Lure Fishing Research Articles

流体－構造連成解析によるバイブレーションルアーの水中運動再現および構造最適設計

Lure fishing is a well-known type of fishing that uses artificial lures instead of traditional live baits. Vibratory lure is a kind of lures performs greater vibration behavior than other kinds of lures. In common, more excellent vibration behavior of vibrating lure can attract carnivorous fish more efficiently. Up to now, lure design is generally based on the intuition of the designer, and there is little academic research on vibrating lure. In this study, we build the finite element model of a commercial vibration lure using a 3D scanner at first. Then, fluid–structure interaction (FSI) analysis is carried out to reproduce underwater motion of the vibration lure, where we can calculate the frequency of the flow induced vibration (FIV). Finally, in order to obtain the best FIV behavior of the vibration lure, based on the simulation results of FSI analysis, we perform structural design optimization of the vibration lure using the Box-Behnken design method, which belongs to the response surface methodology. In the structural design optimization, we set three design variables, which are the positions (x and z) of the weight placed in the lower part of the lure, and the eye position (i.e., the knot position between fishing line and lure) along the lure body. According to optimal results, the highest frequency of the FIV can reach 6.95Hz. However, the present work is still in the early stage of the academic research on lure design, we aim to develop more optimization method for lure design that make lure fishing more interesting for both beginners and anglers.

On Domestication and Foreignization in the Translation of Lure Fishing Gear

China is the largest fishing gear market around the globe at present, and the fishing gear export and production are both the first in the world. Under the influence of COVID-19 and increasing publicity by we-media, fishing has been favored by more and more people. Although lure fishing is a relatively novel fishing sport in China, but its market potential is huge. Different from the traditional fishing methods, lure fishing has not been introduced into China for long, so the translation of the names of these fishing gears is of vital importance. From the perspectives of domesticating and foreignizing translation strategies, this paper analyzes the characteristics of the original names and translated names of some lure fishing gears, and further realizes the similarities and differences between Chinese and English languages.

Optimal time of year and fishing methods for controlling exotic fishes in Longluan Lake, Taiwan

Aim: This study aimed to identify the optimal time and fishing methods for removing exotic fishes, including striped snakehead (Channa striata), marble goby (Oxyeleotris marmorata), tilapia (Oreochromis spp.), three-spot gourami (Trichopodus trichopterus), and predatory carp (Chanodichthys erythropterus), from Longluan Lake, which is located in Kenting National Park in Taiwan. Methodology: The selected fishing methods included lure fishing, longline fishing, and fyke netting. A total of 2,284 individuals were collected over 12 removal events in Longluan Lake from 2017 to 2019. Among the collected fish, 1,640 fish represented exotic species, and 644 fish represented native species. Results: Among the collected fish, 1,640 fish represented exotic species, and 644 fish represented native species. Based on the results of this study, we suggest that the optimal time for managing exotic fishes is from April to June, when is the period representing lower water levels in Longluan Lake. For removing specific exotic fish in Longluan Lake, employing lure fishing in natural habitat is effective for C. striata and Oreochromis spp., utilizing fyke netting in natural habitat is workable for T. trichopterus and C. erythropterus, and operating fyke netting in artificial habitat is useful for O. marmorata. Interpretation: The habitat preferences and sampling efficiency of gears vary among exotic fishes, however, a combination of applying lure fishing and fyke netting in both habitat types will achieve the greatest advantage for controlling exotic fishes in the Longluan Lake.

Structural design optimization of vibration lures based on CAE

Lure fishing, a sports-like game using artificial lures as baits, has been popular around the world. In the present work, to enhance the underwater vibration behavior of vibration lures, we carry out structural design optimization of vibration lures based on computer aided engineering (CAE). At first, we create the finite element model of a vibration lure by a 3D scanner and perform weak coupled fluid-structure interaction (FSI) analysis of the vibration lure using finite element method. Then, according to the simulation results, we optimize the eye position (i.e., the knot position between fishing line and lure) and the positions of the weight placed in the lower part of the lure to obtain its largest fluid induced frequency.

Structural Design Optimization of Hard Lure for Maximum Fluid Induced Frequency

Lure fishing is a popular fishing type that using fishing lures instead of live baits. Vibration lure, a kind of hard lures, performs vibration behavior for catching fish. Hence, vibration lure has capable of appealing carnivorous fishes more efficiently when it owns higher fluid induced frequency. Currently, lure of design is mostly carried out based on the designers’ intuition and experience, whereas academic study of vibration lure is seldom considered. In this study, we perform the fluid structure interaction (FSI) analysis to reproduce the underwater motion of a commercial vibrating lure, where the finite element model of the vibration lure was obtained by a 3D scanner. Then, to enhance the fluid induced vibration behavior of the vibration lure, we carried out structural optimization using the Box-Behnken design, which is a type of design of experiment. From the results obtained from the structural design optimization method, the optimal fluid induced frequency could reach its maximum value of 6.95 Hz based on the FSI analysis.

Citizen science data suggest that a novel rig improves landing rate and reduces injury and handling time in recreational angling with artificial lures in Baltic pike (Esox lucius).

The optimal terminal gear in hook-and-line recreational fishing maximizes landing rates and minimizes injury to the fish because some fish will be released after capture. We designed a novel rig configuration in artificial lure fishing for top predators and examined its effectiveness in angling for Baltic northern pike (Esox lucius) using a citizen science approach based on observational data collected from volunteer anglers in the field. The novel rig included two changes to traditional rig designs common to artificial lure angling. First, hooks were mounted in a way giving better hook exposure and eliminating lever-arm effects from the lure to the hooks once a fish is hooked. This construction allowed the second change, being a shift to hooks 4–5 sizes smaller than those used on traditional hook mounts. We analysed observational data collected by volunteer anglers using either the novel rig or a standard rig mount in two types of artificial lures (softbait and hardbait) of the same size (about 17 cm). Using N = 768 pike contacts as input data, we showed the landing rates of pike targeted with artificial lures significantly and substantially increased from 45% with normal-rigs to 85% when the same lure types were fished with the novel rig configuration. Lure type and water temperature had no effects on landing rates. Moreover, hardbaits on normal-rigs produced significantly more injury, bleeding and elevated unhooking time compared to fish captured on hardbaits with release-rigs. We conclude that simple changes to traditional hook sizes and mounts in lure fishing may benefit both anglers and the fishes that are to be released and that citizen science projects with volunteer anglers are able to provide good data in proof-of-concept studies. Further experimental studies are needed to differentiate hook size from hook mount effects because both variables were confounded in the results of the observational data presented here.

Recreational fishing impacts on threatened river sharks: A potential conservation issue

SummaryThe Adelaide River in Australia's Northern Territory is a popular recreational fishing area, as well as habitat for threatened and protected river sharks (Glyphis species). Both the Critically Endangered Speartooth Shark (Glyphis glyphis) and Endangered Northern River Shark (Glyphis garricki) are identified here in illegal catches from recreational angling. The identification of a decayed shark specimen using a DNA barcoding‐like approach is the first such application to the identification of protected sharks in a recreational fishery. While the extent of catches by recreational anglers is unknown, the threatened status of these sharks, their suspected low population sizes, restricted distributions and importance of the Adelaide River as a nursery area call for the consideration of this as a potential conservation issue. As such, appropriate measures should be taken to reduce interactions with recreational anglers. The primary target species in the river is the iconic sportfish, Barramundi, which is predominantly caught by unbaited lure. Sharks are rarely caught on lure, allowing an opportunity for mitigation to focus on a fishing activity (baited hooks) which would limit any regulatory impact on popular lure fishing. Potential mitigation measures range from increased angler education and compliance checks, to the implementation of a spatial closure to baited hook fishing (a lure‐only zone). Such measures may assist in meeting a stated objective of the Australian Government's river shark Recovery Plan to ‘reduce and, where possible, eliminate adverse impacts of recreational fishing'.

フライラインの力学（フライの影響）

Lure fishing and fly-fishing have been positioned as sports deliberately different from the traditional Japanese fishing-style. In the case of fly-fishing, casting is the element which anglers must master in order to cast a fly, done so by using the weight of a line. This study uses experimental and computational analysis to investigate the dynamic behavior of a fly line. Fly-fishing is constituted by various elements, but the importance that casting holds is extremely large. Fling speed, the casting process and the loop shape of the line while in flight are important that casting holds is extremely large. Fling speed, the casting process and the loop shape of the line while in flight are important for the proper presentation of flies. Moreover, the shape of a fly line is also important for a long cast or controlled cast. Fly is a lure that imitates an aquatic insect or a small fish, and becomes the prey of the target fish. And, there are countless of fly patterns. Therefore, anglers necessary to select an appropriate rod or line according to the size of the fly. In this paper, a rod, a line and arms are modeled by using rigid bodies and links. The time history behavior of the model is calculated by pseudo angler velocity of the arms. The validity of the model in detail is investigated. And, proper rod and line in accordance with the fly of the size is verified.

フライラインの力学

Lure fishing and fly-fishing have been positioned as sports deliberately different from the traditional Japanese fishing-style. In the case of fly-fishing, casting is the element which anglers must master in order to cast a fly, done so by using the weight of a line. This study uses experimental and computational analysis to investigate the dynamic behavior of a fly line. Fly-fishing is constituted by various elements, but the importance that casting holds is extremely large. Fling speed, the casting process and the loop shape of the line while in flight are important for the proper presentation of flies. Moreover, the shape of a fly line is also important for a long cast or controlled cast. Therefore, the most suitable casting method will be clarified from the viewpoint of sports engineering and human dynamics. There are some types of casting techniques, overhead cast, side cast, false cast (forward cast and back cast), double haul cast and roll cast. In the case that there is an obstacle something like a tree, anglers can not do back cast while the false cast. In such situation, anglers have to select “Roll cast”. Roll cast consists of only forward cast. The arms motion of roll cast is different from the motion of forward cast. Therefore, the initial condition at the time anglers start the roll cast is important for the appropriate casting. In this paper, a rod, a line and arms are modeled by using rigid bodies and links. The time history behavior of the model is calculated by pseudo angler velocity of the arms. The difference of the arms motion between forward cast and roll cast is evaluated. And the line behavior with respect to the initial condition that anglers start casting is clarified.

Dynamics of a Fly Line

Lure fishing and fly-fishing have been positioned as sports deliberately different from the traditional Japanese fishing-style. In the case of fly-fishing, casting is the element which anglers must master in order to cast a fly, done so by using the weight of a line. This study uses experimental and computational analysis to investigate the dynamic behavior of a fly line. Fly-fishing is constituted by various elements, but the importance that casting holds is extremely large. Fling speed, the casting process and the loop shape of the line while in flight are important for the proper presentation of flies. Moreover, the shape of a fly line is also important for a long cast or controlled cast. Therefore, the most suitable casting method will be clarified from the viewpoint of sports engineering and human dynamics. Anglers usually do “False cast” in the actual fishing field in order to put a fly for long distance and in order to control the line orbit. This technique increases the line speed and the kinematical energy. “False cast” consists of forward cast and back cast. Anglers wait until the line becomes straight forward after the cast, then they start the next cast. Anglers usually change the line orbit while they do “False cast”. Therefore, the line flies appropriate distance. In this paper, a rod, a line and arms are modeled by using rigid bodies and links. The time history behavior of the model is calculated by pseudo angler velocity of the arms. The difference of the line behavior with respect to the time interval between forward cast and back cast is evaluated. It is clarified that there is an appropriate interval.

Dynamics of Lure Casting

Fly-fishing and lure fishing have been positioned as sports deliberately different from the traditional Japanese fishing-style. In the case of lure fishing, casting is the element which anglers must master in order to cast a lure at an appropriate position. Lure fishing constitutes various elements, for example, casting, reeling, hooking and landing, but the importance that casting holds is extremely large. This study uses experimental and computational analysis to investigate the dynamic behavior of lure casting. The casting process and the timing of the line leaves are important for the proper presentation of lure. Moreover, the shape of a rod before the lure released is important for a long cast or controlled cast. However, it is difficult to grasp the phenomenon or to make a numerical model. Therefore, the most suitable casting method will be clarified from the viewpoint of sports engineering and human dynamics. In this paper, the system of rod and lure is modeled, and the behavior of the rod and the flying distance of a lure are calculated in the case that line tension is considered. The difference of the behavior and flying distance with line tension is investigated. And suitable timing that angler releases the line is clarified. Moreover, hang length of lure is investigated and proper length is obtained.

Dynamics of Lure Casting (Influence of Lure Weight)

Fly-fishing and lure fishing have been positioned as sports deliberately different from the traditional Japanese fishing-style. In the case of lure fishing, casting is the element which anglers must master in order to cast a lure at an appropriate position. Lure fishing constitutes various elements, for example, casting, reeling, hooking and landing, but the importance that casting holds is extremely large. This study uses experimental and computational analyses to investigate the dynamic behavior of lure casting. The casting process and the timing of the lure released are important for the proper presentation of lure. Moreover, the shape of a rod before the lure released is important for a long cast or controlled cast. However, it is difficult to grasp the phenomenon or to make a numerical model. Therefore, the most suitable casting method will be clarified from the viewpoint of sports engineering and human dynamics. In this paper, the system of rod and lure is modeled, and the behavior of the rod and the flying distance of a lure are calculated. Especially, influence of lure weight is clarified.

Dynamics of a Fly Line (Double Haul Cast)

Lure fishing and fly-fishing have been positioned as sports deliberately different from the traditional Japanese fishing-style. In the case of fly-fishing, casting is the element which anglers must master in order to cast a fly, done so by using the weight of a line. This study uses experimental and computational analysis to investigate the dynamic behavior of a fly line. Fly-fishing constitutes various elements, but the importance that casting holds is extremely large. Fling speed, the casting process and the loop shape of the line while in flight are important for the proper presentation of flies. Moreover, the shape of a fly line is also important for a long cast or controlled cast. However, it is difficult to grasp the phenomenon or to make a numerical model because a fly line is an object of flexible string. Therefore, the most suitable casting method will be clarified from the viewpoint of sports engineering and human dynamics. In addition, measuring an angler performing movements with a flexible object such as a rod or a line is difficult. So establishing a method to measure the dynamic behavior precisely is also one of the purposes of this study. Anglers usually do “double haul cast” in the actual fishing field in order to put a fly for long distance and in order to control the line orbit. “Haul” means pulling the line compulsory. This technique increases the line speed and kinematical energy. Therefore, the line flies long distance. In this paper, the effect of “Haul” is investigated.

Dynamics of a Fly Line (Effect of the Rebound)

Lure fishing and fly-fishing have been positioned as sports deliberately different from the traditional Japanese fishing-style. In the case of fly-fishing, casting is the element which anglers must master in order to cast a fly, done so by using the weight of a line. This study uses experimental and computational analysis to investigate the dynamic behavior of a fly line. Fly-fishing constitutes various elements, but the importance that casting holds is extremely large. Fling speed, the casting process and the loop shape of the line while in flight are important for the proper presentation of flies. Moreover, the shape of a fly line is also important for a long cast or controlled cast. However, it is difficult to grasp the phenomenon or to make a numerical model because a fly line is an object of flexible string. Therefore, the most suitable casting method will be clarified from the viewpoint of sports engineering and human dynamics. In addition, measuring an angler performing movements with a flexible object such as a rod or a line is difficult. So establishing a method to measure the dynamic behavior precisely is also one of the purposes of this study. The rebound phenomenon occurs in the casting process. In this paper, the effect of rebound is investigated analytically.

Dynamics of a Fly Line (Analysis Considering Arm Motion)

Lure fishing and fly-fishing have been positioned as sports deliberately different from the traditional Japanese fishing-style. In the case of fly-fishing, casting is the element which anglers must master in order to cast a fly, done so by using the weight of a line. This study uses experimental and computational analysis to investigate the dynamic behavior of a fly line. Fly-fishing constitutes various elements, but the importance that casting holds is extremely large. Fling speed, the casting process and the loop shape of the line while in flight are important for the proper presentation of flies. Moreover, the shape of a fly line is also important for a long cast or controlled cast. However, it is difficult to grasp the phenomenon or to make a numerical model because a fly line is an object of flexible string. Therefore, the most suitable casting method will be clarified from the viewpoint of sports engineering and human dynamics. In addition, measuring an angler performing movements with a flexible object such as a rod or a line is difficult. So establishing a method to measure the dynamic behavior precisely is also one of the purposes of this study. For the past study, motion of wrist and upper arm had been fixed to make a simple numerical model. However, upper arm, forearm and wrist move in the actual fishing field. In this paper, three input numerical model considering arm motion is established.

Color vision, accommodation and visual acuity in the largemouth bass

The largemouth bass is a sight feeder and one of the most popular freshwater fish for lure fishing. While lures a have variety of colors and forms, there is no information on the color vision and form perception in the largemouth bass. We recorded S-potentials from the isolate retinae of the largemouth bass to examine color vision electrophysiologically. The occurrence of the C-response provided direct evidence for the possession of color vision. L-responses recorded indicated a high spectral sensitivity to red. The direction and distance of lens movement of a specimen of 43 cm in fork length indicated a horizontal visual axis and the near point at 13.5 cm, respectively. The visual acuity calculated from the cone density and the focal distance of the lens was 0.10. Histological characteristics of the retina indicated that the eyes are well adapted to both form and movement perceptions.

Wildlife-Related Recreation, Meaning, and Environmental Concern

It has been suggested that participating in outdoor recreation exposes people to environmental degradation and increases their concern about such degradation on a broader scale. However, research has not supported a strong connection between outdoor recreation participation and environmental concern. Focusing on wildlife-related recreation, we hypothesized that the meaning of an activity to an individual would mediate the relationship between participation and environmental concern. A mail-back survey of hunting and fishing license holders in Washington ( n = 602) was used. Using structural modeling, we compared a model of a direct relationship between wildlife-related recreation participation and environmental concern with two models where the meaning of wildlife-related recreation fully and partially mediated the participation/environmental concern relationship. Full mediation was supported for bow hunting, fly-fishing, and wildlife and nature viewing, and partial mediation was supported for artificial lure and bait fishing. No mediation occurred for firearm hunting. Given the questionable fit of most models tested, the actual relationship between recreation participation and environmental concern may be more complex than previous research has suggested. Continued research on the role of activity meaning in influencing the participation/concern relationship, while also exploring the role of other personal and social factors, should be conducted.

Striking Behavior of the Largemouth Bass and Use of the Binomial Distribution for its Analysis

Abstract Three hundred tagged largemouth bass (Micropterus salmoides) 14 to 29.5 cm long were divided into experimental groups of 100 fish which were designated as control, bait fishing, and artificial lure fishing. Since individuals were “known” by tag numbers, it was possible to test the hypotheses of (1) unequal vulnerability to angling among individuals and (2) hook avoidance learning. Results revealed that some conditioning or learning occurred among naive bass exposed to live bait angling for the first time. In the case of artificial lures and/or bass which were no longer naive, individuals appeared to have equal probability of capture and seemingly struck at random.

カツオ一本釣機構に関する研究-II

In a previous paper1), we reported that the angling curve obtained in the angling for skipjack can be classified into three types. In the other paper2), we reported that the process of angling is composed of two periods, namely, the time taken for the fish to be hooked and the time required to pull the fish up. In this paper, the relation between the time required to pull the fish up and the technical skill of the angler is discussed. It is important that the fisherman angles for the fish, as much as possible in the restricted period, because the period the fishing boat keeps in contact with the shoal may be short. Therefore, it is advisable that the time required to pull the fish up is as short as possible. There are three methods in the angling for skipjack, namely, live bait fishing and two types of the lure fishing. In one of the types of lure fishing, called “Bakezuri” or “Kakaezuri”, the fisherman holds a fish under his left arm, when he detaches the fish from the lure. In the other type called “Tatakizuri”, the fisherman detaches the fish from the lure without holding. Mean values of the time required to pull the fish up by means of live bait fishing, “Kakaezuri” and “Tatakizuri” were 16.1 sec., 5.99 sec., and 1.96 sec. respectively. The live bait fishing is composed of six operations, while the lure fishing is composed of five operations. An operation to bait a fishhook is not contained in the latter. Therefore, the time required to bait a fishhook was about 10 seconds. Although “Tatakizuri” has the shortest time required to fish, this method is employed for only a little while, because it requires great skill and heavy labor. There were some differences in the time required to fish among the crews of three fishing boats (Table 2). The time required to fish is affected with differences in the fishing tackles, too. The dimensions of the various types of the fishing tackles for skipjack and albacore were shown in Table 3 and Fig. 2. It can be considered that the time required to fish is a reflex of the technical skill of the fisherman.