Spatio-temporal patterns of genetic variations in populations of yellowtail kingfishSeriola lalandifrom the south-eastern Pacific Ocean and potential implications for its fishery management

2016 ◽  
Vol 90 (1) ◽  
pp. 249-264 ◽  
Author(s):  
F. A. Sepúlveda ◽  
M. T. González
Keyword(s):  
Pacific Ocean ◽  
Fishery Management ◽  
Temporal Patterns ◽  
Genetic Variations ◽  
Eastern Pacific ◽  
Eastern Pacific Ocean ◽  
The South ◽  
South Eastern ◽  
Spatio Temporal

scholarly journals Discovering sounds in Patagonia, characterizing sei whale (<i>Balaenoptera borealis</i>) downsweeps in the south-eastern Pacific Ocean

2018 ◽  
Author(s):  
Sonia Español-Jiménez ◽  
Paulina A. Bahamonde ◽  
Gustavo Chiang ◽  
Verena Häussermann
Keyword(s):  
Pacific Ocean ◽  
Peak Frequency ◽  
Eastern Pacific ◽  
Absolute Maximum ◽  
Maximum Frequency ◽  
Eastern Pacific Ocean ◽  
The South ◽  
South Eastern ◽  
Average Maximum ◽  
The Absolute

Abstract. Sei whales (Balaenoptera borealis) is the least known whale species. Information on sei whale´s vocalizations in the south-eastern Pacific Ocean and its regional variability are even more scarce than that from other ocean areas. This research presents the first characterization of sei whale sounds recorded in Chile during austral autumn of 2016 and 2017. A total of 41 calls have been attributed to sei whale’s downsweeps. In 2016, calls ranged from an average maximum frequency of 105.3 Hz down to an average minimum 35.6 Hz over 1.6 s with a peak frequency of 65.4 Hz. During 2017, calls ranged from an average maximum frequency of 93.3 Hz down to 42.2 Hz (over 1.6 s) with a peak frequency of 68.3 Hz. The absolute minimum frequency recorded was 30 Hz and the absolute maximum frequency was 129.4 Hz. Calls generally occurred in pairs, but triplets or singles were also registered. These low frequency sounds share characteristics with recordings of sei whales near the Hawaii Islands, but with differences in the maximum frequencies and duration. These calls distinctly differ from sounds previously described for sei whales in the Southern Ocean and are the first documented sei whale calls in the South-eastern Pacific.

Egg capsules of the yellownose skate Zearaja chilensis (Guichenot 1848) and the roughskin skate Dipturus trachyderma (Krefft and Stehmann 1974) (Rajiformes: Rajidae) from the south-eastern Pacific Ocean

2012 ◽  
Vol 59 (4) ◽  
pp. 323-327 ◽  
Author(s):  
Francisco Concha ◽  
María Cristina Oddone ◽  
Carlos Bustamante ◽  
Naití Morales
Keyword(s):  
Pacific Ocean ◽  
Eastern Pacific ◽  
Eastern Pacific Ocean ◽  
The South ◽  
Egg Capsules ◽  
South Eastern

scholarly journals Local and global environmental drivers of growth chronologies in a demersal fish in the south-eastern Pacific Ocean

2021 ◽  
Vol 131 ◽  
pp. 108151
Author(s):  
Guillermo Moyano ◽  
Guido Plaza ◽  
Francisco Cerna ◽  
Ariel A. Muñoz
Keyword(s):  
Pacific Ocean ◽  
Demersal Fish ◽  
Eastern Pacific ◽  
Environmental Drivers ◽  
Eastern Pacific Ocean ◽  
The South ◽  
South Eastern ◽  
Global Environmental

New digeneans (Opecoelidae) from hydrothermal vent fishes in the south eastern Pacific Ocean, including one new genus and five new species

Zootaxa ◽  
2014 ◽  
Vol 3768 (1) ◽  
pp. 73 ◽  
Author(s):  
R. A. BRAY ◽  
A. WAESCHENBACH ◽  
P. DYAL ◽  
D. T.J. LITTLEWOOD ◽  
S. MORAND
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Hydrothermal Vent ◽  
New Genus ◽  
Eastern Pacific ◽  
Eastern Pacific Ocean ◽  
The South ◽  
South Eastern

Spatial genetic structure and demographic inference of the Patagonian squid Doryteuthis gahi in the south-eastern Pacific Ocean

2011 ◽  
Vol 92 (1) ◽  
pp. 197-203 ◽  
Author(s):  
Christian M. Ibáñez ◽  
Juan Argüelles ◽  
Carmen Yamashiro ◽  
Luis Adasme ◽  
Renato Céspedes ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Pacific Ocean ◽  
Spatial Genetic Structure ◽  
Demographic History ◽  
Wide Distribution ◽  
Eastern Pacific ◽  
Eastern Pacific Ocean ◽  
The South ◽  
South Eastern ◽  
Demographic Inference

Doryteuthis gahi is a small squid species that has a wide distribution in South America. This species is characterized by coastal and benthic spawning, and its ontogenetic vertical migration is associated with upwelling zones, features that may restrict its dispersal potential. It has also been proposed that populations of these neritic squid are structured by the influence of local processes which act as barriers to gene flow. Based on this background, we evaluate the geographical structure of genetic diversity in D. gahi along its distribution in the south-eastern Pacific Ocean. We used 116 COI mtDNA sequences of squid collected from different sites in Peru and Chile and calculated genetic diversity, the population structure index Fst, and performed analysis of spatial molecular variance and exact tests to detect differences among localities. To infer demographic history we carried out tests of neutrality and Bayesian skyline analysis. Although there was little molecular divergence between Peru and Chile, we detected a significant genetic differentiation of D. gahi along its geographical distribution. Squid from Chile showed higher genetic diversity than those of Peru and the results of the demographic inference analysis suggest that the population of Peru is experiencing or experienced in the recent past demographic expansion, a pattern that was not found in Chile. We think that the current genetic patterns are consequences of northward migrations in the glaciation periods and posterior re-colonization of southern Chile in the deglacial period.

Egg capsules of the dusky catshark Bythaelurus canescens (Carcharhiniformes, Scyliorhinidae) from the south-eastern Pacific Ocean

2010 ◽  
Vol 77 (4) ◽  
pp. 963-971 ◽  
Author(s):  
F. Concha ◽  
C. Bustamante ◽  
M. C. Oddone ◽  
S. Hernández ◽  
J. Lamilla
Keyword(s):  
Pacific Ocean ◽  
Eastern Pacific ◽  
Eastern Pacific Ocean ◽  
The South ◽  
Egg Capsules ◽  
South Eastern
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