Pablo Denuncio

Pablo Denuncio
Universidad Nacional de Mar del Plata | UNMDP · Instituto de Investigaciones Marinas y Costeras (IIMyC)

PhD. Biological Sciences

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58
Publications
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April 2014 - present
Universidad Nacional de Mar del Plata
Position
  • PostDoc Position

Publications

Publications (58)
Article
Full-text available
RED LIST ASSESSMENT OF THE MAMMALS OF ARGENTINA 2019: SUMMARY AND ANALYSIS OF THREATS. Assessing the extinction risk of species has become an important decision tool for the implementation of species conservation policies. In this work we summarize the result of the latest oficial categorization of the mammals of Argentina with emphasis on the thre...
Chapter
The collection of stranded animals has been proved to be a reliable tool to evaluate marine megafauna mortality patterns. The aim of this chapter is to describe the temporal and spatial franciscana stranding patterns along its whole distribution, including Brazil, Uruguay, and Argentina. A total of 8,163 franciscanas were recorded from 1961 to 2020...
Chapter
The franciscana, Pontoporia blainvillei, is the only extant species of its family and the most threatened small cetacean in the Western South Atlantic. Understanding life traits that shape the population dynamics and variation in the demography of threatened species is critical for their conservation. In this chapter, we provide a comprehensive rev...
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
Plastic is one of the most commonly found residues in the marine environment, which can cause several impacts. This study evaluated the interaction of marine litter with surf-zone trammel nets in Southern Brazil. Fifty fishing operations were sampled, where 4213 items were captured: 1500 discarded fish, 1384 fragments of marine litter, and 1329 uti...
Article
Marine plastic pollution is projected to increase globally in the next few decades. This holds true for South America where the number of species that interacts with plastics is increasing. In this study, we explore for the first time the potential of certain charismatic species of marine turtles, mammals and seabirds as indicators of plastic pollu...
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
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...
Poster
Full-text available
Los mamíferos marinos habitan casi todos los ecosistemas marinos, su distribución varía de acuerdo a las características físicas, químicas y biológicas de las masas de agua. Los avistajes de mamíferos marinos en aguas abiertas son oportunísticos, y la información al respecto es escasa. El objetivo de este trabajo es presentar los registros de mamíf...
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
Full-text available
La marsopa espinosa es un cetáceo costero robusto y de pequeña talla endémica de Sudamérica, distribuido de forma continua entre el sur de Brasil en el Atlántico hasta el norte de Perú en el Pacífico. En la provincia de Buenos Aires son raros los registros y escasos sus varamientos. El objetivo de este trabajo fue describir por prime-ra vez la diet...
Poster
Full-text available
El objetivo de este trabajo fue describir los hábitos tróficos de ambas especies en la región costera bonaerense, a partir del análisis del contenido gastrointestinal de ejemplares varados.
Article
Although the perils of plastics to living organisms including humans have been neglected for decades, they have recently been recognized as a major environmental problem worldwide. Little progress has been made on understanding the factors that drive species' and populations' susceptibilities to the ingestion of plastic. Here, we propose using nutr...
Article
Full-text available
In the last decades, an increasing fishing effort and a decreasing trend in fish catches have been observed in southern Brazil. Considering that marine mammals and fisheries usually compete for the same resources, it is reasonable to presume that the feeding ecology of these predators is affected by the current scenario. To evaluate this hypothesis...
Article
The franciscana (Pontoporia blainvillei) is the most threatened small cetacean of South America. The species isendemic to coastal waters of the western South Atlantic Ocean, where it is distributed from Itaúnas (Brazil) toGolfo San Matias (Argentina). Its range was divided in four Franciscana Management Areas (FMAs) for con-servation purposes. Howe...
Article
In this paper, we examined the ingestion of marine debris (MD) in South American fur seals (SAFS), Arctocephalus australis, found dead in coastal beaches of northern Argentina and southern Brazil. Seven percent of 133 SAFS analyzed presented marine debris in their stomach (n = 10), with no differences between sampling countries (Brazil n = 7, Argen...
Article
Knowledge of growth patterns of an animal species is fundamental to understand their life history. This information is also used to help define population boundaries of threatened cetaceans, such as the Franciscana dolphin, Pontoporia blainvillei . A total of 108 Franciscana dolphins incidentally captured in artisanal fishing nets in estuarine and...
Conference Paper
Disentangling the intricacies governing prey selection and dietary breadth in wild predators are important for understanding their role in structuring ecological communities and provides critical information for the management and conservation of ecologically threatened species. Here, we combined dietary analysis, nutritional composition analysis o...
Article
Full-text available
The Franciscana dolphin Pontoporia blainvillei is characterized by a long rostrum, a feature that is shared with the families formerly classified as river dolphins (Pontoporiidae, Platanistidae, Iniidae, Lipotidae). Although there are occasional reports on the existence of beak deformations, very little published information exists describing this...
Article
Full-text available
Southern sea lions (Otaria flavescens; SSL) have a polygynous mating system and a prolonged social-sexual maturation period for males. Male haulouts are common in this species, with some very distant from central breeding rookeries, although the functions of these aggregations are not clearly understood. To estimate the potential connectivity betwe...
Poster
Full-text available
El objetivo de este trabajo es presentar los resultados de la revisión de la colección ósea de Mamíferos Marinos perteneciente a la Universidad Nacional de Mar del Plata (UNMdP) La revisión consistió en la cuantificación del material óseo de cetáceos y pinnípedos y su clasificación al menor nivel taxonómico posible. La información complementaria ta...
Article
Full-text available
The present work describes the structure of benthic polychaete association of the southermost part of Samborombón Bay and its relationship with sediment after two decades of the last study made in the same area. Three sampling stations were established: Punta Rasa, Tapera de López and Arroyo San Clemente. Four species of polychaetes were identified...
Article
Full-text available
ABSTRACT. Benthic polychaete association and their relationship with sedimentary parameters at south of Samborombón Bay (Buenos Aires province, Argentina): The present work describes the structure of benthic polychaete association of the southermost part of Samborombón Bay and its relationship with sediment after two decades of the last study made...
Article
Full-text available
The ovaries of 31-franciscana dolphins (19 immature and 12 mature) by-caught in coastal waters of Argentina were examined to describe the reproductive biology. No ovarian polarity was found, both ovaries were functional and showed similar amount of corpora. A positive trend was observed between the number of corpora and age (3–8 yr old), indicating...
Article
Full-text available
The present study provides information about the diet composition of franciscana dolphin, Pontoporia blainvillei, from southern Buenos Aires coast, Argentina. From 2003 to 2011 we collected 66 franciscana dolphins that were incidentally entangled in artisanal fishing nets. We analyzed the stomach contents and estimated the prey size in order to eva...
Article
Full-text available
The franciscana dolphin (Pontoporia blainvillei) is a small coastal dolphin endemic to the Southwestern Atlantic Ocean. Incidental captures in fishing gillnets is possibly the greatest conservation concern for this species and occurs within most of its geographical distribution. The aim of this paper was to determine the biological parameters o...
Article
Full-text available
Metallothioneins are signals of metal exposure and widely used in biomonitoring. Franciscana dolphin is an endemic cetacean from the Southwestern Atlantic Ocean, classified as Vulnerable A3d by the IUCN. Metallothionein, copper and zinc in Franciscana were assessed in two geographic groups; one inhabits La Plata River estuary, anthropogenically imp...
Chapter
Benthic monitoring programs can be used to investigate the relationship between shore birds and their intertidal food supply, and are particularly helpful in areas of rapid habitat fragmentation and deterioration resulting from human disturbance. Samborombon Bay in Buenos Aires Province, Argentina is an area of importance for migratory shorebirds t...
Article
Full-text available
Hair bleaching marking technique in South American sea lions Otaria flavescens: Description and evaluation of method. The aim of this paper is to describe and evaluate the use of the hair discoloration method in South American sea lions, with an emphasis on its advantages and its potential use in future studies. For marking, stamp removable letters...
Article
Full-text available
Beach debris, defined as solid waste materials of anthropogenic origin discarded at sea or reaching the sea through other ways, is one of the most highly visible expressions of human impact on the marine environment.
Article
Full-text available
Tesis de doctorado (208 pp.) en Ciencias, Área Biología, defendida el 18 de diciembre de 2012 por Pablo Denuncio <pablodenun@gmail.com>. Lugar: Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Argentina. Director: Diego Rodríguez. Miembros del tribunal: Humberto L. Cappozzo, Juan M. Diaz de Astarloa y Diego Verzi.
Data
Full-text available
Birth, lactation, and maternal investment have been described and measured in many species of terrestrial and marine mammals that nurse their young on land such as pinnipeds, aquatic mustelids, and polar bears (Siniff & Ralls, 1991; Derocher & Stirling, 1995; Trillmich & Weissing, 2006). Because of their fully aquatic life cycle, information about...
Article
Full-text available
The aim of this paper is to describe and evaluate the use of the hair discoloration method in South American sea lions, with an emphasis on its advantages and its potential use in future studies. For marking, stamp removable letters and numbers were used, connected to an extensible rod. The bleached marks obtained had a maximum duration of 347 days...
Article
Full-text available
In Argentina, the franciscana dolphin is one of the most vulnerable cetaceans regularly entangled in coastal artisanal fishery nets. The aim of this paper is to estimate the species' incidental mortality on the Southern coast of Buenos Aires province through interviews with the captains of artisanal fishing vessels, in the period 2006-2009. Francis...
Article
Full-text available
resuMen A partir del análisis de 73 cráneos de Arctocephalus australis se deter-minó el patrón y orden de cierre de 12 suturas craneanas utilizando cuatro estadios de cierre sutural (1: sutura abierta, 2: sutura menos del 50 % cerrada, 3: sutura más del 50 % cerrada y 4: sutura cerra-da). Las suturas presentaron patrones de cierre diferentes según...
Conference Paper
Full-text available
Especialistas em Mamíferos Aquáticos da América do Sul (RT) 8º Congresso da Sociedade Latinoamericana de Especialistas em Mamíferos Aquáticos (SOLAMAC) Florianópolis (SC), 24 a 28 de outubro de 2010 Sociedade Latinoamericana de Especialistas em Mamíferos Aquáticos – SOLAMAC Several factors make the identification of stranded rorquals (Cetacea: Bala...
Article
Full-text available
Aerial surveys are considered the most effective way of estimating abundance of franciscanas (Pontoporia blainvillei). However, estimates obtained with data collected from aircrafts are often underestimated because of visibility bias or bias in estimating group sizes from a fast-moving platform. Independent boat and aerial surveys were concurrently...

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Projects

Projects (3)
Project
- Ecología trófica [Feeding ecology] - Composición nutricional de las presas [Proximate composition of prey] -Calidad nutricional de las presas [Prey quality] - Ecología nutricional [Nutritional ecology]
Project
La presente propuesta tiene como objetivo general determinar las estrategias y eficiencia de forrajeo en juveniles de Otaria flavescens en distintas áreas del Estuario del Río de la Plata (ERP). Como hipótesis de trabajo se plantea que los juveniles del Lobo Marino de un Pelo presentan estrategias de forrajeo diferentes que los adultos, explotando áreas que les impongan menores restricciones fisiológicas para el buceo bentónico y para el desplazamiento desde sus colonias de descanso. En especies de lobos marinos de un pelo que presentan, al igual que Otaria, tendencias poblacionales decrecientes, se ha establecido que la fracción juvenil de las poblaciones se constituye en un elemento clave que contribuiría al marcado descenso numérico, debido principalmente al estrés nutricional producido por la falta de experiencia en la obtención del alimento, las limitantes fisiológicas al buceo bentónico y las altas demandas energéticas del período de crecimiento y madurez. Así, la mortalidad juvenil se ha establecido como el principal freno a la recuperación poblacional, de manera que teniendo en cuenta la vulnerable situación poblacional en la que se encuentra el lobo marino de un pelo en el ERP, la escasez de estudios sobre la fracción juvenil de los stocks de esta especie y la importancia que las estrategias de obtención de alimento tienen en las etapas tempranas de desarrollo, se plantearon como objetivos particulares: a) Establecer las áreas de de forrajeo de juveniles de Otaria, definiendo los rangos de movimientos y las áreas de mayor utilización. b) Comparar las estrategias de forrajeo entre juveniles y adultos, principalmente a lo que hace a la duración de viajes de forrajeo, área barrida, intensidad de uso y fidelidad a las áreas de descanso. Para cumplir con los objetivos planteados se ha diseñado un estudio basado en la colocación de telémetros satelitales de posicionamiento en ejemplares juveniles de lobos marinos de un pelo, los cuales, proveen información muy precisa sobre la localización de los animales en mar abierto, permitiendo analizar la localización y duración de los viajes de forrajeo, distancia recorrida, direccionalidad de los movimientos, velocidad de desplazamiento, área cubierta y profundidad media del área. Los resultados obtenidos serán analizados en entornos de Sistemas de Información Geográfica, que serán de aplicación en herramientas de gestión y conservación de esta especie.