Salinity tolerance of Round Goby: Informing invasion potential in North American coastal watersheds

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(4), P. e0316327 - e0316327

Published: April 25, 2025

Since being introduced into the Laurentian Great Lakes in 1990s, round goby ( Neogobius melanostomus ) has spread rapidly, reaching Hudson River Estuary, NY 2021. To address expansion potential saline environments from this North American coastal invasion front, we experimentally assessed salinity tolerance of adult gobies. Water temperatures vary widely temperate aquatic ecosystems, and our study is first to investigate effect temperature on goby, conducting trials at three temperatures: a preferred 20°C, 26°C reflective summer conditions, 5°C winter conditions. Adult gobies were subjected weekly increases 3 parts per thousand (ppt), concluding 33ppt. Study specimens monitored for stress cues (behavior changes color changes), mortality. We found significant differences dependent water temperature, with highest lowest 26°C. By 30ppt, survival was 87% only 7% Based mortality results, may occur year-round brackish portions (<21ppt) Estuary as far south Harlem River. This would open access Long Island Sound, potentially rendering other watersheds be risk invasion. However, temperature-dependent findings suggest high habitats seasonally dependent, opportunities occurring colder months barriers warmer months. assess longer term body condition, another experiment maintained four sustained salinities (≤ 21ppt) ten weeks 20°C. Growth hepatosomatic index 21ppt significantly lower (p<0.001) than 1, 9, 15ppt, indicating exposure higher affect energy stores, limiting establishment potential.

Language: Английский

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Evaluating hook removal techniques on jaw-hooked Smallmouth Bass captured with soft plastic jigs

North American Journal of Fisheries Management, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

ABSTRACT Objective Products that are intended to facilitate the release of angled fish continue be developed by fishing industry without systematic and objective evaluation test their effectiveness for releasing causing undue harm. Here, we evaluated efficacy dehooking methods (i.e., removing hook with bare hands, pliers, or a mechanical device) while either holding in air lower mandible touching fish. Methods We captured 131 Smallmouth Bass Micropterus dolomieu using barbed Ned rigs (single-hook, soft plastic jig-style lures) assessed duration time needed remove hook, extent physical injury caused removal method, reflex impairment Results Unhooking was influenced method length. Physical also unhooking method; use pliers resulted no observed injuries compared all other methods, which some proportion being injured. Longer increased impairment. The traditional black bass yielded faster times fewer irrespective but hands proved fastest method. Conclusions Our research suggested an alternative touchless tool were not effective when shallow-hooked Bass. findings gripping constituted most approach context studied here.

Language: Английский

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Site-specific post-release predation of bonefish (Albula glossodonta) in a catch-and-release recreational fishery: informing voluntary actions and management strategies for a Blue Economy

Fisheries Research, Journal Year: 2025, Volume and Issue: 286, P. 107387 - 107387

Published: May 6, 2025

Language: Английский

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Optimizing the prediction of discard survival of bottom-trawled plaice based on vitality indicators

Conservation Physiology, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

Predicting the discard survival of aquatic animals after fisheries capture using vitality indicators (i.e. individual scores or indices physical condition) is a resource-efficient approach compared to estimating from captive observation. But such do not always lead accurate and robust predictions. Individual reflex impairments injuries are typically given same weight when being aggregated into an index, while some reflexes may contribute mortality more than others. This study established analytical methodology created index based on differential contributions optimize prediction bottom-trawled European plaice (

Language: Английский

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