Gustavo Freire de Carvalho-Souza

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• Biologist
• PostDoc Researcher at Spanish National Research Council

Life history parameters are indicators of stock structure and the dynamics of populations. In this work, we examine multiple life-history parameters (size distribution, growth, mortality, and longevity) of Palaemon longirostris H. Milne Edwards, 1837 inhabiting the estuarine temperate waters of the Guadalquivir estuary through size-frequency distri...

This study provides a comprehensive analysis of the eco-physiological responses of the blue crab (Callinectes sapidus) to variations in salinity, shedding light on its adaptability and invasive success in aquatic environments. Gender-specific differences in osmoregulation and Electron Transport System (ETS) activity highlight the importance of cons...

Coastal environments, such as bays, are essential to the development of fishery resources due to their economic and ecological importance. This paper presents an updated checklist of coastal marine fishes as part of a long-term monitoring program in Aratu Bay (2014–2024), Bahia state, eastern Brazil. A total of 109 species belonging to 58 families...

In 2015, an unknown snapping shrimp of the genus Alpheus was collected in the San Pedro River inlet (Bay of Cadiz, SW Spain). Initially, its identification was not possible only based on DNA barcoding or morphology, considering the difficulties in the Alpheus taxonomy and the low percentage of DNA sequences of Alpheus spp. available in public datab...

This paper reports the first record of a rare deep-sea fish Ijimaia loppei Roule, 1922 (Ateleopodiformes: Ateleopodidae) in the Southwest Iberian Peninsula, based on a single specimen (total length 1271 mm) bottom trawled in the mud volcano field in the Gulf of Cadiz, Spain (36º 28′ 54'' N, 7º 07′ 47'' W), at a depth of 585 m, on April 24, 2024. Th...

The Atlantic croaker Micropogonias undulatus, a sciaenid fish native to the North Atlantic American coast, holds importance in recreational and commercial fisheries. Moreover, its potential as an invasive species should be noted, given its expansion and establishment in Atlantic European waters. This study reports its southernmost occurrence in Eur...

The ever-accelerating process of introduction and establishment of invasive alien species (IAS) in marine waters requires engaging different actors in the management and planning. To address this challenge, stakeholders need an integrated approach for defining actions of control and management within an ecosystem-based framework: to seek and enhanc...

A new invasive snapping shrimp from the Alpheus lobidens De Haan, 1849 species complex has become one of the most frequently observed crustaceans in certain saltmarshes along the southwestern Spanish coast. The rst place in Europe where this invasion has occurred is reported in this study; however, little is known about this species, even within it...

The present study reports the occurrence of several specimens of the penaeid shrimp Penaeus notialis in the Gulf of Cadiz (Spain). The southern pink shrimp is a penaeid originating from east and west Atlantic tropical coastal waters. New observations of tropical species in temperate waters have increased in the last 20 years. This species may have...

Two specimens of the deep–sea fish Tetragonurus cuvieri Risso, 1810 and Notacanthus bonaparte Risso, 1840 were captured in the Gulf of Cadiz on January 2023 at a depth of 14.15 m and on March 2023 at a depth of 532 m, respectively. The identity of the specimens was verified using both morphological and genetic criteria. In this study, we compile in...

Climate change may enhance the establishment of introduced species, as well as the poleward shift in distribution of numerous species over decades. Long-term research and monitoring of an ecosystem at the southernmost point of the Atlantic coast of Europe should be an important priority in order to detect and understand trends in species compositio...

Life history parameters are indicators of stock structure and for the dynamics of biological populations. In this work, we examine multiple life-history parameters (size distribution, growth, mortality, and longevity) of Palaemon longirostris H. Milne Edwards, 1837 inhabiting the estuarine temperate waters of the Guadalquivir estuary through size-f...

Two specimens of the deep-sea fish Tetragonurus cuvieri (Risso, 1810) and Notacanthus bonaparte (Risso, 1840) were captured in the Gulf of Cadiz on January 2023 at a depth of 14.15 m and on March 2023 at a depth of 532 m, respectively. The identity of the specimens was verified using both morphological and genetic criteria. They are uncommonly obse...

The introduction of non-indigenous species to aquatic ecosystems is one of the main threats to global biodiversity. This paper reports the occurrence of the blue swimmer crab Portunus segnis in southwestern European waters (i.e., the Gulf of Cadiz). We discuss the invasive potential of P. segnis and possible mechanisms of its expansion into this ne...

The present study reports the occurrence of several specimens of the penaeid shrimp Penaeus (Farfantepenaeus) notialis in the Gulf of Cadiz (Spain). The southern pink shrimp is a penaeid original from east and west Atlantic tropical coastal waters. New observations of tropical species in temperate waters have increased in the last twenty years. Thi...

The analysis of body relationships and condition factors are useful tools in studies of marine populations, and they have been widely used in fishery research and management. In this study, width–weight (WWR) and length–weight (LWR) relationships and Fulton’s condition factors were analyzed for six commercially important decapod crustacean species...

Scavengers play a key role in nutrient cycling and in the energy transfer between the terrestrial-aquatic interface (Beasley et al. 2012). Obligatory scavengers feed exclusively on carrion, while some predator species act opportunistically as facultative scavengers when carrion is available (Morton 2006; Moleón and Sánchez-Zapata 2015). Species of...

During a diving survey on soft-bottom habitats in the Gulf of Cadiz (Southwestern Spain), the use of the sea cucumber Holothuria arguinensis (Echinodermata, Holothuriidae) as a shelter by juvenile Senegal’s sea bream Diplodus bellottii (Chordata: Sparidae) was observed. Eight juvenile sea bream D. bellottii were videoed sheltering under the sea cuc...

Seafood is an essential source of protein globally. As its demand continues to rise, balancing food security and the health of marine ecosystems has become a pressing challenge. Ecosystem-based fisheries management (EBFM) has been adopted by the European Union (EU) Common Fisheries Policy (CFP) to meet this challenge by accounting for the multiple...

This study provides the first comprehensive description of the Gulf of Cadiz (SW Spain) marine zooplankton community. To do this we compiled information from a number of surveys and monitoring programs carried out in the area over the last 14 years. Using this time-series of quarterly (3 times per year) resolution, we describe their general composi...

Los modelos y análisis de ecosistemas son herramientas importantes que pueden ayudar a las partes interesadas a comprender sistemas complejos y evaluar cómo estos sistemas responden a los posibles cambios del ecosistema. En la presente tesis doctoral, ha sido investigado el estado del ecosistema del golfo de Cádiz (GoC) y la evolución temporal de s...

Essential fish habitats (EFHs) are all aquatic habitats and substrates fundamental for spawning, breeding, feeding and/or growing to maturity. Estuaries are a good example of this because they play an important role as nursery grounds for several marine species. Despite their importance for completing the life cycle of some fish stocks, little is k...

The Gulf of Cadiz socio-ecosystem (SW Spain) is characterized by a focal ecosystem component – the estuary of the Guadalquivir River – that has an influence on the marine ecosystem – serves as a nursery area – and at the same time concentrates a great number of sectoral human activities. This nursery role particularly affects the anchovy fishery, w...

The Gulf of Cadiz socio-ecosystem is characterized by a focal ecosystem component-the estuary of the Guadalquivir River-that has an influence on the marine ecosystem-serves as a nursery area-and at the same time concentrates a great number of sectoral human activities. This nursery role particularly affects the anchovy fishery, which is the most ec...

The Gulf of Cadiz socio-ecosystem is characterized by a focal ecosystem component –the estuary of the Guadalquivir River– that has an influence on the marine ecosystem –serves as a nursery area– and at the same time concentrates a great number of sectoral human activities. This nursery role particularly affects the anchovy fishery, which is the mos...

The Guadalquivir estuary (SW Spain) is a non-stratified estuary with a gradual change in salinity. It supports an important biodiversity and functions as a nursery area for many commercial species (e.g. anchovy) in the Gulf of Cadiz (GoC). The understanding of the interplay between the environmental forcing (bottom-up) and the trophic regulation is...

Natural drivers, acting at various spatio-temporal scales firstly determine the distribution and abundance of species. On top of this natural forcing we usually find anthropogenic effects. Disentangling the relative influence of these two sources of variability has always been a challenge in ecology, and particularly in fisheries science. The Guada...

The authors regret that errors were present in Table 1. A corrected version of Table 1 can be found below.

Yes, we are eating plastic-ingesting fish. A baseline assessment of plastic pellet ingestion by two species of important edible fish caught along the eastern coast of Brazil is described. The rate of plastic ingestion by king mackerel (Scomberomorus cavalla) was quite high (62.5%), followed by the Brazilian sharpnose shark (Rhizoprionodon lalandii,...

This study presents seasonal variation in the zooplankton composition of the Gulf of Cádiz was studied between 2001 and 2012. Samples were collected three times per year, in the spring, summer and autumn at three stations situated along a transect perpendicular to the coast. The total zooplankton abundance during the summer was higher than in the s...

Understanding how juveniles of the commercially important carangid species are associated with floating substrata is important to surveys aimed at potential effects on fisheries, species-habitats relationships and human impacts. Herein, the first record of association between the juvenile carangid fishes Caranx crysos, the jellyfish, Aurelia sp. an...

Following the steps of the ICES Integrated Ecosystem Assessment (IEA) groups, this poster presents an overview of the Gulf of Cadiz ecosystem and preliminary results carried out within the Working Group on Ecosystem Assessment of Western European Shelf Seas (WGEAWESS). First we describe the main features and drivers of this ecosystem and show their...

The present study was designed to analyze the efficiency of visible implant fluorescent elastomers (VIFE) in five spiders of the family Theraphosidae. The individuals were marked on the ventral face of the articulations of the patella with the femur and of the meta-tarsus with the tibia on the first pair of legs. The animals were kept in individual...

A temática " lixo ou resíduos sólidos " tem sido alvo substancial nas práticas educativo-lúdicas realizadas por educadores ambientais, apresentando ampla abordagem e possibilidades no ensino das ciências, seja nas escolas ou espaços alternativos. Resumo A temática " lixo ou resíduos sólidos " tem sido alvo substancial nas práticas educativo-lúdicas...

RESUMO A utilização de lixo marinho por organismos recifais é citada para algumas espécies de crustáceos. No presente estudo documentamos pela primeira vez a utilização de lixo marinho como refúgio por espécies de peixes recifais: Acanthurus bahianus, Astrapogon puncticulatus, Epinephelus adscensionis, Haemulon parra, Malacoctenus sp., Pareques acu...

RESUMO O presente trabalho buscou descrever o comportamento de cobertura do ouriço-lilás, Lytechinus variegatus utilizando o lixo marinho, em costões rochosos da Baia de Todos os Santos. As observações foram obtidas em dois costões rochosos (Farol da Barra e Porto da Barra), sendo realizados 60 censos visuais subaquáticos utilizando um método de am...

RESUMO Relatamos aqui a associação de abrigo de peixes marinhos com águas-vivas e também sacos plásticos flutuantes. Nossas observações foram realizadas em três costões rochosos localizados na entrada da Baía de Todos os Santos, nordeste do Brasil, um ponto com registros de contaminação por resíduos sólidos. O caso apresentado mostra onde jovens pe...

Avaliação do Implante Visível de Elastómero Fluorescente (VIFE) em Tricogaster trichopterus (Pallas, 1770) em cativeiro, incluindo informações sobre a técnica utilizada RESUMO: (Avaliação do Implante Visível de Elastómero Fluorescente (VIFE) em Tricogaster trichopterus (Pallas, 1770) em cativeiro, incluindo informações sobre a técnica utilizada). O...

The parasite–host interactions among two isopod species Cymothoa spinipalpa and Rocinela signata and five marine fish species, Chloroscombrus chrysurus, Caranx crysos, Oligoplites saliens, Lutjanus synagris and Trichiurus lepturus, are described here and registered for the first time on the coast of Bahia, north-eastern Brazil. Based on samples usi...

The present work reported the formation of mixed groups between Tursiops truncatus and Steno bredanensis in the Bay of Todos os Santos and suggests that these associations are frequent in the coast of Bahia, eastern Brazil.