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Seasonality, distribution, and harvest trends of Crevalle Jack in Texas
Marine and Coastal Fisheries ( IF 1.7 ) Pub Date : 2024-02-21 , DOI: 10.1002/mcf2.10284
Ethan Getz 1 , Lily Walker 1 , Catherine Eckert 1 , Charles Downey 1
Affiliation  

ObjectiveCrevalle Jack Caranx hippos are important coastal predators and support an increasingly popular catch‐and‐release sport fishery. However, population declines have recently been perceived by stakeholders in parts of the species' range. Here, we aimed to provide distribution and harvest trends for Crevalle Jack in the northwestern Gulf of Mexico.MethodsLong‐term fishery‐independent and fishery‐dependent data were collected by the Texas Parks and Wildlife Department from 1983 to 2021. Bag seine, bay trawl, and gill‐net samples were collected in conjunction with angler creel surveys. Crevalle Jack that were observed in fishery‐independent sampling were used to assess patterns in both juvenile and adult relative abundance, distribution, and seasonality. In addition, boosted regression tree models were used to highlight important predictors of Crevalle Jack presence. Crevalle Jack harvest observed during angler surveys was used to describe the fishery, including differences in inshore and offshore catch patterns. Relative abundance of both juveniles and adults was variable across years but displayed no trend throughout the time series.ResultCrevalle Jack of all sizes were found within inshore waters, with subadults and large adults particularly reliant on estuarine systems. Recruitment peaked in early summer, with juveniles occupying all major estuaries along the coast. Shifts in recruitment were evident in bag seines, as the mean date of catch trended almost 2 weeks earlier over the study period. The Crevalle Jack fishery was spread across inshore and offshore waters, with significantly larger fish harvested offshore during summer. The majority of anglers who harvested Crevalle Jack stated that they were specifically targeting other species, thus supporting the notion that the targeted fishery is mainly catch and release.ConclusionAs Crevalle Jack declines have been noted elsewhere in the species' range, these results could help to inform future management decisions in Texas.

中文翻译:

德克萨斯州 Crevalle Jack 的季节性、分布和收获趋势

目标克雷瓦勒·杰克卡兰克斯河马是重要的沿海掠食者,支持日益流行的捕捞和释放游钓。然而,利益相关者最近发现部分物种范围内的种群数量下降。在这里,我们的目的是提供墨西哥湾西北部的 Crevalle Jack 的分布和收获趋势。方法德克萨斯州公园和野生动物部门从 1983 年至 2021 年收集了长期独立于渔业和依赖于渔业的数据。袋围网、海湾拖网,并结合钓鱼者鱼架调查收集刺网样本。在与渔业无关的抽样中观察到的 Crevalle Jack 用于评估幼鱼和成鱼的相对丰度、分布和季节性模式。此外,使用增强回归树模型来突出显示 Crevalle Jack 存在的重要预测因素。在钓鱼者调查期间观察到的 Crevalle Jack 渔获量用于描述渔业,包括近海和近海捕捞模式的差异。幼鱼和成鱼的相对丰度随年份变化,但在整个时间序列中没有表现出趋势。结果在近海水域中发现了各种尺寸的Crevalle Jack,其中亚成鱼和大型成鱼特别依赖河口系统。初夏时,幼鱼的招募达到顶峰,幼鱼占据了沿海所有主要河口。袋围网的招募变化很明显,因为在研究期间,平均捕获日期几乎提前了两周。Crevalle Jack 渔业遍布近海和近海水域,夏季在近海收获的鱼体形明显更大。大多数捕获 Crevalle Jack 的垂钓者表示,他们专门针对其他物种,因此支持了目标渔业主要是捕获和释放的观点。 结论 由于 Crevalle Jack 的数量在该物种范围内的其他地方有所下降,这些结果可能有助于为德克萨斯州未来的管理决策提供信息。
更新日期:2024-02-21
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