| organization of peripheral nerves and spinal roots of the atlantic stingray, dasyatis sabina. | 1. the sizes and numbers of axons in peripheral nerves and spinal roots were investigated in the stingray, dasyatis sabina. 2. the axons of the dorsal and ventral roots do not mingle in peripheral nerves of this animal as they do in higher vertebrates. thus, it was usually possible to split the peripheral nerve into two portions, one containing only dorsal root axons, the other containing only ventral root axons. this feature was useful for the analysis of certain aspects of spinal cord organiza ... | 1978 | 621549 |
| two new species of dendromonocotyle hargis, 1955 (monogenea: monocotylidae) from the skin of taeniura meyeni (dasyatidae) and aetobatus narinari (myliobatidae) from aquaria in queensland, australia. | dendromonocotyle pipinna n. sp. (monogenea: monocotylidae) is described from the dorsal skin surface of taeniura meyeni müller & henle from a public aquarium in mooloolaba, queensland, australia. d. torosa n. sp. was found on the dorsal skin surface of a heavily infected specimen of aetobatus narinari (euphrasen) during a post-mortem at the mooloolaba aquarium and on a specimen of a. narinari kept in an aquarium in cairns. both of these new dendromonocotyle species are distinguished from each ot ... | 2004 | 15010596 |
| six species of acanthobothrium (eucestoda: tetraphyllidea) in stingrays (chondrichthyes: rajiformes: myliobatoidei) from ecuador. | six species of acanthobothrium, 4 described as new, are reported in stingrays from southern ecuador. acanthobothrium atahualpai n. sp. in gymnura afuerae most closely resembles acanthobothrium fogeli and acanthobothrium parviuncinatum by having bothridial hooks with recurved prongs and short handles. it differs from a. fogeli by having bothridial hooks 163-195 microns vs. 78-114 microns long and averaging 25 vs. 32 testes per pruglottis: it differs from a. parviuncinatum by having bothridial hoo ... | 1997 | 9194831 |
| anatomical comparison of the cephalic musculature of some members of the superfamily myliobatoidea (chondrichthyes): implications for evolutionary understanding. | this article describes the anatomy of the dorsal and ventral cephalic musculature of gymnura marmorata, g. micrura, aetobatus narinari, myliobatis californica, m. longirostris, rhinoptera steindachneri, mobula munkiana, and m. thurstoni. it was observed that muscles of the dorsal cephalic region showed little variation among species, with the exception of the dorsal longitudinal bundles and the cucullaris muscle. the ventral cephalic musculature showed wider differences, mainly in the depressor ... | 2003 | 12552642 |
| structure and function of the horn shark (heterodontus francisci) cranium through ontogeny: development of a hard prey specialist. | the horn sharks (heterodontidae: chondrichthyes) represent one of four independent evolutions of durophagy in the cartilaginous fishes. we used high-resolution computed tomography (ct scanning) to visualize and quantify the mineralized tissue of an ontogenetic series of horn sharks. ct scanning of neonatal through adult california horn sharks (heterodontus francisci) confirmed that this technique is effective for examining mineralized tissue in even small (<10 mm) specimens. the jaw joint is amo ... | 2004 | 15052592 |
| nutritional value of various ray fish liver oils to the pacific white shrimp litopenaeus vannamei. | a 32-day comparative feeding trial was performed to evaluate the nutritional value of four different ray fish liver oils to the pacific white shrimp litopenaeus vannamei. four feeds were prepared with liver oil extracted from dasyatis brevis, rhinoptera steindachneri, aetobatus narinari, and r. bonasus. a control feed was prepared with menhaden fish oil. ray fish liver oils were mainly composed of poly- and highly unsaturated fatty acids and contained levels of 20:5n-3 and 22:6n-3 comparable in ... | 2008 | 18807083 |
| species delineation and evolutionary history of the globally distributed spotted eagle ray (aetobatus narinari). | the spotted eagle ray (aetobatus narinari), a large coral reef-associated batoid of conservation concern, is currently described as a single, circumglobally distributed species. however, geographic differences in its morphology and parasite diversity have raised unconfirmed suspicions that a. narinari may constitute a species complex. we used 1570 bp of mitochondrial and nuclear sequence data (cytochrome b, cytochrome c oxidase subunit i, and internal transcribed spacer 2) to assess the validity ... | 2009 | 19304741 |
| the role of olfaction throughout juvenile development: functional adaptations in elasmobranchs. | seven elasmobranch species, a group known for their highly-developed sense of smell, were examined for developmental changes in the number of olfactory lamellae, the size of the surface area of the sensory olfactory epithelium and the mass of both the olfactory rosettes (primary input to the cns), and the olfactory bulbs. within each species, juveniles possessed miniature versions of the adult olfactory organs, visually not distinguishable from these and without any obvious structural difference ... | 2010 | 19941378 |
| a review of the taxonomy of chondrichthyan fishes: a modern perspective. | taxonomic clarity is a fundamental requirement as it forms the foundation of all other life sciences. in the last decade, chondrichthyan taxonomy has undergone a scientific renaissance with >180 new species formally described. this effort encompasses c. 15% of the global chondrichthyan fauna, which consists of 1185 currently recognized species. the important role of chondrichthyan taxonomy for conservation management has been highlighted in recent years with new species descriptions or taxonomic ... | 2012 | 22497367 |
| estimating the potential impacts of large mesopredators on benthic resources: integrative assessment of spotted eagle ray foraging ecology in bermuda. | declines of large sharks and subsequent release of elasmobranch mesopredators (smaller sharks and rays) may pose problems for marine fisheries management as some mesopredators consume exploitable shellfish species. the spotted eagle ray (aetobatus narinari) is the most abundant inshore elasmobranch in subtropical bermuda, but its predatory role remains unexamined despite suspected abundance increases and its hypothesized specialization for mollusks. we utilized a combination of acoustic telemetr ... | 2012 | 22802956 |
| isolation and characterization of hyaluronic acid from the liver of marine stingray aetobatus narinari. | although hyaluronic acid research pursuits ahead in exploring its biomedical perspective, very limited investigations were carried out in their isolation shape view point, furthermore, most of the investigations were targeted towards the terrestrial source. to swerve from that, the present study was projected through the marine superstore, where in high molecular weight hyaluronic acid of 13, 65,863 da was isolated from the liver of stingray aetobatus narinari. the purified ha was confirmed at t ... | 2013 | 23220595 |
| paternity testing using the poisonous sting in captive white-spotted eagle rays aetobatus narinari: a non-invasive tool for captive sustainability programmes. | a group of captive white-spotted eagle rays aetobatus narinari produced 20 offspring, with an unknown father. part of the poisonous sting was removed from each fish and dna was extracted from the epidermis for paternity research using eight microsatellite markers of which four were from another species aetobatus flagellum. this non-invasive sampling technique can be applied on all members of myliobatiformes. | 2013 | 23464564 |
| epitheliocystis hyperinfection in captive spotted eagle rays aetobatus narinari associated with a novel chlamydiales 16s rdna signature sequence. | this report details 2 cases of epitheliocystis in spotted eagle rays aetobatus narinari associated with a novel chlamydiales 16s rdna signature sequence. epitheliocystis is a common disease of variable severity affecting >50 species of wild and cultured freshwater and marine teleosts. disease in elasmobranchs is rarely reported and descriptions are limited. occurring in gill and skin epithelium, lesions are characterized by large hypertrophied cells with basophilic inclusions containing gram-neg ... | 2013 | 23670076 |
| [effect of environmental factors and fishing effort allocation on catch of the spotted eagle ray aetobatus narinari (rajiformes: myliobatidae) in southern gulf of mexico]. | aetobatus narinari represents a fisheries target in southern gulf of mexico, and it is currently considered a near threatened species by the iucn red list. the information available of this batoid fish includes some biological and fishery aspects; nevertheless, little is known about the factors influencing on fishing operations and catches. in order to evaluate the effect of environmental factors and the fishing effort allocation by vessels on the target fishery of a. narinari in this area, a da ... | 2013 | 24027927 |
| dna barcoding of elasmobranchs from indian coast and its reliability in delineating geographically widespread specimens. | identification of elasmobranchs by conventional taxonomy is difficult due to similarities in morphological characters. species-specific molecular markers are good choice for identifying species irrespective of it's life stage. recently, mitochondrial cytochrome c oxidase subunit i (coi) gene got global recognition as a barcode gene to discriminate all animals up-to species level. in this study, mitochondrial coi partial gene was used to develop dna barcodes for 18 species of elasmobranchs (10 sp ... | 2015 | 24041451 |
| the ocellated eagle ray, aetobatus ocellatus (myliobatiformes: myliobatidae), from borneo and northern australia as host of four new species of hornellobothrium (cestoda: lecanicephalidea). | four new species are described in the lecanicephalidean genus hornellobothrium from the ocellated eagle ray, aetobatus ocellatus, from australia and indonesian borneo. the species possess flat, laterally expanded immature proglottids and a small internal, glandular apical organ diagnostic of the genus. to date, only 2 valid species are recognized in the genus: hornellobothrium cobraformis shipley & hornell, 1906 , from " aetobatus narinari " from sri lanka, and hornellobothrium extensivum jensen ... | 2014 | 24512485 |
| management of wounds in a loggerhead sea turtle (caretta caretta) caused by traumatic bycatch injury from the spines of a spotted eagle ray (aetobatus narinari). | a subadult female loggerhead sea turtle (caretta caretta) was caught in a trawl net off the west coast of florida with a spotted eagle ray (aetobatus narinari) spine lodged in the left stifle. surgical removal of the spine was performed and antibiotic treatment was initiated. four weeks later, endoscopy revealed a second spine entering an intestinal lumen. the fistulous tract of the left prefemoral fossa was surgically excised and the intestinal perforation was repaired. dehiscence occurred and ... | 2014 | 25000714 |
| seussapex, a new genus of lecanicephalidean tapeworm (platyhelminthes: cestoda) from the stingray genus himantura (myliobatiformes: dasyatidae) in the indo-west pacific with investigation of mode of attachment. | a new lecanicephalidean genus, seussapex gen. n., is erected for specimens collected from stingrays from the indo-west pacific resembling the little known species tenia [sic] narinari maccallum, 1917 from the spotted eagle ray, aetobatus narinari (euphrasen). members of this new genus are unique in their possession of a multi-tiered apical structure comprising a bipartite apical modification of the scolex proper, and an externally bipartite apical organ with anterior and posterior glandular comp ... | 2014 | 25065129 |
| prey capture kinematics in batoids using different prey types: investigating the role of the cephalic lobes. | cephalic lobes are novel structures found in some myliobatid stingrays. while undulatory batoids utilize the pectoral fins for prey capture and locomotion, lobed species partition locomotion to the pectoral fins, utilizing the lobes exclusively for prey capture. we investigated the use of the anterior pectoral fins and cephalic lobes in prey capture in five batoid species. the purpose of this study was to investigate the: (1) prey capture kinematics and use of the cephalic lobes in lobed and lob ... | 2014 | 25074721 |
| population structure and seasonal migration of the spotted eagle ray, aetobatus narinari. | few studies have reported on the fine-scale population genetics of batoid species in the atlantic basin. here, we investigate the genetic diversity and population structure of the spotted eagle ray, aetobatus narinari, sampled in the northeastern and southwestern parts of the gulf of mexico and in the northwestern caribbean sea. samples were collected from 286 individuals sampled across 3 geographic localities. estimates of divergence based on the mitochondrial cytochrome b gene and 10 nuclear m ... | 2015 | 25825312 |
| consecutive parthenogenetic births in a spotted eagle ray aetobatus narinari. | genetic evidence is given to support consecutive parthenogenesis in a spotted eagle ray aetobatus narinari using nuclear microsatellite genotyping. to date, only a handful of births involving the parthenogenesis process in chondrichthyans have been verified using microsatellite markers and even fewer verified as recurring births. this appears to be the first documented case of this process occurring in a myliobatid species. | 2016 | 26563982 |
| euryphorus suarezi n. sp. (copepoda: caligidae) parasitic on an elasmobranch from the gulf of mexico. | currently, the caligid genus euryphorus milne edwards, 1840 contains two valid species. a new species, euryphorus suarezi, is described based on adult females and males collected from the spotted eagle ray aetobatus narinari (euphrasen) (elasmobranchii: myliobatidae), captured off campeche and tabasco, mexico (southern coast of the gulf of mexico). the new species is mainly distinguished from its congeners by the absence of dorsal plates, the presence of postantennal process, bifurcated maxillul ... | 2016 | 26739291 |
| validation of photo-identification as a mark-recapture method in the spotted eagle ray aetobatus narinari. | the spotted eagle ray aetobatus narinari is characterized by pigmentation patterns that are retained for up to 3·5 years. these pigmentations can be used to identify individuals through photo-identification. only one study has validated this technique, but no study has estimated the percentage of correct identification of the rays using this technique. in order to carry out demographic research, a reliable photographic identification technique is needed. to achieve this validation for a. narinar ... | 2017 | 27885667 |
| thaumatocotyle pseudodasybatis hargis, 1955 (monogenea: monocotylidae) from aetobatus cf. narinari, with a comparison of specimens from australia, french polynesia and new caledonia. | thaumatocotyle pseudodasybatis hargis, 1955, has previously been described from aetobatus narinari in the atlantic and subsequently recorded from the pacific. aetobatus cf. narinari is now considered a species complex; as monocotylids are often strictly species specific, we test the hypothesis that detailed examination of specimens of monocotylids from rays from various localities could reveal morphological differences and eventually help our understanding of the systematics of the host. t. pseu ... | 2006 | 16612660 |
| structural composition and differential anticoagulant activities of dermatan sulfates from the skin of four species of rays, dasyatis americana, dasyatis gutatta, aetobatus narinari and potamotrygon motoro. | we compared the disaccharide composition of dermatan sulfate (ds) purified from the ventral skin of three species of rays from the brazilian seacoast, dasyatis americana, dasyatis gutatta, aetobatus narinari and of potamotrygon motoro, a fresh water species that habits the amazon river. ds obtained from the four species were composed of non-sulfated, mono-sulfated disaccharides bearing esterified sulfate groups at positions c-4 or c-6 of n-acetyl galactosamine (galnac), and disulfated disacchari ... | 2004 | 15556278 |
| clemacotyle australis (monogenea: monocotylidae) from the white-spotted eagle ray aetobatus narinari (rajiformes: myliobatididae) on the great barrier reef: redescription, emended generic diagnosis, and oncomiracidium. | clemacotyle australis young, 1967 from the branchial cavity of the type host, aetobatis narinari, is redescribed based on new material from the type locality, heron island, queensland, australia. the generic diagnosis is emended to include details of the male copulatory complex. oncomiracidia, hatched from eggs collected from c. australis, are noteworthy in the presence of diffuse pigment throughout the body and haptor. | 1995 | 7623206 |
| the microscopic anatomy of the caudal appendage of the spotted eagleray, aëtobatus narinari (euphrasen), with special reference to the venom apparatus. | | 1953 | 13016997 |
| acanthobothrium nicoyaense n. sp. (eucestoda: tetraphyllidea: onchobothriidae) in aetobatus narinari (euphrasen) (chondrichthyes: myliobatiformes: myliobatidae) from the gulf of nicoya, costa rica. | a new species of acanthobothrium in aetobatus narinari from the gulf of nicoya, costa rica, most closely resembles acanthobothrium colombianum in the same host and a. urotrygoni in urotrygon venezuelae from cartagena, colombia, by having relatively few proglottides per strobila, spinose cephalic peduncles, bothridial margins free at their posterior ends, and irregularly shaped rather than spherical or elongate cirrus sacs. acanthobothrium colombianum differs from the new species by being as much ... | 1995 | 7707201 |