Evaluation of potential sustainability of deep-sea fisheries for grenadiers (Macrouridae)

Devine, Jennifer A.; Watling, Les; Cailliet, Gregor M.; Drazen, Jeffrey C.; Durán-Muñoz, P.; Орлов, А. М.; Bezaury, J

doi:10.1134/s0032945212100062

Cited by 20 publications

(17 citation statements)

References 46 publications

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“…Data about its biology, population structure and dynamics are scarce, even though it is an important part of the by-catch in the red fish and the Greenland halibut fisheries (Garabana et al 2016;Gonzales Costas and Murua, 2005; Gonzales costas 2010). Life history traits of this species are similar to those of other deep sea fishes: it lives long (up to 25 years according to Lorance et al (2008) and Drazen et al (2012)), grows slowly and has low fecundity, between 14,000 and 80,000 eggs (Devine et al, 2012;Fossen et al, 2003;Murua, 2003. Spawning has been documented across the species' geographic distribution in late Winter/early Spring (Magnússon and Magnússon, 1995;Savvatimsky, 1989), although geographical differences in time of spawning might exist (Lorance et al, 2008;Garabana et al 2016).…”

Section: Introductionsupporting

confidence: 53%

Genetic homogeneity in the deep-sea grenadier Macrourus berglax across the North Atlantic Ocean

Coscia

Castilho

Massa-Gallucci

et al. 2018

Deep Sea Research Part I: Oceanographic Research Papers

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Paucity of data on population structure and connectivity in deep sea species remains a major obstacle to their sustainable management and conservation in the face of ever increasing fisheries pressure and other forms of impacts on deep sea ecosystems. The roughhead grenadier Macrourus berglax presents all the classical characteristics of a deep sea species, such as slow growth and low fecundity, which make them particularly vulnerable to anthropogenic impact, due to their low resilience to change. In this study, the population structure of the roughhead grenadier is investigated throughout its geographic distribution using two sets of molecular markers: a partial sequence of the Control Region of mitochondrial DNA and species-specific microsatellites. No evidence of significant structure was found throughout the North Atlantic, with both sets of molecular markers yielding the same results of overall homogeneity. We posit two non-mutually exclusive scenarios that can explain such outcome: i) substantial high gene flow among locations, possibly maintained by larval stages, ii) very large effective size of post-glacially expanded populations. The results can inform management strategies in this by-caught species, and contribute to the broader issue of biological connectivity in the deep ocean.

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Section: Introductionsupporting

confidence: 53%

Genetic homogeneity in the deep-sea grenadier Macrourus berglax across the North Atlantic Ocean

Coscia

Castilho

Massa-Gallucci

et al. 2018

Deep Sea Research Part I: Oceanographic Research Papers

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“…Macrourid fisheries occur on the upper and middle continental slopes, either as by-catch (most common) or as target species (Devine et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal patterns of macrourid fish species in the northern Mediterranean Sea

et al. 2020

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The present study describes for the first time the spatial distribution of five macrourid species throughout the Mediterranean Sea and analyses depth, geographical and time-related trends regarding their abundance, biomass and mean fish weight. The data were collected as part of the MEDITS annual bottom trawl survey carried out by several European Mediterranean countries from 1994 to 2015, using the same standardized gear and sampling protocol. The most represented species in terms of abundance and biomass was Coelorinchus caelorhincus. The bathymetric trend was different for each species. The shallowest occurring species was C. caelorhincus, followed by Hymenocephalus italicus and Nezumia sclerorhynchus, while Nezumia aequalis and Trachyrincus scabrus were the deepest. Overall, the mean weight of all the species increased with depth. C. caelorhincus and H. italicus occurred in the entire study area: the first species showed relatively high catches in most areas, while the second was more abundant in the central and easternmost areas. N. aequalis and T. scabrus were mainly reported in the western basin, and N. sclerorhynchus in the central-eastern areas of the Mediterranean. An increasing inter-annual trend in abundance was only detected for C. caelorhincus and N. sclerorhynchus, while variable fluctuations were observed in the other species.

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“…Qualitative scoring systems are often considered useful tools for evaluating vulnerability of marine stocks to fishing pressure, particularly for prioritizing research and management of fisheries according to risk of over-exploitation [ 47 , 57 , 58 ]. However, these frameworks are often subjective and not reproducible.…”

Section: Discussionmentioning

confidence: 99%

A quantitative evaluation of a qualitative risk assessment framework: Examining the assumptions and predictions of the Productivity Susceptibility Analysis (PSA)

Hordyk

Carruthers

2018

PLoS ONE

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Qualitative risk assessment frameworks, such as the Productivity Susceptibility Analysis (PSA), have been developed to rapidly evaluate the risks of fishing to marine populations and prioritize management and research among species. Despite being applied to over 1,000 fish populations, and an ongoing debate about the most appropriate method to convert biological and fishery characteristics into an overall measure of risk, the assumptions and predictive capacity of these approaches have not been evaluated. Several interpretations of the PSA were mapped to a conventional age-structured fisheries dynamics model to evaluate the performance of the approach under a range of assumptions regarding exploitation rates and measures of biological risk. The results demonstrate that the underlying assumptions of these qualitative risk-based approaches are inappropriate, and the expected performance is poor for a wide range of conditions. The information required to score a fishery using a PSA-type approach is comparable to that required to populate an operating model and evaluating the population dynamics within a simulation framework. In addition to providing a more credible characterization of complex system dynamics, the operating model approach is transparent, reproducible and can evaluate alternative management strategies over a range of plausible hypotheses for the system.

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Evaluation of potential sustainability of deep-sea fisheries for grenadiers (Macrouridae)

Cited by 20 publications

References 46 publications

Genetic homogeneity in the deep-sea grenadier Macrourus berglax across the North Atlantic Ocean

Genetic homogeneity in the deep-sea grenadier Macrourus berglax across the North Atlantic Ocean

Spatio-temporal patterns of macrourid fish species in the northern Mediterranean Sea

A quantitative evaluation of a qualitative risk assessment framework: Examining the assumptions and predictions of the Productivity Susceptibility Analysis (PSA)

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