External morphology of the short-beaked common dolphin, Delphinus delphis: growth, allometric relationships and sexual dimorphism

2006 ◽  
Vol 87 (4) ◽  
pp. 315-329 ◽  
Author(s):  
Sinéad Murphy ◽  
Emer Rogan
2017 ◽  
Vol 124 (3) ◽  
pp. 247-252 ◽  
Author(s):  
J Díaz-Delgado ◽  
E Sierra ◽  
AI Vela ◽  
M Arbelo ◽  
D Zucca ◽  
...  

2018 ◽  
Vol 5 (5) ◽  
pp. 172470 ◽  
Author(s):  
Stephanie K. Courtney Jones ◽  
Adam J. Munn ◽  
Phillip G. Byrne

Captive breeding programmes are increasingly relied upon for threatened species management. Changes in morphology can occur in captivity, often with unknown consequences for reintroductions. Few studies have examined the morphological changes that occur in captive animals compared with wild animals. Further, the effect of multiple generations being maintained in captivity, and the potential effects of captivity on sexual dimorphism remain poorly understood. We compared external and internal morphology of captive and wild animals using house mouse ( Mus musculus ) as a model species. In addition, we looked at morphology across two captive generations, and compared morphology between sexes. We found no statistically significant differences in external morphology, but after one generation in captivity there was evidence for a shift in the internal morphology of captive-reared mice; captive-reared mice (two generations bred) had lighter combined kidney and spleen masses compared with wild-caught mice. Sexual dimorphism was maintained in captivity. Our findings demonstrate that captive breeding can alter internal morphology. Given that these morphological changes may impact organismal functioning and viability following release, further investigation is warranted. If the morphological change is shown to be maladaptive, these changes would have significant implications for captive-source populations that are used for reintroduction, including reduced survivorship.


2018 ◽  
Vol 137 ◽  
pp. 526-532 ◽  
Author(s):  
Alberto Hernandez-Gonzalez ◽  
Camilo Saavedra ◽  
Jesús Gago ◽  
Pablo Covelo ◽  
M. Begoña Santos ◽  
...  

2015 ◽  
Vol 51 (1) ◽  
pp. 283-286 ◽  
Author(s):  
Diaz-Delgado Josue ◽  
Sierra Eva ◽  
Vela Ana Isabel ◽  
Dominguez Lucas ◽  
Andrada Marisa ◽  
...  

Animals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3123
Author(s):  
Rebecca Souter ◽  
Anne-Lise Chaber ◽  
Ken Lee ◽  
Aaron Machado ◽  
Jia Lam ◽  
...  

Streptococcus iniae (S. iniae) is a significant aquatic pathogen of farmed fish species, important zoonotic pathogen, and reported cause of disease in captive Amazon River dolphins (Inia geoffrensis) and a bottlenose dolphin (Tursiops truncatus). Here we report S. iniae as the cause of subcutaneous abscesses, sepsis and mortality in a juvenile free-ranging short-beaked common dolphin (Delphinus delphis) found deceased on a metropolitan Australian beach. Body surfaces were covered by multifocal, depressed, deep, irregular cutaneous ulcerations, which microscopically were characterised by ruptured subcutaneous abscesses with intralesional cocci. Routine microbiological investigations revealed a heavy growth of beta-haemolytic Streptococcus sp. identified as Streptococcus iniae in skin lesions as well as from heart blood, the latter supportive of sepsis. Tissues were negative for cetacean morbillivirus and no other disease processes were identified. S. iniae has not been reported in free-ranging marine mammals, nor in Australian delphinids, previously. More notably a pathogen of captive animals, this case report identifies S. iniae as a pathogen of wild dolphins also. In addition to expanding the host reservoir of a significant zoonotic pathogen, determining the source of infection as well as possible consequences for other marine mammals and wild and intensive fish stocks warrants further investigations.


2012 ◽  
Vol 101 (3) ◽  
pp. 257-260 ◽  
Author(s):  
J Díaz-Delgado ◽  
los Espinosa de los Monter ◽  
C Fernández-Maldonado ◽  
M Arbelo ◽  
O Quesada-Canales ◽  
...  

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