Latin American Journal of Aquatic Mammals最新文献

{"title":"William Fergus Perrin - a marine mammalogist ‘for all seasons’","authors":"L. Dolar, M. Barbieri, E. Crespo, D. Palacios, L. Pastene, L. Ponnampalam, L. Rajamani, J. Reyes, L. Rojas-Bracho, E. Secchi, Gabriel Hoinsoudé Segniagbeto, S. Siciliano, D. Sutaria, J. Urbán R., John Y. Wang, T. Yamada, K. Van Waerebeek","doi":"10.5597/lajam00287","DOIUrl":"https://doi.org/10.5597/lajam00287","url":null,"abstract":"This is an obituary for William F. Perrin.","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82297259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Easy food in the jungle: evaluating presence and relationships of Amazon River dolphin (Inia geoffrensis) at a provisioning site in the Amazon, Brazil","authors":"Marcelo Derzi Vidal, Priscila Maria Da Costa Santos, M. Marmontel, Jailson Fulgêncio de Moura, S. Siciliano","doi":"10.5597/lajam00282","DOIUrl":"https://doi.org/10.5597/lajam00282","url":null,"abstract":"Provisioning food to wildlife is a strategy used to habituate animals to human proximity during tourism activities, but it can contribute to changes in individual behavior and social structure and impacts on the nutritional health status. This article evaluates the presence and relationships of Amazon River dolphins (Inia geoffrensis) in feeding sessions at a floating house in Anavilhanas National Park, Brazil. The Amazon River dolphins most frequently observed during the study period also presented higher constancy in the feeding sessions. Food provisioning had a variable impact on Amazon River dolphins, making it possible to identify regular, occasional, and rare visitors. The most frequently observed Amazon River dolphins showed strong connectivity, with some individuals playing an important role in the network, acting as a bridge, connecting the set of nodes. These results provide important information about the level of conditioning and social relationships of Amazon River dolphins, which can assist in the development of strategies aimed at reducing the negative population health consequences of supplying food.","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"105 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80705275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interannual shifts in sea surface temperature and chlorophyl drive the relative abundance and group size of common bottlenose dolphins Tursiops truncatus on the Southeast Gulf of California","authors":"Karen M Zepeda-Borja, E. Morteo, Oscar R. Guzón‐Zatarain, H. Pérez-España, C. A. Delfín-Alfonso, J. Bello-Pineda","doi":"10.5597/lajam00278","DOIUrl":"https://doi.org/10.5597/lajam00278","url":null,"abstract":"Despite being one of the most common odontocetes off Sinaloa (Mexican Pacific coast), basic studies on the ecology of common bottlenose dolphins (Tursiops truncatus) are scarce in the region. This study aimed to describe changes in the relative abundance, group size, and behavior of this species during 2007 – 2012. We used boat-based surveys and satellite images of sea surface temperature (SST) and chlorophyll-a (Chl-a) to model changes in dolphin relative abundance (RA) over time, using correlations in time series analyses. Overall, mean RA was 3.6 dolphins h-1 (SD = 8.0), and significantly higher RA (6.4 –16.7 dolphins h-1) occurred in 2008, 2011, 2012, which was concurrent with hydrographic effects of La Niña oceanographic conditions, as well as during the upwelling season (February – April) (SST: 17.3 – 25.0 °C; Chl-a: 3.7 – 21.4 mg m-3). Conversely, significantly lower RA values (0.5 – 3.8 dolphins h-1) occurred in 2007 and 2010 that were likely associated with El Niño effects on the biological productivity of the area (Chl-a: 0.3 – 7.6 mg m-3). We found significant correlations between monthly Chl-a and SST average values with mean bottlenose dolphins RA, and lags (22 – 29 days) in the trophic response to variations of the hydrographic parameters. Significantly larger dolphin groups were recorded during La Niña years possibly because of the higher availability of their prey. This hypothesis is supported by higher feeding frequencies (35 – 73%) observed during the upwelling seasons, especially during La Niña conditions, whereas the most frequent behavior throughout all other years was traveling (28 – 69%). Our results show that RA and group size of bottlenose dolphins inhabiting the waters off Sinaloa, Mexico, are likely influenced by the changes in hydrographic parameters, especially during extreme climatic events.","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80555604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"River dolphins (Inia geoffrensis and Sotalia fluviatilis) in the Peruvian Amazon: habitat preferences and feeding behavior","authors":"Amanda Belanger, Andrew Wright, Catalina G. Gomez, Jack D. Shutt, Kimberlyn Chota, R. Bodmer","doi":"10.5597/lajam00268","DOIUrl":"https://doi.org/10.5597/lajam00268","url":null,"abstract":"To estimate river dolphin habitat preference through density, as well as which habitats were preferred for feeding in the Pacaya- Samiria National Reserve, surveys were conducted during the high- to low-water season transition, from 2016 to 2018, in the channels, lakes, and confluences of the Samiria River. Both the Amazon river dolphin and tucuxi dolphin showed a preference for the confluences. The wide channel (Amazon: 24.8 dolphins/ km2, tucuxi: 7.6 dolphins/km2) and narrow channel (Amazon: 73.0 dolphins/km2; tucuxi: 6.0 dolphins/km2) also had high dolphin densities, especially for the Amazon river dolphins. In contrast with previous studies, the lakes had the lowest densities of dolphins for both species. High proportions of feeding behavior were observed in the confluence and wide channel habitats. The potentially larger presence of fish in these two habitats is likely the primary reason for the high dolphin densities. The high dolphin densities in the narrow channel, on the other hand, were associated with a low proportion of feeding behavior. Therefore, there are likely separate environmental factors attracting the dolphins, although additional data will be required to determine these factors. The results of this study will continue to help identify potential conservation and management actions by contributing to a better understanding of the ecology of river dolphins and their dependence on various habitats in one of the world’s largest protected flooded forests. ","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"115 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72952490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Is the reproductive area of the humpback whale (Megaptera novaeangliae) in Brazilian waters increasing? Evidence of breeding and calving activities around Ilhabela, São Paulo, Brazil","authors":"M. E. Morete, M. L. Marques, Rafaela Carvalho de Souza, Isabelle A. Tristão, Márcio C. Motta, Cristiane C. A. Martins, J. Cardoso, Arlaine Francisco","doi":"10.5597/lajam00281","DOIUrl":"https://doi.org/10.5597/lajam00281","url":null,"abstract":"Maria Emilia Morete1*, Marina L. Marques1,4, Rafaela C.F. de Souza1 , Isabelle A. Tristão1, Márcio C. Motta1, Cristiane C.A. Martins2, Julio Cardoso3 and Arlaine Francisco3 1VIVA Instituto Verde Azul, Avenida Borrifos 70, 11630-000 Ilhabela, SP, Brazil 2Tryphon Océans, 608 Chemin des Battures, Tadoussac, G0T 2A0, QC, Canada 3Projeto Baleia à Vista, Rua Manuel da Silva Junior 237, Cocaia, 11630-000 Ilhabela, SP, Brazil 4Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, km 16, 45662-900 Ilhéus, BA, Brazil","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74971049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First record of orca predation on franciscana dolphins (Pontoporia blainvillei) in Argentina","authors":"Antonella D. Padula, J. Gana, G. Giardino, M. C. de León, A. Elissamburu, D. Rodríguez, P. Denuncio","doi":"10.5597/lajam00283","DOIUrl":"https://doi.org/10.5597/lajam00283","url":null,"abstract":"Antonella D. Padula1*, Joaquín C.M. Gana1, Gisela V. Giardino1 , M. Carolina De Leon1, Andrea Elissamburu1, Diego H. Rodriguez1 and Pablo Denuncio1,2 1Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad Nacional de Mar del Plata (UNMdP), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Funes 3350, CC1260, 7600 Mar del Plata, Argentina 2Asociación de Naturalistas Geselinos, Villa Gesell, Argentina","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77850596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insights on the residency status and inter-island movement patterns of pantropical spotted dolphins Stenella attenuata in the Agoa Sanctuary, Eastern Caribbean","authors":"Baptiste Courtin, Cédric Millon, A. Feunteun, M. Safi, Nathalie Duporge, Jaime Bolaños‐Jiménez, Dalia C. Barragán-Barrera, Laurent Bouveret, B. de Montgolfier","doi":"10.5597/lajam00277","DOIUrl":"https://doi.org/10.5597/lajam00277","url":null,"abstract":"The pantropical spotted dolphin (PSD, Stenella attenuata) is the most common cetacean species observed within the Agoa Sanctuary, located in the Lesser Antilles, Eastern Caribbean. These dolphins are easily observable and are the main target of whale-watching activities along the leeward coasts of Guadeloupe and Martinique islands. Because PSD is common within the sanctuary it is considered a resident species, however, no research has been carried out to estimate its population status and movement patterns between islands. Previous unpublished work found the sighting of an individual in Martinique and Guadeloupe, suggesting potential exchange of individuals between these islands. To test this hypothesis a photo-ID survey in 2018 and 2019 was conducted, resulting in 54,298 photographs. With no matches of individuals between islands, our findings do not support regular exchange of PSD individuals between Martinique and Guadeloupe. However, given previous re-sighting data, it is possible that movement of individuals between islands exists but at lower frequencies than expected, which can only be detected through long-term surveys. Additionally, populations from both islands showed relatively high site fidelity. We found that in Guadeloupe the PSD population is homogeneously distributed along the coast. In contrast, in Martinique the PSD population was composed of two resident groups concentrated in one area. Moreover, 70 new individuals were identified in Guadeloupe and 54 in Martinique while POPAN modelling estimated the number of marked individuals in the study area during 2018 and 2019 at 89 in Guadeloupe and 90 in Martinique. This research provides the first insights on the residency and movement patterns of S. attenuata in the Agoa Sanctuary and can inform future efforts in management and conservation.","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74691767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cetacean sightings in the Caribbean Sea of Guatemala","authors":"Jenniffer Ortiz-Wolford, M. F. Corona-Figueroa, Oscar Hugo Machuca Coronado, Ana Giró Petersen","doi":"10.5597/lajam00279","DOIUrl":"https://doi.org/10.5597/lajam00279","url":null,"abstract":"Jenniffer Suzzán Ortiz-Wolford1,2*, Mildred Fabiola Corona-Figueroa2,3, Oscar Hugo Machuca Coronado2,4 and Ana Giró Petersen5 1Departamento de Investigación Marino-Costera, Semillas del Océano (SDO), 13 calle 12-50 Zona 17, Finca Lomas del Norte, Interior de Tecnifibras, Ciudad de Guatemala, 01017, Guatemala 2Centro de Datos para la Conservación (CDC), Centro de Estudios Conservacionistas (CECON), Universidad de San Carlos de Guatemala (USAC), Avenida Reforma 0-63 zona 10, Ciudad de Guatemala, 01010, Guatemala 3Departamento de Sistemática y Ecología Acuática, El Colegio de la Frontera Sur (ECOSUR), Avenida Centenario km 5.5, Chetumal 77014, Quintana Roo, México 4Asociación Guatemalteca de Mastozoólogos (ASOGUAMA), 41 calle 16-24 zona 8, Ciudad de Guatemala, 01008, Guatemala 5Healthy Reefs for Healthy People Initiative (HRI), 17 calle “A” 7-03 zona 10, Ciudad de Guatemala, 01010, Guatemala","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"113 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89689451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study and conservation of the Guiana Dolphin (Sotalia guianensis) (Van Bénéden, 1864) in French Guiana","authors":"Amandine Bordin, Margot Vanhoucke, Kévin Pineau, Laurent Kelle, Nolwenn Cozannet, Monique Pool, Jaime Bolaños‐Jiménez, B. de Thoisy","doi":"10.5597/lajam00276","DOIUrl":"https://doi.org/10.5597/lajam00276","url":null,"abstract":"The Guiana dolphin (Sotalia guianensis) occurs in warm and shallow waters of the Atlantic Ocean and the Caribbean Sea, from southern Brazil to Honduras, including estuarine and freshwater habitats such as Maracaibo Lake (Venezuela), and the Orinoco River. In 2018, the Guiana dolphin was reclassified from Data Deficient to Near Threatened on the global IUCN Red List. Nevertheless, the conservation status identified by national and regional Red Lists is even more alarming. In French Guiana, for example, the species is classified as Endangered based on strong pressures such as bycatch. In this region, the Guiana dolphin inhabits river mouths and coastal waters where most anthropogenic activities occur. Better knowledge of the biology and ecology is needed in French Guiana to help inform effective conservation actions. Here, we present ongoing studies to map the distribution of Guiana dolphins along the French Guiana coast and estimate abundance in a hotspot area. Aerial survey campaigns were conducted during the dry season in 2013, 2014, 2015, and 2019. Eight flights were conducted and 146 dolphins belonging to 39 groups were observed. Boat-based line-transect surveys were also conducted in the coastal waters of Cayenne in 2017 and 2018. Twenty-one survey trips were conducted covering 999.06 km. Three hundred and eighty-two dolphins belonging to 63 groups were observed. The total abundance in the Cayenne area was estimated at 128 dolphins (% CV = 30.92; CI (95%) = 70-235) with a density of 0.80 ind./km² (% CV = 30.92; CI (95%) = 0.44-1.47). Additionally, a descriptive analysis was performed on stranding data collected in French Guiana between 2014 and 2020 to identify the major cause of death and seasonality in the stranding events. In total, 43 dolphins were found, especially on the beaches of Rémire-Montjoly, Cayenne, and Kourou: bycatch was the major identifiable cause of death. We recommend a local conservation strategy and actions to be undertaken in the short- and medium-term to address different issues: knowledge, threats, conservation, and cooperation.","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89515066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two cases of malformations in bottlenose dolphins Tursiops truncatus (Montagu, 1821) in Aragua, Venezuela","authors":"S. Cobarrubia-Russo, Imogen Sawyer, Alimar Molero","doi":"10.5597/lajam00280","DOIUrl":"https://doi.org/10.5597/lajam00280","url":null,"abstract":"Sergio Cobarrubia-Russo1*, Imogen Sawyer2, and Alimar Molero-Lizarraga3 1Laboratory of Ecosystems and Global Change, Ecology Center, Venezuelan Institute for Scientific Research, P.O. Box 20632, Caracas 1020-A, Venezuela 2Scottish Association for Marine Science, Oban, Argyll, PA37 1QA, Scotland 3Biological Diversity Unit, Venezuelan Institute for Scientific Research, P.O. Box 20632, Caracas 1020-A, Venezuela","PeriodicalId":17967,"journal":{"name":"Latin American Journal of Aquatic Mammals","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86539276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}