scholarly journals Spatial and temporal occurrence of fin whales (Balaenoptera physalus) and euphausiids (Nyctiphanes simplex) in the Ballenas Channel, Gulf of California, Mexico

2015 ◽  
Vol 41 (2) ◽  
pp. 125-142 ◽  
Author(s):  
Paloma Ladron-de-Guevara
Keyword(s):  
Gulf Of California ◽  
Balaenoptera Physalus ◽  
Temporal Occurrence ◽  
Fin Whales

Evidence of a calving ground of the resident population of fin whales ( Balaenoptera physalus ) in the Gulf of California

2021 ◽  
Author(s):  
Daniela Bernot‐Simon ◽  
Lorena Viloria‐Gómora ◽  
Alejandro Gómez‐Gallardo ◽  
Jorge Urbán R.
Keyword(s):  
Gulf Of California ◽  
Balaenoptera Physalus ◽  
Resident Population ◽  
Fin Whales

Organochlorine pesticides and polychlorinated biphenyls in fin whales (Balaenoptera physalus) from the Gulf of California

2009 ◽  
Vol 25 (4) ◽  
pp. 381-390 ◽  
Author(s):  
Carlos Alberto Niño-Torres ◽  
Tania Zenteno-Savín ◽  
Susan C. Gardner ◽  
Jorge Urbán R.
Keyword(s):  
Polychlorinated Biphenyls ◽  
Organochlorine Pesticides ◽  
Gulf Of California ◽  
Balaenoptera Physalus ◽  
Fin Whales

scholarly journals Autumn movements of fin whales (Balaenoptera physalus) from Svalbard, Norway, revealed by satellite tracking

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Christian Lydersen ◽  
Jade Vacquié-Garcia ◽  
Mads Peter Heide-Jørgensen ◽  
Nils Øien ◽  
Christophe Guinet ◽  
...  
Keyword(s):  
Satellite Tracking ◽  
The Other ◽  
Life History Strategies ◽  
High Latitudes ◽  
Breeding Area ◽  
Balaenoptera Physalus ◽  
Westerly Direction ◽  
Satellite Transmitters ◽  
Fin Whales ◽  
Insight Into

Abstract Insight into animal movements is essential for understanding habitat use by individuals as well as population processes and species life-history strategies. In this study, we instrumented 25 fin whales with ARGOS satellite-transmitters in Svalbard, Norway, to study their movement patterns and behaviour (Area Restricted Search (ARS), transiting or unknown) during boreal autumn/early winter. Ten of the whales stayed in the tagging area (most northerly location: 81.68°N) for their entire tracking periods (max 45 days). The other 15 whales moved in a south-westerly direction; the longest track ended off the coast of northern Africa (> 5000 km from the tagging location) after 96 days. The whales engaged in ARS behaviour intermittently throughout their southward migrations. During transit phases the whales moved quickly; one individual maintained an average horizontal speed of 9.3 km/h (travelling 223 km per day) for a period of a week. This study documents that: (1) some fin whales might remain at high latitudes during winter; (2) the whales that do migrate probably feed along the way; (3) they can maintain high transiting speed for long periods and; (4) one breeding area for this species is likely located in deep, warm water some 100 km west of Morocco.

scholarly journals Impacts of Whale-Watching on the Short-Term Behavior of Fin Whales (Balaenoptera physalus) in a Marine Protected Area in the Southeastern Pacific

2021 ◽  
Vol 8 ◽  
Author(s):  
Macarena Santos-Carvallo ◽  
Fernanda Barilari ◽  
María José Pérez-Alvarez ◽  
Laura Gutiérrez ◽  
Guido Pavez ◽  
...  
Keyword(s):  
Marine Protected Area ◽  
Management Strategies ◽  
Movement Patterns ◽  
Economic Benefits ◽  
Observation Point ◽  
Behavioral Patterns ◽  
Whale Watching ◽  
Balaenoptera Physalus ◽  
Fin Whales ◽  
Response Variables

Whale-watching (WW) is an activity which has been increasing worldwide due to the great interest of tourists and the economic benefits it provides to local communities. However, it has been reported that this activity affects the behavioral patterns of some cetaceans, although for some species such as the fin whale (Balaenoptera physalus) this has not been extensively studied. To identify the effects of WW on the behavioral patterns of this species, we studied its traveling and resting behaviors in a locality of north-central Chile from 2015 to 2018. Using a theodolite, we calculated the response variables of swim speed, directness index, and reorientation for each behavior. We used the number of WW boats and the WW scenarios of “before”, “during”, and “after” the presence of boats as possible factors to explain the differences in the response variables of the whales, along with the factors of year, month, group size, and distance from the observation point. Reorientation increased significantly and the directness index decreased significantly for both traveling and resting behaviors from “before” to “during” WW scenarios, indicating more erratic and sinuous movements in the presence of boats. These changes in movement patterns are a commonly reported evasion response of cetaceans to the presence of WW boats. For traveling behavior, the swimming speed significantly increased, and trends showed increased reorientation and a decrease in the directness index in the “after” WW scenario, which suggests perturbation of the whales potentially associated with the speed and the direction in which the boats left. During resting behavior, the trajectories of the fin whales became straighter (decrease in reorientation) as the number of boats increased, thus evasion (more erratic and sinuous movements) is a behavior used less by fin whales as the number of boats increases. Notwithstanding the fact that tourism development in the study area is small in scale, we found that WW generates adverse effects that are reflected in changes in the whales’ movement patterns. This kind of information is valuable to the adjustment and/or design of management strategies for the species, which is fundamental for WW to continue to be a sustainable activity.

Occurrence of Fin Whales (Balaenoptera physalus) Between Vancouver Island and Continental North America

2018 ◽  
Vol 99 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Jared R Towers ◽  
Mark Malleson ◽  
Christie J McMillan ◽  
Jane Cogan ◽  
Susan Berta ◽  
...  
Keyword(s):  
North America ◽  
Vancouver Island ◽  
Balaenoptera Physalus ◽  
Fin Whales
Sign in / Sign up

Export Citation Format

Share Document