Abstract：
It is commonly assumed that beach seining (BS) is more sustainable than bottom trawling because it involves non-motorized operations and limited fishing power. However, no scientific evidence supports this assumption. To address this gap, we evaluated the impact of beach seining, taking a small-scale shrimp fishery in northeast Brazil. Data collected monthly from December 2016 to November 2017 and in literature, were assessed (BS 31,001 individuals, 119 species, 37 families, and 19 orders; BT 6,031 individuals, 58 species, 20 families, and 14 orders). Beach seining demonstrated a lower proportion of bycatch (BS 1:2.3; BT 1:3.2), higher total shrimp catch (BS 87.2 t; BT 65 t), and greater species diversity than bottom trawling catches (BS 119; BT 58). Other aspects were closer associated with bottom trawling, such as the composition of dominant families (Sciaenidae and Pristigasteridae), the proportion of rare species (BS 30%; BT 24%) juveniles (BS 11g; BT 13g), the risk of species extinction, and the composition of ecological guilds. Despite their social significance, both fishing gears showed similar ecological indicators and adverse effects. The findings establish that the ecological concerns related to the impact of bottom trawling are also applicable to beach seine.
摘要：
通常认为海滩围网（BS）比底拖网更可持续，因为它涉及非机动操作和有限的捕捞能力。然而,没有科学证据支持这一假设。为了解决这个差距，我们评估了海滩围堵的影响，在巴西东北部小规模捕虾。2016年12月至2017年11月每月收集的数据，文献中，进行了评估(BS31,001人，119种,37个家庭,和19个订单；英国电信6031人，58种,20个家庭,和14个订单）。海滩围捕的副渔获物比例较低(BS1:2.3；BT1:3.2)，较高的虾总捕获量(BS87.2t；BT65t)，物种多样性高于底拖网渔获量(BS119；BT58)。其他方面与底拖网捕捞更紧密相关，例如显性科（Sciaenidae和Pristicasticeridae）的组成，稀有物种的比例（BS30％;BT24％）青少年（BS11g;BT13g），物种灭绝的风险,以及生态行会的组成。尽管具有社会意义,两种渔具表现出相似的生态指标和不利影响。调查结果确定，与底拖网捕捞影响有关的生态问题也适用于海滩围网。
