Comparison of fishing efficiency between biodegradable gillnets and conventional nylon gillnets

Grimaldo, Eduardo; Herrmann, Bent; Su, Bitao; Føre, Heidi Moe; Vollstad, Jørgen; Olsen, Leonore; Larsen, Roger B.; Tatone, Ivan

doi:10.1016/j.fishres.2019.01.003

Cited by 50 publications

(23 citation statements)

References 28 publications

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“…Perikanan No 86 tahun 2016 bahwa produktivitas kapal terkait dengan alat tangkap yang digunakan. Kapal ikan dengan alat tangkap besar yang terbuat dari nilon cenderung lebih efektif (Grimaldo et al, 2019) seperti Purse Seine besar dan kecil memiliki produktivitas 3 ton/thn/GT. Jaring Angkat (Bouke Ami dan Bagan Perahu) memiliki batasan produktivitas 1,97 ton/thn dan cenderung tinggi karena alat bantu (aggregating device) seperti lampu LED (Susanto, 2019) .…”

Section: Berdasarkan Keputusan Menteri Kelautan Danunclassified

Kajian Tingkat Efektifitas Perikanan Untuk Pengembangan Secara Berkelanjutan Di Provinsi Banten

Yonvitner¹,

Boer²,

Kurnia³

2020

JURNAL KEBIJAKAN PERIKANAN INDONESIA

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Efektifitas pengelolaan perikanan harus mempertimbangkan pola produksi dan produktivitas usaha penangkapan. Untuk itu penilaian terhadap efektivitas alat perlu dilakukan untuk menjamin keberlanjutan pengelolaan perikanan. Penelitian ini dilakukan di Provinsi Banten pada tahun 2018 dengan menggunakan data tahun 2003-2017. Analisis efektivitas penangkapan dengan mengunakan matrik analisis antara produksi dan produktivitas. Dan juga didukung dengan analisis statistik deskriptif terhadap sebaran hasil tangkapan. Hasil penelitian untuk kategori alat tangkap yang lebih efektif adalah Payang, Pukat Cincin, Jaring Insang, dan Bagan Perahu. Payang memiliki tingkat produksi 280.560 kg per tahun dan produktivitas 31.612 ton per tahun, Pukat Cincin memiliki produksi sebesar 517,341 ton per tahun dan produktivitas 44.986 per tahun, dan Jaring Insang pada tingkat produksi sebesar 1074.311 ton per tahun dan produktivitas 9.231 ton per tahun. Alat tangkap yang termasuk kategori tidak efektif adalah Sero, Jaring Udang, Rawai Hanyut dan Perangkap. Program rekonstruksi alat tangkap penting untuk mengurangi kapasitas penangkapan ikan dan meningkatkan ekonomi. Dalam hal ini, penelitian ini belum melibatkan skala ekonomi nelayan dalam aktivitas operasi sehari-hari.The effectiveness of fisheries management must consider the pattern of production and productivity of fishing businesses. For this reason, an assessment of the effectiveness of the tools needs to be carried out to ensure the sustainability of fisheries management. This research was conducted in Banten Province in 2018 using data from 2003-2017. Fishing effectiveness analysis using a matrix analysis between production and productivity. And also supported by using statistical analysis of the average value and distribution of catches. The results of the research for the more effective categories of fishing gear were Payang, Pure Seine, Gillnet Drift, and Boat Liftnet. Payang has a production rate of 280,560 kg per year and productivity of 31,612 tons per year, Purse seine has a production of 517,341 tons per year and productivity of 44,986 per year, and Gillnet Drift at a production rate of 1074,311 tons per year and productivity of 9,231 tons per year. The fishing gear included in the ineffective category is Sero, Shrimp net, Drifting Rawai and traps. The reconstruction program is important to reduce fishing capacity and improve the economic community. In this case, this study has not involved the economies of scale of fishermen in daily operations.

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Section: Berdasarkan Keputusan Menteri Kelautan Danunclassified

Kajian Tingkat Efektifitas Perikanan Untuk Pengembangan Secara Berkelanjutan Di Provinsi Banten

Yonvitner¹,

Boer²,

Kurnia³

2020

JURNAL KEBIJAKAN PERIKANAN INDONESIA

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“…The results showed that in some cases the fishing efficiency of these gears is similar to that of gears made of PA, PE, and PP. In Norway, biodegradable gillnets have shown a consistently lower catch efficiency than nylon PA gillnets, and this difference has been mainly attributed to the fact that biodegradable gillnets are made with 11-16% weaker monofilaments than nylon PA monofilaments of the same diameter [18][19][20]26]. The aim of the present study is to assess the effect of twine thickness tensile strength on the catch efficiency of biodegradable gillnets.…”

Section: Introductionmentioning

confidence: 96%

“…Biodegradable plastic is a plastic that maintains the same properties as a conventional plastic during use, but that can be completely degraded by naturally occurring microorganisms such as bacteria, fungi, and algae when disposed of in the environment [11]. The most investigated biodegradable plastics in fishing equipment and marine applications, i.e., aquaculture, are polybutylene succinate (PBS), polybutylene adipate co-terephthalate (PBAT), and polybutylene succinate co-adipate-coterephthalate (PBSAT) [12][13][14][15][16][17][18][19][20]. Commercial fishing products made of these materials are available in some countries, such as South Korea.…”

Section: Introductionmentioning

confidence: 99%

Effect of mechanical properties of monofilament twines on the catch efficiency of biodegradable gillnets

Grimaldo

Herrmann

Jacques³

et al. 2020

Preprint

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26Gillnets made of the biodegradable resin polybutylene succinate co-adipate-co-terephthalate 27 (PBSAT) were tested under commercial fishing conditions to compare their fishing performance 28 with that of conventional nylon polyamide (PA) gillnets. Both types of gillnets were made of 0.55 29 mm Ø monofilaments. However, since the biodegradable nets are weaker than nylon PA nets when 30 using the same monofilament diameter, we also used biodegradable nets made of 0.60 mm Ø 31 monofilament that had a similar tensile strength to the 0.55 mm Ø nylon PA nets. The relative catch 32 efficiency of the different gillnet types was evaluated over the 2018 autumn fishing season for saithe 33 and cod in northern Norway. For cod, both biodegradable gillnets (0.55 and 0.60 mm) had a 34 significantly lower catch efficiency compared to the traditional nylon PA net (0.55 mm) with 35 estimated catch efficiencies of 62.38% (CI: 50.55-74.04) and 54.96% (CI: 35.42-73.52) compared 36 with the nylon PA net, respectively. Similarly for saithe, both biodegradable gillnets (0.55 and 0.60 37 mm) had a lower estimated catch efficiency compared to the traditional nylon PA net (0.55 mm) 38 with estimated catch efficiencies of 83.40% (71.34-94.86) and 83.87% (66.36-104.92), compared 39 with the nylon PA net, respectively. Tensile strength does not explain the differences in catch 40 efficiency between the two gillnet types, since increasing the twine diameter of the biodegradable 41 gillnets (to match the strength of nylon PA gillnets) did not yield similar catch efficiencies. 42 However, the elasticity and stiffness of the materials may be responsible for the differences in catch 43 efficiency between the nylon PA and biodegradable gillnets. 44 45 Saithe. 47 50 Globally, gillnets are among the most commonly used fishing gears in developing and industrialized 51 countries [1]. In Norway, 26% and 16% of the total national allowable quota for Northeast Atlantic 52 cod (Gadus morhua) and saithe (Pollachius virens), which in 2019 was 385.000 and 203.368 tonnes 53 respectively, were caught with gillnets [2]. The Norwegian coastal fleet (with vessels shorter than 54 28 m) is responsible for approximately 99% of the gillnet landing of Northeast Atlantic cod. In 2019, 55 the coastal fleet consisted of 5978 vessels, with 81% of them being smaller than 14.9 m [3]. Despite56 the importance of the gillnet fishery, large numbers of gillnets are lost every year, causing 57 environmental problems such as ghost fishing and marine litter. Deshpande et al. [4] provided 58 annual loss rates of the six types of fishing gears used in Norwegian waters upon deployment, and 59 gillnets were the primary source of derelict gear. Although fisheries authorities lack a complete 60 overview of the amount of lost or derelict gillnets, estimates from the Norwegian Environment 61 Agency [5] suggest that 13,941 gillnets are lost each year. 62 63The impacts of derelict gillnets include continued catching of target and non-target species 64 (commonly known as ghost fishing),...

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“…Biodegradable plastic is a plastic that maintains similar properties as a conventional plastic during use, but that can be completely degraded by naturally occurring microorganisms such as bacteria, fungi, and algae when disposed of in the environment [11]. The most investigated biodegradable plastics in fishing equipment and other marine applications, i.e., aquaculture, are polybutylene succinate, polybutylene adipate co-terephthalate, and polybutylene succinate co-adipate-co-terephthalate [12][13][14][15][16][17][18][19][20]. Commercial fishing products made of these materials are available in some countries, such as South Korea.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that in some cases the fishing efficiency of these gears is similar to that of gears made of PA, polyethylene, and polypropylene. In Norway, biodegradable PBSAT gillnets have shown a consistently lower catch efficiency than nylon PA gillnets, and this difference has been mainly attributed to the fact that biodegradable gillnets are made with 11–16% weaker monofilaments than nylon PA monofilaments of the same diameter [ 18 – 20 , 26 ]. The aim of the present study is to assess the effect of twine thickness and tensile strength on the catch efficiency of biodegradable PBSAT gillnets.…”

Section: Introductionmentioning

confidence: 99%

Effect of mechanical properties of monofilament twines on the catch efficiency of biodegradable gillnets

et al. 2020

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Gillnets made of the biodegradable resin polybutylene succinate co-adipate-co-terephthalate were tested under commercial fishing conditions to compare their fishing performance with that of conventional nylon polyamide (PA) gillnets. Both types of gillnets were made of 0.55 mm Ø monofilaments. However, since the biodegradable nets are weaker than nylon PA nets when using the same monofilament diameter, we also used biodegradable nets made of 0.60 mm Ø monofilament that had a similar tensile strength to the 0.55 mm Ø nylon PA nets. The relative catch efficiency of the different gillnet types was evaluated over the 2018 autumn fishing season for saithe and cod in northern Norway. For cod, both biodegradable gillnets (0.55 and 0.60 mm) had a significantly lower catch efficiency compared to the traditional nylon PA net (0.55 mm) with estimated catch efficiencies of 62.38% (CI: 50.55-74.04) and 54.96% (CI: 35.42-73.52) compared with the nylon PA net, respectively. Similarly for saithe, both biodegradable gillnets (0.55 and 0.60 mm) had a lower estimated catch efficiency compared to the traditional nylon PA net (0.55 mm) with estimated catch efficiencies of 83.40% (71.34-94.86) and 83.87% (66.36-104.92), compared with the nylon PA net, respectively. Tensile strength does not explain the differences in catch efficiency between the two gillnet types, since increasing the twine diameter of the biodegradable gillnets (to match the strength of nylon PA gillnets) did not yield similar catch efficiencies. However, the elasticity and stiffness of the materials may be responsible for the differences in catch efficiency between the nylon PA and biodegradable gillnets.

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Comparison of fishing efficiency between biodegradable gillnets and conventional nylon gillnets

Cited by 50 publications

References 28 publications

Kajian Tingkat Efektifitas Perikanan Untuk Pengembangan Secara Berkelanjutan Di Provinsi Banten

Kajian Tingkat Efektifitas Perikanan Untuk Pengembangan Secara Berkelanjutan Di Provinsi Banten

Effect of mechanical properties of monofilament twines on the catch efficiency of biodegradable gillnets

Effect of mechanical properties of monofilament twines on the catch efficiency of biodegradable gillnets

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