scholarly journals Pelagic seascape ecology for operational fisheries oceanography: modelling and predicting spawning distribution of Atlantic bluefin tuna in Western Mediterranean

2016 ◽  
Vol 73 (7) ◽  
pp. 1851-1862 ◽  
Author(s):  
Diego Alvarez-Berastegui ◽  
Manuel Hidalgo ◽  
María Pilar Tugores ◽  
Patricia Reglero ◽  
Alberto Aparicio-González ◽  
...  
Keyword(s):  
Marine Species ◽  
Bluefin Tuna ◽  
Western Mediterranean ◽  
Spawning Habitat ◽  
Atlantic Bluefin Tuna ◽  
Seascape Ecology ◽  
Temporal And Spatial Variability ◽  
Oceanographic Data ◽  
Spatio Temporal ◽  
Fisheries Oceanography

Abstract The ecology of highly migratory marine species is tightly linked to dynamic oceanographic processes occurring in the pelagic environment. Developing and applying techniques to characterize the spatio-temporal variability of these processes using operational oceanographic data is a challenge for management and conservation. Here we evaluate the possibility of modelling and predicting spawning habitats of Atlantic bluefin tuna in the Western Mediterranean, using pelagic seascape metrics specifically designed to capture the dynamic processes affecting the spawning ecology this species. The different seascape metrics applied were processed from operational oceanographic data products providing information about the temporal and spatial variability of sea surface temperature, kinetic energy and chlorophyll a. Spawning locations were identified using larval abundances sampled in the Balearic Sea, one of the main reproductive areas for this species in the Mediterranean Sea. Results confirm the high dependence of bluefin tuna spawning ecology on mesoscale oceanographic processes while providing spawning habitat maps as a tool for bluefin tuna assessment and management, based on operational oceanographic data. Finally, we discuss the coming challenges that operational fisheries oceanography and pelagic seascape ecology face to become fully implemented as predictive tools.

Characterization of the spawning habitat of Atlantic bluefin tuna and related species in the Balearic Sea (western Mediterranean)

2010 ◽  
Vol 86 (1-2) ◽  
pp. 21-38 ◽  
Author(s):  
F. Alemany ◽  
L. Quintanilla ◽  
P. Velez-Belchí ◽  
A. García ◽  
D. Cortés ◽  
...  
Keyword(s):  
Related Species ◽  
Bluefin Tuna ◽  
Western Mediterranean ◽  
Spawning Habitat ◽  
Atlantic Bluefin Tuna ◽  
Balearic Sea

scholarly journals Assessment of spawning of Atlantic bluefin tuna farmed in the western Mediterranean Sea

2016 ◽  
Vol 8 ◽  
pp. 89-98 ◽  
Author(s):  
A Medina ◽  
G Aranda ◽  
S Gherardi ◽  
A Santos ◽  
B Mèlich ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Bluefin Tuna ◽  
Western Mediterranean ◽  
Atlantic Bluefin Tuna ◽  
Western Mediterranean Sea

scholarly journals Movements and geographic distribution of juvenile bluefin tuna in the Northeast Atlantic, described through internal and satellite archival tags

2018 ◽  
Vol 75 (5) ◽  
pp. 1560-1572 ◽  
Author(s):  
Igor Arregui ◽  
Benjamin Galuardi ◽  
Nicolas Goñi ◽  
Chi Hin Lam ◽  
Igaratza Fraile ◽  
...  
Keyword(s):  
Distribution Patterns ◽  
Bluefin Tuna ◽  
The United States ◽  
Eastern Coast ◽  
Bay Of Biscay ◽  
Atlantic Bluefin Tuna ◽  
Archival Tags ◽  
Feeding Area ◽  
Spatio Temporal ◽  
Surrounding Areas

Abstract From 2005 to 2010, 136 internal archival tags and 29 pop-up satellite archival tags were used to track juvenile Atlantic bluefin tuna in the Bay of Biscay. Information from 15 pop-up and 5 internal archival tags was recovered. The analysis was adapted for a common treatment of both types of tag data, allowing classification of overwintering distribution patterns, fidelity to the Bay of Biscay feeding area, as well as of horizontal and vertical habitat utilization. Results show substantial geographic dispersion from autumn to spring, with high habitat concentration in the Bay of Biscay during summer, when bluefin tuna inhabit in the mixed layer. Of the individuals that left the Bay of Biscay towards the end of the year, a high percentage returned the next year, suggesting a strong fidelity to the area. Thirty-three percent of records during the overwintering periods revealed residency in the Bay of Biscay and surrounding areas. Half of the fish overwintered in the mid-Atlantic, near the Azores or Madeira Islands, while three (17%) made trans-Atlantic round trips, and one individual travelled to and remained off the eastern coast of the United States. These findings challenge previous assumptions regarding the seasonality and annual movements of bluefin tuna from the Bay of Biscay, while demonstrating extensive spatio-temporal dispersion.

scholarly journals Oceanographic changes and exploitation drive the spatio-temporal dynamics of Atlantic bluefin tuna(Thunnus thynnus)

2013 ◽  
Vol 23 (2) ◽  
pp. 147-156 ◽  
Author(s):  
Jean-Marc Fromentin ◽  
Gabriel Reygondeau ◽  
Sylvain Bonhommeau ◽  
Gregory Beaugrand
Keyword(s):  
Temporal Dynamics ◽  
Bluefin Tuna ◽  
Thunnus Thynnus ◽  
Atlantic Bluefin Tuna ◽  
Spatio Temporal

scholarly journals Investigating the suitability of the Slope Sea for Atlantic bluefin tuna spawning using a high-resolution ocean circulation model

2019 ◽  
Vol 76 (6) ◽  
pp. 1666-1677 ◽  
Author(s):  
Irina I Rypina ◽  
Ke Chen ◽  
Christina M Hernández ◽  
Lawrence J Pratt ◽  
Joel K Llopiz
Keyword(s):  
High Resolution ◽  
Water Temperature ◽  
Residence Time ◽  
Ocean Circulation ◽  
Temporal Distribution ◽  
Circulation Model ◽  
Bluefin Tuna ◽  
Ocean Circulation Model ◽  
Atlantic Bluefin Tuna ◽  
Spatio Temporal

Abstract Motivated by recent evidence of Atlantic bluefin tuna spawning in the Slope Sea, we investigated the spatio-temporal distribution of oceanographic conditions that are conducive to successful spawning by bluefin in this region. Specifically, we considered advection patterns and water temperatures based on a new high-resolution ocean circulation model. After validating model velocities and temperatures using observations, three criteria were used to evaluate the success of simulated bluefin spawning during 2013: water temperature at spawning locations, mean water temperature along larval trajectories, and larval residence time within the Slope Sea. Analyses of satellite-based, decade-long (2008–2017) datasets suggest that conditions, specifically water temperatures and advection patterns, in the Slope Sea in 2013 were representative of typical years. The temperature criteria are more frequently satisfied in the southern and southwestern parts of the domain, whereas the residence time criterion favors more northern areas further from the Gulf Stream. The probability map of successful spawning locations shows a maximum near the northwestern bight of the Slope Sea. Spawning success is near-zero through most of June, increases in July, and peaks in early-to-mid August. Overall, water temperatures and retentive capabilities suggest that the Slope Sea provided suitable conditions for successful spawning of bluefin during 2013.

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