scholarly journals On the taxonomy of the first record of rare deep-water rough shark species of Oxynotidae (Chondrichthyes: Squaliformes) in the western Indian Ocean

2018 ◽  
Vol 10 (6) ◽  
pp. 11732
Author(s):  
Sarah Viana ◽  
Mark W. Lisher
Keyword(s):  
Indian Ocean ◽  
Western Indian Ocean ◽  
First Record ◽  
Hepatosomatic Index ◽  
Shark Species ◽  
General Description ◽  
Intraspecific Variations ◽  
Eastern Atlantic Ocean ◽  
Viable Population ◽  
Morphological Differences

An immature female specimen of rough shark was collected south of Reunion Island in the Madagascar Basin in 2009 aboard R/V Dr. Fridtjof Nansen, representing the first official record of the family Oxynotidae in the western Indian Ocean.  The specimen is herein identified as Oxynotus sp. due to morphological differences with its closely similar congeners O. centrina and O. bruniensis regarding morphometrics, shape of dorsal, pectoral and caudal fins, shape of the head and colouration, refuting the hypothesis of occurrence of these two species in the region.  These results indicate that Oxynotus sp. is possibly an undescribed species.  A general description of the external morphology, external morphometrics and photographs of Oxynotus sp. are provided.  The specimen has a hepatosomatic index of 36.33% which reveals that it was possibly approaching maturation, suggesting that a viable population of Oxynotus sp. exists in the western Indian Ocean.  Intraspecific variations in O. centrina from the Mediterranean Sea and eastern Atlantic Ocean are also noticed, requiring further taxonomic scrutiny.  

scholarly journals New host and distribution record of Pontobdella macrothela (Schmarda, 1861) (Annelida, Hirudinea) from a Grey Reef Shark, Carcharhinus amblyrhynchos (Bleeker, 1856), in Mozambique, Western Indian Ocean

Check List ◽  
2019 ◽  
Vol 15 (2) ◽  
pp. 265-268
Author(s):  
Clare A. Keating Daly ◽  
Danielle Orrell ◽  
Isabel M. da Silva ◽  
João P. F. Macuio ◽  
Tessa N. Hempton ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Western Indian Ocean ◽  
First Record ◽  
New Host ◽  
Reef Shark ◽  
The Third ◽  
Distribution Record

This report describes the first record of the piscicolid leech Pontobdella macrothela from Mozambique waters and the first record of P. macrothela parasitizing a Grey Reef Shark (Carcharhinus amblyrhynchos). The leech, P. macrothela, was found attached externally between the third and fourth gill slits of a shark captured off Vamizi Island, Quirimbas Archipelago, northern Mozambique. 

A new deep-water goatfish of the genus Upeneus (Mullidae) from northern Australia and the Philippines, with a taxonomic account of U. subvittatus and remarks on U. mascareinsis

Zootaxa ◽  
2012 ◽  
Vol 3550 (1) ◽  
pp. 61 ◽  
Author(s):  
FRANZ UIBLEIN ◽  
MARK MCGROUTHER
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Deep Water ◽  
Western Indian Ocean ◽  
First Record ◽  
The Philippines ◽  
Northern Australia ◽  
Meristic Characters ◽  
The Pacific ◽  
Interspecific Comparisons

Upeneus stenopsis n. sp. is described based on four specimens collected off northern Australia and Quezon Island,Philippines, at depths between 165 to 275 m and compared with four closely related species: the deep-water dwellingUpeneus davidaromi (Red Sea) and U. mascareinsis (Western Indian Ocean) and the shallow Indo-West Pacific species,U. subvittatus and U. vittatus. The new species can be distinguished from all other Upeneus species by a narrow caudalpeduncle and a combination of morphometric and meristic characters. This is the first record of a deep-water goatfish ofthe genus Upeneus from the Pacific. A juvenile Upeneus collected off Quezon at 127–142 m depth was also assigned tothe new species and compared to four similar-sized (69–79 mm SL) specimens of U. mascareinsis. A diagnosis is providedfor U. subvittatus, along with evidence of its occurrence in the Eastern Indian Ocean and interspecific comparisons. Thecontinued need to screen scientific fish collections for the occurrence of undescribed species that have successfully colonized and adapted to the depth zone surrounding the ocean margin is outlined.

scholarly journals The distribution and population of Seychelles Black Paradise-flycatcher Terpsiphone corvina on La Digue: implications for conservation and translocation

2003 ◽  
Vol 13 (4) ◽  
pp. 307-318 ◽  
Author(s):  
Dave Currie ◽  
Rachel Bristol ◽  
James Millett ◽  
Nirmal Jivan Shah
Keyword(s):  
Indian Ocean ◽  
Tree Species ◽  
Western Indian Ocean ◽  
Critically Endangered ◽  
Native Forest ◽  
World Population ◽  
Small Populations ◽  
Freshwater Bodies ◽  
Viable Population ◽  
Equivalent Reduction

The 10 km2 island of La Digue, Republic of Seychelles, western Indian Ocean supports the last viable population of the Critically Endangered Seychelles Black Paradise-flycatcher Terpsiphone corvina. Small populations recorded on adjacent islands since the 1980s appear to be ephemeral and not self-sustaining. We document the results of the first island-wide survey of the flycatcher on La Digue using the playback of conspecific calls at random points. Previous surveys were based largely on counting the number of singing males. The survey was conducted between April and August 2001 and confirmed (i) the current world population is at least 200 individuals (109-145 territories, 218-290 individuals) in a c. 4.4 km2 range, thus accurately quantifying the documented increase in flycatcher numbers since the late 1970s; (ii) territories were more widely distributed than previously recorded and not exclusively associated with coastal plateaux or freshwater bodies, contrary to previous descriptions; and (iii) distribution was determined largely by the presence of high canopy (native) broad-leaved tree species. The importance of canopy height to flycatchers was highlighted by the fact that localized loss of high canopy (native) forest (4%), in a 161 ha study area on the large western plateau, resulted in an equivalent reduction (4%) in the number of territories. In light of our findings we discuss the implications for conservation of the flycatcher on La Digue and its possible translocation.

Southern high latitude squat lobsters II: description of Uroptychus macquariae sp. nov. from Macquarie Ridge

Zootaxa ◽  
2017 ◽  
Vol 4353 (2) ◽  
pp. 327
Author(s):  
KAREEN E. SCHNABEL ◽  
INGO BURGHARDT ◽  
SHANE T. AHYONG
Keyword(s):  
Indian Ocean ◽  
Sequence Data ◽  
Western Indian Ocean ◽  
Molecular Data ◽  
Separate Species ◽  
The Indian Ocean ◽  
Morphological Differences ◽  
Morphological And Molecular Data ◽  
Southern High Latitude ◽  
Squat Lobsters

Squat lobsters have only recently been recorded from the Macquarie Ridge, which extends south between New Zealand and Antarctica. Among these, Uroptychus insignis (Henderson, 1885) was recorded for the first time outside the western Indian Ocean, exhibiting only subtle morphological differences. Reexamination of the Macquarie Ridge and Indian Ocean specimens attributed to U. insignis using morphological and molecular data revealed the Macquarie Ridge form to represent a separate species. Subtle but consistent morphological differences are evident and partial CO1 sequence data indicates that the specimens collected on Macquarie Ridge differ from those collected in the Indian Ocean by more than 7%. The Macquarie Ridge species is described herein as Uroptychus macquariae n.sp. Subtle morphological differences between the new species and U. insignis are discussed.  

Life after death: behaviour of multiple shark species scavenging a whale carcass

2019 ◽  
Vol 70 (2) ◽  
pp. 302 ◽  
Author(s):  
J. S. E. Lea ◽  
R. Daly ◽  
C. Leon ◽  
C. A. K. Daly ◽  
C. R. Clarke
Keyword(s):  
Indian Ocean ◽  
Western Indian Ocean ◽  
Sperm Whale ◽  
Shark Species ◽  
Tiger Shark ◽  
Nurse Shark ◽  
Life After Death ◽  
Galeocerdo Cuvier ◽  
Carcharhinus Leucas ◽  
Bull Shark

A drone was used to study the richness and behaviour of scavengers attracted to the carcass of a sperm whale (Physeter microcephalus) in Seychelles, Western Indian Ocean. Over 30 sharks of 3 species (tiger shark Galeocerdo cuvier, bull shark Carcharhinus leucas and tawny nurse shark Nebrius ferrugineus) were recorded scavenging on the carcass. Tiger sharks dominated the scavenging, but with no evidence of agonistic behaviours or hierarchy, and may have facilitated scavenging by other species. Drone use allowed the analysis of such behaviours without observer influence, providing new insights into communal scavenging events.

scholarly journals First record of Gymnocranius griseus (Temminck & Schlegel, 1843) (Family Lethrinidae) from southern Oman, Western Indian Ocean

2011 ◽  
Vol 9 ◽  
pp. 1-5 ◽  
Author(s):  
L. A. Jawad ◽  
◽  
Y. Iwatsuki ◽  
S. R. A. Al-Shogebai ◽  
J. M. Al-Mamry ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Western Indian Ocean ◽  
First Record

scholarly journals First record of Kentrocapros rosapinto (Tetraodontiformes: Ostraciidae) from Vema Seamount (south-east Atlantic)

2003 ◽  
Vol 83 (4) ◽  
pp. 779-780
Author(s):  
A. Armesto ◽  
R. Bañón ◽  
D. Garabana ◽  
P. Durán
Keyword(s):  
Indian Ocean ◽  
Atlantic Ocean ◽  
Western Indian Ocean ◽  
First Record ◽  
The South ◽  
East Atlantic

The capture of a specimen of Kentrocapros rosapinto at Vema Seamount in the south-east Atlantic Ocean is reported as the first record of this species in the Atlantic Ocean. This species was previously known only from the western Indian Ocean.

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