Entrance Shape of Fish Trap and Fishing Efficiency.

Sugimoto, Yuji; Fuwa, Shigeru; Ishizaki, Munechika; Imai, Takehiko

doi:10.2331/suisan.62.51

Cited by 4 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For funnel‐shaped entrances, a structure index has been defined to analyze the difficulty of trapping fish 14 . The ingress index of the commercial trap used in this study was approximately 2.0 (>1.0), suggesting that the entrance shape was not optimal for fish ingress and that catch efficiency could be improved by modifying the shape of the entrance.…”

Section: Discussionmentioning

confidence: 97%

See 1 more Smart Citation

Behavioral responses of arabesque greenling to trap entrance design

Yamamoto

Hiraishi

et al. 2006

Fisheries Sci

View full text Add to dashboard Cite

Fish catch efficiency can vary with the design of the trap entrance. To clarify how trap entrance design affects catch efficiency, the responses of fish to different trap entrance designs with different inclination angles or funnel lengths were observed. The passing ratio (i.e. catch) increased and then decreased with increasing inclination angle. An inclination angle of 34° had the highest passing ratio of 43%; the lowest passing ratio was 8% at an angle of 53°. A significant difference in passing ratio was found between two entrance designs (P = 0.006). There were significant differences in passing ratio for entrance designs with different funnel lengths (P = 0.01). The highest passing ratio was 38% for a funnel length of 29 cm. The approach and passing durations were also compared among the trap entrance designs. The results suggest that modifying the entrance shape can significantly improve the catch efficiency.

show abstract

Section: Discussionmentioning

confidence: 97%

“…Many studies [3][4][5][6][7][8][9][10][11][12][13][14][15] have reported that catch efficiency varies according to trap structure, and that the most important factor is the shape of the trap entrance. However, it is difficult to directly observe fish behavior near the trap entrance commercial actual fishing conditions.…”

Section: Introductionmentioning

confidence: 99%

Behavioral responses of arabesque greenling to trap entrance design

Yamamoto

Hiraishi

et al. 2006

Fisheries Sci

View full text Add to dashboard Cite

show abstract

“…Since the inlet direction is towards the bottom, rather than the front, at these landing angles, it would be hard for conger eels to find and enter the inlet when compared to pots at different angles. As a result, the inclination angle of the funnel in the pot has been reported as a factor that affects the catching performance of other target fish (Sugimoto et al, 1996;Li et al, 2006). Recently, tubular pots are commonly produced using recycled plastic materials, such as polyethylene (PE) or polypropylene (PP), and using mixture of multiple resins in various ratios.…”

Section: Discussionmentioning

confidence: 99%

Change in fishing performance of tubular pot for conger eels according to the angle of inclination to seabed

Kim

Jeong

et al. 2019

Indian J. Fish.

View full text Add to dashboard Cite

An experiment was conducted to investigate the fishing performance of tubular pots for conger eel in South Korea according to the inclination angle on the seabed. The experiment was conducted in a water tank by setting the angle of the tubular pot at 0°, 15°, 30°, 45° and 60° with respect to the bottom level. When the landing angle of the pot was relatively low, conger eels searched for the bait and focused on where the bait smell was being released. Subsequently, conger eels entered the pot. Thus, for catching conger eels, it is advantageous for the bait to be placed at the entrance side while installing the pot. The highest fishing performance in terms of catch per unit effort (CPUE) was at an inclination angle of 15°. There was a significant difference between the CPUEs and the landing angle (Kruskal-Wallis test, p = 0.009). The results of this study could be used to improve the efficiency of tubular pot operations for conger eels.

show abstract

“…Traps are widely used in fisheries throughout the world because of their simple structure and convenient operation. However, many factors affect the catch rate of traps, and the most important factor is the trap entrance 1–11 . The entrance number, shape, size and location significantly affect the catch.…”

Section: Introductionmentioning

confidence: 99%

“…However, many factors affect the catch rate of traps, and the most important factor is the trap entrance. [1][2][3][4][5][6][7][8][9][10][11] The entrance number, shape, size and location significantly affect the catch. For example, Munro et al .…”

Section: Introductionmentioning

confidence: 99%

Effects of entrance design on catch efficiency of arabesque greenling traps: a field experiment in Matsumae, Hokkaido

Yamamoto

Hiraishi

et al. 2006

Fisheries Sci

View full text Add to dashboard Cite

A field experiment was conducted in the Matsumae area of Hokkaido, Japan, during June and July 2002, to investigate the effects of different entrance designs on the catch efficiency of fish traps by fishing with commercial traps (entrance inclination angle [ α ] = 37 ° ; funnel length of entrance [ L f ] = 22 cm) and experimental traps. The experimental traps were of the same size and similar design as commercial traps, with different entrance inclination angles (trap E1: α = 46 ° ; E2: α = 27 ° ; E3: α = 0 ° ; all L f = 22 cm) or funnel lengths (E4: α = 37 ° , L f = 8 cm). In total, 2200 fish during 200 trap hauls were captured. The catch was significantly higher using both traps E2 and the commercial trap than with trap E3 ( P < 0.05), and the catch of trap E2 was higher than that of the commercial trap. There were no significant differences in mean fish body length or the frequency distributions of body length among trap types (E1, E2, E3 and commercial). The funnel length of the entrance also affected the catch of traps. Trap E4 had significantly higher catches than the commercial trap ( P = 0.04) when traps were deployed for a 1-day soak time. Fish body length frequency distributions did not differ between trap E4 and the commercial trap. The results showed that catch can be greatly affected by trap entrance designs.

show abstract

Entrance Shape of Fish Trap and Fishing Efficiency.

Cited by 4 publications

References 0 publications

Behavioral responses of arabesque greenling to trap entrance design

Behavioral responses of arabesque greenling to trap entrance design

Change in fishing performance of tubular pot for conger eels according to the angle of inclination to seabed

Effects of entrance design on catch efficiency of arabesque greenling traps: a field experiment in Matsumae, Hokkaido

Contact Info

Product

Resources

About