Banca de DEFESA: ÍSIS VIVIANE BEZERRA DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ÍSIS VIVIANE BEZERRA DA SILVA
DATE: 03/05/2024
TIME: 09:00
LOCAL: virtual
TITLE:

HABITAT USE OF THE GUIANA DOLPHIN, SOTALIA GUIANENSIS, IN PART OF RIO GRANDE DO NORTE AND PARAÍBA

KEY WORDS:

cetaceans, behavioral ecology, conservation, marking and recapture, photoidentification, marine mammals, dolphin cathalog, photoidentification, marine mammals.

PAGES: 112
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Comportamento Animal
SUMMARY:

Anthropic actions took their toll on cetacean populations, especially on coastal areas. Thousands die every year due to bycatch and/or intentional capture. Combined with that are habitat degradation, aquatic pollution, and the increase in vessel traffic. Those circumstances can change individuals; behavior, culminating in alterations of habitat use and species distribution. The gathering of basic demographic information is important to identify these changes and for conservation and species management of marine species, such as Sotalia guianensis, the most common delphinid in Brazil, of which little is known in the northeast part of the country. By generating catalogs based on the data gathered on field, is possible to identify individuals and their distribution along the time and space, allowing long-term studies, using natural dorsal fin marks to identify Sotalia guianensis (guiana dolphin) individuals. The urgency in comprehending the behavioral ecology of this cetacean comes from the fact that it’s a coastal species, has a low reproductive rate (as do all cetaceans) and vulnerable to extinction. Besides that, its conservation is important for the ecosystem, since the top predator guiana Dolphin, regulates the trophic web of its environment. Data gathered in the present study, to create a catalog, that intends to uphold the maximum of data available, feeding the database Flukebook, allows the analyses of these data over time and across long extensions of coastal territory that contains beaches and protected bay in the areas of The
Lagoa de Guaraíras, Pipa, Baía Formosa, Barra de Mamanguape, and the Sistema Estuarino do Rio Paraíba (SERP). Databases like the one generated in this study, allows to calculate the tendency of abundance indexes, offer indications of the population health through the time, plus allowing to identify hunting areas (the distribution of cetaceans is extremely co-related with its pray), reproduction sites, nursery areas (plenty of females accompanied by calves), areas that would be of main concern for species conservation. Being the guiana dolphin a top predator (regulating the local trophic web), a coastal species, with low reproductive rates and vulnerability to extinction, there is an urgency to understand the behavioral ecology of the species. The evaluation of these biological parameters is considered a priority for the species, locally and globally. The level of site fidelity and the residency levels are also aditional parameters that can be obtained on databases like this one that help to determine priority areas for conservation and species management and are essential for coastal environmental planning.

COMMITTEE MEMBERS:
Interna - 2696495 - RENATA GONCALVES FERREIRA
Interna - 1863735 - RENATA SANTORO DE SOUSA LIMA
Externa à Instituição - DIANA GONCALVES LUNARDI - UFERSA