scholarly journals Efficient Fishing Method to Control the Population of Rice Eel, Monopterus albus (Synbranchidae) in Rice Fields in Cagayan Valley, Philippines

2021 ◽  
pp. 228-245
Author(s):  
Evelyn Ame ◽  
Aeron Mayor
Keyword(s):  
Negative Impact ◽  
Control Measure ◽  
The Philippines ◽  
Rice Fields ◽  
Export Market ◽  
Net Income ◽  
Catch Per Unit Effort ◽  
Economic Point ◽  
Monopterus Albus ◽  
Fishing Gears

Rice eel (Monopterus albus) was introduced in the Philippines in 1905 as an aquaculture species without a thorough evaluation of its possible negative impact on the environment. In Cagayan Valley Region, it is being considered as a pest due to the economic loss it brought to farmers as it bore holes on the dikes, draining the water from the rice field, thus, contributing to the additional expense of the farmers. However, from the economic point of view, the species offered great potential as an export commodity due to its broad export market in East Asian countries. Hence, this study was conducted to determine the most efficient and effective method of controlling the proliferation of rice eel in rice fields in the Cagayan Valley region while preserving its integrity as an export commodity. Twelve (12) municipalities were chosen as the study sites based on validated reports of the high occurrence of rice eel. Three fishing methods, namely, fish trap (FT), hook and line (HL), and electrofishing (EF) gadget, were utilized. These gears were set during the dry and wet seasons. Catch and catch per unit effort (CPUE) were used to determine gear efficiency, while monetary values, net income, and ROI were used to assess the profitability of the gears. Results showed that electrofishing gadgets exhibit greater efficiency among the three fishing gears. The EF gadget also has the highest CPUE (4 individuals) per hour while only around 0–1 per hour for FT and HL. Seasonality does not affect the efficiency of the three fishing gears. Also, there is no significant interaction between seasons and fishing gears (p = 0.525). Computed annual net income and return on investment (ROI) is also greater using EF (PHP 407,630.40/ha/year with 569% ROI) compared to HL and FT (net incomes of PHP 113,244.68/ha/year and PHP 161,618.99/ha/year, and 261% and 309% ROI, respectively). However, the use of EF as a control measure should entail restrictions such that only within rice farm areas and not in open waters and only after harvest or before planting with issued EF licenses and permits from BFAR and local ordinances. Higher penalties should also be imposed for illegal use of EF such as use in open waters. As an alternative to EF, a combination of FT and HL with modifications or more environment-friendly fishing gears can be explored to catch and control the rice eel population.

Qarun Lake fisheries; Fishing gears, Species composition and Catch per unit effort

2014 ◽  
Vol 18 (2) ◽  
pp. 39-49
Author(s):  
Sabry El-Serafy ◽  
Alaa El-Haweet ◽  
Azza El-Ganiny ◽  
Alaa El-Far
Keyword(s):  
Species Composition ◽  
Catch Per Unit Effort ◽  
Unit Effort ◽  
Fishing Gears ◽  
Lake Fisheries

Technological Innovation and the Agricultural Sustainability

2016 ◽  
Vol 7 (2) ◽  
pp. 1-14
Author(s):  
Rachida Khaled ◽  
Lamine Hammas
Keyword(s):  
Technological Innovation ◽  
Energy Production ◽  
Agricultural Sector ◽  
Negative Impact ◽  
Agricultural Productivity ◽  
Agricultural Sustainability ◽  
Net Income ◽  
Agriculture Sector ◽  
The Impact

The diffusion of the technological innovation can affect the agricultural sector in the three-sided (social, economic and environmental), a hand, it can contribute to solve problems of the agricultural sector: the effects of the climatic changes, the farming exodus and the migration and the problems of poverty and it can improve the agricultural productivity. But on the other hand, he can lead to new problems, such as depletion of energy resources caused by excessive use of energizing technologies, pollution of air and water and the destruction of soil by industrial waste. This paper aims to theoretically and empirically analyze the role of technological innovation in improving agricultural sustainability through the impact of mechanization on agricultural productivity, energy production and net income per capita for a panel of three Maghreb countries (Algeria, Morocco and Tunisia) during the period 1997-2012. By using simultaneous equations, the authors' finding that technological innovation cannot achieve the purpose of sustainable development in the agriculture sector in the Maghreb countries through the negative impact of mechanization and research and development on agricultural productivity.

scholarly journals AN ASSESSMENT OF TEACHERS’ COPING MANAGEMENT OF PERCEIVED STRESS AND FEAR OF THE UNKNOWN

2021 ◽  
Vol 5 (2) ◽  
pp. 217
Author(s):  
Merissa Braza Ocampo
Keyword(s):  
Perceived Stress ◽  
Negative Impact ◽  
The Philippines ◽  
The Body ◽  
Educational Institutions ◽  
Body Of Knowledge ◽  
Educational Processes ◽  
Negative Impacts ◽  
Global Uncertainty

Amidst the burgeoning research currently conducted on the effects of COVID-19, this study looks particularly at teachers’ stress and anxiety during a time of heightened global uncertainty, which also strongly affects educational processes. The paper draws on data provided through online questionnaires, and follow-up interviews with teachers at a variety of educational institutions in Japan, the Philippines, and eight other countries. Findings from 100 respondents include details regarding the extent and distribution of various behaviors and emotional tendencies gained from quantitative analysis, and additional follow up questions, all conducted online. Numerous strategies for combatting the negative impact of COVID-19 are presented, and a variety of individual responses to this predicament is stressed. The study confirms that COVID-19 is having an unprecedented impact on education, affecting not only students but teachers as well. Thus, the study aims to both assist in alleviating the negative impacts on teachers’ wellbeing and to provide helpful insights that contribute to the body of knowledge on teachers’ coping management of perceived stress and anxiety.

scholarly journals AKTIVITAS PENANGKAPAN DAN DISTRIBUSI UDANG GALAH (Macrobrachium rosenbergii) DI DAERAH ALIRAN SUNGAI KAPUAS, KALIMANTAN BARAT

2017 ◽  
Vol 14 (2) ◽  
pp. 181
Author(s):  
Samuel Samuel ◽  
Siti Nurul Aida
Keyword(s):  
Macrobrachium Rosenbergii ◽  
Aquatic Organisms ◽  
Survey Method ◽  
Catch Per Unit Effort ◽  
West Kalimantan ◽  
Gill Net ◽  
Long Line ◽  
Fishing Gears ◽  
Descriptive Method ◽  
Dry And Rainy Seasons

Suatu riset yang bertujuan untuk mendapatkan data dan informasi tentang aktivitas penangkapan dan distribusi udang galah (Macrobrachium rosenbergii) di daerah aliaran Sungai Kapuas, Kalimantan Barat telah dilakukan dari bulan Juni sampai dengan Desember 2005. Riset dilaksanakan dengan metode survei dengan cara mendatangi lokasi-lokasi tempat ada aktivitas penangkapan udang galah (Macrobrachium rosenbergii). Frekuensi survei 2 kali pada musim kemarau dan 2 kali pada musim hujan. Wilayah perairan yang disurvei adalah daerah aliaran Sungai Kapuas dalam Kabupaten Pontianak, Kota Pontianak, Kabupaten Sanggau, dan Kabupaten Sintang. Data dianalisis dengan metode deskriptif dan tabulasi. Dari survei ditemukan 9 jenis alat tangkap yang digunakan nelayan untuk menangkap udang galah (Macrobrachium rosenbergii) yaitu pancing, rawai, bubu, jala, jaring, blad, rompong, stroom, dan pukat rantau. Catch per unit of effort terkecil terjadi pada alat tangkap bubu yaitu 1,39 g per per unit per jam, terbesar adalah jala yaitu 416,67 g per unit jala per jam. Intensitas penangkapan terlihat dominan di perairan bagian hilir mencakup wilayah Kabupaten dan Kota Pontianak. Distribusi ukuran bobot individu udang galah (Macrobrachium rosenbergii) yang banyak tertangkap oleh nelayan (nilai modus) dari 4 kali survei bervariasi antara 17,73 sampai dengan 40,00 g (Kabupaten Pontianak); 19,31 sampai dengan 47,01 g (Kota Pontianak), 17,79 sampai dengan 45, 35 g (Kabupaten Sanggau), dan antara 25,08 sampai dengan 85,52 g (Kabupaten Sintang). Kualitas air pada habitat tempat udang tertangkap di daerah aliaran Sungai Kapuas dalam batas-batas yang layak untuk mendukung kehidupan ikan dan udang. A study aimed to obtain recent data and information about capture activities and distribution of giant freshwater (Macrobrachiumrosenbergii) prawn in Kapuas River,West Kalimantan was conducted from June to December 2005. Survey method was used in each research stations that are Pontianak district, Pontianak City, Sanggau, and Sintang districts. The stations were selected based on fishing activities and habitat condition. Field survey was completed by conducting 4 times surveys including dry and rainy seasons. Data collected were analyzed by using tabulation and descriptive method. The results showed that there were 9 types of fishing gears commonly used to catch giant freshwater (Macrobrachium rosenbergii) prawn. These fishing gears were : hook and line, long line, pot traps, cast net, gill net, barrier traps, surrounding net, electrical fishing, and surrounding net. Catch per unit effort of the cast net was the highest (416,67 gr per unit per hour, whereas, pot trap was the lowest (1,39 g per unit per hour). Water quality in each stations indicated suitable for aquatic organisms. The capture intensity showed that in downstream(Pontianak District and Pontianak City) was more dominant than in upstream (Sanggau and Sintang Districts). Distribution of weight based on modus indicated variation in each stations, which are 17.73 to 40.00 g (Pontianak District), 19.31 to 47.01 g (Pontianak District), 17.79 to 45.35 g (Sanggau District),and 25.08 to 85.52 g (Sintang District).

scholarly journals Influence of green manure phytomass treatment by microbial preparations on grain productivity and quality indicators of winter wheat

2020 ◽  
Author(s):  
A.V. Prikhodko ◽  
◽  
I.A. Kameneva ◽  
A.I. Yakubovskaya ◽  
N.V. Karaeva ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Green Manure ◽  
Organic Fertilizer ◽  
Point Of View ◽  
Plant Residues ◽  
Net Income ◽  
Economic Point ◽  
Yield Increase ◽  
Stage Of Development ◽  
Biological Preparation

Treatment of the triticale phytomass with the complex biological preparation KBP-5M before incorporation into the soil contributed to the activation of microbiological processes in the 0-30 cm layer. In the variants when the plant was in the phenological stage of spike emergence, we noted an increase in the content of N-NO3 by 0.19-0.46 mg per 100 g of soil; Р2О5 – up to 2.97; K2О – up to mg/100 g. The reason for that was the maximum accumulation of organic matter in the phytomass of triticale at the aforementioned stage of development (8.25-8.52 t/ha). The use of KBP-5M had a positive effect on the development of winter wheat when green manure was the preceding crop. There is a tendency to increase the density of the stalk by 13.3 %, including productive stems – by 3.9 % and the number of grains from 10 plants – by 1.7 % compared to the use of triticale plants as an organic fertilizer without the treatment with biological preparation. Despite the trend of increasing yields from 4.32 to 4.43 t/ha, no reliable yield increase was obtained. When applying KBP-5M on triticale plant residues, there was an increase in protein content by 0.3 % and gluten – by 1.1 % compared to variants without the biological preparation. According to the indicators of 1000-grain weight and hectolitre weight, there were no significant differences between the studied variants. The use of KBP-5M has been justified from an economic point of view since 277 to 1535 rubles per ha of contingent net income was obtained and the payback ratio for the use of the biological product was 1.05–5.79.

scholarly journals ANALISIS TINGKAT PENDAPATAN MASYARAKAT NELAYAN SOMA PAJEKO DI KECAMATAN SALIBABU KABUPATEN KEPULAUAN TALAUD SULAWESI UTARA

2018 ◽  
Vol 6 (11) ◽  
Author(s):  
Siska Salatan ◽  
Victoria E.N. Manoppo ◽  
Suria Darwisito
Keyword(s):  
Secondary Data ◽  
Income Level ◽  
The Philippines ◽  
Economic Life ◽  
Purse Seine ◽  
Net Income ◽  
Community Group ◽  
North Sulawesi ◽  
Descriptive Method ◽  
Spatial Plan

AbstractTalaud Islands Regency includes maritime territory, 94.6% of which is waters directly adjacent to the Philippines and holds a variety of high economic living resources. In North Sulawesi Provincial Regulation Numbered 1/2017, article 12 concerning Zoning Plan of Coastal Zone and Small Islands of North Sulawesi Province 2017-2037, Talaud Islands Regency is designated as Integrated Marine and Fisheries Center Location of Talaud. It is located in Salibabu district, where Regional Regulation of Spatial Plan Numbered 1/2014 concerning Spatial Plan of Talaud Islands Regency for 2014-2034, Salibabu District is prioritized for Fishing Fisheries Regional Development and Management since its unutilized fisheries potential is still about 23,104 tons/year. In 2017, Salibabu district occupies the highest order for total fisheries production in Talaud Islands District. It was 702.3 tons or 11.79% of that in Talaud Islands Regency, 46.23% of which were gained from purse seines. Majority of the purse seine fishermen are those whose main livelihoods are fishermen and do not have other jobs. Fishing community is, in general, a relatively lagging community group socially, economically and culturally when compared with other community groups. The purse seine fishermen community in Salibabu district, in fact, still has mean income far below the minimum wage of Kabupaten Talaud, IDR. 1,500,000, -. The purse seine fisherman community in Salibabu district is still chained with poverty and backwardness. Therefore, there are needs for external intervention as an incentive to empower them in order to get out of the situation. This study used descriptive method, a method of studying the recent status of human groups, an object, a set of condition, a system of thinking or a class of events. Data collection consisted of primary and secondary data. It was done through in-depth interviews, filling questionnaires and literature studies. Respondents were purse seine fishermen communities in Salibabu district. Data analysis used descriptive method to know the socio-economic life of the communities and income formula to analyze the income level of fishermen purse seine. Results showed that mean net income in Salibabu district was approximately IDR 86,784,000/year for the purse seine owner and IDR.10,608,840/year for fishing crews, respectively, with main catches of skipjack tuna, mackerels, and scads. Keywords: Purse seine fisherman, Salibabu District and Income level of Fisherman AbstrakKabupaten Kepulauan Talaud termasuk wilayah bahari dimana 94,6% wilayahnya adalah perairan yang berbatasan langsung dengan negara Philipina dan memiliki sumberdaya hayati yang bernilai ekonomis tinggi. Dalam Peraturan Daerah Provinsi Sulawesi Utara No. 1 tahun 2017 pasal 12 tentang Rencana Zonasi Wilayah Pesisir dan Pulau-Pulau Kecil Provinsi Sulawesi Utara tahun 2017-2037, Kabupaten Kepulauan Talaud ditetapkan sebagai lokasi Sentra Kelautan dan Perikanan Terpadu. Lokasi tersebut terletak di Kecamatan Salibabu, dimana pada Perda RTRW (Rencana Tata Ruang Wilayah) No. 1 Tahun 2014 tentang Rencana Tata Ruang Wilayah Kab. Kepulauan Talaud Tahun 2014-2034, Kecamatan Salibabu diprioritaskan untuk Pengembangan dan Pengelolaan Kawasan Perikanan Tangkap karena potensi perikanan yang belum termanfaatkan ± 23.104 Ton/Tahun. Tahun 2017, Kecamatan Salibabu menempati urutan tertinggi untuk total produksi perikanan di Kabupaten Kepulauan Talaud. Total produksi perikanan Kecamatan Salibabu sebesar 702,3 ton atau 11,79 % dari keseluruhan produksi perikanan di Kabupaten Talaud. Dari total produksi tesebut 46,23 merupakan hasil produksi usaha soma pajeko. Mayoritas nelayan soma pajeko merupakan nelayan penuh yang mata pencaharian utamanya sebagai nelayan dan tidak memiliki pekerjaan lain. Masyarakat nelayan pada umumnya merupakan kelompok masyarakat yang relatif tertinggal secara sosial, ekonomi dan budaya bila dibandingkan dengan kelompok masyarakat lainnya. Demikian juga berlaku untuk masyarakat nelayan soma pajeko di Kecamatan Salibabu dimana penghasilan nelayan dibawah upah minimum Kabupaten kepulauan Talaud sebesar Rp. 1.500.000,-. Masyarkat nelayan soma pajeko di Kecamatan Salibabu masih terbelenggu oleh kemiskinan. Oleh karena itu dengan maksud bisa keluar dari kondisi tersebut perlu ada intervensi ekternal sebagai suatu dorongan untuk memberdayakan mereka.Penelitian ini menggunakan metode deskriptif, yaitu suatu metode dalam meneliti sekelompok manusia, suatu objek, suatu set kondisi, suatu system pemikiran ataupun suatu kelas peristiwa pada masa sekarang. Jenis data yang dikumpulkan terdiri dari data primer dan data sekunder. Pengumpulan data dilakukan melalui wawancara secara mendalam terhadap responden, pengisian kuesioner dan studi kepustakaan. Responden terdiri dari masyarakat nelayan soma pajeko di Kecamatan Salibabu. Analisis data menggunakan metode deskriptif untuk mengetahui kehidupan sosial ekonomi masyarakat dan analisis mengunakan rumus pendapatan digunakan untuk menganalisis tingkat pendapatan masyarakat nelayan soma pajeko.Hasil penelitian menunjukkan bahwa pendapatan bersih juragan soma pajeko di Kecamatan Salibabu rata- rata berkisar Rp86.784.000,-/tahun dan Rp. 10.608.840,-/tahun untuk pendapatan bersih masanae dengan hasil tangkapan utama berupa ikan Cakalang, Ikan Layang dan Ikan Tongkol.Kata kunci: Nelayan Soma Pajeko , Kecamatan Salibabu dan Tingkat Pendapatan

scholarly journals Towards a sustainable approach to wastewater treatment strategy for eutrophication abatement

2018 ◽  
Vol 45 ◽  
pp. 00056 ◽  
Author(s):  
Elena Neverova-Dziopak
Keyword(s):  
Wastewater Treatment ◽  
Aquatic Ecosystems ◽  
Aquatic Vegetation ◽  
Negative Impact ◽  
Point Of View ◽  
Negative Effects ◽  
Nitrogen And Phosphorus ◽  
Economic Point ◽  
The Public ◽  
Treatment Technologies

Eutrophication is one of the consequences of the negative anthropogenic impact on aquatic ecosystems. It leads to the degradation of both sweet and marine ecosystems, constituting a kind of secondary pollution of waters, which disturbs all types of their use. Undertakings related to preventing the negative effects of eutrophication are mainly conducted towards reducing the loads of nutrients introduced into surface waters and controlling the entire conditions in aquatic ecosystems in order to limit the development of aquatic vegetation. The increasingly restrictive legal requirement regarding the content of nitrogen and phosphorus in wastewater discharged into recipients enforces the application of expensive treatment technologies, and the public is becoming more aware of the rising costs of water and wastewater fees. In addition, wastewater treatment is a factor which has a negative impact on air quality due to greenhouse gas emissions and generates other environmental problems. The challenge for facilities, however, is determining which treatment alternatives will best meet their needs, both technically and financially, and to choose the most sustainable path. The problem of establishing a reasonable level of nutrient removal from wastewater, justified from an ecological and economic point of view is discussed in the paper.

Technological Innovation and the Agricultural Sustainability

2020 ◽  
pp. 1-16
Author(s):  
Rachida Khaled ◽  
Lamine Hammas
Keyword(s):  
Technological Innovation ◽  
Agricultural Sector ◽  
Negative Impact ◽  
Agricultural Productivity ◽  
Agricultural Sustainability ◽  
Net Income ◽  
Agriculture Sector ◽  
Per Capita ◽  
The Impact

The diffusion of the technological innovation can affect the agricultural sector in the three-sided (social, economic and environmental), a hand, it can contribute to solve problems of the agricultural sector: the effects of the climatic changes, the farming exodus and the migration and the problems of poverty and it can improve the agricultural productivity. But on the other hand, he can lead to new problems, such as depletion of energy resources caused by excessive use of energizing technologies, pollution of air and water and the destruction of soil by industrial waste. This paper aims to theoretically and empirically analyze the role of technological innovation in improving agricultural sustainability through the impact of mechanization on agricultural productivity, energy production and net income per capita for a panel of three Maghreb countries (Algeria, Morocco and Tunisia) during the period 1997-2012. By using simultaneous equations, the authors' finding that technological innovation cannot achieve the purpose of sustainable development in the agriculture sector in the Maghreb countries through the negative impact of mechanization and research and development on agricultural productivity.

scholarly journals Disinfection effect of povidone-iodine in aquaculture water of swamp eel (Monopterus albus)

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5523
Author(s):  
Xuan Chen ◽  
Chongde Lai ◽  
Yulan Wang ◽  
Lili Wei ◽  
Qiwang Zhong
Keyword(s):  
Povidone Iodine ◽  
Negative Impact ◽  
Iodine Content ◽  
Economic Loss ◽  
Luria Bertani ◽  
Toxicity Tests ◽  
Farmed Fish ◽  
Monopterus Albus ◽  
Aquaculture Water ◽  
Swamp Eel

The swamp eel (Monopterus albus) is an important commercial farmed fish species in China. However, it is susceptible toAeromonas hydrophilainfections, resulting in high mortality and considerable economic loss. Povidone-iodine (PVP-I) is a widely used chemical disinfectant in aquaculture, which can decrease the occurrence of diseases and improve the survival. However, environmental organic matter could affect the bactericidal effectiveness of PVP-I, and the efficacy of PVP-I in aquaculture water is still unknown. In this paper, disinfection assays were conducted to evaluate the effectiveness of PVP-I against theA. hydrophilain different types of water. We found that the effective germicidal concentration of PVP-I in outdoor aquaculture water was 25 ppm for 12 h. In indoor aquaculture water with 105CFU/mL bacteria, 10 ppm and 20 ppm of PVP-I could kill 99% and 100% of the bacteria, respectively. The minimal germicidal concentration of PVP-I in Luria-Bertani broth was 4,000 ppm. Available iodine content assay in LB solutions confirmed that the organic substance had negative impact on the effectiveness of PVP-I, which was consistent with the different efficacy of PVP-I in different water samples. Acute toxicity tests showed that the 24 h-LC50of PVP-I to swamp eel was 173.82 ppm, which was much higher than the germicidal concentrations in outdoor and indoor aquaculture water, indicating its safety and effectivity to control theA. hydrophila. The results indicated PVP-I can be helpful for preventing the transmission ofA. hydrophilain swamp eel aquaculture.

Creative approaches for generating growth using minimal resources

2020 ◽  
Vol 36 (12) ◽  
pp. 9-10
Keyword(s):  
International Business ◽  
Design Methodology ◽  
Business Models ◽  
Negative Impact ◽  
Export Market ◽  
Content Type ◽  
Pertinent Information ◽  
Industry Experience ◽  
Positive Effect ◽  
Practical Implications

Purpose This paper aims to review the latest management developments across the globe and pinpoint practical implications from cutting-edge research and case studies. Design/methodology/approach This briefing is prepared by an independent writer who adds their own impartial comments and places the articles in context. Findings This research paper clarifies that a coopetition-oriented mindset does drive coopetition-oriented behaviors. The results reveal that industry experience has a negative impact on the manifestation of coopetition-oriented behaviors, due a risk-related reticence in choosing suitable coopetition partners. Engaging in internationalization – for example, by partnering with a competitor to enter a foreign export market – with a coopetition-oriented mindset, has the positive effect of yielding further coopetition-oriented behaviors. Organizations involved in international business models are therefore more likely to partake in coopetition strategies. Originality/value The briefing saves busy executives, strategists and researchers hours of reading time by selecting only the very best, most pertinent information and presenting it in a condensed and easy-to-digest format.

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