Development of Cephalic Muscles in Chondrichthyans and Bony Fishes

2018 ◽  
pp. 113-120
Author(s):  
Rui Diogo ◽  
Janine M. Ziermann ◽  
Julia Molnar ◽  
Natalia Siomava ◽  
Virginia Abdala
Keyword(s):  
Bony Fishes

Soft-rayed Bony Fishes: Orders Isospondyli and Giganturoidei

2018 ◽  
Author(s):  
HENRY B. BIGELOW ◽  
DANIEL M. COHEN ◽  
MYVANWY M. DICK ◽  
ROBERT H. GIBBS ◽  
MARION GREY ◽  
...  
Keyword(s):  
Bony Fishes

IX.—The Postcranial Skeleton of Ensthenopteron foordi Whiteaves

1970 ◽  
Vol 68 (9) ◽  
pp. 207-329 ◽  
Author(s):  
S. Mahala Andrews ◽  
T. Stanley Westoll
Keyword(s):  
Functional Analysis ◽  
Postcranial Skeleton ◽  
Bony Fishes ◽  
Mode Of Life

SynopsisWell preserved material of the crossopterygian fish Eusthenopteron enables fresh reconstructions and interpretations of its postcranial skeleton to be given. Comparisons throughout with other bony fishes show that it may be primitive in many features. Similarities with early amphibians such as the screw-shaped glenoid, the form of the humerus (on which an attempt to restore the pectoral musculature is based), the dorsal bicipital ribs and the possibility of a sacral attachment, throw much light on the origin of the tetrapod postcranial skeleton, particularly of the cheiropterygium. A functional analysis of the skeleton of Ensthenopteron is attempted, suggesting that it resembled the pike (Esox) in its mode of life and that it may have been capable of short journeys “walking” overland. The possible selective factors stimulating the evolution of such a fish, and further evolution to the tetrapod stage are discussed.

scholarly journals Phylogenetic classification of bony fishes

2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Ricardo Betancur-R ◽  
Edward O. Wiley ◽  
Gloria Arratia ◽  
Arturo Acero ◽  
Nicolas Bailly ◽  
...  
Keyword(s):  
Phylogenetic Classification ◽  
Bony Fishes

Food of striped dolphin, Stenella coeruleoalba, in the Ligurian Sea

1993 ◽  
Vol 73 (3) ◽  
pp. 571-578 ◽  
Author(s):  
M. Würtz ◽  
D. Marrale
Keyword(s):  
Mediterranean Sea ◽  
Western Mediterranean ◽  
Important Food ◽  
Ligurian Sea ◽  
Stenella Coeruleoalba ◽  
Striped Dolphin ◽  
Western Mediterranean Sea ◽  
Bony Fishes ◽  
Food Species ◽  
Ligurian Coast

The stomachsof 23 striped dolphins (Stenella coeruleoalba Meyen, 1833, Cetacea), stranded along the Ligurian coast (western Mediterranean Sea), contained 32 species of cephalopods, crustaceans and fishes, totalling an estimated 2,723 prey specimens representing about 36 kg in weight. Cephalopods and bony fishes were equally important in the diet (50%). Todarodes sagittatus (34.5%) and Micromesistius poutassou (25.9%) were found to be the most important food species. Other species belonging to six cephalopod families, three crustacean families and nine bony fish families, contributed to the diet with variable numbers, weights, and occurrences, demonstrating the opportunistic character of striped dolphin feeding.

scholarly journals Diet of three shark species in the Ecuadorian Pacific, Carcharhinus falciformis, Carcharhinus limbatus and Nasolamia velox

2017 ◽  
Vol 98 (4) ◽  
pp. 927-935 ◽  
Author(s):  
Colombo Estupiñán-Montaño ◽  
Fabian Pacheco-Triviño ◽  
Luis G. Cedeño-Figueroa ◽  
Felipe Galván-Magaña ◽  
Jose F. Estupiñán-Ortiz
Keyword(s):  
Stomach Contents ◽  
Thunnus Albacares ◽  
Shark Species ◽  
Dosidicus Gigas ◽  
Katsuwonus Pelamis ◽  
Carcharhinus Limbatus ◽  
Lack Of Information ◽  
Bony Fishes ◽  
Carcharhinus Falciformis ◽  
Conservation Plans

We analysed the stomach contents of 69 silky sharks Carcharhinus falciformis, 44 blacktip sharks Carcharhinus limbatus and 24 whitenose sharks Nasolamia velox caught in the Ecuadorian Pacific from August 2003 to December 2004. Prey included bony fishes, elasmobranchs, molluscs, crustaceans and turtles, with bony fishes being the most important to the diets of all three sharks, suggesting they are piscivorous predators. Based on the index of relative importance, the C. falciformis diet includes Thunnus albacares, Thunnus sp. and Auxis thazard, as well as some squid, fish and turtles. Similarly, the C. limbatus diet was dominated by T. albacares, Exocoetus monocirrhus, A. thazard, Katsuwonus pelamis, members of the Ophichthidae family and other elasmobranchs. Meanwhile, N. velox consumed mainly Dosidicus gigas, Larimus argenteus, Cynoscion sp. and Lophiodes spilurus. There is little competition for food between these tertiary carnivores: C. limbatus prefers prey from coastal-oceanic habitats; C. falciformis consumes mostly oceanic prey and N. velox focuses on prey from coastal habitats. The lack of information on the biology of sharks in Ecuador hinders the development of appropriate management and conservation plans to protect shark resources. This study increases our knowledge and understanding of sharks in Ecuador, thus contributing to their conservation.

Adaptive radiation of the comatulid crinoids

Paleobiology ◽  
1977 ◽  
Vol 3 (1) ◽  
pp. 74-82 ◽  
Author(s):  
David L. Meyer ◽  
Donald B. Macurda
Keyword(s):  
Habitat Selection ◽  
Shallow Water ◽  
Adaptive Radiation ◽  
Late Mesozoic ◽  
Behavioral Adaptations ◽  
Bony Fishes ◽  
Survival Capacity ◽  
Stalked Crinoids ◽  
Permanent Fixation

Modern crinoids are dominated by the comatulids (unstalked forms) which range from the intertidal to abyssal depths. Modern stalked crinoids are restricted to depths greater than about 100 m. In the geologic past some stalked crinoids lived at depths of a few tens of meters or less in reef and bank environments. The primary vehicles postulated for the post-Triassic radiation of comatulids are lack of permanent fixation to the substratum and the capacity for mobility. Development of complex muscular articulations has enabled crawling or swimming which serve in habitat selection and avoidance of stress and predators. These and other adaptations may have bestowed on comatulids a higher survival capacity in shallow-water environments compared to stalked crinoids. Modern stalked crinoids lack mobility and complex behavioral adaptations seen in comatulids. Possibly, stalked crinoids in shallow water were unable to cope with the radiation of abundant, predaceous bony fishes in the late Mesozoic and became restricted to greater depths while the more adaptable comatulids gained ascendancy in shallow water.

scholarly journals Cartilaginous fishes (Class Chondrichthyes) from the Ichthyological Collection at the Federal University of Paraíba, Brazil

2020 ◽  
Vol 27 (1) ◽  
Author(s):  
Sarah TFL Viana ◽  
Danilo Lima ◽  
Katherine Viana ◽  
Antônio Felinto ◽  
Ricardo de Souza Rosa
Keyword(s):  
Fish Fauna ◽  
Public Consultation ◽  
Type Collection ◽  
Neotropical Fish ◽  
Full List ◽  
Bony Fishes ◽  
Fish Collection ◽  
Cartilaginous Fishes ◽  
Geographical Scope ◽  
Amazonian Region

Federal University of Paraíba (UFPB) ichthyological collection comprises over 11,000 lots of species of cartilaginous and bony fishes from marine, estuarine and freshwater realms. Due to the collection size, rarity of some specimens, taxonomic and geographical scope, this collection represents a substantial archive of the Neotropical fish fauna, especially concerning the Northeast Brazilian region. Currently, UFPB fish collection is under bioinformatization and curatorial transitions. Hence, the present study aimed to provide a detailed analysis of the Chondrichthyan collection database in which the systematic, spatial and chronological coverages are discussed. Full list of collection objects, updated nomenclature and type collection extent are given for public consultation. There are 504 lots of sharks, batoids and chimaeras that are classified within 10 orders, 22 families, 34 genera, and 64 species. Myliobatiformes and Carcharhiniformes represent taxa with higher number of lots in which freshwater stingrays (Potamotrygonidae) and requiem sharks (Carcharhinidae) stand out. Specimens were mostly collected in the marine coastline off Paraíba state and lower Amazonian region, which set UFPB fish collection as an outstanding scientific collection of the regional genetic heritage. 

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