Sea temperature effects on depth use and habitat selection in a marine fish community

Freitas, Carla; Villegas‐Ríos, David; Moland, Even; Olsen, Esben Moland

doi:10.1111/1365-2656.13497

Cited by 46 publications

(37 citation statements)

References 61 publications

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“…Temperature is a key environmental factor affecting fish activities [28]. It can directly and indirectly affect fish life activities, such as spawning [29], embryonic development [30,31], survival rate [32], feeding metabolism [33], migration [34], and habitat distribution [35]. Yellowfin tuna is a warm-water fish species that needs a certain water temperature to inhabit and spawn.…”

Section: Discussionmentioning

confidence: 99%

Impact of Abnormal Climatic Events on the CPUE of Yellowfin Tuna Fishing in the Central and Western Pacific

Zhou

Fan

et al. 2022

Sustainability

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To explore the impact of climate change on fishery resources, the temporal and spatial characteristics of the thermocline in the main yellowfin tuna purse-seine fishing grounds in the western and central Pacific Ocean during La Niña and El Niño years were studied using the 2008–2017 Argo grid data (BOA_Argo) and the log data of commercial fishing vessels. A generalized additive model (GAM) was used to analyze the variables affecting yellowfin tuna fishing grounds. The results showed that in La Niña years, the catch per unit effort (CPUE) moved westward as the high-value zone of the upper boundary contracted westward to 145° E, and in the El Niño years this moved eastward to 165° E. Compared with normal years, the upper boundary depth difference of the thermocline on the east and west sides of the equatorial Pacific was larger in La Niña years, and the upper boundary depth of 80–130 m shifted westward. The thermocline strength was generally weaker in the west and stronger in the east. The thermocline had two band-like distribution structures with an axis at 15° N and 15° S. The CPUE was distributed from 120 m to 200 m. The CPUE distribution was dense when the temperature range of the upper boundary of the thermocline was 27.5–29.5 °C, and the intensity was 0.08–0.13 °C·m−1. The upper-boundary temperature had the greatest impact on the CPUE. The eastward shift of the CPUE during El Niño and the westward shift during La Niña were associated with the optimal thermocline parameter values. The factor of year had a fluctuating effect on the CPUE, and the influence of the La Niña years was greater. The areas with high abundance were 5° N–5° S and 150° E–175° E. The results showed that the changes in the thermocline caused by abnormal climate events significantly affected the CPUE.

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Section: Discussionmentioning

confidence: 99%

Impact of Abnormal Climatic Events on the CPUE of Yellowfin Tuna Fishing in the Central and Western Pacific

Zhou

Fan

et al. 2022

Sustainability

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“…Fishes captured using hook-and-line can experience behavior selection against more active individuals (Alós et al, 2016), and MPA networks can help oppose this selection. Utilizing the same acoustic telemetry array in Tvedestrand fjord, Freitas et al (2021) showed that summer peaks in sea surface temperature represent challenges for cod residing in a fjord environment, while ballan wrasse (Labrus bergylta) and Atlantic pollack (Pollachius pollachius) retained their movement behavior. During such periods, cod were confined to deeper, cooler water masses-away from shallow habitats preferred during autumn and winter.…”

Section: Discussionmentioning

confidence: 99%

“…Surrounded by MPAs allowing hook-and-line-type fishing gear, the no-take zone enables studying effects of protection on fish (Figure 1 and Table 1). An acoustic telemetry array consisting of 56 acoustic receivers is deployed in the fjord, also including the no-take zone (for details, see Villegas-Ríos et al, 2017b;Thorbjørnsen et al, 2019;Freitas et al, 2021).…”

Section: Study Systemmentioning

confidence: 99%

Restoration of Abundance and Dynamics of Coastal Fish and Lobster Within Northern Marine Protected Areas Across Two Decades

et al. 2021

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This article reviews a suite of studies conducted in a network of coastal Marine Protected Areas (MPAs) in Skagerrak, Southeast Norway. In 2006, Norway’s first lobster reserves were implemented, with the aim of protecting European lobster (Homarus gammarus) through a ban on fixed gear. A before–after control-impact paired series (BACIPS) monitoring program was initiated to evaluate effects of protection on depleted lobster populations. Experimental trapping and capture-recapture techniques were combined to track demography of populations, also including movement of individuals within and beyond MPAs and adjacent control areas. Further, population genetics and parentage studies were applied, allowing for estimation of gene flow, and novel work on sexual selection in lobsters. Additional studies have evaluated MPA effects on coastal cod (Gadus morhua), and on commercially harvested labrids (Ctenolabrus rupestris and Symphodus melops) and anadromous brown trout (Salmo trutta). Together, these studies reported effects of protection pertaining to increased population density, survival, body size and phenotypic diversity, changes in emigration and interaction with surrounding fisheries, and alteration of selection pressure on morphological- and behavioral traits. Designation of MPAs in close collaboration with fishers and managers, long-term monitoring, inclusion of citizen science and evolving research protocols—also including fisheries data—have revealed novel effects of protection and harvesting on marine populations, thus providing substantial contributions to conservation science. Moreover, knowledge of MPA effects on coastal species has impacted harvest regulations showing the utility of MPAs as empirically documented management tools in Norway.

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“…In particular, transient visits to soft-bottom habitats by cod may have resulted in substantial shedding of eDNA particles and subsequent high detection rates of cod eDNA at both soft-and hard-bottom habitats. Similarly, vertical use of the water column by cod (Freitas et al, 2021), as opposed to limited movement within the vertical dimension by the remaining focal species, also likely contributed to the ubiquitous detection of cod eDNA across our surface water samples (Figure 3; Figure S5). As we only used 1 L samples and three qPCR replicates in this study, this possibly limited the ability for statistically discerning habitat patterns for cod.…”

Section: Codmentioning

confidence: 94%

Environmental DNA reveals fine‐scale habitat associations for sedentary and resident marine species across a coastal mosaic of soft‐ and hard‐bottom habitats

et al. 2022

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Accurate knowledge on spatiotemporal distributions of marine species and their association with surrounding habitats is crucial to inform adaptive management actions responding to coastal degradation across the globe. Here, we investigate the potential use of environmental DNA (eDNA) to detect species–habitat associations in a patchy coastal area of the Baltic Sea. We directly compare species‐specific qPCR analysis of eDNA with baited remote underwater video systems (BRUVS), two non‐invasive methods widely used to monitor marine habitats. Four focal species (cod Gadus morhua, flounder Platichthys flesus, plaice Pleuronectes platessa, and goldsinny wrasse Ctenolabrus rupestris) were selected based on contrasting habitat associations (reef‐ vs. sand‐associated species), as well as differential levels of mobility and residency, to investigate whether these factors affected the detection of species–habitat associations from eDNA. To this end, a species‐specific qPCR assay for goldsinny wrasse is developed and made available herein. In addition, potential correlations between eDNA signals and abundance counts (MaxN) from videos were assessed. Results from Bayesian multilevel models revealed strong evidence for a sand association for sedentary flounder (98% posterior probability) and a reef association for highly resident wrasse (99% posterior probability) using eDNA, in agreement with BRUVS. However, contrary to BRUVS, eDNA sampling did not detect habitat associations for cod or plaice. We found a positive correlation between eDNA detection and MaxN for wrasse (posterior probability 95%), but not for the remaining species and explanatory power of all relationships was generally limited. Our results indicate that eDNA sampling can detect species–habitat associations on a fine spatial scale, yet this ability likely depends on the mobility and residency of the target organism, with associations for sedentary or resident species most likely to be detected. Combined sampling with conventional non‐invasive methods is advised to improve detection of habitat associations for mobile and transient species, or for species with low eDNA concentrations.

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Sea temperature effects on depth use and habitat selection in a marine fish community

Abstract: This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

Cited by 46 publications

References 61 publications

Impact of Abnormal Climatic Events on the CPUE of Yellowfin Tuna Fishing in the Central and Western Pacific

Impact of Abnormal Climatic Events on the CPUE of Yellowfin Tuna Fishing in the Central and Western Pacific

Restoration of Abundance and Dynamics of Coastal Fish and Lobster Within Northern Marine Protected Areas Across Two Decades

Environmental DNA reveals fine‐scale habitat associations for sedentary and resident marine species across a coastal mosaic of soft‐ and hard‐bottom habitats

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