Maria Isabel C. Gonçalves- PhD
- Project Manager - Whales From the Hill at Parque Científico e Tecnológico do Sul da Bahia
Maria Isabel C. Gonçalves
- PhD
- Project Manager - Whales From the Hill at Parque Científico e Tecnológico do Sul da Bahia
About
21
Publications
6,221
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
55
Citations
Introduction
Maria Isabel C. Gonçalves currently is a Postdoctoral Researcher at the Applied Ecology & Conservation Lab from State University of Santa Cruz (Brazil) and collaborator of the Laboratory of Bioacoustics in studies on ecology, behavior, and bioacoustics of cetaceans, as Project Manager of Whales from the Hill (Projeto Baleias na Serra).
Current institution
Parque Científico e Tecnológico do Sul da Bahia
Current position
- Project Manager - Whales From the Hill
Additional affiliations
September 2021 - present
Parque Científico e Tecnológico do Sul da Bahia
Position
- Project Manager
July 2018 - June 2021
January 2013 - April 2017
Publications
Publications (21)
Aim
The urgency for remote, reliable and scalable biodiversity monitoring amidst mounting human pressures on ecosystems has sparked worldwide interest in Passive Acoustic Monitoring (PAM), which can track life underwater and on land. However, we lack a unified methodology to report this sampling effort and a comprehensive overview of PAM coverage t...
Ocean warming, acidification, and deoxygenation are expected to intensify without significant climate mitigation. In tropical regions, rising ocean temperatures may push marine species to their thermal limits, leading to redistributions and cascading effects on communities and ecosystems. We evaluate how the future climate change scenarios could im...
After the worldwide moratorium on whaling, humpback whale populations began to recover, reoccupying former areas of use, as also observed on the Brazilian coast. Abrolhos Bank represents the area of greatest humpback whale concentration but the number of individuals to the north has increased, as has happened in the region of Serra Grande. To compa...
Ocean currents, driven by gravity, wind, and water density, disperse marine biota worldwide, often leading species to shorelines alive or as carcasses. These carcasses provide vital information about species’ health conditions and threats within their habitats. Marine animal strandings thus offer crucial insights into the ecological implications of...
Five decades after the first description of the humpback whale song in the Northern Hemisphere, and two decades after the first description of a cultural revolution in the eastern Australian population, this Note provides evidence of an abrupt change (leastways) of the song occurred in 2018 season, in breeding stock A. This intense song change meas...
The Atlantic sector of the Southern Ocean (ASSO) has one of the highest densities of Antarctic krill ( Euphausia superba ) compared to other polar and subpolar regions, which attracts migratory baleen whale species to aggregate in this area for feeding. Humpback whales ( Megaptera novaeangliae ) also sing extensively while on the Southern Ocean fee...
The humpback whales from the breeding stock A are recovering and currently, the whales are observed throughout northeastern Brazil. Since 2014, monitoring studies of humpbacks have begun in Serra Grande, a region where the continental shelf is narrower in the Brazilian coast, allowing the whales to approach near the coast. Land-based visual monitor...
South America hosts two stocks of humpback whales (Megaptera novaeangliae), stock A
occupying southwest waters of the Atlantic, and stock G, located in the Southeast Pacific. After breeding in these locations in the austral winter and spring, both stocks travel in the austral summer to the feeding areas located in the Magellan Strait, Corcovado Gul...
Humpback whales migrate to the Brazilian coast during the austral winter to reproduce and calve. Males sing long complex songs with repetitive patterns, and each population has its own song version that changes over time. The objectives of this study were: 1) to define the song structure in 2014 and 2015 in the Brazilian breeding area; 2) to analyz...
Acoustic communication plays an important role for whales due to the propagation efficiency of sounds over long distances in the marine environment. While humpback whales’ song is emitted only by males mainly during the breeding season, social sounds (calls or sounds produced on the surface of water through aerial behaviors) are produced by both ma...
The population of humpback whales from breeding stock A is increasing, and little is known about the routes used by humpbacks that move north of the main calving area of Brazil, the Abrolhos Bank. The aim of this study was to describe the movements of humpback whales in a reoccupation wintering area (Serra Grande, Bahia state, Brazil) based on land...
Whales are difficult to study. These large marine mammals cannot be maintained in captivity so they have to be studied in nature, and observing their underwater behavior becomes a challenge. The extensive distribution, large size, and aquatic life style of these leviathans constrain efforts to observe and understand the scale of what is being studi...
The coast of Brazil is an important low latitude nursery ground for humpback whales ( Megaptera novaeangliae ). The number of humpback whales in this region has increased and its population is reoccupying areas where it has been depleted during the whaling period. The goal of this study was to conduct land-based observations during 2014 and 2015 to...
Humpback whales use the Brazilian coast to breed and calve. The number of individuals of the population from reproductive stock A has increased in the past few years. Whales are reoccupying areas used before being affected by whaling, lacking detailed information about their presence along the coast. Thereby, the objective of this study was to desc...
Humpback whales (Megaptera novaeangliae) from the reproductive stock A migrates to the Brazilian waters, where there has been verified a population increase. Even though Abrolhos Archipelago represents the area of greatest concentration of humpback whales, the population is now reoccupying areas previously used before being affected by whaling. How...
Humpback whales (Megaptera novaeangliae) migrate from feeding to breeding areas and the coastline orientation seems to be a key factor that influences the course of their movement. Their speed and linearity may be influenced by the area where they are (migratory corridors, feeding or breeding areas). Knowledge of speed along the route is essential...
Humpback whales (Megaptera novaeangliae) migrate to the Brazilian coast during the winter and spring to breed and calve. During this time, the males sing complex songs related to mating. Although most of the studies on acoustic communication of the species are focused on song, humpback whales also use other “social sounds” to communicate. Non-song...
Questions
Question (1)
Hello!
In our research, we are using a Zoom H4n Pro portable recorder for underwater sound recording. We need to take absolute measurements of the sound pressure level and for that we need to know the characteristics of the recording system (like the sensitivity of the transducer and how much gain is added). However, we are struggling with the "rec level" scale of the recorder (that goes from 0 to 100), and how it translates to gain in decibels.
My questions are:
- How to know exactly how much dB gain was set in the input "rec level"?
- at which rec level equals 0 gain and 0 attenuation, would it be at 50 (the intermediate level)?
Thanks for the help,
Isabel
