Seasonality, distribution, and harvest trends of Crevalle Jack in Texas

IF 1.8 3区农林科学 Q2 FISHERIES Marine and Coastal Fisheries Pub Date : 2024-02-20 DOI:10.1002/mcf2.10284

Ethan Getz, Lily Walker, Catherine Eckert, Charles Downey

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Abstract

Objective

Crevalle 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.

Methods

Long-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.

Result

Crevalle 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.

Conclusion

As Crevalle Jack declines have been noted elsewhere in the species' range, these results could help to inform future management decisions in Texas.

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得克萨斯州克里瓦勒杰克鱼的季节性、分布和收获趋势

目标克里瓦里鯵（Crevalle Jack Caranx hippos）是重要的沿海掠食者，支持着日益流行的捕捞-放生运动渔业。然而，最近在该物种分布的部分地区，利益相关者发现其种群数量有所下降。在此，我们旨在提供墨西哥湾西北部克氏原鯵的分布和捕捞趋势。方法得克萨斯州公园与野生生物部收集了 1983 年至 2021 年期间与渔业无关和与渔业有关的长期数据。袋式围网、海湾拖网和刺网样本与垂钓者渔获量调查一起收集。在独立于渔业的取样中观察到的杰克鱼（Crevalle Jack）被用于评估幼鱼和成鱼的相对丰度、分布和季节性模式。此外，还使用增强回归树模型来突出预测鳕鱼出现的重要因素。垂钓者调查期间观察到的鳕鱼收获量被用来描述渔业情况，包括近岸和离岸捕捞模式的差异。幼鱼和成鱼的相对丰度在不同年份各不相同，但在整个时间序列中没有趋势。在近岸水域发现了各种体型的 Result Crevalle Jack，亚成体和大型成体尤其依赖河口系统。繁殖高峰期在初夏，幼鱼占据了沿岸的所有主要河口。袋式围网的繁殖变化很明显，因为在研究期间，平均捕获日期有提前近两周的趋势。鳕鱼捕捞分布在近岸和近海水域，夏季在近海捕捞的鳕鱼体型明显更大。大多数捕获鳕鱼的垂钓者表示，他们的目标是其他鱼种，因此支持目标鱼类主要是捕获和释放的观点。结论由于克氏原鯵在该物种分布区的其它地方出现了减少，这些结果有助于为得克萨斯州未来的管理决策提供信息。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine and Coastal Fisheries FISHERIES-MARINE & FRESHWATER BIOLOGY

CiteScore

3.40

自引率

5.90%

发文量

审稿时长

>12 weeks

期刊介绍： Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science publishes original and innovative research that synthesizes information on biological organization across spatial and temporal scales to promote ecologically sound fisheries science and management. This open-access, online journal published by the American Fisheries Society provides an international venue for studies of marine, coastal, and estuarine fisheries, with emphasis on species'' performance and responses to perturbations in their environment, and promotes the development of ecosystem-based fisheries science and management.