Download Grzimek's Animal Life Encyclopedia Fishes by Michael Hutchins PDF

By Michael Hutchins

Gale proudly offers the 1st thoroughly revised and up-to-date model of this acclaimed set in 30 years. a few reviewers name Grzimek's Animal lifestyles Encyclopedia the simplest reference paintings on animals ever released. Others name it the legacy left to us through famed zoologist and animal lover, Bernhard Grzimek. The accolades and compliment cross on for the latest addition to Gale's line of reference titles. the unique 13-vol. set, released in Germany within the past due Sixties, is across the world well known for its medical reporting, assurance and illustrations, and serves as a tremendous element of reference for researchers and scholars learning the animal nation. Thorough articles familiarize readers with animals came upon all over at the globe, detailing their lifestyles cycles, predators, nutrients platforms, total ecology and masses extra. Staying actual to the unique clinical pedigree, Gale enlisted well-known advisors and members from the foreign medical group to include contemporary advancements within the animal global. Our new variations of Grzimek's Animal existence Encyclopedia are bound to serve the desires of scholars at each educational point.

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Extra info for Grzimek's Animal Life Encyclopedia Fishes

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A striking example of a high-velocity feeding event involving extremely mobile jaws is illustrated by the slingjaw wrasse (Epibulus insidiator), aptly named for its ability to sling its jaws away from the rest of its head during the capture of evasive prey. This mechanism allows the rest of the body to remain still, minimizing the chances of being detected by the prey. An alternative strategy is seen in fishes that eat hard prey, such as mollusks, including the sheepshead (Archosargus). These fish do not feed on evasive prey, and so they do not need high-velocity jaw movements; instead, they maximize the force for crushing Opercle Neurocranium Hyomandibula Vomer Palatine Maxilla Premaxilla Dentary Hyoid Articular Quadrate Subopercle Interopercle Angular Vomero-interopercular ligament Premaxillary-maxilla ligament Interoperculo-mandibular ligament The slingjaw wrasse, Epibulus insidiator, has the greatest jaw protrusion known among fishes.

There are a large number of fossil Triassic and Cretaceous teleosts, many with uncertain phylogenetic relationships, and four modern lineages of teleosts: Osteoglossomorpha, Elopomorpha, Clupeomorpha, and Euteleostei. The osteoglossomorphs are distinguished in that the primary jaw teeth are located on the parasphenoid bone along the middle of the roof of the mouth and on the tongue. In addition, the caudal fin skeleton is very specialized. The taxon includes Osteoglossidae (bony tongues), Hiodontids (mooneyes), Notopteridae (featherfin knifefishes), and Mormyridae (elephantfishes).

By definition, parthenogenetic reproduction involves complete development of an egg without fertilization by a sperm of the same species. A variation on this type of reproduction exists in fishes. In fishes, mating with a heterospecific or conspecific male is required. The role of the male is in providing an active sperm, which comes in contact with the egg but which does not penetrate the egg membrane (chorion). The sperm acts as a stimulus for the egg to begin developing. The sperm does not contribute to the genetic makeup of the resulting fry.

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