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The word taxidermy describes the process of preserving the animal, but the word is also used to describe the end product, which are called taxidermy mounts or referred to simply as "taxidermy". [ 1 ] The word taxidermy is derived from the Ancient Greek words τάξις taxis (order, arrangement) and δέρμα derma (skin). [ 2 ]
Most male fish have two testes of similar size. In the case of sharks, the testes on the right side is usually larger [citation needed].The primitive jawless fish have only a single testis, located in the midline of the body, although even this forms from the fusion of paired structures in the embryo.
Jessiko robot fish on France Pavilion at Yeosu 2012 World Expo. A robot fish is a type of bionic robot that has the shape and locomotion of a living fish.Most robot fish are designed to emulate living fish which use body-caudal fin (BCF) propulsion, and can be divided into three categories: single joint (SJ), multi-joint (MJ) and smart material-based "soft-body" design.
The grunt sculpin or grunt-fish (Rhamphocottus richardsonii) is a small fish mainly found in the eastern Pacific Ocean. [2] The grunt sculpin generally remains close to shore and is often found in empty giant barnacle shells. The common name comes from reports that the fish vibrate or "grunt" when held. [3]
Many pollutants, such as heavy metals, organochlorines, and carbamates interfere with teleost reproduction, often by disrupting their endocrine systems. In the roach , river pollution has caused the intersex condition, in which an individual's gonads contain both cells that can make male gametes (such as spermatogonia ) and cells that can make ...
Diagram of spray-up process. Spray-Up also known as chop method of creating fiberglass objects by spraying short strands of glass out of a pneumatic gun. This method is used often when one side of the finished product is not seen, or when large quantities of a product must be made cheaply and quickly with moderate strength requirements. [1]
As documented in Frederick H. Hitchcock's 19th-century manual entitled Practical Taxidermy, the earliest known taxidermists were the ancient Egyptians and despite the fact that they never removed skins from animals as a whole, it was the Egyptians who developed one of the world's earliest forms of animal preservation through the use of injections, spices, oils, and other embalming tools. [3]
Rhenanida ("Rhine fish") were flattened, ray-like, bottom-dwelling predators with large, upturned mouths that lived in marine environments. The rhenanids were once presumed to be the most primitive, or at least the closest to the ancestral placoderm, as their armour was made of unfused components—a mosaic of tubercles—as opposed to the ...