Fish Squid Research Articles

Совершенствование промысла тихоокеанского кальмара (Todarodes pacificus)с использованием источников света

The paper identifies the factors that did not allow the effective domestic fishing of Pacific squid to be practically realized, a con-cept has been developed that allows solving the tasks of this fishery, taking into account the advance of the level of development of modern fishing. The concept of improving the squid's thinking was developed based on the work of the authors of the models and a new approach to the design of LED lamps with a choice of diodes (495 nm wavelength) was proposed, allowing to main-tain the efficiency of extraction on conventional vessels, as on specialized squid fishing vessels, as well as to regulate the depth of light penetration while preserving the squid attraction zone.

Behavior Recognition of Squid Jigger Based on Deep Learning

In recent years, with the development of pelagic fishing, the working environment and monitoring of crew (squid jigger) members have become increasingly important. However, traditional methods of pelagic human observers suffer from high costs, low coverage, poor timeliness, and susceptibility to subjective factors. In contrast, the Electronic Monitoring System (EMS) has advantages such as continuous operation under various weather conditions; more objective, transparent, and efficient data; and less interference with fishing operations. This paper shows how the 3DCNN model, LSTM+ResNet model, and TimeSformer model are applied to video-classification tasks, and for the first time, they are applied to an EMS. In addition, this paper tests and compares the application effects of the three models on video classification, and discusses the advantages and challenges of using them for video recognition. Through experiments, we obtained the accuracy and relevant indicators of video recognition using different models. The research results show that when NUM_FRAMES is set to 8, the LSTM+ResNet-50 model has the best performance, with an accuracy of 88.47%, an F1 score of 0.8881, and an map score of 0.8133. Analyzing the EMS for pelagic fishing can improve China’s performance level and management efficiency in pelagic fishing, and promote the development of the fishery knowledge service system and smart fishery engineering.

Fishing Behavior Detection and Analysis of Squid Fishing Vessel Based on Multiscale Trajectory Characteristics

Accurate fishing activity detection from the trajectories of fishing vessels can not only achieve high-precision fishery management but also ensure the reasonable and sustainable development of marine fishery resources. This paper proposes a new method to detect fishing vessels’ fishing activities based on the defined local dynamic parameters and global statistical characteristics of vessel trajectories. On a local scale, the stop points and points of interest (POIs) in the vessel trajectory are extracted. Voyage extraction can then be conducted on this basis. After that, multiple characteristics based on motion and morphology on a global scale are defined to construct a logistic regression model for fishing behavior detection. To verify the effectiveness and feasibility of the method, vessel trajectory data, and fishing log data collected from Chinese ocean squid fishing vessels in Argentine waters in 2020 are integrated for fishing operation detection. Multiple evaluation metrics show that the proposed method can provide robust and accurate recognition results. Moreover, further analysis of the temporal and spatial distribution and seasonal changes in squid fishing activities in Argentine waters has been performed. A more refined assessment of the fishing activities of individual fishing vessels can also be provided quantitatively. All the results above can benefit the regulation of fishing activities.

Unregulated squid fishing.

Unregulated squid fishing.

HOOK RATE RAWAI DASAR LAYANGAN (RDL) STUDI PRODUKTIVITAS RAWAI DASAR YANG DIMODIFIKASI DI PERAIRAN SELAT LEMBEH BITUNG SULUT

The research objectives were (1) to examine the difference of productivity level of the catch (hook rate) between the flying bottom longline (RDL) and the conventional bottom longline. (2) record the type and amount of catch. The flying bottom longline (RDL) in this study is a modified construction design of bottom long line, by shortening the branch line and reducing its distance on the main line. The fishing method was changed by spreading the main line on the bottom of the sea. Thus each branch line and hooks will float to the mid surface by taking advantage of the movement of the ocean currents. The research was conducted in August-October 2020 in the waters of the Lembeh Strait, Bitung City, North Sulawesi. The research method used was 6 fishing trips trials. The results of this study indicate that the normality and homogeneity test of the hook rate data distribution is obtained 0.635 for residual value of data normality and a 0.732 of residual value of homogenity, so the data is normally distributed and homogeneous The hook rate on the flying bottom longline (RDL) operated at a depth of 10 m with fresh squid fish bait illustrates that the flying bottom longline hook rate (RDL) is higher than the conventional bottom longline (Rdk). The same thing happened at a depth of 20 m. The hook rate of the flying bottom line (RDL) was higher than that of the conventional bottom line (RDK). The effect of fresh squid bait shows a significant difference in the amount of catch between RDL and RDK. There is a significant difference between RDL and RDK when using decapterus bait. There is no significant difference between the depths of 10 meters and 20 meters on the amount of fish catch. The number of fish species caught using the flying bottom longline (RDL) is eleven species of demersal fish. Total catch using conventional bottom longlines (RDK) is eight species of demersal fish. Keywords: bait; branch line, flying bottom longline; main line, productivity

SHUTTER OPERATION AND IRADIUM SQUID FISHING ON HANDLINE TUNA FISHING FOR SUSTAINABILITY

handline is an environmentally friendly and low-cost fishing gear. This fishing gear can be modified so that it can reduce the operational and environmental impact of service partners as many as 10 people are representatives of handline fishermen, Pulau Raam Village. The material given is in the form of understanding sustainable fisheries, shutter fishing, and iradium squid fishing. Evaluation of the results of socialization by conducting question and answer interactions was obtained. Most of them understood the material given.

Third party fishing in an undelimited area under the Republic of Korea–Japan Fisheries Agreement

Third party vessels have recently been challenging a 1998 ROK–Japan fisheries order by fishing in the two sides’ undelimited EEZs. This article identifies the rights/powers that the ROK and Japan can exercise in relation to third party fishing before the geographical scope for the exercise of their sovereign rights is definitely established. Legal questions concerning this fishing remain unresolved in the absence of a specific provision in the ROK–Japan fisheries agreement. Thus, this article examines two legal issues arising from the DPRK’s and China’s squid fishing in the East Sea/Sea of Japan: (1) the ROK’s and Japan’s right to grant a fishing license to a third party and (2) their power to exercise law enforcement against third party fishing vessels. This article ascertains the existence of these two states’ implied rights concerned under their bilateral agreement. Article 74(3) of the UN Convention on the Law of the Sea is also interpreted to verify the compatibility of both states’ behavior regarding third party fishing with this provision. The findings of this article are expected to provide insights not only for China, Japan and the two Koreas but also for other states with third party fishing issues in their undelimited areas.

ANALYSIS OF SUPPLY CHAIN MANAGEMENT OF SQUID SEA FISH IN TRADITIONAL FISHERMAN IN VILLAGE OF FISHERMAN INDAH MEDAN

This study states that the implementation of the squid sea fish supply chain in the Nelayan Indah Village, Medan Labuhan District, Medan City, is still controlled by collectors, the demand for squid fish in the Nelayan Indah Village, Medan Labuhan District, Medan City is still very high and the supply of fish squid sea depends on the harvest season, weather, techniques and technology used in fishing vessels, and pricing of squid fish in the Nelayan Indah Village Medan Labuhan District Medan City based on the demand and supply.

TRENDS OF PROCESSED PRODUCTS OF SQUID

Currently, technologies that allow to preserve the native properties of raw materials in the finished product as much as possible thanks to the soft modes of technological processes deserve special attention. An important condition for obtaining healthy food products is the availability of a raw material base and technical means of extracting aquatic biological resources. The article shows that in China, a healthy lifestyle and the consumption of healthy food products are gaining popularity. China is a country that demonstrates absolute dominance in the production of shellfish, both aquaculture and in squid fishing. Despite this, there is a shortage of healthy food products in the domestic food market in China due to the uneven distribution of aquatic bioresources. The main type of processed shellfish are squids, which are traditionally very popular in China. In addition to frozen processed squid and other primary processed products, the main products from squid are minced squid, sliced squid and chopped squid, as well as various types of canned food. The article shows the high nutritional and biological value of squid, which is provided by high-grade proteins and essential polyunsaturated fatty acids. But when processing squids, a number of problems arise associated with the deterioration of organoleptic properties and a decrease in the biological value of the finished product. This article is a review and reveals a number of issues related to the features of the fractional composition of muscle tissue proteins of various raw materials. Also analyzed the changes in the physico-chemical parameters of proteins in a wide range of temperature effects. The article presents a promising type of technological processing, which allows to eliminate certain disadvantages of traditional technologies such as hard, dry consistency, weight loss of the finished product, as well as the loss of valuable extractive substances that provide organoleptic properties of food products. Such technologies with minimal impact on the technological properties of the finished product include SousVide technology. SousVide is a technology of low-temperature preparation of food products in a vacuum, which allows reliable monitoring of sensory performance and microbiological safety of products with strict observance of technological regulations.

Kajian Efektivitas Penggantian Alat Tangkap Cantrang Menjadi Gillnet Millenium di Banyutowo, Pati, Jawa Tengah

This study’s background was based on the prohibition of cantrang’s operation. To reduce impact of this ban, the Government was replacing cantrangs with another fishing gears which are considered more environmentally friendly. In Banyutowo, Pati Residence, “cantrang” was replaced with Gillnet Millennium. This study aims to determine the pattern of fishing season of some of the dominant fish species caught around Banyutowo and to analyze the effectiveness of replacing fishing gear, from cantrangs into gillnet millenium at Banyutowo. The fishing season indeks was analyzed using the moving average method. The types of fish analyzed in this study were the dominant fish caught in the Banyutowo waters with cantrang and gillnet such as Kuniran, Squid, Pari, Manyung, Beloso, Kuro and Tigawaja fish. Analysis of the effectiveness of replacing cantrang with the gillnet millenium in Banyutowo was carried out at the process, and output stages. The results showed that some of the most landed fish in PPI Banyutowo had different fishing seasons. The peak season for fishing in Banyutowo occurs in December (West season) and lowest in July (East season). The evaluation of the effectiveness of replacing cantrang into the gillnet millennium in Banyutowo at the process stage shows ineffective results, and at the output stage shows very ineffective results.

STRATEGI PENGEMBANGAN PERIKANAN CUMI DI PELABUHAN PERIKANAN SAMUDERA CILACAP

Pelabuhan Perikanan Samudera Cilacap (PPS) adalah Pelabuhan yang dikenal memiliki potensi sumberdaya ikan melimpah. Hasil tangkapan cumi di PPS Cilacap merupakan jenis cumi-cumi yang belum layak di ekspor dikarenakan penanganan cumi masih kurang bagus untuk ukuran dan bentuk cumi-cumi masih belum baik. Tujuan dari penelitian ini menghitung keuntungan usaha perikanan cumi, menganalisis musim penangkapan cumi, serta menyusun strategi pengembangan perikanan cumi di PPS Cilacap. Metode analisis yang digunakan analisis finansial, indeks musim penangkapan, dan metode SWOT. Pengumpulan data dengan pengambilan responden dilakukan secara purposive sampling untuk mendapatkan data terkait faktok internal (kekuatan dan kelemahan) dan faktor eksternal (peluang dan ancaman). Hasil penelitian menunjukkan bahwa keuntungan yang diperoleh oleh nelayan cumi di Pelabuhan Perikanan Samudera Cilacap selama setahun sebesar Rp2.330.520.000,00 dengan R/C ratio senilai 1,27 sehingga usaha perikanan cumi menguntungkan. Musim penangkapan cumi tertinggi yaitu terjadi pada bulan Juli hingga Agustus dan bulan Januari hingga Febuari. Strategi pengembangan perikanan cumi diantaranya mengatur penangkapan cumi, meningkatkan teknologi tepat untuk penangkapan maupun pengelolaan, meningkatkan kapal penangkapan khusus cumi, meningkatkan unit penangkapan, mengoptimalkan perikanan cumi dapat di ekspor, mengoptimalkan permintaan pasar, melakukan sosialisasi kepada nelayan untuk membantu meningkatkan pengetahuan nelayan akan kegiatan pengembangan perikanan berkelanjutan, meningkatkan pengelolaan agar lebih bermaanfaat.
 Kata kunci: cumi-cumi, perikanan cumi, Pelabuhan Perikanan Samudera Cilacap, strategi pengembangan, usaha perikanan cumi

STRATEGI PENGEMBANGAN PERIKANAN TANGKAP TERPADU BERBASIS SUMBERDAYA UNGGULAN LOKAL: STUDI KASUS PERIKANAN CUMI DI KABUPATEN BANGKA SELATAN

Cumi merupakan potensi perikanan yang bernilai ekonomis penting di Kabupaten Bangka Selatan. Permintaan komoditas ini baik dalam bentuk segar maupun olahan diperkirakan terus mengalami peningkatan dimasa mendatang. Penelitian ini bertujuan untuk menganalisis kontribusi perikanan cumi, menganalisis basis pengembangannya, serta merumuskan strategi pengembangannya di Kabupaten Bangka Selatan. Penelitian ini menggunakan metode deskriptif, analisis LQ, dan metode AHP. Selama periode 2009-2016, produksi perikanan cumi di Kabupaten Bangka Selatan rata-rata 4187,87 ton dengan nilai kontribusi mencapai Rp87.736.058.000,00 setiap tahunnya. Wilayah basis pengembangan perikanan cumi menggunakan: (1) bagan tancap adalah Kecamatan Tukak Sadai, Kecamatan Lepar Pogok, dan Kecamatan Toboali, (2) bagan perahu adalah Kecamatan Kepulauan Pongok, dan (3) pancing cumi adalah Kecamatan Simpang Rimba, Kecamatan Batu Betumpang, Kecamatan Toboali, dan Kecamatan Lepar Pongok. Strategi prioritas pengembangan adalah pembinaan sumberdaya manusia perikanan cumi (prioritas I) dan perbaikan manajemen usaha perikanan cumi (prioritas II) di setiap wilayah basis pengembangan perikanan cumi.

Squid ink and its pharmacological activities

With the development of technical instruments the isolation and characterization of many natural products from marine and freshwater organisms, promotes a major advancement of discovery of these aquatic derived compounds. Due to the increasing demand of medicines from natural products, many researches on marine products are going on and is still a undiscovered journey. One such product is squid ink obtained from squid fish which is present in Mediterranean and Atlantic Ocean. It is mainly contained of melanin and many degradation studies have proven and still for the research work. The squid ink has spectacular activities in many ailments like uterine dysfunction, anticancer activity, antimicrobial activity, anti-inflammatory activity along with hypertensive effects. It has a very special place in homeopathic medicine and in traditional Chinese medicine due to its therapeutic uses. Hence it is believed that the squid ink can be used as a better tool against these dysfunctions. The present review aims to assemble various pharmacological activities of squid ink although deeper insight in its pharmacological potential is required.

High electrochemical capacitor performance of oxygen and nitrogen enriched activated carbon derived from the pyrolysis and activation of squid gladius chitin

Activated carbon containing nitrogen functionalities exhibits excellent electrochemical property which is more interesting for several renewable energy storage and catalytic applications. Here, we report the synthesis of microporous oxygen and nitrogen doped activated carbon utilizing chitin from the gladius of squid fish. The activated carbon has large surface area of 1129 m2 g−1 with microporous network and possess ∼4.04% of nitrogen content in the form of pyridinic/pyrrolic-N, graphitic-N and N-oxide groups along with oxygen and carbon species. The microporous oxygen/nitrogen doped activated carbon is utilize for the fabrication of aqueous and flexible supercapacitor electrodes, which presents excellent electrochemical performance with maximum specific capacitance of 204 Fg−1 in 1 M H2SO4 electrolyte and 197 Fg−1 as a flexible supercapacitor. Moreover, the device displays 100% of specific capacitance retention after 25,000 subsequent charge/discharge cycles in 1 M H2SO4 electrolyte.

İzmir Körfezi’nde olta ile kalamar (Loligo vulgaris) avcılığı yapan balıkçıların sosyo-ekonomik analizi

This study, assessing the socio-economic status of small scale and recreational line squid fishers in Izmir Bay, was carried out between September 2010 and September 2011 in the area between Karaburun and Yeni Foça line. Fishers in the sample size were determined by simple random sampling method. A survey was later carried with these fishers as well as with the managers of the local fishery cooperatives. The ban on coastal trawl nets such as seine nets and drag nets in 2001 has led to a decrease in the amount of squid caugth in the Izmir Bay, resulting in steeper prices due to imbalanced supply&demand patterns (15-25 TL/kg). In this period, use of fishing jigs in squid fishing were observed to have increased. Survey results revealed that there are fishers in the Izmir Bay living solely on squid fishing and the rods they specifically modified for squid have become commercial gears, enabling higher catch efficiency (min.1, max. 41 kg/day/disher) and catch value (min 15 TL - max 1.025 TL/day/fisher). This study has revealed the emergence of a new type of fishermen whose demographic and socio-economic features are shaped according to the change in squid fishing in the Izmir Bay. The fact that the traditional fishing rod has gained a “recreational” and “commercial disguised as recreational” function in the Izmir Bay squid fishing should be considered as a significant development in terms of fisheries management.

秋刀鱼、鱿鱼兼作渔船集鱼灯选型及优化配置研究

以国内设计的一艘总长77.5 m、型宽11.4 m的大型专业秋刀鱼渔船为目标渔船，综合考虑该渔船的发电机组配备，对该船的秋刀鱼集鱼灯系统和鱿鱼钓集鱼灯系统进行选型和配置。研究表明：对于秋刀鱼集鱼灯系统，主要使用的灯泡为日本生产的110 V 500 W型白炽灯，以红灯为主，部分灯箱使用白光和绿光，共配备133组灯，灯箱灯距为1.2 m，灯箱安装角度为55˚~70˚；对于鱿钓集鱼灯系统，主要使用的灯泡为日本生产的220 V 3 kW型金卤灯，光色为白色，共配备260个集鱼灯，两侧各130个均匀排列，相邻灯间距为0.52 m，集鱼灯安装高度为距离水面7.4 m。 A domestic-designed professional saury fishing vessel, with 11.4 m beam and hull 77.50 m length, was selected as study objective. First, synthetically the configuration of vessel generating units was taken into consideration to select saury and squid fish aggregation lamps systems. Then, we do research on optimization allocation of the above systems. The results indicate that for saury fish aggregation lamps systems, main light source we selected is Japanese-made to the incandescent lamp (110 Voltage & 500 Watt). The main lamp color selected is red and rest consists of white and green. Vessel was equipped by 133 light boxes and the distance between each other is 1.2 meter. The angle between light box and shipboard is 55˚ - 70˚. For squid fish aggregation lamps systems, main light source we selected is Japanese-made to the Metal Halide Lamp (220 Voltage & 3 k Watt). The main lamp color selected is white. Vessel was equipped by 260 lamps (130 lamps each side) and the distance between each lamp was 0.52 meter. The light height is 7.4 meter above seawater.

The effect of lunar cycle, tidal condition and wind direction on the catches and profitability of Japanese common squid Todarodes pacificus jigging and trap-net fishing

Jigging with artificial lights (squid jigging) and deploying of large scale trap-net (also known as a set-net in Japan), are the major methods to capture Japanese common squid Todarodes pacificus in western Japan. Squid jigging is a highly selective fishing method. However, it consumes large amount of energy for steaming to the fishing ground and for lighting. In contrast, trap-net fishing requires substantially less energy but its capture efficiency is strongly influenced by its stationary mode of capture. The primary objective of this study was to analyze how various environmental and biological factors such as the lunar cycle, tidal condition, wind direction and squid abundance affect the capture efficiency of squid jigging and trap-net fishing. We analyzed the effect of these factors on squid catch in five Fisheries Cooperative Associations located on four islands in Nagasaki Prefecture, western Japan. Our analysis shows that squid catch in jigging and trap-net fishing is mainly influenced by the lunar cycle but also tide and wind direction play a marked role. In addition, squid abundance significantly affects the catches in trap-net fishing. Recommendations are made to improve the overall profitability of squid fishing by proper choice of the capture method, location and season.

Study of Marine Environment and Squid Fishing Fisheries in North Pacific Ocean Based on Remote Sensing and GIS Technology

Through the surface temperature (SST), sea chlorophyll and ocean current data got by satellite remote sensing inversion technology, and the statistic of fishing boat in the North Pacific from 2006 to 2011, this paper analyzes the relationship of marine environment and squid fishing fisheries fluctuate in North Pacific Ocean. It is determined that the sea surface temperature scope of high squid fisheries is 10~22°C, and the appropriate temperature is 18~20°C. The chlorophyll density of squid fish is approximately 0.02~0.40mg/m3.The frequency is the highest when the chlorophyll density is between 0.08~0.24 mg/m3. GAM module analysis indicates that neon flying squid the relation of the entertainment factor and north feeding migration every June to August and South action every October to November has different features. There is a positive correlation between SST and neon flying squid catch while north feeding migration. It is a negative correlation while going south. And there is a good correspondence between the distribution of chlorophyll and the distribution of the fish catch of core fishery. Fish catch doesn`t has great change as with longitude, but it correspond well with the latitude.

Probing of Potential Luminous Bacteria in Bay of Bengal and Its Enzyme Characterization

The present study dealt with the isolation, identification and enzyme characterization of potential luminous bacteria from water, sediment, squid, and cuttle fish samples of the Karaikal coast, Bay of Bengal, India during the study period September 2007 - August 2008. Bioluminescent strains were screened in SWC agar and identified using biochemical tests. As Shewanella henadai was found to be the most common and abundant species with maximum light emission [69,702,240 photons per second (pps)], the optimum ranges of various physicochemical parameters that enhance the luciferase activity in Shewanella hanedai were worked out. The maximum luciferase activity was observed at the temperature of 25°C (69,674,387 pps), pH of 8.0 (70,523,671 pps), salinity of 20 ppt (71,674,387 pps), incubation period of 16 h (69,895,714 pps), 4% peptone (70,895,152 pps) as nitrogen source, 0.9% glycerol (71,625,196 pps), and the ionic supplements of 0.3% CaCO3 (73,991,591 pps), 0.3% K2HPO4 (73,919,915 pps), and 0.2% MgSO4 (72,161,155 pps). Shewanella hanedai was cultured at optimum ranges for luciferase enzyme characterization. From the centrifuged supernatant, the proteins were precipitated with 60% ammonium sulfate, dialyzed, and purified using anionexchange chromatography, and then luciferase was eluted with 500 mM phosphate of pH 7.0. The purified luciferase enzyme was subjected to SDS-PAGE and the molecular mass was determined as 78 kDa.

Differential Assimilation Efficiency of Prey and Growth of Short-Tailed Shearwater Chicks

Abstract Procellariiform seabirds accumulate large amounts of lipid during the nestling period. Chick obesity functions as a buffer against irregular attentiveness by parents delivering meals. Surprisingly the assimilation mechanism necessary to attain obesity remains unclear. This study presents the first measurements of assimilation efficiency in relation to age and diet throughout the long nestling period of a Procellariidae. To determine the assimilation efficiency and diet effects on growth, Shorttailed Shearwater Puffinus tenuirostris chicks were fed in captivity on different diets of marine organisms (krill Euphausia superba, squid Nototodarus sloani and fish Hyperlophus vittatus) from age 10 to 85 days. Assimilation efficiency was highest (mean 93.7%) among young chicks (10–29 days old) then declined, becoming stable (mean 80.9%) among older (70–85 days old) pre-fledging chicks. It was noted that the krill-fed chicks showed consistently higher assimilation efficiencies, not only when young (mean 9...