Joaquín Carlos Mario Gana

Joaquín Carlos Mario Gana
Universidad Nacional de Mar del Plata | UNMDP · Instituto de Investigaciones Marinas y Costeras (IIMyC)

Bachelor of Science
Metabolism of Magellanic Penguins. Marine mammals

About

15
Publications
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Citations
Introduction

Publications

Publications (15)
Article
Groups of male South American sea lions (Otaria flavescens; SSLs) congregate in harbours on the northern coast of Argentina. These groups are very dynamic, with a high degree of habituation to human activities and the ability to colonise different types of artificial substrates, making them an interesting subject for understanding individual associ...
Article
Niche segregation has been recognized as a valuable mechanism for sympatric species to reduce interspecific competition and facilitate coexistence. The differential use of habitats is one of the behavioural mechanisms that may shape coexistence among marine predators. In this study, we provide a dietary and nutritional assessment of two pinnipeds,...
Conference Paper
Full-text available
La ballena jorobada solía tener una presencia esporádica a lo largo de la costa de la Provincia de Buenos Aires (PBA), Argentina. A partir del año 2018 los avistamientos y varamientos han aumentado notablemente. El objetivo del presente trabajo es realizar una recopilación de los registros de ballena jorobada en la PBA, identificando: tendencias, e...
Article
Full-text available
In this paper, we analyze the occurrence, abundance, and type of plastic debris (PD) present on the digestive tracts of 65 white croakers (Micropogonias furnieri) catches from Rio de la Plata Estuary System (RLPES). Eighty percent of individuals analyzed had ingested PD, of which 156 were thread-like plastics (FO = 83.9 %) and 30 were fragments (FO...
Chapter
Understanding the role of marine mammals in marine ecosystems provides a context to assess the potential effect of depredation on their prey populations and the structure of communities. Moreover, it helps to figure out the impacts that prey populations suffer from fisheries and other anthropic activities. This understanding can help to foster a ra...
Chapter
Male-only hauling grounds occur in close association to breeding colonies in several otariids. The occasional use of human-built infrastructure by these groups is also common. We observed permanent male aggregations of southern sea lions, Otaria flavescens, in urban contexts, such as two of the main fishing harbors in Argentina and investigated how...
Article
Full-text available
Adult Anisakis Dujardin, 1845 were found in two specimens of killer whale Orcinus orca and one specimen of franciscana Pontoporia blainvillei stranded from off the coast of Buenos Aires Province, Argentina. Genetic identification of the nematodes (N = 144) was performed by sequence analysis of the mitochondrial (mtDNA cox2) and the nuclear (nas 10...
Conference Paper
Full-text available
La colección biológica del Grupo de Investigación “Biología, Ecología y Conservación de Mamíferos Marinos” del Instituto de Investigaciones Marinas y Costeras (IIMyC, UNMdP- CONICET, Argentina), reúne material óseo, diversos órganos, datos biométricos y fotográficos de mamíferos marinos colectados principalmente en la costa de la provincia de Bueno...
Poster
El Pingüino de Magallanes (Spheniscus magellanicus) es una de las aves marinas más abundantes de nuestro país y la más numerosa del género Spheniscus. La Tasa Metabólica de Reposo (TMR) se estima que representa el 25%-30% del gasto diario energético de las aves. No hay estudios detallados en esta especie, como si lo hay en otros miembros de la fami...
Poster
Full-text available
La Foca Leopardo (Hydrurga leptonyx) es una especie de pinnípedo antártico, con presencia ocasional en las costas argentinas, cuya histología está escasamente descripta, particularmente del corazón. El objetivo es presentar resultados preliminares del análisis histológico e histomorfométrico de corazón en dicha especie. Se tomaron muestras (n=9) de...
Poster
Full-text available
Existe limitada bibliografía sobre descripciones histológicas, en particular del corazón, de la Foca Leopardo (Hydrurga leptonyx), pinnípedo característico del continente Antártico. Esto se debe en gran parte a la dificultad de recolectar muestras de esta especie. El estudio de los componentes tisulares del corazón es importante para conocer adapta...
Poster
El lobo marino de un pelo (Otaria flavescens) es el pinnípedo más común de la costa Argentina y el único sudamericano que forma colonias portuarias estables, como las observadas en Necochea y Mar del Plata. En estas colonias no reproductivas, de machos, los animales alternan períodos de permanencia en tierra y en mar abierto con duraciones aproxima...

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Cited By

Projects

Projects (3)
Project
We specialize in studying the responses of organisms to changes in their environment, both natural and those caused by the development of human activities. We analyze various aspects of the physiology and behavior of organisms. The physiological parameters help us to determine both their physical condition and health status through hematological, biochemical, immunological, hormonal, and incidence of pathogens