Results 71 to 80 of about 13,085 (251)

Inflation and deflation pressure-volume loops in anesthetized pinnipeds confirms compliant chest and lungs

Frontiers in Physiology, 2014
We examined structural properties of the marine mammal respiratory system, and tested Scholander’s hypothesis that the chest is highly compliant by measuring the mechanical properties of the respiratory system in five species of pinniped under anesthesia
Andreas eFahlman, Stephen H Loring, Shawn P Johnson, Shawn P Johnson, Martin eHaulena, Andrew W Trites, Vanessa A Fravel, William George Van Bonn, William George Van Bonn   +8 more
doaj   +1 more source

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

The Anatomical Record, EarlyView.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano, Matheus P. S. Rocha, Francisco P. Lima‐Filho, Aline M. Ghilardi   +3 more
wiley   +1 more source

Does salinity make a difference—Kidney anatomy of Saimaa (Pusa saimensis) and Baltic ringed seals (Pusa hispida botnica)

The Anatomical Record, EarlyView.
Abstract As habitat salinity markedly differs between the endangered, freshwater‐dwelling Saimaa ringed seal (Pusa saimensis Nordquist, 1899) and the brackish water‐inhabiting Baltic ringed seal (Pusa hispida botnica Gmelin, 1788), we investigated whether this difference has resulted in morphological changes to their kidneys.
Heini Nihtilä, Juha Laakkonen
wiley   +1 more source

Post‐Release Survival and Behavioral Recovery of a Rehabilitated Short‐Finned Pilot Whale (Globicephala macrorhynchus) in the South China Sea Revealed Through Satellite Tracking

Ecology and Evolution
Post‐release monitoring is critical for evaluating the success of rehabilitating stranded cetaceans, yet such data are scarce for many species in the South China Sea (SCS).
Mingming Liu, Mingli Lin, Agathe Serres, Mingyue Ouyang, Songhai Li   +4 more
doaj   +1 more source

Spring haul-out behavior of seals in the Bering and Chukchi Seas: implications for abundance estimation [PDF]

PeerJ
Ice-associated seals rely on sea ice for a variety of activities, including pupping, breeding, molting, and resting. In the Arctic, many of these activities occur in spring (April through June) as sea ice begins to melt and retreat northward.
Josh M. London, Paul B. Conn, Stacie M. Koslovsky, Erin L. Richmond, Jay M. Ver Hoef, Michael F. Cameron, Justin A. Crawford, Andrew L. Von Duyke, Lori Quakenbush, Peter L. Boveng   +9 more
doaj   +2 more sources

Patterns of spinal motion, kinematic spaces and the land‐to‐sea transition in carnivorans

The Anatomical Record, EarlyView.
Using 3D reconstructions, we quantify intervertebral joint mobility to investigate how cervical, thoracic, and lumbar vertebral regions evolved distinct kinematic roles in pinnipeds. The findings reveal lineage‐specific adaptations for swimming and highlight the functional significance of vertebral joint flexibility in ecological transitions.
Juan Miguel Esteban, Alberto Martín‐Serra, Alejandro Pérez‐Ramos, Borja Figueirido   +3 more
wiley   +1 more source

Nasal soft‐tissue anatomy of Triceratops and other horned dinosaurs

The Anatomical Record, EarlyView.
Abstract Although ceratopsid dinosaurs possess a characteristically hypertrophied narial region, soft‐tissue anatomy associated with such a skeletal structure and their biological significance remain poorly understood. The present study provides the first comprehensive hypothesis on the soft‐tissue anatomy in the ceratopsid rostrum based on the Extant ...
Seishiro Tada, Takanobu Tsuihiji, Hiroki Ishikawa, Noriyuki Wakimizu, Soichiro Kawabe, Kodai Sakane   +5 more
wiley   +1 more source

A density surface model describing the habitat of the Critically Endangered Rice’s whale Balaenoptera ricei in the Gulf of Mexico

Endangered Species Research
The newly recognized Rice’s whale Balaenoptera ricei is among the most endangered large whale species in the world and primarily occupies a region near the continental shelf break in the northeastern Gulf of Mexico (GoMex).
LP Garrison, MS Soldevilla, A Martinez, KD Mullin   +3 more
doaj   +1 more source

Zooarchaeological Analysis of an Atoll Assemblage From Central Micronesia

Archaeology in Oceania, EarlyView.
ABSTRACT There has been a dearth of archaeological research on atolls in the central‐eastern Caroline Islands of Micronesia. This has limited our understanding of pre‐contact subsistence and settlement strategies in these more marginal and remote environments, particularly in regards to zooarchaeological data.
Philippa Jorissen, Gabriel Sanchez, Scott M. Fitzpatrick   +2 more
wiley   +1 more source

Comparison of nephrolithiasis prevalence in two bottlenose dolphin (Tursiops truncatus) populations

Frontiers in Endocrinology, 2013
In humans, ammonium urate nephrolithiasis is rare in the Western hemisphere and more common in Japan and developing countries. Among a variety of risk factors, insulin resistance has been associated with urate nephrolithiasis in people.
Cynthia Rowe Smith, Stephanie eVenn-Watson, Randall S. Wells, Shawn P. Johnson, Natalie eMaffeo, Brian C. Balmer, Eric D. Jensen, Forrest eTownsend, Khashayar eSakhaee   +8 more
doaj   +1 more source