Population trends for humpback whales (Megaptera novaeangliae) foraging in the Francisco Coloane Coastal‐Marine Protected Area, Magellan Strait, Chile

2019 ◽  
Vol 35 (4) ◽  
pp. 1212-1231 ◽  
Author(s):  
Cole C. Monnahan ◽  
Jorge Acevedo ◽  
A. Noble Hendrix ◽  
Scott Gende ◽  
Anelio Aguayo‐Lobo ◽  
...  
2016 ◽  
Vol 3 ◽  
pp. 58-66 ◽  
Author(s):  
C.W. Speed ◽  
M.G. Meekan ◽  
I.C. Field ◽  
C.R. McMahon ◽  
R.G. Harcourt ◽  
...  

2015 ◽  
Vol 66 (12) ◽  
pp. 1211 ◽  
Author(s):  
M. L. Dicken ◽  
A. A. Kock ◽  
M. Hardenberg

Direct observations of sharks attacking mysticetes are rare. The present study provides the first direct observation of dusky sharks (Carcharhinus obscurus) attacking a humpback whale (Megaptera novaeangliae) calf. The event was witnessed on 16 July 2014 within the Pondoland Marine Protected Area, South Africa, during the annual sardine run. The event involved a group of ~10 to 20 dusky sharks ranging in length between 2 and 3m. The sharks followed in a loose group behind the whale and attacked it while it was on the surface as well as when diving. Shark bites were concentrated on the left-hand side of the whale’s body primarily between the pectoral fin and tail fluke, with almost no bites on the right-hand side. Most of the bites were superficial and resulted in tooth impressions and scrapes with little tissue removed. The condition of the calf deteriorated over the study period and it was presumed to have drowned from exhaustion when it stopped surfacing. These observations provide a new insight into the potential threat that dusky sharks may pose to whale calves.


Polar Biology ◽  
2021 ◽  
Vol 44 (3) ◽  
pp. 613-619
Author(s):  
Jorge Acevedo ◽  
Juan Capella ◽  
Ted Cheeseman ◽  
Cole C. Monnahan ◽  
Ken Southerland ◽  
...  

Diversity ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 19
Author(s):  
Paolo Vassallo ◽  
Daniele Bellardini ◽  
Michela Castellano ◽  
Giulia Dapueto ◽  
Paolo Povero

This research is part of the LTER (Long-Term Ecological Research) project, a network of terrestrial, freshwater, transitional water and marine sites, on which ecological research is conducted on a multi-decade scale. LTER studies ecosystems, their dynamics and evolution, the relationships between biodiversity and ecological functionality, water quality, productivity, the role of resource availability, the effects of pollution and climate change. The research focuses on the study of the variability of zooplankton groups in the Portofino marine protected area, in Punta Faro. The samplings were carried out in the years 2018–2019, and the results were compared with the values of the years 2003–2005, interesting from a meteorological climatic and biological point of view. The plankton community of the Punta Faro system was analyzed by means of a modeling approach to obtain information on the functionality and health status of the system and to verify whether this has undergone any alterations in the last decade. The analyses carried out show a clear difference between the three-year period 2003–2005 and the two-year period 2018–2019, highlighting how environmental changes, such as the increase in temperature, have led to higher costs of system functioning in the last two years. The mesozooplankton community has changed both in terms of abundance of organisms and in terms of organization and functionality.


2016 ◽  
Vol 42 (2) ◽  
pp. 233-243 ◽  
Author(s):  
Daniela Haro ◽  
Luciana Riccialdelli ◽  
Jorge Acevedo ◽  
Anelio Aguayo-Lobo ◽  
Américo Montiel

2016 ◽  
Vol 75 (sp1) ◽  
pp. 622-626 ◽  
Author(s):  
Beverley Clarke ◽  
Ruth Thurstan ◽  
Katherine Yates

2019 ◽  
Vol 21 (1) ◽  
Author(s):  
Jahza Reytai Khoo Klochko ◽  
Brendan Francis

A comprehensive research study of Cabeza de Toro and Punta Cana’s fishing and tourism industries reveal viability of economic solutions between the hospitality industry, fishermen, and the government to reduce practices harmful to the coastal marine ecosystem.  Recent research studies of Punta Cana and Cabeza de Toro’s coastal marine ecosystem demonstrate diminishing coral coverage and reduced fish populations.  Causes for the decline of the coastal marine ecosystem include overfishing, illegal fishing of species conducive to coral health, and the destruction of mangrove sanctuaries.  By methods of survey and in-person interview, researchers gathered data on over 20% of Cabeza de Toro’s fisherman population with the intent of further developing a co-management plan for the recently established marine protected area.  Data collection included qualitative and quantitative research into income and livelihoods of Cabeza de Toro fishermen, fishing practices, interest in alternative work opportunities, and strength of social responsibility and environmental beliefs.  Findings demonstrate that viable economic applications exist in forging partnerships between fishermen, the tourism and hospitality industries, and the local


2016 ◽  
Vol 114 ◽  
pp. 80-94 ◽  
Author(s):  
Ana Filipa Belo ◽  
Tadeu José Pereira ◽  
Bernardo Ruivo Quintella ◽  
Nuno Castro ◽  
José Lino Costa ◽  
...  

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