Αποτελέσματα Αναζήτησης
Gain familiarity with the basic regions of the vertebrate skull—neurocranium, splanchnocranium, dermatocranium. Identify the basic components of the shark chondrocranium. Identify the elements of the fish head listed below and recognize the skull region to which each element belongs.
The size, shape, and placement of the mouth, combined with the type of teeth, provide critical information about the feeding habits of a fish (Table 4.11). For example, a fish with a mouth on the bottom of its head often feeds by digging in the bottom sediment (Fig. 4.28 A).
The head of a fish includes the snout, from the eye to the forward most point of the upper jaw, the operculum or gill cover (absent in sharks and jawless fish), and the cheek, which extends from eye to preopercle. The operculum and preopercle may or may not have spines.
The head of a fish includes the snout, from the eye to the forwardmost point of the upper jaw, the operculum or gill cover, and the cheek, which extends from eye to preopercle. The lower jaw defines a chin.
The body of a fish is divided into a head, trunk and tail, although the divisions between the three are not always externally visible. The skeleton, which forms the support structure inside the fish, is either made of cartilage (cartilaginous fish) or bone (bony fish).
SPECIFIC OBJECTIVES. describe the six basic categories of fish body shape. differentiate the different types of scales and which belong to which fish. describe the purpose of each fish fin and how fins play an important role in fish ecology. differentiate the function of white vs. red muscle.
22 Ιουλ 2020 · Here, we study patterns of habitat-mediated body shape diversification across 3344 species of marine teleosts. We explore the effects of the habitat gradient on the average fish shape, overall phenotypic disparity and on the underlying rate of evolution of body shape.
