Handline Fishing Research Articles

A dual spatial analysis method based on recreation opportunity spectrum and analytical hierarchy process for outdoor recreation site suitability

Spatial planning tools are required to conduct outdoor recreational activities in harmony with the natural environment. This study introduces a dual spatial analysis method in which the Recreation Opportunity Spectrum (ROS) and Analytic Hierarchy Process (AHP) are run sequentially to evaluate different criteria groups. This study was conducted in the coastal region of the Enez district of Edirne, one of Turkey's northwestern provinces. With ROS, remoteness, and evidence of humans criteria were considered unweighted, and four land classes, urban, rural, natural with road, and primitive-semiprimitive, and activities suitable for these land classes were determined in the GIS environment. These are six terrestrial activities including nature walk, cycling, horse riding, picnic, camping, and wildlife observation, and four water-based activities including canoeing, swimming, diving, and handline fishing. With the AHP, nine natural criteria were analyzed as weighted and four suitability levels were determined for each activity in the GIS environment, as not suitable, marginally suitable, moderately suitable, and highly suitable. Sensitivity analysis by changing the priorities of the criteria showed that the analysis using the AHP results was reliable especially for determining highly suitable areas, and could be helpful for outdoor recreation planning. Finally, the suitability maps matched the ROS land classes, and the verified final maps were created. This study provides reliable results, showing that planners and decision-makers can adapt to similar areas with different administrative or geographical boundaries. Simultaneously, it contains a series of information that will contribute to planning components such as exploring, developing, diversifying, and presenting outdoor recreation opportunities and restricting them when necessary.

Characteristics of coral reef fisheries in the Wakatobi islands

Wakatobi National Park has a diverse fish population, and its conservation potential for reef fish resources is quite large. As a result, to be sustainable, the exploitation of these resources must be properly managed. This study aims to look into the characteristics of reef fish fisheries, such as species composition, catch, fishing ground, and fish length. The outcomes are hoped to be beneficial in monitoring the management of the resources. This research was conducted in April-November 2018 in Wakatobi, Indonesia. Analytical methods process the data. The results showed that gold spotted rabbitfish (Siganus punctatus), parrotfish (Hipposcarus longiceps), emperor (Lethrinus lentjan), grouper (Epinephelus sp), and trevallies (Caranx sp) dominated the total catch from muroami, speargun, and hand line. Muroami boats have a higher average CPUE (212 kg/trip/month) than speargun (29.0 kg/trip/month) and handlines (13.0 kg/trip/ship). Some of the reef fish caught in Wakatobi National Park is small and immature. Muroami net, speargun, and handline fishing are mostly done in the southern part of the Wakatobi National Park area, around Binongko Island. One of the management actions undertaken by Wakatobi fishermen is fishing inside the management zone that has been established, namely the local use zone.

Some Aspects of the Reproductive of Japanese Threadfin Bream (Nemipterus japonicus Bloch, 1791) Caught in the Area Around the Artificial Reef In the Pitu Sunggu Waters of the Makassar Strait

Japanese Threadfin Bream is a demersal fish commonly found around artificial reefs. Food availability in the artificial reef ecosystem is essential for the sustainability of this species. Hence, this research aimed to determine several aspects of bio-reproduction of Japanese Threadfin Bream caught in the artificial reef (bioreeftek). Samples were taken using handline fishing, twice a month (April-July 2020) in Pitu Sunggu Waters, Makassar Strait. The samples were observed for its reproduction aspects. The result showed that the Japanese Threadfin Bream fish caught have a balanced sex ratio between males and females, 1:1.03. The analysis of the gonad maturity stage obtained was II-IV, and the gonado somatic index ranged from 0.541-0.940 for males and 1.156-2.358 for females. The first mature Japanese Threadfin Bream size was 18.29 cm for males and 16.99 cm for females. The Japanese Threadfin Bream fish fecundity ranged between 35.042-42.061 eggs.

Catching trial around portable Fish Aggregating Devices (FADs) at Belitung Waters

Belitung Regency is an administrative area in the Bangka Belitung Islands Province. Handline is one of the most popular fishing gear in Belitung Island. However, the production value of handline fishing gear has decreased recently. This decrease was caused by the lack of fishing technology in handline fishing which potentially threatened the sustainability of small-scale fishing industry in the region. The use of portable Fish Aggregating Devices (FADs) technology was expected to increase the productivity of handline fishing gear. This study aims to compare the composition of handline catch, productivity, and fishers total income using portable FADs and without FADs. Sixteen experimental fishing trips were conducted to collect data. The results showed that the dominant catch of handline using portable FADs was threadfin breams (Nemipterus hexodon) (50.7%), greater lizardfish (Saurida tumbil) (27.4%), yellow stripe threadfin bream (Pentapodus aureofasciatus) (10.7%), grouper (Epinephelus bleeker) (4.6%), monocle bream (Scolopsis sp.) (4.2%), yellow jack (Caranx bartholomei) (2.1%), and mackerel (Acanthocybium solandri) (0.2%). The number of catches using portable FADs was 521 of fish (37%), while the one without FADs was 888 of fish (63%). However, based on its weight, the operation using portable FADs resulted in 84.4 kg (58%) and those without FADs was 61.6 kg (41%). The productivity of handline fishing with portable FADs was higher, 1.32 kg / trip, compared to its counterpart which was 0.91 kg / trip. Based on the Kruskal-Wallis test, it showed that the use of portable FADs has a significant effect on handline fishing. Additionally, the total income of fishermen with portable FADs was higher than those without portable FADs.

KARAKTERISTIK ORGAN SEKSUAL SEKUNDER IKAN TUDE BATU (SELAR BOOPS) DARI PERAIRAN BITUNG

Selar boops is a group of small pelagic fish in the Carangidae family, this fish is known by the Bitung people as Tude Batu. This fish has economic value which is caught by fishermen in the waters around Bitung City using hand line fishing. This study aims to identify the secondary sexual organs. Fish samples were collected from 2 locations, namely Kampung Pisang and Pasar Winenet. The secondary sexual organs are identified by observing the morphological using the morphometric truss method of 19 morphological characters. Anova K-Means Cluster (AKMC) analysis as well as discriminant analysis were used to differentiate male and female fish groups. The results of this research showed that the morphometric characteristics of secondary sexual organs in male and female S. boops. The results showed that there were 11 different morphometric truss for morphometric characters in secondary sexual organs of male and female S. boops using AMKC analysis. The results of the discriminant analysis showed that the characteristics of the secondary sex organs in S. boops fish were found in the ratio of pectoral fin length (PaSiPek) and head length (PaKe) with a discriminant value (D) <0 grouped as male fish and discriminant value (D)> 0 classified as female. Keywords : discriminant, morphometry, secondary sexual organs, tude batu

A study of brown-marbled grouper (Epinephelus fuscoguttatus) population dynamics in Takabonerate National Park Waters, South Sulawesi, Indonesia

Abstract. Fatma, Mallawa A, Najamuddin, Zainuddin M, Fachrie R. 2021. A study of brown-marbled grouper (Epinephelus fuscoguttatus) population dynamics in Takabonerate National Park Waters, South Sulawesi, Indonesia. Biodiversitas 22: 4298-4307. Understanding aspects of the population dynamics of groupers such as the brown-marbled grouper can provide valuable insights into how to manage grouper stocks effectively. Conducted from February 2020 to February 2021 in Takabonerate National Park waters, Selayar Islands District, South Sulawesi, Indonesia, this study sought to elucidate the size structure and cohorts, population growth rate, total mortality rate, fishing mortality rate, natural mortality rate, exploitation rate and yield per recruit (Y/R) of the brown-marbled grouper. Grouper samples were caught using several fishing gears (i.e., hand line fishing, spearfishing, and trapping) with a total catch of 1042 specimens. The sampled specimens exhibited significant size structure and were classified into five age-specific cohorts. The growth rate coefficient was 0.46/year, with the brown-marbled grouper population tending to exhibit slow growth (K < 0.5/year). The estimated asymptotic length was 109.0 cm. The fishing mortality was higher than the natural mortality, with an exploitation rate of 0.65, indicating that brown-marbled groupers in the waters of Takabonerate National Park have been subjected to extensive and intensive fishing, as also indicated by an estimated Y/R lower than the optimum Y/R rate.

Catching performance and catching efficiency of siliconized baits in hand line fishery

The present study investigated the catching performance and catching efficiency of natural mud shrimp (alive) (Upogebia pusilla), siliconized mud shrimp and siliconized pellet in handline fishing. The trials were performed in Kıyıkışlacık Village of Muğla province. The main body of the handline is Ø 0.50 mm, leader and snood are Ø 0.27-0.30 mm, the snood length and distance are 10 cm and 20 cm, respectively. Each handline has 3 hooks and the hook type is 4 no straight. Catches from natural mud shrimp, siliconized shrimp and siliconized pellet bait retained separately, sorted by species and weighed as. 0.01 g sensitivity and measured as the total length. Totally 590 individuals from 30 different species in total were caught including; 28 bony fish (93.33%), and 2 cephalopods (0.66%). While natural mud shrimp captured the 50.7% of fish, 44.7% and 4.6% were caught with siliconized mud shrimp and siliconized pellet, respectively. CPUE values of natural mud shrimp, siliconized shrimp and silicon pellet were calculated as 1.57 n/h, 1.38 n/h and 0.14 n/h, respectively. In addition, YPUE values were determined as 121.84 g/h, 137.73 g/h and 7.62 g/h for natural mud shrimp, siliconized shrimp and silicon pellet, respectively. Despite the fact that the number of individuals that a live mud shrimp catch in a unit of time is high, it was found out that the weight is more in a unit of time when silicone mud shrimp is used. It was concluded that using of siliconized mud shrimp has a high capacity of catching performance and catching efficiency and can be used as bait when natural mud shrimp cannot be utilized as alive or unable to be supplied, due to the weather conditions and time restrictions.

Feasibility Analysis of Handline Fishing Equipment Case Study on Barrang Caddi Island, Sangkarrang District, Makassar City

The fisheries sector is a sector that has a contribution to economic development in Indonesia, this can be seen from the increase in fishery production which continues to increase from year to year. One area that has a high level of enthusiasm in fishery economic activity is Barrang Ca'di Island with the traditional system of hand line fishing on Barrang Caddi Island resulting in the inability to access fishing locations due to one of the cruising capabilities of the fleet and production costs that must be incurred by hand line fishermen, the fisherman also still maintains the pattern of economic system patterns in fishing activities as a reference material in living their daily lives, based on this the purpose of this study is to determine the level of income for production activities and the level of business feasibility of hand line fishermen for fishing. developed on Barrang Ca'di Island. The results of the study obtained the amount of income from the fishing line business, which was Rp. 88,358,140, - and showed that the line fishing business carried out by fishermen on Barrang Caddi Island was feasible to be developed with the division between revenue and costs having a value of more than one (>1 ).

Economic benefits of fisheries activities in Jatibarang Reservoir, Central Java

Inland fisheries are categorized as small scale fisheries. Those small-scale fisheries are frequently under-valued social and economically. Likewise with Jatibarang Reservoir that is included in it. Whereas the intensity of the use of the reservoir by the local community is very high. Although according to local wisdom, the use of Jatibarang Reservoir is only limited to handline fishing, it is thought to have a good impact on the economy of the community and the reservoir environment. The study was carried out during the period of 2018, with the aims to determine the economic impact of the fisheries sector even though there are restrictions on the types of fishing gear used in the Jatibarang Reservoir. By using the Contingent Valuation Method in estimating the value of consumer surplus through the use of several parameters such as annual income, expenditure and number of fishing days. The results show that the handline fishing activities in the Jatibarang Reservoir are still achieved the economic benefits or in other words, the net benefit value shows a surplus.

Hook selectivity and catch efficiency in two sport fishing sectors in the Strait of Istanbul, Turkey: Classic handline fishing and Light Rock Fishing (LRF)

In this study, the efficiency of two fishing methods (a) traditional handline commonly used in the Strait of Istanbul and (b) light rock fishing (LRF), which is beginning to spread in recent years, were investigated by monthly sampling between September 2014 and September 2015. One classic handline fishing tackle and one LRF fishing tackle were used in the test fishing exercise. In addition, the effects of the hook sizes (numbers 6, 8 and 10) used in the handline fishery on the size selectivity for horse mackerels were also studied. Catches using both types of fishing gear were mainly composed of Trachurus mediterraneus (89.60%), Scorpeana porcus (5.12%), Sardina pilchardus (1.98%), Atherina boyeri (0.99%), Liza aurata (0.66%), Scorpaena scrofa (0.50%), Pomatomus saltatrix (0.33%), Sprattus sprattus (0.33%) and a few other species. The frequency distributions of horse mackerel caught using handlines and LRF were slightly different and ranged between 6.1–19.0 cm and 9.0–16.0 cm, respectively. Of all the handlines, LRF yielded the highest catch per unit effort (CPUE), 1.295 kg/10 hooks/hour. The log normal model selectivity curve gave the best fit for the T. mediterraneus by using the SELECT method. The modal lengths of horse mackerel caught by handline hook sizes no.10 and no. 8 hook were calculated as 13.4 cm and 17.7 cm, respectively. In addition, the spread values were determined with 3.58 and 4.74, respectively.

Traditional Handline Fishing in Pohuwato Regency, Indonesia

This study aims to determine the level of income of traditional handline fishing and its marketing efficiency in the Bumbulan Village, Paguat District, Pohuwato Regency, Gorontalo Province. This study used a survey method with questionnaires by interviews. The samples were selected by census of 33 fishermen. This study was conducted in December 2018 to October 2019. The results revealed the traditional handline fishermen average income is Rp. 4,073,030 per month. It is categorized as high income according to BPS (Central Bureau of Statistics).

Shifting baseline syndrome highlighted by anecdotal accounts from snapper (Ocyurus chrysurus) fishery

The fishes of the Lutjanidae family are widely distributed throughout the Atlantic, Indian and Pacific Oceans and have relevant commercial importance. Yellowtail snapper ( Ocyurus chrysurus ) is a targeted species in the small-scale fishery of the northeastern coast of Brazil, notably for hand-line fishing. We used the local ecological knowledge (LEK) of three generations of fishers from Ilheus (southern Bahia State, Brazil) to evaluate the perception of weight, best day of capture and relative abundance of the species. More experienced fishers captured the largest specimens, had larger catches and were more likely to indicate a decrease in species abundance. On the other hand, younger fishers had smaller catches and were more likely to indicate that the species abundance is stable or increasing. The results suggest the occurrence of shifting baseline syndrome among fishers and emphasize the importance of including information from fishers in the construction of management measures. Fishers can play a key role in developing viable proposals that are aimed at the management of fishing of species with spawning aggregation, such as yellowtail snapper.

Vulnerability of Baitfishes of Handline and Lift Net Fishing Gear that Landed in Kendari, Bitung, Wakatobi and Larantuka Fishing Port

The high intensity of catching has an impact on decreasing stock, vulnerability, which has the potential affect to stock sustainability; such vulnerabilities include the baitfishs group in tuna fisheries. Vulnerability studies of baitfishs in Bitung, Wakatobi, Kendari and Larantuka in July 2013 were carried out to find out the pressure caused. The data collected is the parameter of productivity and perception of fish. The catches besides tuna are skipjack tuna (Katsuwonus pelamis), Indian Scad (Decapterus russelli), little tuna (Euthynuss affinis), Squid (Loligo loligo.), Anchovies (Stelophorus commersonii) and Sardinella (Sardinella fimbriata). Based on MSC (Marine Steward Council) Vulnerability Criteria, vulnerability index in Bitung (skipjack = 85.6; scad = 98.9; little tuna = 96.2), Wakatobi (scad = 97.9; squid = 98.5) and Kendari (skipjack= 85.6; anchovies = 98.5) and Sardinella fimbriata is about 96 in Larantuka. The conclusion of this research are the baitfishes state as low vulnerability and low risk and potential for sustainability

The Efficiency Handline Fishing Gear in Gorontalo Regency, Indonesia

The aim of this study was to know the technical efficiency handline fishing gear and allocative efficiency (price) handline fishing gear as well as economic efficiency handline fishing gear in the village Kayubulan Batudaa District of Gorontalo Province.,This study uses quantitative descriptive analysis of the data by using DEA (Data Envelopment Analysis) to measure the technical efficiency and CBA (Cost Benefit Analysis) to measure allocative efficiency (price) and the analysis of economic efficiency is the result of technical efficiency and allocative efficiency (price). Analyzing technical efficiency using software DEAP version 2.1. The results showed that the technical efficiency (ET) note that the value of the average value of technical efficiency obtained at0788or <1, meaning that the fishing effort handline fishing is still technically efficient. On average allocative efficiency/price (EH) obtained by3,881or> 1, so the fishing effort by handline fishing gear has been efficient in the allocative. The average economic efficiency obtained for3091 or> 1, so the average fishing effort by handline fishing gear is already economically inefficient.

Tiger sharks can connect equatorial habitats and fisheries across the Atlantic Ocean basin.

Increasing our knowledge about the spatial ecology of apex predators and their interactions with diverse habitats and fisheries is necessary for understanding the trophic mechanisms that underlie several aspects of marine ecosystem dynamics and for guiding informed management policies. A preliminary assessment of tiger shark (Galeocerdo cuvier) population structure off the oceanic insular system of Fernando de Noronha (FEN) and the large-scale movements performed by this species in the equatorial Atlantic Ocean was conducted using longline and handline fishing gear and satellite telemetry. A total of 25 sharks measuring 175–372 cm in total length (TL) were sampled. Most sharks were likely immature females ranging between 200 and 260 cm TL, with few individuals < 200 cm TL being caught. This contrasts greatly with the tiger shark size-distribution previously reported for coastal waters off the Brazilian mainland, where most individuals measured < 200 cm TL. Also, the movements of 8 individuals measuring 202–310 cm TL were assessed with satellite transmitters for a combined total of 757 days (mean = 94.6 days∙shark-1; SD = 65.6). These sharks exhibited a considerable variability in their horizontal movements, with three sharks showing a mostly resident behavior around FEN during the extent of the respective tracks, two sharks traveling west to the South American continent, and two sharks moving mostly along the middle of the oceanic basin, one of which ending up in the northern hemisphere. Moreover, one shark traveled east to the African continent, where it was eventually caught by fishers from Ivory Coast in less than 474 days at liberty. The present results suggest that young tiger sharks measuring < 200 cm TL make little use of insular oceanic habitats from the western South Atlantic Ocean, which agrees with a previously-hypothesized ontogenetic habitat shift from coastal to oceanic habitats experienced by juveniles of this species in this region. In addition, this study adds evidence that tiger sharks are able to connect marine trophic webs from the neritic provinces of the eastern and western margins of the Atlantic Ocean across the equatorial basin and that they may experience mortality induced by remote fisheries. All this information is extremely relevant for understanding the energetic balance of marine ecosystems as much as the exposure of this species to fishing pressure in this yet poorly-known region.

Study on different hook and bait types in the Persian Gulf hand line fishery: optimization and development

The hand line fishery in the Persian Gulf is considered a sustainable fishing practice. The aims of this study were to estimate catch composition, catch rates, length frequencies, and the percentage of individuals caught below length-at-maturity with two types of hooks, circle and J-style with natural and artificial bait by hand line fishing. Circle and J-style hooks with natural and artificial bait were alternated. Sampling operations were carried out on Qeshm Island, in the North of the Persian Gulf in spring 2015. Catch per unit effort for J-hooks with natural and artificial bait and circle hooks with natural and artificial bait differed significantly (p , and Alectis indicus differed significantly between treatments (p > 0.05). For most species (except L. nebulosus ), there was no significant difference between circle and J-style hooks for the proportion of individuals smaller than length-at-maturity (p > 0.05).

Economic Analysis of the Hook and Line Fishery in Kombuthurai Coast, Tamil Nadu

The present investigation is about the economic analysis of the hook and line fishery along the coast of Kombuthurai, Thoothukudi district of Tamil Nadu. Inferences from the study indicated that that hook number 5, 6 and 7 were found ideal for commercial exploitation of Carangids, Grouper, Barracuda and Needlefish in angling by wielding fresh condition live bait. Using the artificial lure number 3.5, 4.0 and 4.5 applied in trolling line, the most dominant catch was seer fish (80%) and least in sailfish (8%). Significantly the study reports that the highest gross revenue ₹42060/trip was made in trolling line than that of the handline of ₹26400/trip ascribed by targeted of high market value species. The trolling line crew share per person was twice over than the handline fishing (₹3821/trip). Instead of unorthodox eye estimation of fish weight, a novel approach of weight based fish sale (for low to high market value species) was observed in Kombuthurai fishing village and this practiced also espoused by a neighbor fishing village.

EFISIENSI USAHA PENANGKAPAN IKAN DENGAN KAPAL MOTOR DI PELABUHAN PERIKANAN PANTAI SADENG KABUPATEN GUNUNGKIDUL

This research aims to determine (a) the factors that affect the productivity of the fish effort, (b) the level of technical price/allocative, economic eficency and revenue of fishing effort in fishing port Sadeng, Gunungkidul. The research was conducted using a survey. Determination of the study area is purposively. Respondent is selected by simple random sampling. Respondent is the owner of the motor vessel boat using gillnet and handline fishing gear, as many as 32 people.Data analysis is amultiple linear regression, calculating the level of efficiency and revenue. The results showed that factor significantly affect the productivity of fishing effort is the amount of fuel, fishing gear mesh size and number of crew (ABK). Value of technical efficiency of fishing effort (ET) is 0,99 while price efficiency (EH) is 5,117 and value of economic efficiency (EE) is 5,065. Revenues of fishing effort is Rp 5.854.072/trip and the value of R/C is 1,47/trip means fishing in Sadeng is profitable and feasible to be developed.

Multiple management strategies to control selectivity on parrotfishes harvesting

Small-scale fisheries are exploiting large numbers of parrotfishes from Brazilian reefs, leading to significant changes in the community structure. Specifically, three now vulnerable species, Scarus trispinosus (Valenciennes, 1840), Sparisoma frondosum (Agassiz, 1831) and Sparisoma axillare (Steindachner, 1878), have been intensively targeted on the Brazilian northeast, although little is known about such fisheries. The vulnerable status of these species has brought about the need to officially regulate their fisheries. Here, the effects of different gear types on the fishing of these three species are analyzed regarding catch composition, size and species selectivity. Landings of gillnet, speargun, and handline fishing were sampled during one year, when information of each fishery operation and size frequencies of fishes caught were recorded. Gillnets are the least selective gear, catching a greater proportion of immature individuals of S. trispinosus. Handline showed the lowest values of capture per unit effort (CPUE) and only caught S. axillare and S. frondosum above the size at first maturity; it did not catch S. trispnosus. Speargun is the only gear that caught a higher proportion of mature individuals of S. trispinosus, which by no means should exempt it from further regulations, as it is important to assure that neither immature nor exceptionally large individuals are removed from the population. Comprehensive parrotfish fishing regulation is urgently needed if the species harvest is to be allowed. Slot size delimitation and gear control are some of the suggested measures to avoid overfishing and changes in life history traits of targeted species.

Selective commercial line fishing and biodiversity conservation co-exist on seamounts in a deepwater marine reserve

Enhanced socio-economic and conservation outcomes for both an existing fishery and a new deep-water marine reserve off eastern Australia were achieved by research that identified additional options for conservation managers. Commercial power hand-line fishing was permitted to continue on productive seamount fishing grounds within the reserve because new information enabled boundaries and zoning proposed in the reserve’s draft Management Plan to be revised and consistent fisheries regulations to be formulated. The draft plan would have removed access to fishing grounds that provide approximately 25% of the annual regional Australian total allowable catch of the premium fishery species, Blue-eye Trevalla (Hyperoglyphe antarctica). Day-time power handline fishing in 280–550m depths on Taupo and Barcoo Seamounts avoided Harrisson’s Dogfish (Centrophorus harrissoni) – the primary species of conservation concern – because the shark is a diel vertical migrator, residing deeper than Blue-eye during the day before ascending to shallower depths at night to feed on micronekton. Harrisson’s Dogfish occurs on several other seamounts where it was previously unrecorded. These results, together with expectation of low mortality of any incidental dogfish bycatch and low impacts on benthic habitats, supported changes to management arrangements which preserve the seamount Blue-eye fishery worth approximately A$1M annually whilst protecting more seamounts and greater areas of benthic habitat in the restricted 200–700m depth range. Research uptake was facilitated by clarifying policy options at a critical stage in the planning process. This required having clearly articulated management objectives that aligned conservation and fishery imperatives, involving knowledgeable fishers in making robust field observations to address specific knowledge gaps and management needs, and identifying the requirements for ongoing fishery monitoring that addresses remaining management uncertainties. This potential to identify win-win outcomes in the Australian marine planning process provides some general signposts for future policy decisions as marine reserve networks are implemented and reviewed, and for scientists wanting to effectively engage in decision-making processes.