Zobrazeno 1 - 10
of 160
pro vyhledávání: '"Todd M O'Hara"'
Autor:
Julie P. Avery, J. Margaret Castellini, Nicole Misarti, Mary Keenan, Angela Gastaldi, Caroline Funk, Todd M. O’Hara, Lorrie D. Rea
Publikováno v:
Frontiers in Ecology and Evolution, Vol 11 (2023)
Millennial-scale datasets of heavy metals in biota are difficult to obtain but are important for determining patterns and underlying drivers of toxicant concentrations. This is particularly important to better discriminate contemporary natural and an
Externí odkaz:
https://doaj.org/article/362729675f2847ae9230fb293f8965d1
Autor:
Todd M. O'Hara, Debra L. Miller, Gregory D. Bossart, Mehrdad Nadji, Raymond Tarpley, Brenda Roberts
Publikováno v:
J. Cetacean Res. Manage.. 4:149-153
Leydig cells have been found to be either unidentifiable or at apparent low numbers during routine histologic examination of bowhead whale testes. Therefore, formalin-fixed, paraffin-embedded testicular tissues from 14 bowhead whales were retrospecti
Publikováno v:
J. Cetacean Res. Manage.. 10:107-117
Assessment of element concentrations in wildlife must address both nutritional and toxicological considerations. The liver, epidermis, muscle and kidney of the bowhead whale are rich in some essential and non-essential elements. Blubber tends to have
Autor:
Marianne Lian, J. Margaret Castellini, Debra Miller, Brooke Griff, Vladimir V. Vertyankin, Jennifer Dupont, Koen Broker, Céline A. J. Godard-Codding, Todd M. O’Hara
Publikováno v:
Frontiers in Marine Science, Vol 7 (2020)
The gray whale (Eschrichtius robustus) is recognized as two geographically isolated and somewhat genetically distinct populations, with recent evidence showing exchange that questions the degree of isolation. The western gray whale subpopulation is c
Externí odkaz:
https://doaj.org/article/c5a76714947240cf9d49564b7f8f8dbf
Publikováno v:
Environ Toxicol Chem
Steller sea lion (Eumetopias jubatus) tissue mercury concentrations increasingly above thresholds of concern occur in regions of Alaska where lack of population recovery is noted. Selenium–monomethylmercury interactions may mitigate toxicosis but m
Autor:
Rogelio González-Armas, Abraham Vázquez-Haikin, Todd M. O’Hara, Felipe Galván-Magaña, Federico Páez-Osuna, Darren A. Whitehead, Francesca Pancaldi, Martín F. Soto-Jiménez, Ana J. Marmolejo-Rodríguez
Publikováno v:
Environmental Science and Pollution Research. 28:36803-36816
The Gulf of California represents an important hotspot for whale shark (Rhincodon typus) aggregation. Anthropogenic activities and natural sources could expose sharks to high levels of trace elements (TEs). To determinate these levels in this endange
Autor:
Raúl O. Martínez-Rincón, Isis Baró-Camarasa, Fernando R. Elorriaga-Verplancken, Ana J. Marmolejo-Rodríguez, Todd M. O’Hara, Abel Trejo-Ramírez, Felipe Galván-Magaña
Publikováno v:
Journal of Fish Biology. 98:784-790
Nitrogen stable isotopes ratios (δ15 N) were determined for selected tissues (muscle, liver, blood and yolk) of pregnant females and their embryos of a placental viviparous species, the Pacific sharpnose shark (Rhizoprionodon longurio), and a yolk-s
Autor:
Lorrie Darlene Rea, Gina M. Ylitalo, Stephanie G. Crawford, Brian D. Taras, Brian S. Fadely, Michael J. Rehberg, Todd M. O'Hara
Publikováno v:
SSRN Electronic Journal.
Autor:
Alberto Sánchez-González, Todd M. O'Hara, Fernando R. Elorriaga-Verplancken, Pablo Curiel-Godoy, Emigdio Marín-Enríquez, Felipe Galván-Magaña, Daniela A. Murillo-Cisneros, Ana J. Marmolejo-Rodríguez
Publikováno v:
Environmental Biology of Fishes. 102:1519-1531
Along the Pacific coast of Baja California Sur (PCBCS), the banded guitarfish (Zapteryx exasperata), shovelnose guitarfish (Pseudobatos productus) and bat ray (Myliobatis californica) are highly abundant. Their ecological roles as predators in demers