scholarly journals CURRENT STATUS OF THE POLE-AND-LINE FISHERY IN EASTERN PART OF INDONESIA

2016 ◽  
Vol 22 (1) ◽  
pp. 43
Author(s):  
Agustinus Anung Widodo ◽  
Wudianto Wudianto ◽  
Fayakun Satria
Keyword(s):  
Current Status ◽  
Market Demand ◽  
Total Catch ◽  
Sampling Program ◽  
Management Area ◽  
Annual Total ◽  
Live Bait ◽  
Catch Rates

The promotion of pole-and-line fishery for a selective gear operating in the Indonesian tuna management area is considered as the proper policy in response to the increasing market demand with tuna eco-labeled. Appropriate information in addressing the current status of the pole-and-line fishery in Indonesia is an important step in order to support the promotion. Data used to describe the fishery were obtained through scientific port sampling program in collaboration between RCFMC and WCPFC in 2010 to 2014 and also scientific observer onboard program collaboration RCFMC and CRAC Co. Ltd. in 2013. The results show that presently the number of pole and line fleets was decreased significantly and remain about 232 fleetsin Sorong, Bitung and Kendari and Larantuka. The national annual total catch of pole-and line during 1980 – 2013 was recorded between 24,000 and 160,000 tons per year (average 98,117 tons per year). This value is estimated to contribute about 20% of Indonesia annual total catch of tuna in FMAs713-717. The pole-andline catch rates based at Bitung, Kendari and Sorong were fluctuated in each year with the range respective between 8.79 and 17.93 tons/trip/vessel, 4.78 and 5.36 ton/trip/vessel and about 7,99 ton ton/trip/vessel. Pole-and-line fishery operated in Indonesian FMAs 713-717 is considered as selective fishery, with > 80 % catches of skipjack in matured stage. The tuna-live bait fish ratio in Indonesian pole-and-line was 4.41 :1, then an improvement of live bait ratio as well as its management is required.

scholarly journals Current status of Iraqi artisanal marine fisheries in northwest of the Arabian Gulf of Iraq

2020 ◽  
Vol 5 (4) ◽  
pp. 457-464
Author(s):  
Abdul-Razak M. Mohamed ◽  
Abdullah N. Abood
Keyword(s):  
Arabian Gulf ◽  
Landing Site ◽  
Descriptive Statistics ◽  
Current Status ◽  
Total Catch ◽  
Marine Fisheries ◽  
Monthly Data ◽  
Management Measures ◽  
South Iraq ◽  
Annual Total

The study was conducted to analyze the fish landings from Iraqi artisanal marine fisheries, northwest Arabian Gulf from January 2017 to December 2019. The monthly data of fish landings were collected from the main landing site at Al-Fao port, south Iraq and were analyzed using descriptive statistics. A total of 35 taxa in 18 families were identified in the artisanal catches, in addition to two species of shrimps. The highest total landings were 11,944 t in 2018 and 11,305 t in 2019. The annual total landing of the marine fisheries increased by 270% during 2017-2019 as compared with the annual landing during 2008-2016. Threadfin bream contributed 14.1%, followed by river shad (11.1%) and mullets (11.1%), whereas shrimps formed 15.2% to the total catch. The overall values of biomass diversity of fish ranged from 1.82 in 2017 to 2.85 in 2018. There were 320 registered fishing boats motorized by 65 to 950 hp. Multi gears fishing were observed. The trends of the landings of all fish groups were increased substantially, except river shad, threadfin bream and shrimps. The study suggests some of the management measures must be put into place, especially for the river shad in the regions of their migration reproductive and the nursery.

scholarly journals Shore-based competitive recreational fisheries in southern Bahia, Brazil: A baseline study

2020 ◽  
Vol 33 (2) ◽  
pp. 183-203
Author(s):  
Katia Meirelles Felizola Freire ◽  
Felipe Pinto Nascimento ◽  
Gecely Rodrigues Alves Rocha
Keyword(s):  
Minimum Size ◽  
Current Status ◽  
Total Catch ◽  
Recreational Fisheries ◽  
Middle Aged ◽  
Baseline Study ◽  
Commercial Importance ◽  
Southern Bahia ◽  
Catch Composition ◽  
Main Factor

This study describes shore-based competitive fishing events in Ilhéus, southern Bahia (Brazil), including catch composition, and provides information on the profile of recreational fishers participating in these events. Information was collected in all events promoted by the Clube de Pesca de Ilhéus (CLUPESIL) in 2007-2008. A total of 26 competitive fishing events were organized during this period, with 47 species caught. The top species were: Cathorops spixii, Menticirrhus littoralis, Trachinotus goodei, Eucinostomus melanopterus, Polydactylus virginicus, Atherinella brasiliensis, and Eucinostomus argenteus. These seven species represented 87% of the total catch in number and 78% in weight. Menticirrhus littoralis and Polydactylus virginicus are species of commercial interest and their catch was dominated by juveniles. Local recreational fishers were predominately middle-aged men, who tended to use small hooks and mainly shrimp as bait. They were consumption-oriented, but also released small fishes. During competitions, fishers used even smaller hooks. Most of them perceived shrimp trawling as the main factor affecting recreational fisheries. The use of larger hooks and a minimum size of 20 cm are suggested to decrease the capture of juveniles, mainly those of commercial importance. This study sets a baseline from which new studies can be proposed to access the current status of local recreational fisheries.

scholarly journals Using catch rate data for simple cost-effective quota setting in the Australian spanner crab (Ranina ranina) fishery

2010 ◽  
Vol 67 (8) ◽  
pp. 1538-1552 ◽  
Author(s):  
Michael F. O'Neill ◽  
Alexander B. Campbell ◽  
Ian W. Brown ◽  
Ron Johnstone
Keyword(s):  
Decision Rules ◽  
Cost Effective ◽  
Catch Rate ◽  
Management Decision ◽  
Rate Data ◽  
Total Allowable Catch ◽  
Management Procedure ◽  
Annual Total ◽  
New Methodologies ◽  
Catch Rates

Abstract O'Neill, M. F., Campbell, A. B., Brown, I. W., and Johnstone, R. 2010. Using catch rate data for simple cost-effective quota setting in the Australian spanner crab (Ranina ranina) fishery. – ICES Journal of Marine Science, 67: 1538–1552. For many fisheries, there is a need to develop appropriate indicators, methodologies, and rules for sustainably harvesting marine resources. Complexities of scientific and financial factors often prevent addressing these, but new methodologies offer significant improvements on current and historical approaches. The Australian spanner crab fishery is used to demonstrate this. Between 1999 and 2006, an empirical management procedure using linear regression of fishery catch rates was used to set the annual total allowable catch (quota). A 6-year increasing trend in catch rates revealed shortcomings in the methodology, with a 68% increase in quota calculated for the 2007 fishing year. This large quota increase was prevented by management decision rules. A revised empirical management procedure was developed subsequently, and it achieved a better balance between responsiveness and stability. Simulations identified precautionary harvest and catch rate baselines to set quotas that ensured sustainable crab biomass and favourable performance for management and industry. The management procedure was simple to follow, cost-effective, robust to strong trends and changes in catch rates, and adaptable for use in many fisheries. Application of such “tried-and-tested” empirical systems will allow improved management of both data-limited and data-rich fisheries.

Anticipating adaptation: a mechanistic approach for linking policy and stock status to recreational angler behavior

2013 ◽  
Vol 70 (8) ◽  
pp. 1190-1208 ◽  
Author(s):  
Joshua K. Abbott ◽  
Eli P. Fenichel
Keyword(s):  
Mechanistic Model ◽  
Recreation Demand ◽  
Total Catch ◽  
Catch Per Unit Effort ◽  
Management Tools ◽  
Fish Stocks ◽  
Decision Context ◽  
Alternative Future ◽  
Catch Rates ◽  
Fishing Behavior

We use techniques from economic recreation demand modeling to develop a mechanistic model of individual recreational fishing behavior and estimate it using license-frame survey data. By consistently integrating individuals’ seasonal decisions of where, whether, and how much to fish, the model generates predictions of aggregate indicators such as angler-days and fishing mortality as phenomena arising from individual behavior. We use the model to simulate alternative future scenarios by altering policy variables or measures of fishing quality, such as catch rates. The mechanistic nature of the model incorporates anglers’ adaptive behavior to these stimuli, generating scenarios that are likely more robust to shifts in the decision context than many commonly used phenomenological models. We utilize the model to examine the sensitivity of total catch and catch per unit effort (CPUE) to changes in fish stocks, revealing substantial nonlinearities in this relationship. We also simulate total fishing trips, participation, CPUE, and total catch for a seasonal fishing permit versus a per-trip fee, finding dramatic differences across the two policies that call into question the wisdom of permit fees as management tools.

scholarly journals Oak pollen concentration in the air of selected Polish cities in 2020

Alergoprofil ◽  
2020 ◽  
Vol 16 (4) ◽  
pp. 15-20
Author(s):  
Anna Rapiejko ◽  
Małgorzata Malkiewicz ◽  
Monika Ziemianin ◽  
Aneta Sulborska ◽  
Kazimiera Chłopek ◽  
...  
Keyword(s):  
Pollen Season ◽  
Pollen Grains ◽  
Volumetric Method ◽  
Pollen Concentration ◽  
Total Catch ◽  
Pollen Concentrations ◽  
Oak Pollen ◽  
Annual Total ◽  
High Concentrations

The study aims to compare the oak pollen season in selected Polish cities; Bialystok, Bydgoszcz, Cracow, Katowice, Piotrkow Trybunalski, Lublin, Olsztyn, Opole, Szczecin, Warsaw, and Wroclaw in 2020. Measurements were made using the volumetric method, with a Hirst-type sampler. Oak pollen season, defined as the period with 98% of the annual total catch, started between 14 (in Opole) and 25 April (in Lublin). The season ended on 1 June at the latest;  in Sosnowiec, Bydgoszcz, Olsztyn, and Bialystok. It lasted from 30 to 47 days  (37 days on average). The maximum daily oak pollen concentrations were observed between 24 April and 11 May. The highest annual sum of oak pollen grains (SPI) was recorded in Lublin, while the lowest in Bialystok. The highest concentrations of 596 oak pollen grains/m3 were noted in Lublin on 28 April. The longest exposure to high concentrations of oak pollen (>91 grains/m3), lasting 12-13 days, was recorded in Lublin, Opole, and Wroclaw.

scholarly journals ASPEK BIOLOGI DAN MUSIM PENANGKAPAN LOBSTER (Panulirus spp) DI PERAIRAN KUPANG NUSA TENGGARA TIMUR

2018 ◽  
Vol 23 (3) ◽  
pp. 167
Author(s):  
Setiya Triharyuni ◽  
Ngurah N Wiadnyana
Keyword(s):  
Sex Ratio ◽  
Rainy Season ◽  
Spiny Lobster ◽  
Foreign Market ◽  
Market Demand ◽  
Total Catch ◽  
Fishing Season ◽  
Catch Data ◽  
Lobster Fishery ◽  
First Maturity

Lobster merupakan komoditas perikanan andalan yang banyak dieksploitasi di perairan Kupang untuk memenuhi permintaan pasar dalam dan luar negeri. Hal ini menyebabkan kegiatan penangkapan lobster berlangsung sangat intensif. Penelitian ini bertujuan untuk menganalisis aspek biologi dan musim penangkapan lobster. Data dan informasi yang dikumpulkan meliputi ukuran panjang karapas dan berat serta jenis kelamin tiap-tiap jenis lobster yang tertangkap serta hasil tangkapan dan upaya yang dilakukan secara bulanan. Data tangkapan lobster yang dianalisis dicatat selama periode Oktober 2015 - Desember 2016. Hasil penelitian menunjukkan bahwa  terdapat empat jenis lobster dari kelompok Palinuridae, yaitu lobster bambu (P. versicolor), lobster batu (P. penicillatus), lobster pasir (P. homarus) dan lobster mutiara (Panulirus ornatus). Berdasarkan jumlah individu, tangkapan lobster bambu mendominasi yaitu sekitar 60 % dari tangkapan total. Secara umum ukuran dari semua jenis lobster sesuai dengan ketentuan yang diatur dalam peraturan perundang undangan. Nisbah kelamin yang seimbang dan ukuran rata-rata pertama kali tertangkap lebih besar dari setengah panjang infinitif dan panjang pertama matang gonad menunjukkan bahwa sumber daya lobster masih layak untuk dieksploitasi. Musim penangkapan losbter di wilayah Kupang ini secara umum terjadi pada periode musim penghujan yang mulai dari September sampai Februari. Pembinaan kepada nelayan perlu ditingkatkan agar nelayan tetap patuh pada peraturan perundangan yang berlaku, bahkan dapat diikuti dengan nelayan di wilayah lainnya. Lobster fishery commodity in Kupang. Many lobsters are exploited in these waters to meet domestic and foreign market demand. This led to lobster fishing activities very intensive. The research on lobster resources was conducted to analyze the biology aspect and lobster fishing season. Data included, length of the carapace, individual weight, sex of lobsters and the monthly catches and efforts. The lobster catch data analyzed were recorded during the period of October 2015 - December 2016. The results show that there were four species of lobster from the Palinuridae group,i.e:the ornate spiny lobster (Panulirus ornatus), pronghorn spiny lobster (P. penicillatus), scalloped spiny lobster (P. homarus) and painted spiny lobster (P. versicolor). The catch was dominated by P. versicolor with 60% of the total catch. Generally the size of all lobster species with the regulation concerning the lobster fishing. The balance of sex ratio and the size of Lc of more than 0,5 of Land more than length at first maturity indicates that the lobster resource in Kupang and surrounding waters  is still exploited. The losbter fishing season is generally in the rainy season period from September to february. The increase of guidance to fishermen is needed to keep the fishermen the law and regulations, even can be followed by fishermen in other areas.

scholarly journals Stock mapping, size structure and biological parameters of the clam Polititapes aureus in the shellfish production area of the southern Tunisian waters (Central Mediterranean)

2021 ◽  
Vol 50 (2) ◽  
pp. 128-136
Author(s):  
Abdelkarim Derbali ◽  
Othman Jarboui
Keyword(s):  
Size Structure ◽  
Current Status ◽  
Fishing Industry ◽  
Market Demand ◽  
Artisanal Fishery ◽  
Ecological Role ◽  
Central Mediterranean ◽  
Production Area ◽  
Exploitation Status

Abstract The clam Polititapes aureus is one of the most abundant shellfish species in the southern Tunisian waters. Its current exploitation status and management are becoming a major concern for fishing industry in Tunisia. The significant ecological role of the species and possible future commercial benefits require a better knowledge of its stock. This research is the first attempt to investigate its current status in an area with the largest shellfish production. The obtained results showed a scattered distribution. The stock density ranged from 0 to 124 ind. m−2, and biomass values varied from 0 to 300 g m−2. This results in a remarkable biomass of 201.2 (± 64.6) t and high abundance reaching 91.3 ± 32.9 million individuals, estimated an area of 4182 ha. The species distribution was also investigated, with the size ranging from 4.9 to 35.34 mm. The overall sex ratio (F:M) was 1.26:1, which significantly deviated different from parity (1:1). The main environmental factors were identified and several abiotic parameters were found to strongly affect the spread of the clam species. The clam reproduce well and is expected to almost meet the domestic market demand through artisanal fishery.

scholarly journals Organic Vegetable Production in California—Science and Practice

2000 ◽  
Vol 10 (4) ◽  
pp. 699-713 ◽  
Author(s):  
Mark Gaskell ◽  
Benny Fouche ◽  
Steve Koike ◽  
Tom Lanini ◽  
Jeff Mitchell ◽  
...  
Keyword(s):  
Weed Management ◽  
Current Status ◽  
Vegetable Production ◽  
Market Demand ◽  
Insect Management ◽  
Farm Production ◽  
Organic Vegetable Production ◽  
Plant Disease Management ◽  
Key Aspects ◽  
Organically Grown

This article summarizes the current status of organic vegetable production practices in California. The production of vegetables organically is growing rapidly in California, led in large part by growth in the market demand for organically grown produce. Key aspects of organic vegetable production operations such as certification and farm production planning, soil management, weed management, insect management, and plant disease management involve special practices. Many practices have not been thoroughly researched and the scientific base for some practices is still being developed.

scholarly journals Alternaria spores in the air of selected Polish cities in 2020

Alergoprofil ◽  
2021 ◽  
Vol 17 (1) ◽  
pp. 21-24
Author(s):  
Katarzyna Dąbrowska-Zapart ◽  
Kazimiera Chłopek ◽  
Agnieszka Lipiec ◽  
Małgorzata Puc ◽  
Małgorzata Malkiewicz ◽  
...  
Keyword(s):  
Threshold Concentration ◽  
Volumetric Method ◽  
Total Catch ◽  
Airborne Concentration ◽  
Annual Total

The study compares the course of the spore season of Alternaria in Bialystok, Cracow, Olsztyn, Piotrkow Trybunalski, Sosnowiec, Szczecin, Warsaw, and Wroclaw in 2020. The investigations were conducted using the volumetric method. Alternaria spore season was defined as the period in which 90% of the annual total catch occurred. The Alternaria season started first in Bialystok on May 19 and lasted on June 28 in Wroclaw. The highest airborne concentration of 1052 Alternaria spores/m3 was noted in Wroclaw on July 30. The highest annual sum of Alternaria spores (SPI) was observed in Warsaw (19 390 spores) and the lowest in Bialystok (5769 spores). Most days, the threshold concentration inducing symptoms in allergic persons occurred in Piotrków Trybunalski, Szczecin, and Warsaw.

Economics of Fishery Management

1973 ◽  
Vol 30 (12) ◽  
pp. 2042-2050 ◽  
Author(s):  
J. A. Gulland ◽  
M. A. Robinson
Keyword(s):  
Fishery Management ◽  
Excessive Amount ◽  
Unit Weight ◽  
Excess Capacity ◽  
Total Catch ◽  
Advantages And Disadvantages ◽  
Unit Costs ◽  
Total Capacity ◽  
Catch Rates

In an unmanaged fishery the costs of catching a unit weight of fish will tend to rise until they are equal to the value of the catch. There is likely to be an excessive amount of fishing which adds to the costs, but adds little or nothing to the total catch, and may even decrease it. In practice the amount of fishing will often exceed the equilibrium, due to delays in reacting to falling catch rates, year-to-year fluctuation in the fishery, etc. The labor and capital engaged in fishing is often relatively immobile, and once excess capacity has developed it is not easily reduced without special measures.A number of different measures are available to control both the amount of fishing and the sizes of the fish caught. These are outlined, and the advantages and disadvantages briefly discussed. Several of the methods of controlling the amount of fishing tend to add to unit costs, and therefore offer little long-term benefits. These benefits can only be assured by control of the total capacity engaged in a fishery, such as through allocation of shares to individual countries in an international fishery, or by license limitation in a national fishery.

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