We investigated the effect of trap-like gear deployment on the survival of European squid Loligo vulgaris and common cuttlefish Sepia officinalis eggs laid on various surfaces of these gears. In parallel, a detailed assessment of the two species’ egg deposition patterns on such gears was performed with respect to both the fishing season and their preferences for artificial spawning substrates. Hemp ropes with floats were the most preferred spawning substrate for squid, whereas cuttlefish mostly deposited their egg clusters on the plastic mesh of rectangular pots. Almost no egg laying was observed on traps where netting frame was coated with antifouling paints (copper oxide or zinc pyrithione). A high proportion of squid egg mops and cuttlefish egg clusters were shown to either be lost or to die after a period of continuous operation (i.e. hauling and retrieval at frequent intervals), which exceeded egg incubation periods. It is thus advised that coastal fishers either completely avoid operating static gears, which act as artificial spawning substrates on the spawning fields or use gears with materials that are repellent for these animals to approach and lay their eggs, such as nets coated with antifouling substances.

中文翻译：

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人工装置和类似陷阱的装置上的墨鱼和鱿鱼卵沉积模式：对后代生存和种群管理的影响

我们研究了类似陷阱的齿轮部署对欧洲鱿鱼 Loligo vulgaris 和普通墨鱼 Sepia officinalis 卵在这些齿轮不同表面上的生存的影响。同时，根据捕鱼季节及其对人工产卵基质的偏好，对这两个物种在此类渔具上的卵沉积模式进行了详细评估。带有浮子的麻绳是鱿鱼最喜欢的产卵基质，而墨鱼大多将卵簇放在矩形盆的塑料网上。在网框涂有防污漆（氧化铜或吡啶硫酮锌）的捕集器上几乎没有观察到产卵。高比例的鱿鱼蛋拖把和墨鱼蛋簇在连续运行一段时间后显示要么丢失要么死亡（即 频繁的拖运和取回），超过了鸡蛋的孵化期。因此，建议沿海渔民要么完全避免使用静态渔具，这些渔具在产卵场充当人工产卵基质，要么使用具有驱避这些动物接近和产卵的材料的渔具，例如涂有防污物质的网。