Phocid pinnipeds
Webb1 jan. 2024 · Phocids lack the ability to rotate their feet under their body and move along the ground with undulatory movements of the body, dragging their feet behind them. Externally, the hindlimbs of pinnipeds extend beyond the body contour from the approximate middle or end of the crus (the segment of the limb that includes the tibia). WebbPhocidae Earless seals, also called “true seals" or "phocids", are the most diverse and widespread pinnipeds. They lack external ears, have more streamlined snouts, and are generally more aquatically adapted than otariids. They swim with efficient, undulating whole-body movements using their more-developed rear flippers.
Phocid pinnipeds
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Pinnipeds , commonly known as seals, are a widely distributed and diverse clade of carnivorous, fin-footed, semiaquatic, mostly marine mammals. They comprise the extant families Odobenidae (whose only living member is the walrus), Otariidae (the eared seals: sea lions and fur seals), and Phocidae (the earless … Visa mer The name "pinniped" derives from the Latin words pinna "fin" and pes, pedis "foot". The common name "seal" originates from the Old English word seolh, which is in turn derived from the Proto-Germanic *selkhaz. Visa mer Pinnipeds have streamlined, spindle-shaped bodies with reduced or non-existent external ear flaps, rounded heads, flexible necks, limbs modified into flippers, and small tails. Pinniped skulls have large eye orbits, short snouts and a constricted interorbital region. … Visa mer Living pinnipeds mainly inhabit polar and subpolar regions, particularly the North Atlantic, the North Pacific and the Southern Ocean. They are entirely absent from Indomalayan waters. Monk seals and some otariids live in tropical and subtropical waters. … Visa mer Cultural depictions Various human cultures have for millennia depicted pinnipeds. The anthropologist, A. Asbjørn Jøn, has … Visa mer Taxonomy The German naturalist Johann Karl Wilhelm Illiger was the first to recognize the pinnipeds as a … Visa mer Pinnipeds have an amphibious lifestyle; they spend most of their lives in the water, but haul out to mate, raise young, molt, rest, thermoregulate or escape from aquatic predators. Several species are known to migrate vast distances, particularly in response to extreme … Visa mer As of 2024, the International Union for Conservation of Nature (IUCN) recognizes 36 pinniped species. With the Japanese sea lion and the Caribbean monk seal recently extinct, ten … Visa mer Webb27 sep. 2024 · In spite of that, to date, the only pinniped herpesviruses recognized by the International Committee on Taxonomy of Viruses (ICTV) are the alphaherpesvirus Phocid alphaherpesvirus 1, and the gammaherpesviruses Phocid gammaherpesvirus 2 and Phocid gammaherpesvirus 3 —the last two corresponding to herpesvirus species initially …
Webb3 apr. 2024 · Pinnipeds have a significant impact on marine ecosystems (Bowen, 1997; Heithaus ... and Thomas et al. suggested that a diverse diet and regional and seasonal differences in the diet of Phocid seals were related to the ease of feeding due to the seasonal distribution and abundance of their principal prey species . Spotted ... Webb开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆
Webb1 jan. 2024 · Pinnipeds are members of the mammalian order Carnivora and include … WebbThis study shows clearly that the isolates obtained from pinnipeds represent a novel …
Webb18 mars 2024 · Phocid seals exhibit the complete range of breeding systems observed …
Webb1 sep. 1999 · This order comprises three families: Otariidae, Phocidae, and Odobenidae. … great investWebbMales reach about 3.6 m and 880–1560 kg, females about 3 m and 580–1039 kg. Newborns are 1–1.4 m and weigh 33–85 kg. The dental formula is: I 1/0, C 1/1, PC 3/3. Walruses are unique among pinnipeds, as the upper canine teeth develop into tusks that grow throughout life. floating mcdonald\\u0027s in canadaWebb1 jan. 2006 · The phocid (true seals) and otarioid (walruses and sea lions) pinnipeds now seem to have relatively early origins, the phocids in the Late Oligocene, and the otarioids in the Early Oligocene. great inverted snub icosidodecahedronWebbThirty-five living and recently extinct species of pinnipeds are distributed throughout the world: 19 phocids, 15 otariids, and the walrus. Included in this count is one species of phocid (Caribbean monk seal) and one species of otariid (Japanese sea lion) that have been classified as being extinct in historical time during recent decades. great inventors of all timeWebb11 apr. 2024 · Pinnipeds may increase their haulout time, possibly to avoid in-water disturbance (Thorson and Reyff, 2006). If a marine mammal responds to a stimulus by changing its behavior (e.g., through relatively minor changes in locomotion direction/speed or vocalization behavior), the response may or may not constitute taking at the individual … great inversionWebb31 mars 2024 · Pinnipeds are comprised of about 34 species, and of those at least 25% live permanently in tropical zones. This book reviews and updates current research on the biology, marine ecology, bio-monitoring, and conservation of tropical pinniped populations, including their behavior, anthropogenic stressors, and health. great investigation vbsWebb9 dec. 2015 · Pinnipeds are therefore an interesting comparative system for investigating … great investigacion y asesoria