 24 (2) ◽  
pp. 153
Author(s):  
G. Aceves-Medina ◽  
C. J. Robinson ◽  
R. Palomares-García ◽  
J. Gómez-Gutierrez
Keyword(s):  
Vertical Distribution ◽  
Gulf Of California ◽  
Fish Larvae ◽  
Pelagic Fish ◽  
Small Pelagic Fish ◽  
Sardinops Sagax ◽  
Etrumeus Teres ◽  
Engraulis Mordax ◽  
The Vertical Distribution

Análisis de la distribucion vertical de la abundancia de larvas de peces pelágicos menores en el Golfo de California mediante videocámaras submarinas Se utilizaron dos tipos de videocámaras submarinas para estudiar la distribución y abundancia vertical de larvas de los peces pelágicos menores Engraulis mordax, Etrumeus teres y Sardinops sagax a 1 m de resolución, en una localidad en el norte del Golfo de California con condiciones de calma y alta densidad de sardinas adultas. La mayor abundancia promedio (900 larvas m -1 min -1 ) se encontró inmediatamente arriba de la termoclina (33 m) y la picnoclina (36 m), aparentemente no asociada al máximo de clorofila detectado en superficie, ni a la mayor densidad de peces adultos (10 -20 m). Las observaciones con video permitieron determinar la distribución vertical a una resolución imposible de obtener mediante muestreos con redes; sin embargo, esta es una técnica poco útil en zonas con elevada velocidad de las corrientes.

scholarly journals PENGARUH PENGGUNAAN LAMPU BAWAH AIR (UNDERWATER LAMP) TERHADAP HASIL TANGKAPAN BAGAN PERAHU (BOAT LIFT NET) DI PELABUHAN PERIKANAN NUSANTARA (PPN) KARANGANTU KOTA SERANG (Effect of Underwater Lamp Usage on Boat Lift Net Fishing Catch at Karangantu Fishing Port Serang City)

2018 ◽  
Vol 14 (1) ◽  
pp. 36
Author(s):  
Aditya Nuraga ◽  
Bogi Budi Jayanto ◽  
Indradi Setiyanto
Keyword(s):  
Pelagic Fish ◽  
Fishing Gear ◽  
Total Catch ◽  
Small Pelagic Fish ◽  
Positive Phototaxis ◽  
The Difference ◽  
Lepturacanthus Savala

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.

scholarly journals FISHING ZONE IN KARIMUNJAWA NATIONAL PARK

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
Domu Simbolon ◽  
Ririn Irnawati ◽  
Budy Wiryawan ◽  
Bambang Murdiyanto ◽  
Tri Wiji Nurani
Keyword(s):  
Information System ◽  
Economic Model ◽  
National Park ◽  
Reef Fishes ◽  
Pelagic Fish ◽  
Fishing Gear ◽  
Comparative Performance ◽  
Resource Potential ◽  
Fish Resources ◽  
Pelagic Fishing

<p align="center"><strong><em>ABSTRACT</em></strong><em></em></p><p><em>Karimunjawa National Park (KNP) consists of 7 zones i.e., core, protection, tourism, residence, rehabilitation, cultivation, and traditional fisheries utilization zone. Fishing activities in the traditional fisheries utilization zone (TFUZ) was not optimal because of limited of fishing zone information. The objective of this study was to determine the fishing zone based on major fish for each fishing gear. This study was conducted in KNP from October to December 2009. The major fish resources were determined through analyses of comparative performance index (CPI). Fish resource potential was analyzed by bio-economic model. The existence of fish resources were used as a basis of arrangement of fishing gear arround the fishing zone, through consideration of fishing gear characteristics, the characteristics of waters, the probabilities of conflict, degradation of fish resources, and regulations. Map of fishing zones were created using geographicl information system. Results showed that potential fishes around the TFUZ were reef fishes such as trevallies, yellow tail, and grouper. The potency of r</em><em>eef fishes was about 149 tons/year and pelagic fish of 19,080 tons/year.</em><em> Fishing zones around the TFUZ consisted of (1) area of 0-3 miles from coastal line which was allocated as the fishing zone of reef fishes using hand line and fish trap, (2) area of 3-4 miles from coastal line which was allocated as demersal fishing zone using bottom gillnet, (3) area of 0-4 miles from coastal line which was allocated as pelagic fishing zone using surface gillnet, and (4) area that more than 4 miles which was allocated as pelagic fishing zone using</em><em> dynamic fishing gear (troll line), and boat lift net.</em></p><p> </p><p><strong><em>Keywords: </em></strong><em> fishing zone, reef fish, pelagic fish, gillnet, Karimunjawa</em></p>

scholarly journals Distribution of schistosomiasis intermediate snail in Lore Lindu National Park, Central Sulawesi

2021 ◽  
Vol 909 (1) ◽  
pp. 012018
Author(s):  
J Widjaja ◽  
Samarang ◽  
M Koraag ◽  
Y Srikandi ◽  
A Kurniawan
Keyword(s):  
Intermediate Host ◽  
National Park ◽  
Buffer Zone ◽  
Seepage Water ◽  
Host Snail ◽  
Global Positioning ◽  
Park Area ◽  
Almost All ◽  
Central Sulawesi ◽  
Lore Lindu National Park

Abstract Schistosomiasis in Indonesia is only found in three locations, namely the Napu Highland and the Bada Highland in Poso District and the Lindu Highland in Sigi District, Central Sulawesi Province. The disease is caused by Schistosoma japonicum with snail Oncomelania hupensis lindoensis as its intermediate host. The previous study found that almost all of this host snail foci area were distributed in the seepage water near the Lore Lindu National Park area. Unfortunately, there was no evidence whether O. h. lindoensis exists in the Lore Lindu National Park Area. The study aimed to map the focus areas of schistosomiasis intermediate host snails in the Lore Lindu National Park. The survey was conducted in February 2018, covering 12 villages belong to Napu Highland, Bada Highland, and Lindu Highland. Data collection included surveys on the snail habitat and the snail density. In both activities, geographic coordinates were determined using Global Positioning System (GPS). The results showed 14 foci areas of O. h. lindoensis were found in the buffer zone of Lore Lindu National Park.

scholarly journals Strategi Pengembangan Penangkapan Ikan Pelagis Kecil dengan Alat Tangkap Jaring Insang di Kabupaten Maluku Tenggara (The Development Strategy of Catching the Small Pelagic Fish by Gill Net Fishing Gear in Southeast Maluku Regency)

2015 ◽  
Vol 5 (1) ◽  
pp. 50-59
Author(s):  
Elisabeth Cory Ohoiwutun
Keyword(s):  
Development Strategy ◽  
External Factor ◽  
Pelagic Fish ◽  
Fishing Gear ◽  
Production Volume ◽  
Internal Factor ◽  
Small Pelagic Fish ◽  
Gill Net ◽  
The Development Strategy ◽  
Factor Evaluation

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

scholarly journals FISHING ZONE IN KARIMUNJAWA NATIONAL PARK

2016 ◽  
Vol 8 (1) ◽  
pp. 129-143
Author(s):  
Domu Simbolon ◽  
Ririn Irnawati ◽  
Budy Wiryawan ◽  
Bambang Murdiyanto ◽  
Tri Wiji Nurani
Keyword(s):  
Information System ◽  
Economic Model ◽  
National Park ◽  
Reef Fishes ◽  
Pelagic Fish ◽  
Fishing Gear ◽  
Comparative Performance ◽  
Resource Potential ◽  
Fish Resources ◽  
Pelagic Fishing

ABSTRACTKarimunjawa National Park (KNP) consists of 7 zones i.e., core, protection, tourism, residence, rehabilitation, cultivation, and traditional fisheries utilization zone. Fishing activities in the traditional fisheries utilization zone (TFUZ) was not optimal because of limited of fishing zone information. The objective of this study was to determine the fishing zone based on major fish for each fishing gear. This study was conducted in KNP from October to December 2009. The major fish resources were determined through analyses of comparative performance index (CPI). Fish resource potential was analyzed by bio-economic model. The existence of fish resources were used as a basis of arrangement of fishing gear arround the fishing zone, through consideration of fishing gear characteristics, the characteristics of waters, the probabilities of conflict, degradation of fish resources, and regulations. Map of fishing zones were created using geographicl information system. Results showed that potential fishes around the TFUZ were reef fishes such as trevallies, yellow tail, and grouper. The potency of reef fishes was about 149 tons/year and pelagic fish of 19,080 tons/year. Fishing zones around the TFUZ consisted of (1) area of 0-3 miles from coastal line which was allocated as the fishing zone of reef fishes using hand line and fish trap, (2) area of 3-4 miles from coastal line which was allocated as demersal fishing zone using bottom gillnet, (3) area of 0-4 miles from coastal line which was allocated as pelagic fishing zone using surface gillnet, and (4) area that more than 4 miles which was allocated as pelagic fishing zone using dynamic fishing gear (troll line), and boat lift net. Keywords:  fishing zone, reef fish, pelagic fish, gillnet, Karimunjawa

scholarly journals PERBEDAAN PENGGUNAAN INTENSITAS CAHAYA LAMPU TERHADAP HASIL TANGKAPAN BAGAN APUNG DI PERAIRAN SELAT ROSENBERG KABUPATEN MALUKU TENGGARA KEPULAUAN KEI

2010 ◽  
Vol 6 (3) ◽  
pp. 134
Author(s):  
Notanubun Julianus ◽  
Wilhelmina Patty
Keyword(s):  
Light Intensity ◽  
Pelagic Fish ◽  
Light Distribution ◽  
Fishing Gear ◽  
Small Pelagic Fish ◽  
Fish Size ◽  
Number Of Species ◽  
Light Intensities ◽  
Size Number

One of potential fishing grounds for small pelagic fish in Southeast Mallucas Regency is Rosenberg Strait waters. In this region, a study on the effect of different light intensities of floating lift net on fish catches was carried out. The analyses were done on light distribution of 4 light intensities different: Petromaks Lamp and Underwater Lamps of each 18 watt, 36 watt and 54 watt. This study showed that catches of floating lift net using different light intensities were statistically significantly different. The use of 36 watt and 54 watt underwater lamp yielded the same amount of catches but higher than that of 18 watt-underwater lamp and petromaks, both in number and species. Catches consisted of 17 species, 16 fishs and 1 mollusca. Number of species and size also varied with light intensity used. There were 13 fishs species dominated by Stolephorus indicus as much as 46.9 kg or 22% for petromaks catches, 14 fishs species dominated by Rastrelliger kanagurata as much as 64 kg (31%) for 18 watt underwater lamp, 17 fishs species dominated by Rastrelliger kanagurata as much as 76 kg (28%) for 36 watt underwater lamp, and 15 fishs species dominated by Stolephorus devisi as much as 54.8 kg (22%) for 54 watt underwater lamp, respectively. Based on the results, it is recommended that the use of light intensity in fishing operations of floating lift net should be 36 watt and 54 watt underwater lamps, due to high catches, both in number and species. Beside that, since light fishing has also caught illegal fish size, number of this fishing gear type should be controlled.

scholarly journals DINAMIKA PERIKANAN PAYANG DI PERAIRAN UTARA KARAWANG DAN SEKITARNYA

2019 ◽  
Vol 25 (4) ◽  
pp. 253
Author(s):  
Mohamad Adha Akbar ◽  
Mufti Petala Patria
Keyword(s):  
Sustainable Management ◽  
Field Survey ◽  
Weather Conditions ◽  
Pelagic Fish ◽  
Environmental Data ◽  
Fishing Gear ◽  
Small Pelagic Fish ◽  
Business System ◽  
Daily Scale

Perikanan skala kecil terutama perikanan payang merupakan salah satu tulang punggung mata pencaharian masyarakat pesisir di perairan Karawang, Jawa Barat. Peran nyata aktivitas perikanan pada keanekaragaman sumberdaya hayati laut adalah memanfaatkan sumberdaya hayati perairan laut di kawasan pesisir dengan kondisi kelimpahan sumberdaya ikan yang cenderung berfluktuasi pada tingkat yang relatif rendah. Penelitian dilakukan melalui survey lapang pada kurun waktu Agustus – Nopember 2018 dengan basis data hasil tangkapan dan upaya penangkapan pada rentang waktu 2016-2018. Beberapa data lingkungan terkait ragam keadaan cuaca yang digambarkan oleh data curah hujan, arah dan kecepatan angin digunakan untuk menggambarkan siklus adaptasi nelayan untuk mempertahankan mata pencariannya. Aktivitas penangkapan menggunakan perahu dengan tonase <10 GT dan rerata kekuatan mesin sekitar 20 PK, beroperasi dalam skala harian dengan alat penangkapan ikan utama adalah jaring payang. Perkembangan tahunan indeks kelimpahan sumberdaya ikan dengan alat tangkap payang pada kurun waktu 2004-2008 dan 2015-2018 cenderung menurun. Tahun 2004 nilai indeks kelimpahan sumberdaya ikan sebesar 268 kg/trip menjadi 199 kg/trip pada 2008 dan terus menipis menjadi sebesar 115 kg/trip tahun 2018. Hal ini mengindikasikan usaha perikanan cenderung berada pada kondisi tidak berkelanjutan bila tidak dilakukan pengelolaan. Keberlanjutan usaha perikanan masih dapat diharapkan jika dilakukan perubahan terhadap sistem usaha yang lebih bersifat menjadi gabungan individu perahu yang berukuran kecil menjadi usaha kelompok dengan perahu yang berukuran lebih besar diatas 10 GT dengan daerah penangkapan yang lebih jauh.One day pelagic seine (payang) fisheries, is one of the backbones of coastal community livelihoods in North Karawang waters, West Java. The significant role of fisheries activities to harvest small pelagic fish resource in coastal areas indicated that the monthly CPUE tend fluctuated and stabil at low level. The study was conducted through a field survey in the period August - November 2018 with a database of catches and efforts from 2016-2018. Some environmental data related to various weather conditions illustrated by rainfall data, wind direction and speed are used to describe the adaptation cycle of fishermen to maintain their livelihoods. Fishing activities using boat with tonnage <10 GT and average engine strength of around 20 PK, operating on a daily scale with the main fishing gear is payang net. The average annual catch per trip (CPUE) of payang fisheries within period of 2004-2008 to 2015-2018 tend to decrease. In 2004 the CPUE was 268 kg/trip then 2008 at 199 kg / trip, and continue to lower index in 2018 of 115 kg / trip. This indicates that the fishery business is suspected to be in an unsustainable condition if no sustainable management is carried out. Sustainability of the fisheries business can still be expected if changes are made to the business system which is more a combination of individual small-sized boats into group businesses with boats larger than 10 GT with more distant fishing grounds.

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