scholarly journals Gillnets and conservation of the franciscana dolphin (Pontoporia blainvillei) in Argentina: a policy perspective

2002 ◽  
Vol 1 (1) ◽  
Author(s):  
H. W. Weiskel ◽  
P. Bordino ◽  
A. M. Arias
Keyword(s):  
Policy Perspective ◽  
Pontoporia Blainvillei ◽  
Franciscana Dolphin

Microsatellite markers for the endangered franciscana dolphin (Pontoporia blainvillei)

2021 ◽  
Author(s):  
Haydée A. Cunha ◽  
Teresa E. C. dos Santos ◽  
Luísa C. Alvarenga ◽  
Nathalia P. Cavaleiro ◽  
Marta J. Cremer ◽  
...  
Keyword(s):  
Microsatellite Markers ◽  
Pontoporia Blainvillei ◽  
Franciscana Dolphin

scholarly journals The Karyotype of Franciscana Dolphin (Pontoporia blainvillei)

2008 ◽  
Vol 100 (1) ◽  
pp. 119-122 ◽  
Author(s):  
L. Heinzelmann ◽  
P. C. Chagastelles ◽  
D. Danilewicz ◽  
J. A. B. Chies ◽  
J. Andrades-Miranda
Keyword(s):  
Pontoporia Blainvillei ◽  
Franciscana Dolphin

scholarly journals First record of an anomalously colored franciscana dolphin, Pontoporia blainvillei

2014 ◽  
Vol 86 (3) ◽  
pp. 1221-1226 ◽  
Author(s):  
MARTA J. CREMER ◽  
CAMILA M. SARTORI ◽  
BEATRIZ SCHULZE ◽  
RENAN L. PAITACH ◽  
ANNELISE C. HOLZ
Keyword(s):  
First Record ◽  
Southern Brazil ◽  
First Case ◽  
Pontoporia Blainvillei ◽  
Franciscana Dolphin

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 back in grayish brown. The group, composed by the white franciscana calf, his pontential mother and one more adult, was reported in five occasions. The group was always in the same area where it was first recorded and showed the same position during swimming. Between first and last sighting of the white calf (113 days) the color has not changed. This is the first case of a white franciscana dolphin. This coloration has never been reported despite the high number of dead franciscanas recovered each year along the distribution of the species, resulting from accidental capture in fishing nets. This fact leads us to believe that this is a very rare characteristic for this species. We considered the possibility that this franciscana could be an albino dolphin.

Intrapopulation variation in the diet of franciscana dolphin (Pontoporia blainvillei) off southern Brazil

2021 ◽  
pp. 1-17
Author(s):  
Manuela Bassoi ◽  
Eduardo R. Secchi ◽  
Daniel Danilewicz ◽  
Ignacio B. Moreno ◽  
Roberta A. Santos ◽  
...  
Keyword(s):  
Sexual Maturity ◽  
Linear Models ◽  
Prey Species ◽  
Prey Availability ◽  
Prey Selection ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Brazilian Coast ◽  
Pontoporia Blainvillei ◽  
Franciscana Dolphin

Abstract The franciscana dolphin (Pontoporia blainvillei) is a coastal dolphin endemic to the western South Atlantic Ocean. The dolphin is listed as vulnerable in the IUCN Red List, with incidental catches in gillnet fisheries the greatest conservation concern for this species. Insights into the feeding habits of this dolphin are essential to understand its distribution, movements and use of habitat, which are fundamental for effective management of the species. The feeding habits of franciscana dolphins were investigated from analyses of stomach contents of animals incidentally caught by two fishing operations from southern and northern regions of the southern Brazilian coast. In this study we investigate the existence of intrapopulation (sexual maturity and sex-related) variation in the diet of the franciscana dolphin, evaluating the spatial (northern and southern geographic areas) and seasonal influences. The analyses were based on Linear and Generalized Linear Models (LM and GLM). The majority of identified prey species were bottom-dwelling teleosts and the squid Doryteuthis sanpaulensis. The most important prey differed spatially and seasonally between northern and southern regions of the study area, and our results revealed significant differences between sexes and sexual maturity stages, mainly related to prey species sizes. This variation might indicate differences in prey selection, availability or habitat use patterns among these groups. In any case, these dietary differences are likely to minimize intraspecific competition for food resources, and/or indicate spatio-temporal variation in prey availability.

scholarly journals Incidental mortality of franciscana dolphin (Pontoporia blainvillei) in Argentina

2007 ◽  
Vol 6 (2) ◽  
Author(s):  
H. L. Cappozzo ◽  
M. F. Negri ◽  
F. H. Pérez ◽  
D. Albareda ◽  
F. Monzón ◽  
...  
Keyword(s):  
Pontoporia Blainvillei ◽  
Incidental Mortality ◽  
Franciscana Dolphin

scholarly journals Feeding habits of the franciscana dolphin (Pontoporia blainvillei) in south-eastern Brazil

2020 ◽  
Vol 100 (2) ◽  
pp. 301-313
Author(s):  
Laura Busin Campos ◽  
Xênia Moreira Lopes ◽  
Ednilson da Silva ◽  
Marcos César de Oliveira Santos
Keyword(s):  
Feeding Habits ◽  
Stomach Contents ◽  
Small Fish ◽  
South Eastern ◽  
Important Prey ◽  
Fishing Vessels ◽  
Eastern Brazil ◽  
Significant Difference ◽  
Pontoporia Blainvillei ◽  
Franciscana Dolphin

AbstractThis study evaluated the feeding habits of the franciscana dolphin (Pontoporia blainvillei) in south-eastern Brazil. Stomach contents were collected from a total of 145 dead specimens found incidentally caught by fishing vessels or stranded between 2005 and 2015. Fish otoliths, cephalopod beaks and whole non-digested prey were used for prey species identification. A total of 9337 prey items were identified, including 26 species of teleost fishes and three species of cephalopods. The most important prey families were Sciaenidae among fish and Loliginidae among cephalopods. Franciscana dolphins tended to feed on small fish (mean = 5.25 cm) and cephalopods (mean = 8.57 cm). The index of relative importance (IRI) showed that Pellona harroweri and Doryteuthis plei were the most important prey for both males and females. The PERMANOVA test confirmed that there is no significant difference between the feeding habits of different sexes, but detected a significant difference among seasons. Overall, our results show that franciscana dolphins are predominantly ichthyophagous and non-selective in relation to the type of prey, feeding on pelagic, demersal and pelagic-demersal prey.

Franciscana dolphin ( Pontoporia blainvillei ) phonic lips: Correction about fused phonic lips

2019 ◽  
Vol 35 (2) ◽  
pp. 718-721
Author(s):  
Javier S. Tellechea ◽  
Martin Lima ◽  
William Perez
Keyword(s):  
Pontoporia Blainvillei ◽  
Franciscana Dolphin

Intra-specific isotope variations of franciscana dolphin Pontoporia blainvillei regarding biological parameters and distinct environments

2017 ◽  
Vol 85 ◽  
pp. 47-54
Author(s):  
María Natalia Paso Viola ◽  
Luciana Riccialdelli ◽  
María Fernanda Negri ◽  
María Victoria Panebianco ◽  
Hector Osvaldo Panarello ◽  
...  
Keyword(s):  
Biological Parameters ◽  
Pontoporia Blainvillei ◽  
Franciscana Dolphin
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