Faculty Opinions recommendation of Population level "flipperedness" in the eastern Pacific leatherback turtle.

2013 ◽  
Author(s):  
Peter F MacNeilage
Keyword(s):  
Population Level ◽  
Eastern Pacific ◽  
Leatherback Turtle

Population level “flipperedness” in the eastern Pacific leatherback turtle

2010 ◽  
Vol 206 (1) ◽  
pp. 135-138 ◽  
Author(s):  
Annette E. Sieg ◽  
Eugenia Zandonà ◽  
Victor M. Izzo ◽  
Frank V. Paladino ◽  
James R. Spotila
Keyword(s):  
Population Level ◽  
Eastern Pacific ◽  
Leatherback Turtle

Population-level morphological variation of Anisotremus interruptus (Gill, 1862) (Perciformes: Haemulidae) in the Tropical Eastern Pacific, with the description of two new species

Zootaxa ◽  
2021 ◽  
Vol 4975 (1) ◽  
pp. 141-158
Author(s):  
EDGAR ADRIÁN ACEVEDO-ÁLVAREZ ◽  
GORGONIO RUIZ-CAMPOS ◽  
OMAR DOMÍNGUEZ-DOMÍNGUEZ
Keyword(s):  
New Species ◽  
Population Level ◽  
Taxonomic Diversity ◽  
Oceanic Islands ◽  
Eastern Pacific ◽  
Tropical Eastern Pacific ◽  
Morphometric Variation ◽  
Galapagos Archipelago ◽  
Two New Species ◽  
Revillagigedo Archipelago

The family Haemulidae is a wide-ranging group of marine fishes that are of significant commercial value in the Tropical Eastern Pacific (TEP). Phylogenetic studies on the species Anisotremus interruptus have revealed high levels of genetic diversity as well as divergence among populations in the TEP, which suggests that the taxonomic diversity of A. interruptus could be underestimated. Anisotremus interruptus has a large distribution, ranging from central Baja California, Mexico to northern Peru, including all oceanic islands except Clipperton. Recent genetic studies on this taxon indicate the presence of a species complex of at least three distinctive lineages. We performed a comparative study of the population-level meristic and morphometric variation of A. interruptus in the TEP to evaluate and identify possible morphological features concordant with the genetic differentiation of populations. Our results provide evidence of the presence of two new species of the genus Anisotremus, A. perezponcedeleoni sp. n. from the Revillagigedo Archipelago and A. espinozai sp.n. from Galapagos Archipelago-Cocos Island. 

scholarly journals On the dispersal of leatherback turtle hatchlings from Mesoamerican nesting beaches

2012 ◽  
Vol 279 (1737) ◽  
pp. 2391-2395 ◽  
Author(s):  
George L. Shillinger ◽  
Emanuele Di Lorenzo ◽  
Hao Luo ◽  
Steven J. Bograd ◽  
Elliott L. Hazen ◽  
...  
Keyword(s):  
Large Scale ◽  
Early Life History ◽  
Eastern Pacific ◽  
Dermochelys Coriacea ◽  
Conservation Strategies ◽  
Leatherback Turtles ◽  
Leatherback Turtle ◽  
Emergence Period ◽  
Eddy Transport ◽  
Nesting Beaches

So little is known about the early life history of leatherback turtles ( Dermochelys coriacea ) from hatchling to adulthood that this period has been termed the ‘lost years’. For critically endangered eastern Pacific leatherback populations, continued and rapid declines underscore the urgent need to develop conservation strategies across all life stages. We investigate leatherback hatchling dispersal from four Mesoamerican nesting beaches using passive tracer experiments within a regional ocean modelling system. The evolution of tracer distribution from each of the nesting beaches showed the strong influence of eddy transport and coastal currents. Modelled hatchlings from Playa Grande, Costa Rica, were most likely to be entrained and transported offshore by large-scale eddies coincident with the peak leatherback nesting and hatchling emergence period. These eddies potentially serve as ‘hatchling highways’, providing a means of rapid offshore transport away from predation and a productive refuge within which newly hatched turtles can develop. We hypothesize that the most important leatherback nesting beach remaining in the eastern Pacific (Playa Grande) has been evolutionarily selected as an optimal nesting site owing to favourable ocean currents that enhance hatchling survival.

Occurrence and biogeographic significance of Heliaster (Echinodermata: Asteroidea) from the Pliocene of southwest Florida

1988 ◽  
Vol 62 (01) ◽  
pp. 126-132 ◽  
Author(s):  
Douglas S. Jones ◽  
Roger W. Portell
Keyword(s):  
Central American ◽  
Eastern Pacific ◽  
Whole Body ◽  
Marine Fauna ◽  
Western Atlantic ◽  
Southwest Florida ◽  
Extant Species ◽  
Geologic Record ◽  
Central American Isthmus

Whole body asteroid fossils are rare in the geologic record and previously unreported from the Cenozoic of Florida. However, specimens of the extant species,Heliaster microbrachiusXantus, were recently discovered in upper Pliocene deposits. This marks the first reported fossil occurrence of the monogeneric Heliasteridae, a group today confined to the eastern Pacific. This discovery provides further non-molluscan evidence of the close similarities between the Neogene marine fauna of Florida and the modern fauna of the eastern Pacific. The extinction of the heliasters in the western Atlantic is consistent with the pattern of many other marine groups in the region which suffered impoverishment following uplift of the Central American isthmus.

P032 E-CIGARETTE AND CIGARETTE USE AMONG U.S. ADULT IBD PATIENTS: POPULATION-LEVEL SURVEY

2020 ◽  
Vol 158 (3) ◽  
pp. S102
Author(s):  
Ryan Suk ◽  
Heetae Suk ◽  
Kalyani Sonawane ◽  
Ashish Deshmukh
Keyword(s):  
Population Level ◽  
Cigarette Use

Cranial crassicaudiasis in two coastal dolphin species from South Africa is predominantly a disease of immature individuals

2020 ◽  
Vol 139 ◽  
pp. 93-102 ◽  
Author(s):  
MF Van Bressem ◽  
P Duignan ◽  
JA Raga ◽  
K Van Waerebeek ◽  
N Fraijia-Fernández ◽  
...  
Keyword(s):  
South Africa ◽  
Bone Development ◽  
Bottlenose Dolphins ◽  
Fatal Outcome ◽  
Population Level ◽  
Cape Coast ◽  
Osteolytic Lesions ◽  
Immune Mediated ◽  
Significant Difference ◽  
The Difference

Crassicauda spp. (Nematoda) infest the cranial sinuses of several odontocetes, causing diagnostic trabecular osteolytic lesions. We examined skulls of 77 Indian Ocean humpback dolphins Sousa plumbea and 69 Indo-Pacific bottlenose dolphins Tursiops aduncus, caught in bather-protecting nets off KwaZulu-Natal (KZN) from 1970-2017, and skulls of 6 S. plumbea stranded along the southern Cape coast in South Africa from 1963-2002. Prevalence of cranial crassicaudiasis was evaluated according to sex and cranial maturity. Overall, prevalence in S. plumbea and T. aduncus taken off KZN was 13 and 31.9%, respectively. Parasitosis variably affected 1 or more cranial bones (frontal, pterygoid, maxillary and sphenoid). No significant difference was found by gender for either species, allowing sexes to be pooled. However, there was a significant difference in lesion prevalence by age, with immature T. aduncus 4.6 times more likely affected than adults, while for S. plumbea, the difference was 6.5-fold. As severe osteolytic lesions are unlikely to heal without trace, we propose that infection is more likely to have a fatal outcome for immature dolphins, possibly because of incomplete bone development, lower immune competence in clearing parasites or an over-exuberant inflammatory response in concert with parasitic enzymatic erosion. Cranial osteolysis was not observed in mature males (18 S. plumbea, 21 T. aduncus), suggesting potential cohort-linked immune-mediated resistance to infestation. Crassicauda spp. may play a role in the natural mortality of S. plumbea and T. aduncus, but the pathogenesis and population level impact remain unknown.

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