Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Reassessment of the franciscana Pontoporia blainvillei (Gervais & d'Orbigny, 1844) distribution and niche characteristics in Brazil
do Amaral, K.B.; Danilewicz, D.; Zerbini, A.; Di Beneditto, A.P.; Andriolo, A.; Alvares, D.J.; Secchi, E.; Ferreira, E.; Sucunza, F.; Borges-Martins, M.; de Oliveira Santos, M.C.; Cremer, M.; Denuncio, P.; Ott, P.H.; Moreno, I.B. (2018). Reassessment of the franciscana Pontoporia blainvillei (Gervais & d'Orbigny, 1844) distribution and niche characteristics in Brazil. J. Exp. Mar. Biol. Ecol. 508: 1-12. https://dx.doi.org/10.1016/j.jembe.2018.07.010
In: Journal of Experimental Marine Biology and Ecology. Elsevier: New York. ISSN 0022-0981; e-ISSN 1879-1697
|  |
| Trefwoorden |
Pontoporia blainvillei (Gervais & d'Orbigny, 1844) [WoRMS]
Marien/Kust |
| Auteurs | | Top |
- do Amaral, K.B.
- Danilewicz, D.
- Zerbini, A.
- Di Beneditto, A.P.
- Andriolo, A.
|
- Alvares, D.J.
- Secchi, E.
- Ferreira, E.
- Sucunza, F.
- Borges-Martins, M.
|
- de Oliveira Santos, M.C.
- Cremer, M.
- Denuncio, P.
- Ott, P.H.
- Moreno, I.B.
|
| Abstract |
The franciscana (Pontoporia blainvillei) is the most threatened small cetacean of South America. The species is endemic to coastal waters of the western South Atlantic Ocean, where it is distributed from Itaúnas (Brazil) to Golfo San Matias (Argentina). Its range was divided in four Franciscana Management Areas (FMAs) for conservation purposes. However, the distribution of the franciscana is not continuous along its range, with two hiatuses proposed in southeastern Brazilian coast. The absence of franciscana records in these regions has been confirmed by multiple years of research, however the reasons for this discontinuous distribution is not well understood. In this study, information on the distribution of the franciscana in south and southeastern Brazil is updated and new limits for FMAs are proposed. NicheA 3.0 software was used to investigate the environmental suitability of distributional gaps in relation to four weakly correlated, allegedly relevant descriptors of franciscana's distribution. In total, 788 records from dedicated aerial and boat surveys and bycatch were used to verify and to confirm the new FMAs limits proposed by franciscana's experts previously. The distributional gaps were reshaped and defined as following: Gap I from Piraquê-Açu River Mouth, Santa Cruz (19°57′S) in the state of Espírito Santo to Barra de Itabapoana (21°18′S) in the state of Rio de Janeiro; and Gap II from Armação dos Búzios (22°44′S) to Piraquara de Dentro (22°59′S) in Rio de Janeiro. The ecological niche model indicated that distributional gaps are inside franciscana's fundamental niche, and are relatively suitable in terms of salinity, temperature, diffuse attenuation and bathymetry. However, the narrow of continental shelf seems to be the main factor explaining the absence of franciscanas in the distributional gaps as well as for the differentiation of some of the FMAs proposed. Narrowness of continental shelf seems to be intensifying the dynamics of biotic interactions promoting food competition for example, and/or causing geographic limitation to maintain minimal viable population size in present or past times periods. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
