scholarly journals Clostridium perfringens septicemia in a long-beaked common dolphin Delphinus capensis: an etiology of gas bubble accumulation in cetaceans

2014 ◽  
Vol 111 (3) ◽  
pp. 183-190 ◽  
Author(s):  
K Danil ◽  
JA St. Leger ◽  
S Dennison ◽  
YB Bernaldo de Quirós ◽  
M Scadeng ◽  
...  
Keyword(s):  
Clostridium Perfringens ◽  
Common Dolphin ◽  
Gas Bubble ◽  
Delphinus Capensis

scholarly journals First Records of Long-beaked Common Dolphins, Delphinus capensis, in Canadian Waters

2005 ◽  
Vol 119 (1) ◽  
pp. 110 ◽  
Author(s):  
John K. B. Ford
Keyword(s):  
British Columbia ◽  
Warm Water ◽  
Common Dolphin ◽  
Central California ◽  
Far North ◽  
Common Dolphins ◽  
Delphinus Capensis

The genus Delphinus has recently been determined to be comprised of two species, the Short-beaked Common Dolphin, D. delphis, and the Long-beaked Common Dolphin, D. capensis. D. delphis is regularly observed in eastern Canadian waters, but is known only from a single stranding in British Columbia. Two specimen records and a series of sightings of D. capensis in British Columbian waters during 1993-2003, detailed here, are the first for this species in Canada. D. capensis normally ranges only as far north as central California, and its abundance in those waters increases in association with warm-water oceanographic events. Although the species appears to be rare in British Columbia, future sightings during warm-water periods might be anticipated.

Captive-born bottlenose dolphin × common dolphin (Tursiops truncatus × Delphinus capensis) intergeneric hybrids

2003 ◽  
Vol 81 (10) ◽  
pp. 1755-1762 ◽  
Author(s):  
Heather R Zornetzer ◽  
Deborah A Duffield
Keyword(s):  
Bottlenose Dolphin ◽  
Tursiops Truncatus ◽  
Electrophoretic Analysis ◽  
Color Pattern ◽  
Intergeneric Hybrids ◽  
Blood Protein ◽  
Common Dolphin ◽  
Body Proportions ◽  
Coloration Patterns ◽  
Delphinus Capensis

Four bottlenose dolphin (Tursiops truncatus) × long-beaked common dolphin (Delphinus capensis) F1 hybrids were born at SeaWorld California between August 1992 and March 1993 to four different bottlenose dolphin dams. Based on coloration patterns of the neonates at the time of birth, as well as time of conception and blood protein electrophoretic analysis, the sire was determined to be a long-beaked common dolphin that was housed with the dams. Two of the F1 hybrids, a male and a female, are alive today and the female gave birth to a live-born backcross (B1) calf sired by a T. truncatus in October 2000. Morphometric and color pattern descriptions are presented here for the two living captive-born F1 hybrids, as well as for the B1 neonate. We have highlighted characteristics that might be indicative of T. truncatus × D. capensis hybridization, including intermediacy between the parents for tooth counts, color and striping patterns, and certain body proportions of the F1 hybrids. The overall size and appearance of the B1 calf were similar to those of a T. truncatus neonate. This note confirms fertility of these intergeneric hybrids.

ISOTOPIC ANALYSIS OF ?13C, ?15N, AND ?34S "A FEEDING TALE" IN TEETH OF THE LONGBEAKED COMMON DOLPHIN, DELPHINUS CAPENSIS

2006 ◽  
Vol 22 (4) ◽  
pp. 831-846 ◽  
Author(s):  
Carlos Alberto Niño-Torres ◽  
Juan Pablo Gallo-Reynoso ◽  
Felipe Galván-Magaña ◽  
Elva Escobar-Briones ◽  
Stephen A. Macko
Keyword(s):  
Isotopic Analysis ◽  
Common Dolphin ◽  
Delphinus Capensis

The cetaceans of Aruba, southern Caribbean

2013 ◽  
Vol 94 (6) ◽  
pp. 1161-1174 ◽  
Author(s):  
Jolanda A. Luksenburg
Keyword(s):  
Killer Whale ◽  
Sperm Whale ◽  
Common Dolphin ◽  
Physeter Macrocephalus ◽  
Cetacean Species ◽  
Additional Species ◽  
Pilot Whale ◽  
Stenella Frontalis ◽  
Spotted Dolphin ◽  
Delphinus Capensis

Aruba is one of the most densely populated islands in the Caribbean. However, very little is known about its cetaceans. In 2010 and 2011, a total of 19721 km (1686 h) boat-based surveys over nearshore transects resulted in 117 positively-identified sightings comprising eight species. New records are also added for one of three previously-documented species. Five additional species were documented from strandings or reports by others. This brings the total number of cetacean species identified in Aruban waters to 16, of which nine are authenticated here for the first time. Atlantic spotted dolphin (Stenella frontalis (N = 59) and bottlenose dolphin (Tursiops truncatus) (N = 33) were the most frequently observed species, with sightings of both year-round, followed by spinner dolphin (S. longirostris) and false killer whale (Pseudorca crassidens). Additional species recorded are pantropical spotted dolphin (S. attenuata), striped dolphin (S. coeruleoalba), common dolphin (Delphinus capensis), rough-toothed dolphin (Steno bredanensis), short-finned pilot whale (Globicephala macrorhynchus), killer whale (Orcinus orca), Risso's dolphin (Grampus griseus), humpback whale (Megaptera novaeangliae), Bryde's/Eden's whale (Balaenoptera brydei/edeni), sperm whale (Physeter macrocephalus) and an unidentified beaked whale (Mesoplodon sp.). All cetaceans were sighted within 22 km of the coast in relatively shallow waters. Sighting rate was low (0.69 cetacean sightings per 100 km). Sightings of calves and neonates indicate that Aruba may be a nursing or breeding area for some species. The presence of several species of cetaceans in Aruba's coastal waters year-round indicates that status and threat assessments are needed to protect them.

174 RECOVERY OF LONG-BEAKED COMMON DOLPHIN OOCYTES FROM KOREAN WATERS

2014 ◽  
Vol 26 (1) ◽  
pp. 201
Author(s):  
S. U. Hwang ◽  
Y. Jeon ◽  
J. D. Yoon ◽  
L. Cai ◽  
E. Kim ◽  
...  
Keyword(s):  
Reproductive Tract ◽  
Morphological Characteristics ◽  
Cumulus Cells ◽  
Reproductive Organ ◽  
Female Reproductive Tract ◽  
Common Dolphin ◽  
Korean Waters ◽  
Reproductive Techniques ◽  
Delphinus Capensis

The aims of this study were to collect oocytes from ovaries of Delphinus capensis (long-beaked common dolphin) and to examine the morphological characteristics of their reproductive organ. Female genital organs were collected from 2 incidentally caught Delphinus capensis (ID-96: estimated 5–6 years, and ID-97: estimated 7–8 years). Collected ovaries were transported to the laboratory over 3.5 h in 0.9% saline at 39°C. To perform assisted reproductive techniques in wild animals, it is important to maximize the number of oocyte recovered per ovary. In this study, Delphinus capensis oocytes were collected by 2 methods: (1) aspiration of visible follicles (2 to 3 mm in diameter) and (2) remnant dissection, in which the ovary is finely dissected. The collected cumulus–oocyte complexes (COC) were separated by ovary of origin and collection method. Oocytes were subjected to in vitro maturation (IVM). Immature oocytes were placed into IVM medium [TCM-199 supplemented with 10% (vol/vol) fetal bovine serum, 0.5 IU mL–1 LH, and 0.5 IU mL–1 porcine FSH] in the 4-well dish for 120 h at 37°C in 5% CO2 in a humidified atmosphere. The uterus type was observed to be a uterus bicornis. Morphology of ovary was similar to the bovine ovary among land animals. In total, 114 oocytes were obtained. From the ovary of ID-97, the number of oocytes recovered by aspiration and ovary dissection were 15 and 57, respectively. However, only 42 oocytes were recovered by ovary dissection from the ovary of ID-96. The number of oocytes recovered per ovary by dissection (49.5 ± 7.5) was higher than that by the aspiration (7.5 ± 7.5) method, but not significantly different (P = 0.06). For accurate statistical analysis, additional trials will be performed. Most oocytes had either no cumulus cells or had only 1 to 2 layers attached to the zona pellucida enclosing a homogeneous cytoplasm. After IVM, all oocytes were at the metaphase I stage, with even fewer attached cumulus cells than at recovery. To summarise, we describe the gross morphology of the female reproductive tract of the long-beaked common dolphin and determined that dissection of the ovary is required for maximal recovery of oocytes. This work was supported, in part, by a grant from the Next-Generation Bio Green 21 Program (No. PJ00956901), Rural Development Administration, and the National Research Foundation of Korea Grant funded by the Korean Government (NRF-2012R1A1A4A01004885, NRF-2013R1A2A2A04008751), Republic of Korea.

Renal and vaginal calculi in a free-ranging long-beaked common dolphin Delphinus capensis

2019 ◽  
Vol 136 (3) ◽  
pp. 265-271
Author(s):  
K Danil ◽  
S Dennison ◽  
E Wurster ◽  
MM Garner ◽  
J Lulich ◽  
...  
Keyword(s):  
Common Dolphin ◽  
Free Ranging ◽  
Delphinus Capensis

Spatio-temporal distribution and habitat preferences of cetaceans in Algoa Bay, South Africa

2017 ◽  
Vol 98 (5) ◽  
pp. 1065-1079 ◽  
Author(s):  
B. L. Melly ◽  
G. McGregor ◽  
G.J.G. Hofmeyr ◽  
S. Plön
Keyword(s):  
Marine Protected Area ◽  
Anthropogenic Activities ◽  
Habitat Preferences ◽  
Temporal Distribution ◽  
Megaptera Novaeangliae ◽  
Common Dolphin ◽  
Tursiops Aduncus ◽  
Eubalaena Australis ◽  
Spatio Temporal ◽  
Delphinus Capensis

Increasingly, baseline knowledge of habitat preferences and movement patterns of marine species is required to inform anthropogenic developments. The aim of this study was to determine baseline spatio-temporal distribution and habitat preference of cetaceans in the coastal waters of Algoa Bay. Areas of potential conflict with anthropogenic activities were also assessed. Monthly sea-based surveys were conducted between June 2008 and May 2011. A total of 500 cetacean sightings comprising six species were recorded in 106 surveys. Tursiops aduncus (Indo-Pacific bottlenose dolphin), Sousa plumbea (Indian Ocean humpback dolphin), Delphinus capensis (long-beaked common dolphin) and Balaenoptera brydei (Bryde's whale) were observed year-round, while Eubalaena australis (southern right whale) and Megaptera novaeangliae (humpback whale) were recorded from May to December. A large portion of sightings were associated with a Marine Protected Area and shipping zones. Eubalaena australis, T. aduncus and S. plumbea were found inshore (water depths < 12 m), while the other species were associated with deeper waters. Tursiops aduncus were most commonly seen (233 sightings). Megaptera novaeangliae were sighted often in austral winter, with 113 sightings. Only nine D. capensis sightings were recorded. Spatial distributions of species were corrected for search effort to identify habitat preferences. A number of key observations were made, including opportunistic foraging in M. novaeangliae, and the expansion of nursery grounds for E. australis, to include Algoa Bay. Four preferred habitat areas are proposed, providing important information for conservation and management of cetaceans in Algoa Bay. The spatial approach can be used to inform future relevant management decisions elsewhere.

scholarly journals Diseases, lesions and malformations in the long-beaked common dolphin Delphinus capensis from the Southeast Pacific

2006 ◽  
Vol 68 ◽  
pp. 149-165 ◽  
Author(s):  
MF Van Bressem ◽  
K Van Waerebeek ◽  
D Montes ◽  
S Kennedy ◽  
JC Reyes ◽  
...  
Keyword(s):  
Common Dolphin ◽  
Southeast Pacific ◽  
Delphinus Capensis
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