Texas’ Neighborhood Fishin’ Program provides close-to-home angling opportunities within nine large metropolitan areas to increase angling participation among urban constituents. Water bodies (0.4–2.4 ha) are typically stocked with harvestable (≈305 mm TL) Channel Catfish (CCF) Ictalurus punctatus to provide high-catch, successful fishing experiences. However, fish producers have been increasingly rearing and stocking lower-maintenance, faster-growing CCF × Blue Catfish I. furcatus hybrids to reduce costs. Although recent research in put–grow–take fisheries has suggested no differences in catchability, a number of Texas anglers utilizing these put-and-take fisheries have reported lower catch rates of hybrids. Thus, we evaluated relative catchability between the two fish types by stocking equal numbers of uniquely marked CCF and hybrids simultaneously into four Neighborhood Fishin’ Program water bodies on three occasions during 2018. Harvest of each type was measured during five systematic daily creel surveys across a 2-week period, with the first interviews occurring during the day of each stocking event. Nearly five times more CCF were harvested than hybrids during the first daily creel survey after each stocking event, but harvest of CCF declined significantly by the second daily creel survey. There were no significant differences in harvest between types among subsequent daily creels (surveys 2–5) over the 2-week creel periods. Few uniquely marked fish of either type were harvested in daily creel surveys 4 and 5. Despite the varying harvest rates, anglers remained satisfied or extremely satisfied throughout the 2-week creel periods. Our results indicate that CCF are more accessible to anglers than hybrids immediately after stocking. Managers’ choice of which type to stock should depend on relevant fishery objectives. Although CCF will likely produce higher initial catch rates, stocking a mixture of CCF and hybrids may provide a longer-term fishery that still produces catch rates high enough to maintain or enhance angler satisfaction.

中文翻译：

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城市渔业中垂钓者对沟鲶和蓝鲶×沟鲶杂交种的相对可捕性

德克萨斯州的“邻里垂钓”计划在九个大都市区内提供离家近的垂钓机会，以增加城市居民的垂钓参与度。水体（0.4-2.4 公顷）通常放养可收获的（≈305 毫米 TL）海峡鲶鱼 (CCF) Ictalurus punctatus，以提供高捕获、成功的捕鱼经验。然而，鱼类生产者越来越多地养殖和放养低维护、快速生长的 CCF × Blue Catfish I. furcatus混合动力以降低成本。尽管最近对放养渔业的研究表明捕捞能力没有差异，但许多利用这些放养渔业的德克萨斯垂钓者报告说杂交鱼的捕获率较低。因此，我们通过在 2018 年 3 次将相同数量的独特标记 CCF 和杂交鱼同时投放到四个邻里捕鱼计划水体来评估两种鱼类之间的相对可捕性。为期 2 周，第一次采访发生在每次放养活动当天。在每次放养活动后的第一次每日纱架调查期间，CCF 的收获量几乎是杂交种的 5 倍，但在第二次每日纱架调查中，CCF 的收获量显着下降。在 2 周的筒子架期间，随后的每日筒子架（调查 2-5）之间的类型之间的收获没有显着差异。在每日筒子架调查 4 和 5 中，几乎没有收获任何类型的独特标记的鱼。尽管收获率不同，垂钓者在整个 2 周的筒子架期间仍然感到满意或非常满意。我们的结果表明，在放养后立即比杂交鱼更容易获得 CCF。管理者选择哪种类型的种群应取决于相关的渔业目标。尽管 CCF 可能会产生更高的初始捕捞率，但放养 CCF 和杂交种的混合物可能会提供一个长期渔业，仍然产生足够高的捕捞率，以维持或提高垂钓者的满意度。