Inferring abundance trends of key species from a highly developed small-scale fishery off NE Atlantic

Alonso‐Fernández, Alexandre; Otero, Jaime; Bañón, Rafael; Campelos, José Manuel; Quintero, Fernando; Ribó, Jorge; Filgueira, Francisco Javier Roo; Juncal, Luisa; Lamas, Fabio; Gancedo, Asunción; Molares, José

doi:10.1016/j.fishres.2018.09.011

Cited by 19 publications

(15 citation statements)

References 94 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this sense, progressive reduction in the conservation status of fish stocks perceived by the recreational fishers was supported by decreases up to 76% in body size of European conger, European seabass, maragota, pinto and white seabream estimated by Pita and Freire (2014) in the last 50 years ( Table 2). Changes in conservation status were also similar for several fish stocks to abundance trends estimated by Alonso-Fernández et al (2019). The smaller time series analyzed by Alonso-Fernández et al (2019) (16 years) than that in this study (up to 50 years) could explain the lower decreases that they found, and even the small increases shown for ballan wrasse, common octopus and white seabream ( Table 2).…”

Section: Discussionsupporting

confidence: 84%

“…The improvements in the monitoring, reporting, enforcement and control of commercial fisheries in the last decade could have also hyper-stabilize some trends in commercial landings (Villasante et al, 2016). In spite of a reduction in the fisheries effort (Alonso-Fernández et al, 2019;, technical operational improvements (e.g., hydraulic haulers) could have also have an impact on commercial landings. Nevertheless, trends in commercial catches are in general consistent with recreational fishers' perceptions about declines in stocks.…”

Section: Discussionmentioning

confidence: 99%

“…Long-term data on fish size and abundance of some identified target species were obtained from Pita and Freire 2014and Alonso-Fernández et al (2019). In all cases, population trends by species obtained from different sources were normalized to the interview-derived scale (from −2 to 2).…”

Section: Comparison Between Interviews and Biological Datamentioning

confidence: 99%

See 2 more Smart Citations

The Use of Recreational Fishers’ Ecological Knowledge to Assess the Conservation Status of Marine Ecosystems

et al. 2020

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The Use of Recreational Fishers’ Ecological Knowledge to Assess the Conservation Status of Marine Ecosystems

et al. 2020

View full text Add to dashboard Cite

“…The sampling unit was a set (i.e., the three linked traps), and species‐specific generalized linear mixed‐effect models (GLMMs) with a negative binomial distribution were fitted using the R package glmmTMB (Brooks et al 2017). Generalized linear mixed‐effect models are widely applied to spatiotemporal catch and length data in fisheries; this flexible modeling framework allows for assessing and accounting for the effects of environmental covariates and random effects and provides standardized CPUE and length estimates (Maunder and Punt 2004; Thorson and Minto 2015; Alonso‐Fernández et al 2019). The following model structure, defined a priori, was applied:…”

Section: Methodsmentioning

confidence: 99%

“…Variation in the spatiotemporal distribution of fisheries and affected species could also have a considerable impact on the selectivity pattern and catch rates in SSFs. This awareness is important for stock assessments, as catch and length data are often used to monitor temporal changes in stock status within SSFs, but such trends are likely to be biased if depth and other important environmental covariates are not accounted for (Glazer and Butterworth 2002; Bigelow and Maunder 2007; Alonso‐Fernández et al 2019).…”

Section: Species Depth Range (M) Life History Characteristics Norwegimentioning

confidence: 99%

Mind the Depth: The Vertical Dimension of a Small‐Scale Coastal Fishery Shapes Selection on Species, Size, and Sex in Wrasses

et al. 2020

View full text Add to dashboard Cite

Small-scale fisheries (SSFs) tend to target shallow waters, but the depth distributions of coastal fish can vary depending on species, size, and sex. This creates a scope for a form of fishing selectivity that has received limited attention but can have considerable implications for monitoring and management of these fisheries. We conducted a case study on the Norwegian wrasse fishery, a developing SSF in which multiple species are caught in shallow waters (mean depth = 4.5 m) to be used as cleaner fish in aquaculture. Several of these wrasses have life histories and behaviors that are sensitive to selective fishing mortality, such as sexual size dimorphism, paternal care, and sex change. An experimental fishery was undertaken over three sampling periods in 2018. Data on catch, length, and sex of wrasses across a depth gradient (0-18 m) were collected and analyzed. We found that depth distributions were species specific and the vertical overlap with the fishery was high for Corkwing Wrasse Symphodus melops and Ballan Wrasse Labrus bergylta, which were most abundant at depths less than 5 m. Three other wrasse species had invariant or increasing abundance with depth and were therefore less likely to be negatively impacted by this fishery. Body size was positively correlated with depth for these wrasses, and sex ratio became more male biased for the Corkwing Wrasse, the only species that could be visually sexed. This study demonstrates that depth can have strong effects on fishing selectivity at multiple scales and that such knowledge is necessary to develop management strategies that

show abstract

Drivers of spatial behaviour of the endangered undulate skate, Raja undulata

Leeb

Villegas‐Ríos

Mucientes

et al. 2021

Aquatic Conservation

Self Cite

View full text Add to dashboard Cite

1. Knowledge of the spatial behaviour of aquatic living resources is essential to assess their vulnerability to environmental and anthropogenic stressors and inform efficient management strategies.2. Elasmobranchs are particularly vulnerable to exploitation. Within this group of fish, the implementation of species-specific conservation actions has been challenging due to insufficient information on their biology and ecology.3. In this study, acoustic telemetry was used to investigate the seasonal variation, diel patterns, and biological and sea temperature effects on the spatial behaviour of the endangered undulate skate, Raja undulata, within a marine protected area in north-west Spain.4. Movement and behaviour were mainly driven by diel and seasonal patterns. The presence of the tagged skates in the study area peaked during summer. Space use

show abstract

Inferring abundance trends of key species from a highly developed small-scale fishery off NE Atlantic

Cited by 19 publications

References 94 publications

The Use of Recreational Fishers’ Ecological Knowledge to Assess the Conservation Status of Marine Ecosystems

The Use of Recreational Fishers’ Ecological Knowledge to Assess the Conservation Status of Marine Ecosystems

Mind the Depth: The Vertical Dimension of a Small‐Scale Coastal Fishery Shapes Selection on Species, Size, and Sex in Wrasses

Drivers of spatial behaviour of the endangered undulate skate, Raja undulata

Contact Info

Product

Resources

About