• Corpus ID: 26577700

Renal cellular and tissue specializations in the bottlenose dolphin ( Tursiops truncatus ) and beluga whale ( Delphinapterus leucas )

  title={Renal cellular and tissue specializations in the bottlenose dolphin ( Tursiops truncatus ) and beluga whale ( Delphinapterus leucas )},
  author={Carl J. Pfei and Er},
In this report selected examples of subcellular specializations and tissue structures of the bottlenose dolphin and beluga whale kidney are presented which illustrate some unique renal adaptations of cetaceans, and other subcellular structures are depicted for here the first time by electron microscopy. Large reservoirs of glycogen in the cortical proximal convoluted tubules, some unique bundles of medullary blood vessels, and the well-known sporta perimedullaris musculosa of the reniculi are… 
Localization of aquaporin-2, renal morphology and urine composition in the bottlenose dolphin and the Baird’s beaked whale
Investigation of the distribution pattern of aquaporin-2, relative medullary thickness (RMT) and urine properties in the bottlenose dolphin and Baird’s beaked whale suggests it is possible that the differences in these renal morphological features may be related in some way to the difference in urine composition between the species, although further studies are necessary.
Molecular and functional characterization of a urea transporter from the kidney of a short-finned pilot whale.
It is concluded that renal urea transporters are highly conserved among mammals inhabiting terrestrial and pelagic environments and may have contributed a fortuitous pre adaptation that enabled the ancestors of cetaceans to reinvade the sea.
De Novo Assembly and Characterization of Narrow-Ridged Finless Porpoise Renal Transcriptome and Identification of Candidate Genes Involved in Osmoregulation
This work utilized RNA-seq to characterize the renal transcriptome and preliminarily analyze the divergence between the NAA and the NAS, and identified nine differentially expressed genes (DEGs) that may be vital in the osmoregulation of the narrow-ridged finless porpoise and worthwhile for future studies.
Adaptive evolution of the osmoregulation-related genes in cetaceans during secondary aquatic adaptation
Evidence for the positive selection of AQP2 and SLC14A2 suggests that the adaptive evolution of these genes has helped to enhance the capacity for water and urea transport, thereby leading to the concentration of urine, which is an efficient mechanism for maintaining the water balance.
Effects of fresh and seawater ingestion on osmoregulation in Atlantic bottlenose dolphins (Tursiops truncatus)
In conclusion, bottlenose dolphins appear to maintain water and plasma solute balance after ingesting fresh water or seawater by altering urine osmolality and solute clearance.
Novel treatment strategies for chronic kidney disease: insights from the animal kingdom
Improved understanding of the susceptibility and protective mechanisms of these animals and others could provide insights into novel strategies to prevent and treat several human diseases, such as CKD and ageing-associated complications.
Organoklorlu Pestisitlerin Yüksek Omurgalı Böbreği Üzerindeki Histopatolojik Etkileri
Dunya nufusunun hizli artisi dogrultusunda aclik sorununun giderilmesi amaciyla tarimsal uretimde pestisitlerin kullanilmasi, cevreye atilan endustriyel atiklar ve diger zehirleyici maddeler toplum
Concentrations of osmotically related constituents in plasma and urine of finless porpoise (Neophocaena asiaeorientalis): implications for osmoregulatory strategies for marine mammals living in freshwater
Results suggest that the freshwater finless porpoise does have different osmoregulatory mechanism from marine cetaceans, and conserving sodium by excreting urine with low ion levels may be an essential strategy to maintain the serum electrolyte balance for the freshwater subspecies that also appears to be more susceptible to hyponatremia.


Macroanatomy of the renicule of the bowhead whale (Balaena mysticetus)
The macroanatomy of renicules and surrounding tissues from the kidneys of five Eskimo‐harvested bowhead whales, Balaena mysticetus, was examined and there are several important differences including the presence of arcuate vessels within the sporta perimedularis, the extension of connective tissue from theSporta deep into the peripheral cortex, and the existence of very large, thin‐walled veins that occupy the interrenicular spaces.
Further observations on the cetacean reniculus.
SYNOPSIS The histological structure of the reniculus is described for the first time in the cetacean forms Delphinaptera leucas, Delphinus bairdi, Stenella styx, Stenella attenuata and Sousa
Rencular morphology and renal vascular system of the harbour porpoise Phocoena phocoena (L.)
The kidneys of 35 harbour porpoises from the western North Atlantic were studied and found greater complexity and variability in the vascular system in the specimens than has been previously reported.
The reniculus of the sei whale (Balaenoptera borealis)
The material examined affords no evidence as to the occurrence of veins ‘wandering’ from the kidney surface directly to renal vein or postcava: the presence of such veins is not, however, thereby excluded.
Microanatomy of the renicule of Balaena mysticetus
Despite less than perfect preservation resulting from environmental and logistical conditions at the collecting sites, it has been possible to document the basic microstructure of most components of the renicule of this endangered species.
Epidermal lipid in several cetacean species: ultrastructural observations
The ultrastructure of the skin of four cetacean species, bottlenose dolphin, long-finned pilot whale, humpback whale, and fin whale was investigated with particular reference to epidermal lipid, finding that its full significance remains obscure.
Blood Vessels of the Mammalian Renal Medulla
Sections and macerated specimens of kidneys from several species of wild and domestic mammals injected with India ink or vinyl acetate, or both, show that the specialized blood vessels of the renal
Epidermal ultrastructure of the southern right whale calf (Eubalaena australis).
The results suggest that the long-tem aquatic evolution of this cetacean species has resulted in a number of integumentary specializations and that investigation of their submicroscopic cytology may help elucidate the general cell biology of nuclear-cytoplasmic interactions.
Tissue glycogen levels in the Weddell seal, Leptonychotes weddelli: a possible adaptation to asphyxial hypoxia.
Neural and muscular control functions of the gut in odontocetes: morphologic evidence in beaked whales and beluga whales.
The findings show myenteric neural modifications and muscularis externa structural specializations which may support voluntary and involuntary fore- and hindgut behavior in two species of toothed whales, the Cuvier's beaked whale and the beluga or white whale, which are discussed relative to their atypical feeding behavior and alimentary tract functions.