scholarly journals CHARACTERISTICS OF TUNA, SMALL TUNA AND SKIPJACK (TTS) FISHERY IN KUTARAJA OCEAN FISHING PORT, ACEH

2021 ◽  
Vol 17 (2) ◽  
pp. 90-98
Author(s):  
Gussasta Levi Arnenda ◽  
Fathur Rochman
Keyword(s):  
Biological Data ◽  
Thunnus Albacares ◽  
Total Production ◽  
Sampling System ◽  
Katsuwonus Pelamis ◽  
Aceh Province ◽  
Fish Catch ◽  
Euthynnus Affinis ◽  
One Year ◽  
Immature Fish

Kutaraja Ocean Fishery Port is the oldest port in Banda Aceh City, Lampulo. Fishery resources are a new potential in the regional economic development of Aceh province. Fish resources that have great potential are from the large pelagic fish groups, including Tuna, Small Tuna and Skipjack (TTS) . Fishery characteristics are used to carry out sustainable fishing. This research was conducted at PPS Kuta Raja, Aceh for one year. Data collection was carried out directly through site surveys and interviews with related fisheries actors. Biological data and capturing aspects were carried out using a stratifield random sampling system by placing enumerators. The results showed that the production of TCT at PPS Kutaraja was dominated by 2 fishing gears, purse seine and hand lines. Based on the results of enumeration in 2020, the estimated total production of tuna skipjack and small tuna at PPS Kuta Raja reaches 11,520 tons. The highest total estimated fish catch is skipjack tuna (Katsuwonus pelamis) (SKJ) 5,802 tons, Bullet tuna (Auxis rochei)(BLT) 2814 tons, Yellow fin  (Thunnus albacares) (YFT) 2,452 tons, Krai Tongkol (Auxis thazard) (FRI) 448 tons, and Eastern little tuna (Euthynnus affinis) (KAW) 1,745 tonnes. All of the fish caught were dominated by immature fish. So it is very necessary to evaluate the use of fishing gear or the licensing of FADs. The monthly CPUE distribution pattern is the same, where in August it reaches the highest CPUE and in October it reaches the lowest CPUE value.

scholarly journals Identification of yellowfin tuna (Thunnus albacares), mackerel tuna (Euthynnus affinis), and skipjack tuna (Katsuwonus pelamis) using deep learning

2021 ◽  
Vol 944 (1) ◽  
pp. 012009
Author(s):  
I Ayuningtias ◽  
I Jaya ◽  
M Iqbal
Keyword(s):  
Deep Learning ◽  
High Accuracy ◽  
Yellowfin Tuna ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Learning Methods ◽  
Katsuwonus Pelamis ◽  
Economic Values ◽  
Euthynnus Affinis

Abstract Yellowfin tuna (Thunnus albacares), mackerel tuna (Euthynnus affinis), and skipjack tuna (Katsuwonus pelamis) have important economic values for the capture fisheries in Indonesia. Activities of identifying these fish and other types of tuna have been done manually, which can lead to errors and ultimately affect statistics, stock estimates, or traceability. The aim of this research is to use deep learning methods in identifying three species of tuna, specifically yellowfin tuna, mackerel tuna, and skipjack tuna. YOLO’s newest model, YOLOv5, was used to identify the fish. The number of epochs that produces the optimum accuracy value for use in the YOLOv5 model is 400. The values for training loss, accuracy, precision, recall and F1-Score when the model is learning with a total of 400 epochs are 0.000253, 95%, 98.1%, 93.9%, and 96%. Based on these results, the three species of tuna can be identified with high accuracy.

scholarly journals PENGGUNAAN PANCING ULUR (HAND LINE) UNTUK MENANGKAP IKAN PELAGIS BESAR DI PERAIRAN BACAN, HALMAHERA SELATAN

2016 ◽  
Vol 6 (1) ◽  
pp. 29
Author(s):  
Enjah Rahmat
Keyword(s):  
Purse Seine ◽  
Thunnus Albacares ◽  
Katsuwonus Pelamis ◽  
Euthynnus Affinis

Penangkapan ikan pelagis besar di perairan Pulau Bacan dilakukan dengan menggunakan alat tangkap huhate (pole and line), pancing ulur (hand line), tonda(troll line), dan pukat cincin (purse seine). Jenis-jenis ikan pelagis besar yang tertangkap terutama jenisjenis madidihang (Thunnus albacares), cakalang(Katsuwonus pelamis), dan tongkol (Euthynnus affinis).

scholarly journals Fishing season of large pelagic fish in Idi Rayeuk waters, East Aceh, Indonesia

DEPIK ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 167-173
Author(s):  
M.A. Chaliluddin ◽  
Rizka Alfita ◽  
Thaib Rizwan ◽  
Rahmat Rizqi ◽  
Rosi Rahayu ◽  
...  
Keyword(s):  
Time Series ◽  
Water Surface ◽  
Pelagic Fish ◽  
Yellowfin Tuna ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Fishing Season ◽  
Fish Samples ◽  
Euthynnus Affinis

Large pelagic fish live on the water surface in groups. Skipjack tuna (Katsuwonus pelamis), yellowfin tuna (Thunnus albacares), mackerel tuna (Euthynnus affinis), mackerel (Scomberomous guttatus) are species of fishes that mainly catches by fishermen using purse seines. This study aims to determine the length and weight of large pelagic fish in the water of Idi Rayeuk and best the fishing season. This research was conducted in one month. Fish samples were collected from fishermen that used purse seine and landed their catches at the Idi Rayeuk Fishing Port, East Aceh. Additionally, the data was derived from the fishing port time-series during 2015 to 2019. The result showed that the yellowfin tuna (Thunnus albacares) has a length between 37 - 58 cm with a weight of 1.0 - 3.2 kg, skipjack tuna (Katsuwonus pelamis) 32 - 58 cm in length and weight 0.5 - 3.0 kg, mackerel tuna has 33 - 54 cm of length with a weight of 0.6 - 2.5 kg, and mackerel has 44 - 66 cm of length and weighing 0.7 - 1.7 kg. Its also found that the peak season for catching yellowfin tuna (Thunnus albacares) and mackerel tuna is May and June, and the lowest season in December for the yellowfin tuna, and December and January for the mackerel tuna. The peak season for skipjack fishing occurs in May, August, and October, and the low season occurs in November and December. Meanwhile, the peak season for fishing mackerel occurs in May, September, and October, while the low season occurs in January, February, and March.Keywords:Fishing seasonLarge pelagicPurse seineIdi RayeukAceh

scholarly journals Length–weight analysis of ten species (Actinopterygii) supporting subsistence fishery in Lakshadweep waters, southern Arabian Sea

2021 ◽  
Vol 51 (3) ◽  
pp. 257-261
Author(s):  
Pentam Veli Pura Shahul Hameed ◽  
Aliyyathumada Ishyyapura Muhsin ◽  
Pathummathada Pookoya ◽  
Kutty Ranjeet
Keyword(s):  
Fish Species ◽  
Biological Information ◽  
Thunnus Albacares ◽  
Katsuwonus Pelamis ◽  
Positive Allometry ◽  
Reported Study ◽  
Weight Analysis ◽  
Total Fish ◽  
Commercially Important ◽  
Euthynnus Affinis

The length–weight relations of ten fish species representing eight genera and four families and that formed the backbone of the subsistence fishery in the Lakshadweep islands were estimated. These fishes which included four species of tuna [Katsuwonus pelamis (Linnaeus, 1758); Thunnus albacares (Bonnaterre, 1788); Auxis thazard (Lacepède, 1800); Euthynnus affinis (Cantor, 1849)], three species of needlefishes[Ablennes hians (Valenciennes, 1846); Tylosurus crocodilus (Péron et Leseur, 1821); Tylosurus acus melanotus (Bleeker, 1850)], two species of bait fishes [Spratelloides delicatulus (Bennett, 1832); Spratelloides gracilis (Temminck et Schlegel, 1846)], and one species of halfbeak (Hemiramphus archipelagicus Collette et Parin, 1978) contributed to 96% of the total fish landings. The samples were collected from fish landing centers of ten inhabited islands of Lakshadweep from 2015 to 2017. Katsuwonus pelamis showed isometric growth, S. delicatulus and S. gracilis exhibited positive allometry, while negative allometric growth was seen in other species. The coefficient a of the LWR ranged from 0.001 (A. hians) to 0.035 (T. albacares), while b ranged from 2.7 (T. acus melanotus) to 3.4 (S. delicatulus). The results of the presently reported study provide useful biological information on the stock of ten commercially important pelagic fish species supporting the traditional fisheries in Lakshadweep waters.

scholarly journals NVESTIGATION ON TUNA FISHERIES ASSOCIATED WITH FISH AGGREGATING DEVICES (FADs) IN INDONESIA FMA 572 AND 573

2020 ◽  
Vol 26 (2) ◽  
pp. 83
Author(s):  
Agustinus Anung Widodo ◽  
Wudianto Wudianto ◽  
Lilis Sadiyah ◽  
Mahiswara Mahiswara ◽  
Craig Proctor ◽  
...  
Keyword(s):  
Success Rate ◽  
Research Collaboration ◽  
Juvenile Fish ◽  
Biological Data ◽  
Thunnus Albacares ◽  
Katsuwonus Pelamis ◽  
The Government ◽  
Tuna Fisheries ◽  
Fish Aggregating Devices ◽  
Collaboration Project

The use of anchored fish aggregating devices (a-FADs) in the Indonesia-Indian Ocean has increased rapidly. Since 2004, the Government of Indonesia has issued various FAD related fisheries regulations; however, its implementation was difficult, largely due to the lack of such information. As an endeavor to improve the management of tuna fisheries associated with FADs in this area, an Indonesia–Australia research collaboration project conducted a port sampling program from November 2013 to December 2015 in three key fishing ports in the western Indonesia, i.e., Pelabuhanratu (West Jawa), Muara Padang (West Sumatera), and Bungus (West Sumatera). Data were collected through daily enumeration and interviews with skippers, which consisted of catch, trip duration, biological data, and number of FADs visited. These data were analyzed to estimate catch rate, success rate, and length frequency distribution. The success rate of hand line/trolling line (HL/TR) at Muara Padang showed much lower than that at Pelabuhanratu. This may be due to more a-FADs or higher density in the Padang region, competing with purse seine (PS) boats operating in the same area, than those in the Pelabuhanratu region. The species composition caught by HL/TR and PS associated a-FADs in Indonesian FMA 572 and 573 include skipjack (SKJ, Katsuwonus pelamis), yellowfin (YFT, Thunnus albacares) and bigeye tuna (BET, T. obesus). A large proportion of the SKJ, YFT and BET caught at both Indonesian FMA 572 and 573 were juvenile fish, below the reported length at maturity (Lm) for those species.

scholarly journals Length–weight analysis of ten species (Actinopterygii) supporting subsistence fishery in Lakshadweep waters, southern Arabian Sea

2021 ◽  
Vol 51 (3) ◽  
pp. 257-261
Author(s):  
Pentam Veli Pura Shahul Hameed ◽  
Aliyyathumada Ishyyapura Muhsin ◽  
Pathummathada Pookoya ◽  
Kutty Ranjeet
Keyword(s):  
Fish Species ◽  
Biological Information ◽  
Thunnus Albacares ◽  
Katsuwonus Pelamis ◽  
Positive Allometry ◽  
Reported Study ◽  
Weight Analysis ◽  
Total Fish ◽  
Commercially Important ◽  
Euthynnus Affinis

The length–weight relations of ten fish species representing eight genera and four families and that formed the backbone of the subsistence fishery in the Lakshadweep islands were estimated. These fishes which included four species of tuna [Katsuwonus pelamis (Linnaeus, 1758); Thunnus albacares (Bonnaterre, 1788); Auxis thazard (Lacepède, 1800); Euthynnus affinis (Cantor, 1849)], three species of needlefishes[Ablennes hians (Valenciennes, 1846); Tylosurus crocodilus (Péron et Leseur, 1821); Tylosurus acus melanotus (Bleeker, 1850)], two species of bait fishes [Spratelloides delicatulus (Bennett, 1832); Spratelloides gracilis (Temminck et Schlegel, 1846)], and one species of halfbeak (Hemiramphus archipelagicus Collette et Parin, 1978) contributed to 96% of the total fish landings. The samples were collected from fish landing centers of ten inhabited islands of Lakshadweep from 2015 to 2017. Katsuwonus pelamis showed isometric growth, S. delicatulus and S. gracilis exhibited positive allometry, while negative allometric growth was seen in other species. The coefficient a of the LWR ranged from 0.001 (A. hians) to 0.035 (T. albacares), while b ranged from 2.7 (T. acus melanotus) to 3.4 (S. delicatulus). The results of the presently reported study provide useful biological information on the stock of ten commercially important pelagic fish species supporting the traditional fisheries in Lakshadweep waters.

scholarly journals Authentication of commercially important tuna species landed in Tuticorin coast of Tamil Nadu, India by SE-AFLP method

2017 ◽  
Vol 64 ◽  
Author(s):  
G. Jeyasekaran ◽  
G. Arunkumar ◽  
P. Senthil Kumar ◽  
R. Jeya Shakila ◽  
D. Sukumar
Keyword(s):  
Tamil Nadu ◽  
Thunnus Albacares ◽  
Katsuwonus Pelamis ◽  
Closely Related Species ◽  
Important Species ◽  
Fish Meat ◽  
Thunnus Obesus ◽  
Commercially Important ◽  
Euthynnus Affinis ◽  
Species Specific

Seafood serves as a valuable protein source for human population. Among the seafood, tuna is considered as one of the commercially important species worldwide. Five tuna species namely Euthynnus affinis, Auxis thazard, Katsuwonus pelamis, Thunnus albacares and Thunnus obesus are commonly landed in the Tuticorin coast of Tamil Nadu. Among the five species, the exportable quality and grade of the meat is as follows: T. albacares> T. obesus> K. pelamis> E. affinis> A. thazard. In recent years, mislabeling is done by replacing high value tuna meat with low value tuna meat or with other low value fish meat to earn illegally. Usually, the species identification is done based on the morphological features, but this cannot be applied for the processed fish. PCR based identification methods have gained importance in the identification of fish species. PCR-AFLP is one of the molecular based methods, which can differentiate even closely related species. In this study, SE-AFLP method was employed to differentiate the above five tuna species viz., E. affinis, A. thazard, K. pelamis, T. albacares and T. obesus. Species specific AFLP marker was obtained in the primer combination of EcoR1 for fresh tuna. Band Sharing Index (BSI) analysis was also performed to find the similarities and variation among the five tuna species. AFLP profile of unknown tuna products was compared with the standard AFLP profile and the tuna species authentication was done by analysing BSI score.

Red muscle activation patterns in yellowfin (Thunnus albacares) and skipjack (Katsuwonus pelamis) tunas during steady swimming

1999 ◽  
Vol 202 (16) ◽  
pp. 2127-2138 ◽  
Author(s):  
T. Knower ◽  
R.E. Shadwick ◽  
S.L. Katz ◽  
J.B. Graham ◽  
C.S. Wardle
Keyword(s):  
Muscle Activation ◽  
Fork Length ◽  
Force Transducer ◽  
The Body ◽  
Thunnus Albacares ◽  
Katsuwonus Pelamis ◽  
Activation Patterns ◽  
Muscle Activation Patterns ◽  
Red Muscle ◽  
Swimming Mode

To learn about muscle function in two species of tuna (yellowfin Thunnus albacares and skipjack Katsuwonus pelamis), a series of electromyogram (EMG) electrodes was implanted down the length of the body in the internal red (aerobic) muscle. Additionally, a buckle force transducer was fitted around the deep caudal tendons on the same side of the peduncle as the electrodes. Recordings of muscle activity and caudal tendon forces were made while the fish swam over a range of steady, sustainable cruising speeds in a large water tunnel treadmill. In both species, the onset of red muscle activation proceeds sequentially in a rostro-caudal direction, while the offset (or deactivation) is nearly simultaneous at all sites, so that EMG burst duration decreases towards the tail. Muscle duty cycle at each location remains a constant proportion of the tailbeat period (T), independent of swimming speed, and peak force is registered in the tail tendons just as all ipsilateral muscle deactivates. Mean duty cycles in skipjack are longer than those in yellowfin. In yellowfin red muscle, there is complete segregation of contralateral activity, while in skipjack there is slight overlap. In both species, all internal red muscle on one side is active simultaneously for part of each cycle, lasting 0.18T in yellowfin and 0.11T in skipjack. (Across the distance encompassing the majority of the red muscle mass, 0.35-0.65L, where L is fork length, the duration is 0.25T in both species.) When red muscle activation patterns were compared across a variety of fish species, it became apparent that the EMG patterns grade in a progression that parallels the kinematic spectrum of swimming modes from anguilliform to thunniform. The tuna EMG pattern, underlying the thunniform swimming mode, culminates this progression, exhibiting an activation pattern at the extreme opposite end of the spectrum from the anguilliform mode.

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