被动底集网是地中海小规模渔业(SSF)中使用最广泛的渔具。Trammel网,特别是,具有关键优势,例如它们易于使用和处理以及对许多商业物种的高捕获效率。然而,它们需要高丢弃率(占总渔获量的5-44%)与高死亡率有关,从而对底栖群落产生不利影响,除了在最小保护参考尺寸(MCRS)下捕获商业物种的个体和受保护物种的标本。鱼罐被视为替代产品和更可持续的渔具类型,可以减少SSF中的丢弃物。在这项研究中,在亚得里亚海西北部的三个沿海站点(GFCMGSA17)测试了一个可折叠的锅,以将其捕捞效率与当地传统的trammel网进行比较。数据分析表明,商业物种的捕捞效率相似,无论是站点还是整体。此外,trammel网捕获了大量的丢弃物,就物种数量和CPUEW而言。渔获量比较研究涉及两个最丰富的登陆物种,常见的乌贼乌贼和环状的鱼翅。这些花盆对巴草更有效,而trammel网对较短长度的环状D.Nulularis更有效,大部分在MCRS(12厘米)下。创新的花盆可以为亚得里亚海传统上使用的trammel网提供有价值的替代品,至少在某些地区和时期。它们的主要优点包括它们不需要不同的索具,并且可以在没有诱饵的情况下使用,而他们的可折叠设计允许大量可以轻松装载在SSF船上。这项初步研究的结果表明,花盆可以实现减少SSF中的丢弃物和副渔获物的目标,而不会惩罚商业物种的捕捞。
Passive bottom-set nets are the most widely used fishing gears in Mediterranean small-scale fisheries (SSFs). Trammel nets, in particular, have key advantages such as their ease of use and handling and high capture efficiency for numerous commercial species. However, they entail high discard rates (5-44% of the total catch) connected to high mortality, thus exerting an adverse impact on benthic communities, besides catching individuals of commercial species under the minimum conservation reference size (MCRS) and specimens of protected species. Fish pots are seen as alternative and a more sustainable gear type that allow reducing discards in SSFs. In this
study, a collapsible pot was tested at three coastal sites in the north-western Adriatic Sea (GFCM GSA 17) to compare its catch efficiency with that of the local traditional trammel nets. Data analysis demonstrated a similar catch efficiency for the commercial species, both among sites and as a whole. Moreover, the trammel net caught a larger amount of discards, both in terms of species number and of CPUEW. The catch comparison
study involved the two most abundant landed species, common cuttlefish Sepia officinalis and annular sea bream Diplodus annularis. The pots were more effective for S. officinalis, whereas the trammel net was more effective for the shorter length classes for D. annularis, which were mostly under the MCRS (12 cm). The innovative pots could provide a valuable alternative to the trammel nets traditionally used in the Adriatic Sea, at least in certain areas and periods. Their main advantages include that they do not require a different rigging and they can be used without bait, while their foldable design allows large numbers to be easily loaded on board SSF vessels. The results of this pilot
study indicate that pots can achieve the objectives of reducing discards and bycatch in SSFs without penalizing the catch of commercial species.