Daniel E. Figueroa

National University of Mar del Plata

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Juan M. Dı́az de Astarloa

Consejo Nacional de Investigaciones Científicas y Técnicas

Santiago A. Barbini

National University of Mar del Plata

Mauro Belleggia

Institute of Marine and Coastal Research

María B. Cousseau

National University of Mar del Plata

Ezequiel Mabragaña

Fundación Ciencias Exactas y Naturales

Claudia Bremec

Consejo Nacional de Investigaciones Científicas y Técnicas

G. Delpiani

National University of Mar del Plata

Lorena B. Scenna

Consejo Nacional de Investigaciones Científicas y Técnicas

Luis O. Lucifora

Consejo Nacional de Investigaciones Científicas y Técnicas

M. C. Spath

Institute of Marine and Coastal Research

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Consejo Nacional de Investigaciones Científicas y Técnicas

115

Fundación Ciencias Exactas y Naturales

National University of Mar del Plata

Instituto Nacional de Investigacion y Desarrollo Pesquero

Institute of Marine and Coastal Research

Centro Científico Tecnológico - San Juan

Centro Científico Tecnológico - Tucumán

Instituto de Investigacións Mariñas

Centro Científico Tecnológico Mar del Plata

University of Buenos Aires

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Rayas, chuchos y otros batoideos del Atlántico Sudoccidental (34ºS-55ºS)

M.B. Cousseau Daniel E. Figueroa Juan M. Dı́az de Astarloa Lucifora. L.O.Ezequiel Mabragaña

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Citations (34)

Reproductive biology of the cockfish, Callorhinchus callorynchus (Chondrichthyes: Callorhinchidae), in coastal waters of the northern Argentinean Sea

Neotropical Ichthyology (2017)

Melisa A. Chierichetti Lorena B. Scenna Edgardo E. Di Giácomo Paola M. Ondarza Daniel E. Figueroa

ABSTRACT The cockfish, Callorhinchus callorynchus, is a widely distributed holocephalan in the south-western Atlantic and an important resource for Argentinean fisheries. The reproductive characteristics of this species were studied in northern Argentinean coastal waters, where specimens arrive seasonally (winter-spring). Sexual dimorphism in maximum precaudal length (PCL) and total body mass (TM) was found, being females (PCL=630 mm; TM=3330 g; n=167) larger and heavier than males (PCL=482 mm; TM=1630 g; n=19). Maturity size for females was 466.22 mm PCL, representing 74% PCL of the largest female sampled. The mean number of ovarian follicles was 8.37 (± 4.84). The highest values of ovarian follicles diameter, gonadosomatic and oviducalsomatic indices were found in spring. A high proportion of mature females (44%) had atretic ovarian follicles, suggesting that they were in the resting stage of their reproductive cycle. The low number of mature males recorded and the absence of mature females with spermatophore masses or egg cases indicate that the study area would not be a reproductive zone. The seasonal presence of C. callorynchus in this region could be related to trophic movements. These results, obtained in an area with high fishing pressure on chondrichthyans, will be useful for implementing conservation and management measures.

Chondrichthyes

Spermatophore

Gonadosomatic Index

Sexual maturity

Sexual dimorphism

10.1590/1982-0224-20160137

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Citations (7)

Structure and tectonic evolution of the Interandean and Subandean Zones of the central Andean fold-thrust belt of Bolivia

Elsevier eBooks (2019)

Emilio A. Rojas Vera Pablo Giampaoli E. Gobbo Emilio Rocha G. Olivieri

Orogeny

Devonian

Basement

Anticline

10.1016/b978-0-12-816009-1.00016-2

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Citations (10)

Age and growth of diadromous Galaxias maculatus (Jenyns, 1842) in southernmost South America (54° S) including contribution of age classes to reproduction

Environmental Biology of Fishes (2018)

Javier Hernán Rojo Daniel E. Figueroa Claudia C. Boy

Life History Theory

10.1007/s10641-018-0765-8

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Citations (10)

Ecología trófica del congrio de profundidad Bassanago albescens en el Atlántico Sudoccidental y sus implicancias para el manejo ecosistémico de las pesquerías

Marine and Fishery Sciences (MAFIS) (2021)

Gabriela E. Blasina Luciano Izzo Agustín M. De Wysiecki Daniel E. Figueroa

En el presente estudio se determina la composición de la dieta y estrategia alimentaria del congrio de profundidad Bassanago albescens en el Atlántico Sudoccidental (35° S-45° S), a partir del análisis del contenido estomacal de 222 individuos. La dieta consistió de cefalópodos, seguidos por isópodos, anfípodos, ofiuroideos, braquiuros y poliquetos. Los resultados mostraron diferencias significativas en la composición de la dieta entre sexos, zonas y clases de tallas que se vieron reflejadas en los cambios de la estrategia de forrajeo. Se registró un aumento progresivo en el consumo de Illex argentinus con el aumento del tamaño de B. albescens, donde los individuos más grandes mostraron una especialización en el consumo de esta presa. Estos cambios alimentarios estarían relacionados a limitaciones morfológicas y habilidades asociadas al tamaño corporal de B. albescens, teniendo los individuos más grandes acceso a presas de mayor tamaño. Nuestros resultados ayudan a comprender la biología de una especie que tiene una distribución simpátrica con dos especies clave en las pesquerías de la Argentina: Merluccius hubbsi e I. argentinus, con evidencias de una fuerte interacción trófica entre ellas. Esta nueva información sobre los recursos involucrados permitiría una optimización del manejo pesquero bajo un criterio ecosistémico.

10.47193/mafis.3422021010605

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Dental abnormalities of the southern thorny skate Amblyraja doellojuradoi (Chondrichthyes, Rajidae)

Revista de biología marina y oceanografía (2012)

G. Delpiani Daniel E. Figueroa Ezequiel Mabragaña

Teeth morphology has been widely used in taxonomic, biological and fossil teeth studies of Chondrichthyes.Herein, dental abnormalities in Amblyraja doellojuradoi are described.Almost 10% of 182 specimens sampled presented any of these types of dental anomalies: (1) an additional incomplete tooth row between two complete rows, (2) an increasing tooth base size and division of its cusps until the complete splitting of teeth in the same row, and (3) an irregular tooth arrangement on the right side of the lower jaw.Possible causes producing these malformations such as mutation, damage by feeding or reproductive behavior are discussed.

Chondrichthyes

Skate

Elasmobranchii

10.4067/s0718-19572012000100012

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Citations (10)

PERSPECTIVES OF MARINE BIODIVERSITY STUDIES IN ARGENTINA

Gayana (2003)

Vivian A. Lutz Enrique E. Boschi Claudia Bremec María B. Cousseau Daniel E. Figueroa

This paper provides an overview of the research being carried out at the moment by a group of Argentinean scientists working on the subjects of marine biodiversity and oceanography.When the idea of the Census of Marine Life (CoML) was proposed following the Symposium held during the IAPSO-IABO conference in Mar del Plata in October 2001, there was a wide response from the marine scientific community.Information about current research projects, as well as plans for future work in the context of the CoML, were then obtained from about 70 scientists (Appendix I) belonging to 12 institutions located along the Argentinean coast (Appendix II, Figure 1).This has been used to illustrate what is currently being pursued in marine biodiversity in Argentina and which subjects are considered as priority for future research in the area.This paper is, thus, not an historical update of the knowledge of marine biodiversity, but it attempts to give an idea of the current situation and what is planned for the future.The development of an extensive database of what is known on marine biodiversity in the region is considered to be a necessity, but it constitutes a complete project on its own; as such it is included in the proposals for future work (see Future Work in this paper).It is emphasised that this synthesis is not exhaustive in the content of the topics being studied or in the number of researchers working in marine biodiversity in the country.It is, though, considered to be a representative sample of the knowledge in marine science in Argentina today.This is a starting point for the CoML project in South America and it is hoped that, as it develops, it will be improved by the active participation, advice and experience of many other scientists in the region.

Marine Biodiversity

Marine life

10.4067/s0717-65382003000200016

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Citations (7)

Eating catch of the day: the diet of porbeagle shark Lamna nasus (Bonnaterre 1788) based on stomach content analysis, and the interaction with trawl fisheries in the south‐western Atlantic (52° S–56° S)

Journal of Fish Biology (2021)

Mauro Belleggia Jorge H. Colonello Federico Cortés Daniel E. Figueroa

ABSTRACT This work examined the diet of the porbeagle shark Lamna nasus in the south‐west Atlantic Ocean (SWAO, Argentina, 52° S–56° S) by analysing the stomach content information obtained by scientific observers who sampled specimens captured as by‐catch on‐board commercial fishing vessels from 2010 to 2020. A total of 148 fishing sites were analysed, in which the estimated catch was composed mainly of hoki Macruronus magellanicus (56.00%) and southern blue whiting Micromesistius australis (33.13%). From 413 porbeagle sharks sampled (292 females and 121 males) ranging from 71 to 241 cm total length ( L T ) (mean: 179.76 ± 26.74 cm), 310 (75.06%) contained food in the stomachs. The forage fish were mainly hoki M. magellanicus (23.53%) and southern blue whiting M. australis (19.05%), followed by the Patagonian sprat Sprattus fuegensis (4.48%) and nototheniids (1.4%). Cephalopods and crustaceans accounted for 10% of the diet. The estimated trophic level was 4.35. Generalized linear models revealed that the consumption of hoki M. magellanicus and southern blue whiting M. australis increased with the L T of the porbeagle shark. Moreover, smaller porbeagle sharks preyed upon both small and large teleost fish, whereas larger porbeagle sharks predated exclusively upon large fish. The diet of porbeagle shark involved interactions with fisheries as it fed upon the fish species that constituted the main catch in the analysed fishing sites, as well as the main catches of the austral trawl fisheries. The ecological role of porbeagle shark observed in the SWAO exposed implications for fisheries management from a multispecies perspective.

Whiting

Sprat

10.1111/jfb.14864

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Citations (8)

Fish composition in a south-western Atlantic temperate coastal lagoon: spatial–temporal variation and relationships with environmental variables

Journal of the Marine Biological Association of the United Kingdom (2009)

Mariano González‐Castro Juan M. Dı́az de Astarloa María B. Cousseau Daniel E. Figueroa Sergio Matías Delpiani

Mar Chiquita, an irregularly shaped brackish-water coastal lagoon, is located in the Buenos Aires province of Argentina and considered since 1996 by the Coordination Council of the Man and Biosphere Program of UNESCO as a World Reserve of Biosphere. The present paper aims to study both the spatial and temporal variation of fish composition in this coastal lagoon and the influence of some environmental variables on the relative abundance of the main fish species. Monthly sampling surveys over a two-year period in three different areas were conducted, using a beach-seine net and three monofilament-gill nets with different mesh size. Twenty-eight species belonging to four bio-ecological categories were identified, five of them are new records for Mar Chiquita fish community. The correspondence analysis showed strong relationships between high salinity range and the abundance of Brevoortia aurea, Cynoscion guatucupa and Pomatomus saltatrix. Conversely, low salinity range corresponded to high abundance of Mugil platanus and Odontesthes argentinensis. High temperatures were corresponded with abundance of Micropogonias furnieri and Brevoortia aurea. In contrast, high abundance of both Odontesthes argentinensis and Oligosarcus jenynsii were corresponded to low temperatures. Brevoortia aurea, Mugil platanus and Odontesthes argentinensis were the most abundant species, representing more than 80% of the total capture. The group of estuarine-nondependent-marine fish presented the highest species richness. Estuarine-dependent-marine species presented for both juveniles and adults specimens the highest abundance values.

Mugil

10.1017/s0025315409003002

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Citations (54)

Spatio-temporal and ontogenetic changes in the diet of the Argentine hakeMerluccius hubbsi

Journal of the Marine Biological Association of the United Kingdom (2014)

Mauro Belleggia Daniel E. Figueroa Gabriela Irusta Claudia Bremec

The diet and the trophic level of the Argentine hake Merluccius hubbsi was investigated in the south-west Atlantic Ocean. Stomachs from 3405 specimens, ranging from 10 to 94 cm total length, collected on three research cruises carried out during winter 2011 and summer 2012, were examined at the laboratory. Dietary shifts related to sex, maturity stage, size, age, season, region and hour were examined using generalized linear models. The Argentine hake M. hubbsi fed mainly on zooplankton crustaceans ( Themisto gaudichaudii, Euphausia lucens and Munida spp.), followed by fish and cephalopods. During summer, cephalopods (mainly Illex argentinus ) were the main prey of M. hubbsi , indicating spatio-temporal changes in the diet. This work also revealed ontogenetic dietary changes associated with size, from zooplankton crustaceans during early life stages ( E. lucens, T. gaudichaudii and Munida spp.) to fish and cephalopods. The trophic level of M. hubbsi ranged from 3.43 to 4.51 according to season and region. Cannibalism increased with predator length and contributed a maximum of 8.14% to the diet of M. hubbsi during winter on the inner Patagonian continental shelf.

Merluccius

10.1017/s0025315414000629

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Citations (27)