Slow Process of Wound Repair in Beluga Whales, Delphinapterus leucas

1987 ◽  
Vol 44 (9) ◽  
pp. 1661-1665 ◽  
Author(s):  
J. R. Geraci ◽  
L. J. Bruce-Allen
Keyword(s):  
Tursiops Truncatus ◽  
Wound Repair ◽  
Epidermal Cells ◽  
Delphinapterus Leucas ◽  
Slow Process ◽  
Beluga Whales ◽  
Bottlenosed Dolphin ◽  
The Difference

Wound repair in beluga whales, Delphinapterus leucas, was studied by examining the sequence and timing of regenerative changes in skin incisions. Soon after the epidermis is breached, exposed cells not normally in contact with seawater begin to degenerate. Within 2 d, the degenerating layer becomes thickened to form a barrier protecting underlying tissue. This layer gradually sloughs as advancing epidermal cells fill the breach. Wound repair is complete in 30–40 d, five times longer than in the bottlenosed dolphin, Tursiops truncatus. Although several factors may be involved, we suggest that the difference in timing appears to relate directly to the greater thickness of epidermis in the whales.

scholarly journals Health reference intervals and values for common bottlenose dolphins (Tursiops truncatus), Indo-Pacific bottlenose dolphins (Tursiops aduncus), Pacific white-sided dolphins (Lagenorhynchus obliquidens), and beluga whales (Delphinapterus leucas)

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0250332
Author(s):  
Lisa K. Lauderdale ◽  
Michael T. Walsh ◽  
Kevin A. Mitchell ◽  
Douglas A. Granger ◽  
Jill D. Mellen ◽  
...  
Keyword(s):  
Tursiops Truncatus ◽  
Bottlenose Dolphins ◽  
Reference Intervals ◽  
Least Square ◽  
Delphinapterus Leucas ◽  
Blood Samples ◽  
Tursiops Aduncus ◽  
Beluga Whales ◽  
Biochemical Variables ◽  
Lagenorhynchus Obliquidens

This study reports comprehensive clinical pathology data for hematology, serum, and plasma biochemistry reference intervals for 174 apparently healthy common bottlenose dolphins (Tursiops truncatus) and reference values for 27 Indo-Pacific bottlenose dolphins (Tursiops aduncus), 13 beluga whales (Delphinapterus leucas), and 6 Pacific white-sided dolphins (Lagenorhynchus obliquidens) in zoos and aquariums accredited by the Alliance for Marine Mammal Parks and Aquariums and the Association of Zoos & Aquariums. Blood samples were collected as part of a larger study titled “Towards understanding the welfare of cetaceans in zoos and aquariums” (colloquially called the Cetacean Welfare Study). Two blood samples were collected following a standardized protocol, and two veterinarian examinations were conducted approximately six months apart between July to November 2018 and January to April 2019. Least square means, standard deviations, and 95% confidence intervals were calculated for hematology, serum, and plasma biochemical variables. Comparisons by age, gender, and month revealed statistically significant differences (p < 0.01) for several variables. Reference intervals and values were generated for samples tested at two laboratories for up to 56 hematologic, serum, and plasma biochemical variables. To apply these data, ZooPhysioTrak, an iOS mobile software application, was developed to provide a new resource for cetacean management. ZooPhysioTrak provides species-specific reference intervals and values based on user inputs of individual demographic and sample information. These data provide a baseline from which to compare hematological, serum, and plasma biochemical values in cetaceans in zoos and aquariums.

scholarly journals Electrophysiological audiograms in seven beluga whales (Delphinapterus leucas) from the Okhotsk Sea population

2018 ◽  
Author(s):  
Evgeniya V. Sysueva ◽  
Dmitry I. Nechaev ◽  
Vladimir V. Popov ◽  
Alexander Ya. Supin
Keyword(s):  
Delphinapterus Leucas ◽  
Okhotsk Sea ◽  
Beluga Whales

Teeth as biomonitors of selenium concentrations in tissues of beluga whales (Delphinapterus leucas)

2008 ◽  
Vol 402 (1) ◽  
pp. 43-50 ◽  
Author(s):  
April Kinghorn ◽  
Murray M. Humphries ◽  
Peter Outridge ◽  
Hing Man Chan
Keyword(s):  
Delphinapterus Leucas ◽  
Beluga Whales

Non-cell-autonomous function of the Antirrhinum floral homeotic proteins DEFICIENS and GLOBOSA is exerted by their polar cell-to-cell trafficking

Development ◽  
1996 ◽  
Vol 122 (11) ◽  
pp. 3433-3441 ◽  
Author(s):  
M.C. Perbal ◽  
G. Haughn ◽  
H. Saedler ◽  
Z. Schwarz-Sommer
Keyword(s):  
Cell Layer ◽  
Epidermal Cells ◽  
Molecular Techniques ◽  
Cell Trafficking ◽  
Mads Box ◽  
Organ Identity ◽  
Cell Layers ◽  
Periclinal Chimeras ◽  
The Difference ◽  
Cell Autonomy

In Antirrhinum majus, petal and stamen organ identity is controlled by two MADS-box transcription factors, DEFICIENS and GLOBOSA. Mutations in either of these genes result in the replacement of petals by sepaloid organs and stamens by carpelloid organs. Somatically stable def and glo periclinal chimeras, generated by transposon excision events, were used to study the non-cell-autonomous functions of these two MADS-box proteins. Two morphologically distinct types of chimeras were analysed using genetic, morphological and molecular techniques. Restoration of DEF expression in the L1 cell layer results in the reestablishment of DEF and GLO functions in L1-derived cells only; inner layer cells retain their mutant sepaloid features. Nevertheless, this activity is sufficient to allow the expansion of petal lobes, highlighting the role of DEF in the stimulation of cell proliferation and/or cell shape and elongation when expressed in the L1 layer. Establishment of DEF or GLO expression in L2 and L3 cell layers is accompanied by the recovery of petaloid identity of the epidermal cells but it is insufficient to allow petal lobe expansion. We show by in situ immunolocalisation that the non-cell-autonomy is due to direct trafficking of DEF and GLO proteins from the inner layer to the epidermal cells. At least for DEF, this movement appears to be polar since DEF acts cell-autonomously when expressed in the L1 cell layer. Furthermore, the petaloid revertant sectors observed on second whorl mutant organs and the mutant margins of petals of L2L3 chimeras suggest that DEF and GLO intradermal movement is limited. This restriction may reflect the difference in the regulation of primary plasmodesmata connecting cells from the same layer and secondary plasmodesmata connecting cells from different layers. We propose that control of intradermal trafficking of DEF and GLO could play a role in maintaining of the boundaries of their expression domains.

Vitamin A and E profiles as biomarkers of PCB exposure in beluga whales (Delphinapterus leucas) from the western Canadian Arctic

2013 ◽  
Vol 142-143 ◽  
pp. 317-328 ◽  
Author(s):  
Jean-Pierre W. Desforges ◽  
Peter S. Ross ◽  
Neil Dangerfield ◽  
Vince P. Palace ◽  
Michael Whiticar ◽  
...  
Keyword(s):  
Vitamin A ◽  
Canadian Arctic ◽  
Delphinapterus Leucas ◽  
Beluga Whales ◽  
Pcb Exposure
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