Marta Jussara Cremer

Universidade da Região de Joinville · Department of Biological Sciences

1. While cetaceans are known to produce large and complex acoustic repertoires, the challenges of exhaustively sampling sounds at sea and counting relevant signals has precluded an understanding of their true repertoire diversity. 2. Here we quantify and compare the whistle repertoires of 16 populations in the genus Sotalia, belonging to two sister...

Aerial photogrammetry protocols using drones have proved efficient in monitoring free‐living cetaceans. In this work an aerial photogrammetry protocol using a drone was applied to estimate morphometric measurements and body condition variation in two endangered cetacean species, franciscanas (Pontoporia blainvillei, n = 122) and Guiana dolphin (Sot...

Franciscana dolphins in Babitonga Bay represent the only fully estuarine population of this critically endangered species, but this location is also home to a population of Guiana dolphins. Surrounded by large cities and harbors, Babitonga Bay presents intense human activities and potential impacts that may threaten the dolphins. Understanding thei...

The franciscana (Pontoporia blainvillei) is a small cetacean endemic to the South Atlantic distributed in coastal waters from Espírito Santo State in Brazil to Chubut Province in Argentina. Babitonga Bay, on the northern coast of Santa Catarina State, Brazil, is home to the only known franciscana population that resides throughout the year in an es...

Populations usually considered foraging generalists may include specialized individuals that feed on a restricted subset of the prey spectrum consumed by the population. By analyzing the time series of δ¹³C and δ¹⁵N values in sequential growth layer groups within tooth dentin, we measured population- and individual-level variation in resource use o...

Cetacean morbillivirus (CeMV) causes illness and death in cetaceans worldwide; the CeMV strains circulating in the Southern Hemisphere are poorly known. We detected a pilot whale CeMV strain in 3 short-finned pilot whales (Globicephala macrorhynchus) stranded in Brazil during July-October 2020. Our results confirm this virus circulates in this spec...

Franciscana dolphins in Babitonga Bay represent the only population of that critically endangered species which is confined to an estuary. Surrounded by large cities and harbors, that environment presents intense human activities and potential impacts that may threaten the dolphins. Understanding their habitat use and distribution can inform mitiga...

Pontoporia blainvillei (Gervais & d’Orbigny, 1844), the franciscana dolphin, is the most endangered small cetacean in the Western South Atlantic. It is an endemic species with a coastal and estuarine distribution that has been divided into four Franciscana Management Areas (FMAs). We used the mitochondrial DNA control region to conduct a phylogeogr...

The franciscana (Pontoporia blainvillei) is the most endangered dolphin in the western South Atlantic Ocean due to bycatch. Our goal was to test the efficiency of a likely "seal safe" pinger (Banana Pinger, Fishtek Marine Ltd.) to ward off fran-ciscanas, as well as investigating possible side effects of habit-uation and habitat exclusion. We deploy...

Environmental and ecological factors can trigger changes in the acoustic repertoire of cetaceans. This study documents the first use of a well-established passive acoustic monitoring device (C-POD) to analyze echolocation sounds and behavior of franciscana dolphins in different habitats: estuary [Babitonga Bay (BB)] and open sea [Itapirubá Beach (I...

The franciscana is endemic to subtropical coastal waters of Brazil, Uruguay, and Argentina, and is the only living species of the family Pontoporiidae. It is regarded as the most endangered cetacean in the western South Atlantic. Five management units are recognized (Franciscana Management Areas, FMAs – sensu Secchi et al., 2003a), with abundance e...

Acoustic monitoring in cetacean studies is an effective but expensive approach. This is partly because of the high sampling rate required by acoustic devices when recording high-frequency echolocation clicks. However, the proportion of echolocation clicks recorded at different frequencies is unknown for many species, including bottlenose dolphins....

In 2014, a Resolution was approved by the IWC for establishing new, specific Terms of Reference to consolidate the Scientific Committee’s mandate on small cetaceans within its broader working program. This program opens the possibility of periodic reviews about the current knowledge and threats, as well as the possibility to implement Conservation...

The franciscana (Pontoporia blainvillei) is the most threatened small cetacean in the South Atlantic. In this study we report the development of 13 microsatellite markers for franciscanas through next-generation sequencing, and the characterization of those loci in 38 samples from the species’ northernmost population (Espírito Santo, Brazil). Besid...

A previous investigation of our research team has demonstrated the suitability of using hepatic total tin (ΣSn) concentrations for evaluating dolphin exposure to organotins (OTs). The present study develops the previous technique into three different approaches that comprise data: (1) on hepatic ΣSn concentrations of 121 Guiana dolphins (Sotalia gu...

Sea turtles are globally threatened due to short-and long-term exposure to anthropogenic activities. Many life-history traits make it difficult to study these species in the wild. Stranding events provide invaluable data to infer key aspects of sea turtle ecology, such as regional occurrence , health status, mortality rates, and potential threats....

The presence of pyrethroid compounds in hepatic tissue of Guiana dolphins (Sotalia guianensis) is reported for the first time. Twelve pyrethroids were determined in 50 animals from eight locations of the Brazilian coast. The highest average concentration of total pyrethroids (∑PYR) was 1166 ng.g⁻¹ lw, with values ranging from 148 to 5918 ng.g⁻¹ lw,...

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...

Estimation of visibility bias is critical to accurately compute abundance of wild populations. The franciscana, Pontoporia blainvillei, is considered the most threatened small cetacean in the southwestern Atlantic Ocean. Aerial surveys are considered the most effective method to estimate abundance of this species, but many existing estimates have b...

This is the Strategic Document for the Brazilian Future Ocean Panel - PainelMar, an initiative that aims to " Perform as a multi-sectorial collaborative platform of individuals and organizations on the interface of knowledge and decision-making processes, aiming at qualifying policies for the sustainable use and health of the oceans" -illuminating,...

Teeth and otoliths are metabolically inert structures that preserve a chronology of chemical variations that may be related to the environmental histories experienced by each organism. Because of the natural decrease of barium and increase of strontium bioavailability in water with increasing salinity, these elements may be especially useful to tra...

Calculation of echolocation signals emission rate is necessary to estimate how many individuals are vocalizing, especially if passive acoustic density estimation methods are to be implemented. We calculated the individual emission rate of echolocation signals of franciscana dolphin. Fieldwork was between 22 and 31 January of 2014 at Babitonga Bay,...

http://dx.doi.org/10.5007/2175-7925.2014v27n3p109 Este estudo teve por objetivo caracterizar o ninhal do rio Pedreira e estimar o sucesso reprodutivo das espécies do local. O local de estudo compreendeu o manguezal da desembocadura do rio Pedreira, localizado ao lado do porto de São Francisco do Sul. As amostragens foram realizadas semanalmente du...

On October 2011, a newborn franciscana dolphin with an anomalously coloration was sighted in Babitonga Bay, southern Brazil. The calf was totally white. Besides the potential mother and newborn, the group also had the presence of another adult, who always was swimming behind the pair. Both adults had the typical coloration of the species, with the...

http://dx.doi.org/10.5007/2175-7925.2014v27n2p117 As aves aquáticas costumam reproduzir de modo agregado, formando grandes colônias reprodutivas com diferentes espécies. Este estudo descreve aspectos biológicos das aves aquáticas de uma colônia na ilha do Maracujá, no estuário da baía da Babitonga, litoral norte de Santa Catarina. Foram coletados...

Site fidelity is the tendency of individuals to return to the same area repeatedly or to remain in a certain area for an extended period of time. Site fidelity has been documented in a number of species, including Sotalia guianensis. The aim of this study was to describe and estimate the range size of S. guianensis individuals and to determine its...

Franciscanas are the most endangered dolphins in the Southwestern Atlantic. Due to their coastal and estuarine habits, franciscanas suffer from extensive fisheries bycatch, as well as from habitat loss and degradation. Four Franciscana Management Areas (FMA), proposed based on biology, demography, morphology and genetic data, were incorporated into...

Diversity and abundance of birds in two tidal flat in Babitonga Bay estuary, north of Santa Catarina state, Brazil. Information of birds in estuaries of Santa Catarina is scarce. This work aimed to collect data on diversity, abundance and seasonal variation on this community. Sampling of birds in two tidal flats in Babitonga Bay estuary was carried...

Franciscana, Pontoporia blainvillei, is the most threatened small cetacean in the South Atlantic. Accidental captures in fishing nets is the main problem for this species throughout its distribution. Dead franciscanas found along the coast are an important source of information. This work aimed to analyze the records of dead franciscanas found on t...

Most current bioexposure assessments for UV filters focus on contaminants concentrations in fish from river and lake. To date there is not information available on the occurrence of UV filters in marine mammals. This is the first study to investigate the presence of sunscreen agents in tissue liver of Franciscana dolphin (Pontoporia blainvillei), a...

Samples from individuals of the populations of Sotalia guianensis (Guiana) and Pontoporia blainvillei (Franciscana) dolphins living in the Babitonga Bay estuary (26° 28′ S/48° 50′ W), and samples from individuals of a second population of P. blainvillei from a nearshore area (26° 38′ S/48° 41′ W), were collected and analyzed along with their prey b...

Pontoporia blainvillei (Gervais and d'Orbigny, 1844) is an endangered small cetacean endemic to South America with four Franciscana Management Areas (FMA) recognized as different population stocks. The role of the intestinal parasite Synthesium pontoporiae (Digenea: Brachycladiidae) as a possible biological marker to differentiate P. blainvillei st...

Most current bioexposure assessments for UV filters focus on contaminants concentrations in fish from river and lake. To date there is not information available on the occurrence of UV filters in marine mammals. This is the first study to investigate the presence of sunscreen agents in tissue liver of Franciscana dolphin (Pontoporia blainvillei), a...

Information of birds in estuaries of Santa Catarina is scarce. This work aimed to collect data on diversity, abundance and seasonal variation on this community. Sampling of birds in two tidal flats in Babitonga Bay estuary was carried out during one year (May 2006 to April 2007). A total of 25 species were identified, being 15 in Linguado (LG) and...

Concentrations of Dechlorane (Dec) 603 (0.75 ng/g lipid weight (lw); mean) and Dec 602 (0.38 ng/g lw; mean) were quantified in more than 95% of the franciscana (Pontoporia blainvillei) dolphin samples, whereas the frequency of detection decreased to 75% for Dechlorane Plus (DP) (1.53 ng/g lw, mean). The presence of Chlordene Plus (CP) was also obse...

The occupation pattern of Sotalia guianensis in São Francisco do Sul harbor inlet, in Babitonga bay, Southern Brazil, was studied between September 1996 and June 1998. A total of 200 h of naturalistic observations and 141.2h of estuarine dolphin systematic observations were made using binoculars 7 x 50. At each three minutes interval, data about nu...

Distribution and status of the Guiana dolphin Sotalia guianensis (Cetacea, Delphinidae) population in Babitonga Bay, southern Brazil. Zoological Studies 50(3): 327-337. The Guiana dolphin Sotalia guianensis is one of the most endangered small cetaceans in the southern Atlantic Ocean. The population abundance and density of this species were estimat...

This report presents the discussions of the group tasked with covering Major Threats and Conservation at the ‘Workshop on Research and Conservation of the genus Sotalia’ held in Armação dos Búzios, Rio de Janeiro, Brazil, 19-23 June 2006. It is intended as a compilation of information supplied by workshop participants and from a literature review....

Dolphins of the genus Sotalia (Delphinidae) occur along the Atlantic and Caribbean coasts of South and Central America and in the Amazon and Orinoco River basins (Flores and Da Silva, 2009; da Silva et al., 2010 this volume; Gómez-Salazar et al., 2010 this volume). The genus has been divided into two species based on skull morphology (Monteiro Filh...

Photo-identification and video-identification techniques were applied to study the residence of Sotalia guianensis in the Babitonga Bay, north coast of Santa Catarina State. From November 2000 to February 2003 a photo-identification effort was conducted trough 21 months, with additional video-identification conducted from August 2003 to August 2004...

Red list of fauna of Santa Catarina, Brazil

Information about cetaceans in offshore Brazilian waters is scarce, and oil-rigs could provide an important opportunity to obtain new data. The present work was conducted on the P-XIV oil-rig (Petrobrás) (26o46’02.2”S; 46o47’02.15”W), located on the border of the continental slope, in an area of 200m depth. In the period between July 2000 and Augus...

The occupation pattern of Sotalia guianensis in São Francisco do Sul harbor inlet, in Babitonga bay, southern Brazil, was studied between September 1996 and June 1998. A total of 200 h of naturalistic observation s and 141.2 h of estuarine dolphin systematic observations were made using binoculars 7 x 50. At each three minute s interval, data about...

There is some evidence that the presence of Tursiopstruncatus in fishing areas represents a real economic threat to fishermen due the dolphin feeding on the entangled fish, damaging the nets and reducing the fish catch. We have carried out experiments to assess the efficiency of a pinger in decreasing the interaction between the dolphins and fishin...

Pontoporia blainvillei (Gervais & d'Orbigny, 1844) is threatened throughout its distribution. The species can be found year-round in the Babitonga bay estuary (26º 02'-26º 28'S and 48º28'-48º50'W), in the north coast of the state of Santa Catarina, Brazil. Boat surveys were conducted in order to evaluate its abundance and density between 2000 and 2...

Orientador : Paulo César de Azevedo Simões-Lopes Tese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Biológicas, Programa de Pós-Graduação em Zoologia. Defesa: Curitiba, 2007 Inclui bibliografia e anexos Area de concentração: Zoologia

The present paper constitutes the second record of epimeletic behavior for the toninha, Pontoporia blainvillei. A toninha calf carcass was recovered at Enseada Beach, São Francisco do Sul, southern Brazil (26o13’S - 48o31’W) on October 9, 2001. Its total length indicated that it was a neonate or a premature calf. The calf had many parallel scratche...

This paper describes artisanal fisheries in Babitonga Bay, northern coast of Santa Catarina State, Brazil. Types of fisheries, practices of resouree exploration, characteristics of gear and transformations in the fisheries system are described. This research was strangly based on the local ecological knowledge of fishermen, obtaining data from inte...

This work analyses, from an ethnoecological perspective, traditional knowledge about the ecology of the dolphin species of Babitonga bay, Pontoporia blainvillei and Sotalia guianensis, and their incidentalkilling by the local artisanal fishery. Set gillnetting is the most dangerous practice to dolphins. On the other hand, the traditional interactio...

The toninha, or franciscana, Pontoporia blainvillei (Gervais & D'Orbigny, 1844), is an endemic species of cetacean of the southwestern Atlantic Ocean. There is little information on the occurrence of this species in its natural environment due to the great difficulty in sighting it. Systematized and non-systematized observations of franciscanas wer...

In the period comprised between August/1996 and November/1998 studies on ecology and behaviour of Sotalia guianensis were carried out in the Babitonga Bay estuary, in the South region of Brazil. Groups of dolphins were followed by boat in the Babitonga Bay and observed from a still point in the harbour inlet in order to get behaviour sampling. Ther...

Distribution Boundaries The known boundaries for the distribution of franciscana range from Itaúnas (18 o 25’S, Espírito Santo State, Brazil) in the north (Siciliano, 1994), to the Golfo Nuevo (42 o 35’S, Chubut Province, Argentina) in the south (Crespo et al., 1998). There is no concrete evidence that the species exists outside these boundaries. H...

The toninha, or franciscana, Pontoporia blainvillei (Gervais & D'Orbigny, 1844), is an endemic species of cetacean of the southwestern Atlantic Ocean. There is little information on the occurrence of this species in its natural environment due to the great difficulty in sighting it. Systematized and non-systematized observations of franciscanas wer...

Pontoporia blainvillei (Gervais & d'Orbigny, 1844) is threatened throughout its distribution. The species can be found year-round in the Babitonga bay estuary (26º 02'-26º 28'S and 48º28'-48º50'W), in the north coast of the state of Santa Catarina, Brazil. Boat surveys were conducted in order to evaluate its abun- dance and density between 2000 and...

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...

RESUMO Durante o período de julho de 2010 a maio de 2011 foi realizado o monitoramento da avifauna associada às lagoas da estação de tratamento de esgoto (ETE) Jarivatuba, no município de Joinville. O local fica as margens do estuário da baía da Babitonga. Totalizando 11 meses de amostragem, foi registrada a presença de 50 espécies, inseridas em 18...