Gonzalo Mucientes

Gonzalo Mucientes
Spanish National Research Council | CSIC · Instituto de Investigaciones Marinas (IIM)

Marine Ecologist

About

72
Publications
33,895
Reads
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1,261
Citations
Citations since 2016
47 Research Items
1090 Citations
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2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
Introduction
My research is focused on understanding the behavioural mechanisms and the ecology of marine predator movements. Particularly I am interested in the biology, ecology and behaviour of pelagic sharks under fishing pressure -mainly shortfin mako (Isurus oxyrinchus) and blue shark (Prionace glauca). In combination with my academic activity, I regularly get involved in scientific surveys and other research projects as biologist or scientific diver. Enthusiastic wildlife photographer and naturalist.
Additional affiliations
March 2019 - present
Spanish National Research Council
Position
  • Researcher
Description
  • Monitoring of behaviour of coastal species with acoustic telemetry and assessment of performance of marine protected area
January 2018 - February 2019
University of Porto
Position
  • Researcher
Description
  • Research Fellow on ecology of pelagic sharks
June 2017 - July 2017
Spanish National Research Council
Position
  • Researcher
Description
  • Flemish Cap Survey 2017

Publications

Publications (72)
Article
Full-text available
Large pelagic sharks are declining in abundance in many oceans owing to fisheries exploitation. What is not known however is whether within-species geographical segregation of the sexes exacerbates this as a consequence of differential exploitation by spatially focused fisheries. Here we show striking sexual segregation in the fastest swimming shar...
Article
Full-text available
Significance Shark populations are declining worldwide because of overexploitation by fisheries with unknown consequences for ecosystems. Although the harvest of oceanic sharks remains largely unregulated, knowing precisely where they interact with fishing vessels will better aid their conservation. We satellite track six species of shark and two e...
Article
Full-text available
Effective ocean management and conservation of highly migratory species depends on resolving overlap between animal movements and distributions and fishing effort. Yet, this information is lacking at a global scale. Here we show, using a big-data approach combining satellite-tracked movements of pelagic sharks and global fishing fleets, that 24% of...
Article
Full-text available
Global abundances of oceanic pelagic sharks have declined due to overfishing. Internationally protected shark species remain at risk due to indiscriminate bycatch in longline fisheries with under-reported catches affecting reliability of population assessments for management. However, the scale of under-reporting remains poorly understood. Here we...
Article
Full-text available
La liebre ibérica (Lepus granatensis Rosenhauer, 1856) tiene su límite de distribución occidental al sur de la dorsal galega. En el presente trabajo se aportan nuevos datos sobre la situación de esta especie tras 16 años de muestreos. Se calcularon los índices de abundancia relativa de liebre ibérica en la dorsal galega mediante censos nocturnos re...
Article
Full-text available
Knowledge of the three-dimensional movement patterns of elasmobranchs is vital to understand their ecological roles and exposure to anthropogenic pressures. To date, comparative studies among species at global scales have mostly focused on horizontal movements. Our study addresses the knowledge gap of vertical movements by compiling the first globa...
Article
Full-text available
Knowledge of the three-dimensional movement patterns of elasmobranchs is vital to understand their ecological roles and exposure to anthropogenic pressures. To date, comparative studies among species at global scales have mostly focused on horizontal movements. Our study addresses the knowledge gap of vertical movements by compiling the first globa...
Article
Discard reduction is a cornerstone of the European Common Fisheries Policy. The discard ban policy, which aims to reduce fisheries discards, is particularly challenging for small-scale fisheries. Demonstrating high survival rates of discarded individuals may provide flexibility to the application of the discard ban through the so-called survival ex...
Article
Full-text available
Variations in stable carbon and nitrogen isotope compositions in incremental tissues of pelagic sharks can be used to infer aspects of their spatial and trophic ecology across life-histories. Interpretations from bulk tissue isotopic compositions are complicated, however, because multiple processes influence these values, including variations in pr...
Article
• 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. • Elasmobranchs are particularly vulnerable to exploitation. Within this group of fish, the implementation of species-specific conservation actions has b...
Article
Full-text available
106,107 ✉ replying to A. V. Harry & J. M. Braccini Nature https://doi.org/10.1038/s41586-021-03463-w (2021) Our global analysis 1 estimated the overlap and fishing exposure risk (FEI) using the space use of satellite-tracked sharks and longline fishing effort monitored by the automatic identification system (AIS). In the accompanying Comment, Harry...
Article
This article is a response to Murua et al.'s Matters Arising article in Nature, "Shark mortality cannot be assessed by fishery overlap alone," which arose from arising from N. Queiroz et al. Nature https://doi.org/10.1038/s41586-019-1444-4 (2019).
Article
Dytiscids prey on a variety of items including other invertebrates but also larger prey such as frogs and fish. However, there have been no reports concerning predation on caudata adults by larvae of dytiscids. In this paper, we describe a predation event by a larva of diving beetles of the species Dystiscus marginalis Linnaeus, 1758 on an adult Ib...
Article
Full-text available
In the pelagic environment diel vertical movements (DVM) are widespread across taxa, from zooplankton ascending from day-time depths into surface layers at night to avoid visual predators, to apex predators following prey movements to maximise foraging opportunities. The drivers of DVM in large predators such as pelagic sharks have only recently be...
Article
Full-text available
The global lockdown to mitigate COVID-19 pandemic health risks has altered human interactions with nature. Here, we report immediate impacts of changes in human activities on wildlife and environmental threats during the early lockdown months of 2020, based on 877 qualitative reports and 332 quantitative assessments from 89 different studies. Hundr...
Article
Individual acoustic tracking is a valuable tool to understand the behavioral ecology of aquatic species and to inform conservation actions. In this study, we examined the spatial behavior of single individuals of four common coastal fish species (striped red mullet, Mullus surmuletus;corkwing wrasse, Symphodus melops;pollack Pollachius pollachius;a...
Article
Full-text available
Skipjack tuna were observed for the first time swimming in front of the bow of a fishing vessel during a tagging campaign in the North Atlantic. Video recordings show how tuna adapted their speed and direction to the vessel, using the pectoral fins to move from top to bottom and back and forth across the bow of the ship. We discuss the potential dr...
Article
Full-text available
Climate-driven expansions of ocean hypoxic zones are predicted to concentrate pelagic fish in oxygenated surface layers, but how expanding hypoxia and fisheries will interact to affect threatened pelagic sharks remains unknown. Here, analysis of satellite-tracked blue sharks and environmental modelling in the eastern tropical Atlantic oxygen minimu...
Article
Full-text available
As natural history disappears from our education, Gonzalo Mucientes and colleagues argue that technology can only take us so far in our comprehension of aquatic life. The Marine Biologist magazine
Article
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Killer whale populations throughout the world tend to exhibit dietary specialization, feeding selectively upon only a very small subset of prey species from the 200 species that they are known to predate. Here, we present details of a single observation of killer whales feeding upon a blue shark captured in a pelagic longline fishery in the northea...
Technical Report
Full-text available
La presente guía es el fruto del trabajo realizado durante el proyecto de investigación Monitoreo con Telemetría Acústica del Comportamiento de especies costeras y evaluación de la protección ejercida por un área marina protegida (TAC). El grupo de Ecología Pesquera del Departamento de Ecología y Recursos Marinos del Instituto de Investigaciones Ma...
Technical Report
Full-text available
Boletín de la Red de Seguimiento del Cambio Global en Parques Nacionales
Presentation
Full-text available
Todos los aspectos de la biología y ecología de las especies animales se desarrollan en el espacio. Por lo tanto, el estudio del papel que juegan los patrones espaciales en los procesos ecológicos (como la dinámica poblacional, interacciones entre especies o procesos de dispersión que finalmente afectan a su distribución) es vital para lograr una g...
Article
Full-text available
The site fidelity of ballan wrasse Labrus bergylta was studied using photo‐identification and external tagging. Five male individuals were observed to defend the same small territory composed of a few rocks during several reproductive seasons spanning 2 to 15 years. These results provide one of the strongest indications of long‐term very fine‐scale...
Article
Full-text available
In this paper we combine analyses of satellite telemetry and molecular data to investigate spatial connectivity and genetic structure among populations of shortfin mako (Isurus oxyrinchus) in and around Australian waters, where this species is taken in recreational and commercial fisheries. Mitochondrial DNA data suggest matrilineal substructure ac...
Poster
Full-text available
The shortfin mako shark Isurus oxyrinchus is one of the fastest sharks, reaching speeds of up to 70 km/h. Belonging to family Lamnidae it is the second-most common oceanic shark caught by high seas longlines, mainly because of the high value of shortfin mako fins and meat. North Atlantic reported catches currently exceed 3300 tons annually and the...
Technical Report
Full-text available
Galicia alberga en sus aguas una amplia diversidad de elasmobranquios. Se han registrado un total 45 especies de tiburones (Selachii), representando cerca del 8,5% del total descrito en todo el planeta, con una notable presencia de especies de aguas profundas. Ello responde a una tipología de hábitats igualmente amplia que es también la responsable...
Technical Report
Full-text available
INTRODUCCIÓN Los tiburones son un grupo que comprende especies poco resilientes, muchas de ellas objeto de una importante presión pesquera. Galicia, debido a su posición bio-geográfica, cuenta con una importante muestra de estos peces cartilaginosos. En este trabajo se enumeran las especies que viven en las aguas gallegas, con comentarios sobre su...
Poster
Full-text available
Blue shark Prionace glauca (L. 1758) (Carcharhinidae) is an oceanic–epipelagic and fringe littoral species worldwide distributed in temperate and tropical oceans. It is one of the most abundant, widespread, fecund and fastest growing sharks. Blue shark also is one of the most exploited shark species globally and in European waters. The anomalous pr...
Article
Cartilaginous fishes (sharks, rays and chimaeras) comprise a highly diversified group of basal vertebrates occupying a plethora of ecological aquatic niches. They represent critical components of marine ecosystems and food webs, although numerous species are threatened and almost half are poorly known. Genomic resources emerging from this basal jaw...
Article
Full-text available
Advances in satellite tracking and archival technologies now allow marine animal movements and behavior to be recorded at much finer temporal scales, providing a more detailed ecological understanding that can potentially be applicable to conservation and management strategies. Pelagic sharks are commercially exploited worldwide with current concer...
Article
Full-text available
Sex ratio is a fundamental demographic parameter with major implications for the dynamics, management, and conservation of animal populations. The objective was to study the main factors affecting the post-settlement population sex ratio (SR) of Octopus vulgaris off the NE Atlantic. We investigated the spatio-temporal dynamics in SR using more than...
Article
Full-text available
Highly migratory, cosmopolitan oceanic sharks often exhibit complex movement patterns influenced by ontogeny, reproduction, and feeding. These elusive species are particularly challenging to population genetic studies, as representative samples suitable for inferring genetic structure are difficult to obtain. Our study provides insights into the ge...
Technical Report
This Public Comment Draft Report provides details to the stakeholders and general public on the MSC assessment for the North and South Swordfish fishery prepared by the team. CLIENTS: Organización de Palangreros Guardeses (ORPAGU) & the fishing Spanish Confederation, Confederación Española de Pesca (CEPESCA)
Article
Full-text available
The anomalous presence of numerous blue shark Prionace glauca neonates and juveniles in shallow inshore waters of Galicia, north-west Spain, during the summers of 2014 and 2015 is reported. Changes in oceanographic conditions, high recruitment events or changes in the pupping area are discussed as possible causes of this unusual behaviour.
Article
Full-text available
Background Determining the habitat use of mobile marine species is important for understanding responses to climate change and aids the implementation of management and conservation measures. Inference of preferred habitat use has been greatly improved by combining satellite-based oceanographic data with animal tracking techniques. Although there h...
Article
Full-text available
The first updated and comprehensive checklist of Chondrichthyes from the southeast Pacific off Peru, based on the revision of scientific literature, is presented. The group of Chondrichthyes in the Peruvian coast is composed of 115 species that include 66 species of sharks, 43 species of batoids, and six species of chi-maeras. We present nine new r...
Article
Full-text available
Long-distance movements of animals are an important driver of population spatial dynamics and determine the extent of overlap with area-focused human activities, such as fishing. Despite global concerns of declining shark populations, a major limitation in assessments of population trends or spatial management options is the lack of information on...
Article
Full-text available
The first records of the redbanded seabream, Pagrus auriga Valenciennes, 1843 (Sparidae), and the bastard grunt, Pomadasys incisus (Bowdich, 1825) (Haemulidae), from Galician waters (NW Spain) are reported herewith. Both findings constitute the northernmost confirmed records of those fishes in the eastern Atlantic. The Galician waters seem to be an...
Chapter
Chondrichthyes species have a wide variety of reproductive strategies that can be broadly divided into two major categories: oviparous and viviparous species, the latter being further subdivided into aplacental (categorised in aplacental yolk sac, oophagy, adelphophagy, trophonemata) and placental species. More recently, viviparity has been divided...
Conference Paper
Little information is available regarding the haematophagous feeding of the anadromous Petromyzon marinus due to the difficulties in capturing lampreys and wounded hosts. Our results show that downstream migration of sea lamprey in the NW of the Iberian Peninsula (data recorded from 1997 to 2010) occurs between October and May with a peak in March...
Article
Limited information is available regarding habitat use and host species of the haematophagous feeding stage of the anadromous sea lamprey Petromyzon marinus Linnaeus, 1758, due to the difficulties in capturing feeding lampreys and wounded hosts. The aim of this study is to provide new records of P. marinus feeding on host species and to review the...
Article
Effective fisheries management must consider spatial aspects of population dynamics, and acoustic telemetry has been extensively used to provide information on movement over different temporal and spatial scales. Here we used a fixed-receiver array to examine the spatio-temporal movement patterns of Labrus bergylta Ascanius 1767, a species heavily...
Article
Full-text available
The occurrence of longfin mako Isurus paucus was confirmed over an extensive openocean area of the mid-North Atlantic, with a total of 68 new records of longfin mako sharks extracted from logbooks annotations between 1999 and 2011. New distributed range in the North mid Atlantic ranged between 6º and 44º N and 19º to 54º W and sea surface temperatu...
Presentation
Full-text available
The shortfin mako shark (Isurus oxyrinchus) is a highly migratory, pelagic species with circum-global distribution in tropical and temperate seas. This shark is commonly found in the Atlantic Ocean and are taken as bycatch in longlining and gillnetting operations for tuna and swordfish (Xiphias gladius), activities that have expanded rapidly during...
Article
Full-text available
The presence of the non-indigenous species, the black-pygmy mussel Limnoperna securis, was surveyed for the first time in the Rias of Pontevedra and Arousa, areas adjacent to the first location (Ria of Vigo) of this potential invader in Atlantic waters. Molecular identification of the mussels was conducted by PCR amplification and sequencing of nuc...
Article
Full-text available
An annotated checklist of the marine fishes from Galician waters is presented. The list is based on historical both literature records and on new revisions. The ichthyofauna list is composed by 398 species. It is diversified in 2 superclasses, 3 class, 35 orders, 139 families and 288 genuses. Perciformes is the most diverse order with 37 families,...