Efficiency of capture of tench, Tinca tinca L. by trammel nets of monofilament and multifilament net twine combinations

Abstract

Efficiencies of different trammel net types on capture of tench, Tinca tinca L. were investigated in Lake Beyşehir in Turkey between April 1998 and August 1999. Nets with an inner wall of monofilament and outer walls of multifilament (type A) were more efficient than the other net types (type B, monofilament inner and outer walls; type C, multifilament inner wall and monofilament outer walls; and D, multifilament inner and outer walls). Type A nets were 2.08, 1.79 and 1.08 times more effective than the types D, C and B for catching tench. Monofilament inner walls of trammel nets were on average 1.85 times more effective than multifilament inner walls. No significant difference in catching efficiency of monofilament and multifilament outer walls was found (P>0.05). The average size of tench caught in monofilament trammel nets was higher than those caught in multifilament trammel nets, although not significantly different.

Assessment of catch composition and economic analysis of monofilament and multifilament under-meshed gears (Ngongongo) at Likoma Island, Lake Malawi

“…The recorded catch per unit effort (CPUE) agrees with what was earlier reported by Simasiku et al [30] that CPUE for monofilament gillnets was 2.7 higher than multifilament Gillnets. The results obtained in the present study also support previous findings [23,33,55], that monofilament gillnet catch more fish than multifilament gillnet. Hamley [17] suggested that nets of thinner twine are less visible, easier to stretch, and more flexible; therefore, they should tangle more fish.…”

“…The higher catch efficiency of monofilament gillnets compared to multifilament is in agreement with earlier reports. This comparison of monofilament and multifilament gillnets confirmed findings of other investigators that monofilament nets generally outfished those made of multifilament twine [23,39,40]. It is believed that monofilament nets are less visible under certain conditions of water clarity and fish are less likely to detect them and turn away [28,30,54].…”

“…Catch per unit effort (CPUE): Balik & Cubuk [23] found that a thin monofilament twine caught significantly larger fish than a thicker twine of the same mesh size, and postulated that this was due to the greater elasticity of the thinner twine. For instance, they found that monofilament trammel nets caught 2.08 times more tench, (Tincatinca) than multifilament nets in Lake Beysehir.…”

Population structure, growth, mortality and estimated stock size of the introduced tench,Tinca tinca(L.), population in Lake Beyşehir, Turkey

“…(2007). Prior to this study, only a few investigations dealt with tench fishing in Lake Beyşehir (Balık and Çubuk, 2000), or with body composition (Zencir, 2003).…”

Mono- vs multifilament gillnets: effects on selectivity of narrow-barred Spanish mackerel Scomberomorus commerson in the Persian Gulf

“…There are concerns about possible increases in catching efficiency, considering several studies on other species have demonstrated relatively greater (up to ∼1.5-2.7×) catch-per-unit-of-effort (CPUE) among gillnets made from monofilament (e.g. Washington, 1973;Balik & Çubuk, 2000Balik & Çubuk, , 2004Thomas et al, 2003;Simasiku et al, 2017;Richard Winston et al, 2019). Such concerns are not only directed towards S. commerson but also several other retained (e.g.…”