Gisela Giardino

Gisela Giardino
National Scientific and Technical Research Council | conicet · CCT Mar del plata

Dr. Biological Sciences.
Researcher at UNMdP- CONICET and Marine Mammals and biostatistics teacher for Mar del Plata University

About

54
Publications
7,916
Reads
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323
Citations
Introduction
Dr. Biological Sciences with twenty years of research and field experience on Marine Mammals, including capture-resighting techniques, population dynamics, social analysis, bioacoustics and on board sighting. Currently Researcher Assistant at UNMdP- CONICET working with Marine Mammals passive acoustic and teacher of Marine Mammals and biostatistics
Additional affiliations
November 2019 - present
National Scientific and Technical Research Council
Position
  • Research Assistant
Description
  • Marine Mammals pasive acustic in Argentina
March 2019 - September 2019
Italian National Research Council
Position
  • Researcher
Description
  • Learning and working with marine bioacoustic
January 2017 - present
Universidad Nacional de Mar del Plata
Position
  • Jefa de Trabajos Practicos (JTP)
Description
  • Teacher of "Marine Mammals" for the last year of Biological Science student of Universidad Nacional de Mar del Plata and "Biostatistics" for the 2nd year.
Education
April 2008 - July 2014
Universidad Nacional de Mar del Plata
Field of study
  • Marine Biology
April 1997 - October 2006
Universidad Nacional de Mar del Plata
Field of study
  • Marine Biology (“Population structure and dynamics of Southern sea lion colonies of Quequen´s harbor, Argentina”)

Publications

Publications (54)
Poster
Full-text available
Franciscana dolphin (Pontoporia blainvillei) is the most affected dolphin species in the Southwestern Atlantic Ocean. It is classified as Vulnerable A3D by IUCN and SAREM (national level) and only in northern coast of Argentina (Buenos Aires Province) around 400 dolphins are entangled every year in coastal gillnets. However, until now little is kno...
Conference Paper
The biggest conservation problem that Franciscana dolphin (Pontoporia blainvillei) are facing nowadays is bycatch. In Argentina has been classified as Vulnerable (SAREM), under the IUCN criteria, and only in northern coast (Buenos Aires Province) around 400 dolphins entangled every year in coastal gillnets. The reason why this dolphin is entangled...
Conference Paper
Our main interest is to detect the acoustic presence of franciscana dolphins in an area free of fishing pressure and then compare it with the detections made in areas with active bycatch. To meet that objective, two acoustic detectors (FPODS) were first placed in Chapadmalal (Free fishing zone) and then in two artisanal fishing gillnets in Claromec...
Article
This work aims to provide information regarding the behavioral ecology of the least studied of the two sheathbill species, the Snowy Sheathbill (Chionis albus), wintering in northern Argentina in a male South American Sea Lion (Otaria flavescens) haul-out. Data about bird abundances and time allocated to behaviors was gathered during the final stag...
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
The mammalian heart has been described as a highly evolutionarily conserved structure and the cardiovascular system allometry has been fully studied among many mammalian species, but few of these studies have been focused on marine mammals. Previously reported electrocardiogram (ECG) of anesthetized Southern sea lions (SSL; n = 13) and South Americ...
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...
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
In South-western Atlantic waters, individuals of the southern right whale (SRW) Eubalaena australis spend part of the year (the austral winter and spring) in northern inshore waters where they breed and then migrate to southern feeding grounds during the summer. Mar del Plata (MDP) is located between two main reproductive areas (Península Valdés-Ar...
Article
Full-text available
In Southwestern Atlantic waters, individuals of the southern right whale (SRW) Eubalaena australis spend part of the year (the austral winter and spring) in northern inshore waters where they breed and then migrate to southern feeding grounds during the summer. Mar del Plata (MDP) is located between two main reproductive areas (Península Valdés-Arg...
Poster
Communication in Porpoises (Cetacea: Phocoenidae) has been little studied. They usually produce narrow band high frequency clicks for echolocation, which have likely evolved to take advantage of a window of low ambient noise, and/or of the reduced hearing sensitivity of killer whales at these high frequencies (100+ kHz). Evidences for clicks emitte...
Conference Paper
Full-text available
Bottlenose dolphins produce varied types of sound, including clicks, whistles, and bursts. We know that dolphins in nature have more click production at night during feeding activities and a peak occur at crepuscular/dawn hours, but dolphins in captivity are involved in several training/feeding sessions per day that are diurnal. To better understan...
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...
Conference Paper
Full-text available
In Southwestern Atlantic waters, individuals of the Southern Right Whale (SRW) Eubalaena australis travel each year from their southern summer feeding grounds to their northern calving areas: Península Valdés (PV-Argentina) and Santa Catarina (SC-Brazil). The coast of Mar del Plata (MDP) is located between these two main reproductive areas. The pur...
Conference Paper
Full-text available
Signature whistles are stereotyped and individually distinctive acoustic signals used as individual recognition calls, for maintaining group cohesion and during stressful situations. Here, it’s proved the occurrence of stereotyped whistles and how it changes, by an isolated adult female of short-beaked common dolphin (Delphinus delphis) kept in reh...
Poster
ABSTRACT Signature whistles are stereotyped and individually distinctive acoustic signals used as individual recognition calls, for maintaining group cohesion and during stressful situations. Here, it’s proved the occurrence of signature whistles and how it change, by an isolated adult female of short-beaked common dolphin (Delphinus delphis) kept...
Article
In this study, we evaluate the relationship between the abundance of seabirds and the different phases of a seismic operation aimed at locating offshore oil fields and taking place in the high seas east of Tierra del Fuego in the southwest Atlantic Ocean. The composition of the bird assemblages and their abundances per species were recorded by mean...
Article
Full-text available
ABSTRACT Signature whistles are stereotyped and individually distinctive acoustic signals used as individual recognition calls, for maintaining group cohesion and during stressful situations. Here, it’s proved the occurrence of stereotyped whistles and how it changes, by an isolated adult female of short-beaked common dolphin (Delphinus delphis) ke...
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
An understanding of the population dynamics and social organization of cetaceans is essential to manage the influence of anthropogenic activities. In this study, the population size, site fidelity and social interactions of bottlenose dolphins in the Strait of Sicily (Italy) were investigated to provide recommendations for their conservation. Mark-...
Article
Full-text available
Knowledge of the real size of any wild population is an essential tool to take management and conservation measures and even more so when the population studied may have potential conflicts with humans. Because of this, the objective of this study was to estimate the population size of two South American sea lion male haul-outs using mark-resightin...
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...
Research
Full-text available
Nota de divulgación en la revista del (C.A.S.E.). Con mitivo de la semana del mar. Páginas 31 y 32. Octubre de 2012.
Article
Full-text available
This article presents the results of a summer survey of marine mammal occurrence at the BrazilMalvinas Confluence in the Argentine Sea shelf break. A total of 61 marine mammal sightings were recorded. The most frequent species recorded were South American fur seals (Arctocephalus australis; 75.4%; 78-4670m),followed by sperm whales (Physeter macroc...
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
Larvae of the genus Pseudoterranova constitute a risk for human health when ingested through raw or undercooked fish. They can provoke pseudoterranovosis in humans, a fish-borne zoonotic disease whose pathogenicity varies with the species involved, making their correct specific identification a necessary step in the knowledge of this zoonosis. Larv...
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...
Conference Paper
Full-text available
Permanent non-breeding Southern sea lion (Otaria flavescens) male rookeries are found in Mar del Plata (38º 02’ S, 57º 31’ W) and Quequén (38º 35’ S, 58º 42’ W) harbors in northern Argentina. These rookeries are located in an intermediate area between two main breeding sites (Uruguay and Patagonia) with a gap of 1,000 kilometers, and a significant...
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...

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Cited By

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
The proposed CAIMAR JL is conceived as a room where Argentinean and Italian can cooperate in the fields of marine and maritime sciences, providing their own instruments, ideas, competences, experiences, etc. The European "ERAnet" is the concept our proposal is inspired to: a unified area open to the world, in which scientific knowledge, technology and researchers circulate and freely meet. Consequently, our proposal can be considered as Italo-Argentinian ERAnet on Marine and Maritime Science & Technology. The macro objective of this proposal is to reinforce the Italian-Argentinean cooperation with the aim of: 1) Improving the knowledge of Argentinean seas and oceans and further seas (Mediterranean Sea, polar areas, etc.) in order to carry out multi-disciplinarycomparative studies for understanding the functioning of marine eco-systems within selected areas; 2) Enhancing current scientific debate and further research on Blue Growth issues and their potential for bilateral cooperation. These issues can trigger growth and competitiveness both in Italy and Argentine and comprise Integrated Coastal Zone Management, ocean energy, blue biotech, Marine Spatial Planning, underwater cultural heritage, etc. 3) Boosting cooperation not only in Research, but also on Training and Dissemination within the areas of Marine Sciences and Technologies (e.g. eco-friendly vessels, fisheries, etc.);
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.