Variation in Spinner Dolphins (Stenella longirostris) from the Eastern Tropical Pacific Ocean: Sexual Dimorphism in Cranial Morphology

1986 ◽  
Vol 67 (3) ◽  
pp. 537-544 ◽  
Author(s):  
M. E. Douglas ◽  
G. D. Schnell ◽  
D. J. Hough
Keyword(s):  
Sexual Dimorphism ◽  
Pacific Ocean ◽  
Tropical Pacific ◽  
Cranial Morphology ◽  
Tropical Pacific Ocean ◽  
Eastern Tropical Pacific ◽  
Stenella Longirostris ◽  
Spinner Dolphins

scholarly journals Mitogenomic differentiation in spinner (Stenella longirostris) and pantropical spotted dolphins (S. attenuata) from the eastern tropical Pacific Ocean

2016 ◽  
Author(s):  
Leslie Matthew S. ◽  
Archer Frederick I. ◽  
Morin Phillip A.
Keyword(s):  
Pacific Ocean ◽  
Haplotype Diversity ◽  
Morphological Diversity ◽  
Tropical Pacific ◽  
Tropical Pacific Ocean ◽  
Eastern Tropical Pacific ◽  
Stenella Longirostris ◽  
Snp Data ◽  
Subspecies Level ◽  
Spinner Dolphins

AbstractSpinner dolphins (Stenella longirostris) and spotted dolphins (S. attenuata) show high intraspecific morphological diversity and endemic subspecies in the eastern tropical Pacific Ocean (ETP). Previous studies of mitochondrial DNA (mtDNA) have found low genetic differentiation among most of these groups, possibly due to demographic factors, ongoing gene flow, and/or recent divergence. These species were heavily depleted due to bycatch in the ETP yellowfin tuna fishery. Because population structure is important for accurate management of the recovery of these species, we collected whole mitochondrial genome sequences from 104 spinner and 76 spotted dolphins to test structure hypotheses at multiple hierarchical levels. Our results showed significant differences between subspecies of spotted (FST: 0.0125; P = 0.0402) and spinner dolphins (FST: 0.0133; P = 0.034), but no support for the division of existing offshore stocks of spotted dolphins or Tres Marias spinner dolphins. We compare these results to previous results of genome-wide nuclear SNP data and suggest high haplotype diversity, female dispersal, male philopatry, or relative power of the two datasets explains the differences observed. Our results further support a genetic basis for biologically meaningful management units at the subspecies level, and provide a critical component to mitigating historical and continued fishery interactions.

scholarly journals Oceanographic influences on the diet of 3 surface-migrating myctophids in the eastern tropical Pacific Ocean

2016 ◽  
Vol 114 (3) ◽  
pp. 274-287 ◽  
Author(s):  
Joel E. Van Noord ◽  
Robert J. Olson ◽  
Jessica V. Redfern ◽  
Leanne M. Duffy ◽  
Ronald S. Kaufmann
Keyword(s):  
Pacific Ocean ◽  
Tropical Pacific ◽  
Tropical Pacific Ocean ◽  
Eastern Tropical Pacific

The Seasonal Cycle and Its Modulation in the Eastern Tropical Pacific Ocean

1997 ◽  
Vol 27 (10) ◽  
pp. 2209-2218 ◽  
Author(s):  
Daifang Gu ◽  
S. G. H. Philander ◽  
Michael J. McPhaden
Keyword(s):  
Pacific Ocean ◽  
Seasonal Cycle ◽  
Tropical Pacific ◽  
Tropical Pacific Ocean ◽  
Eastern Tropical Pacific
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