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The primary unit of measurement for spine is deflection in thousandths of an inch (a deflection of 500 equals 0.500 in or 12.7 mm) Deflection is sometimes converted to pounds of bow weight by dividing 26 by the deflection in inches. (26 in⋅lb divided by 0.500 in equals a spine of 52 lb) [23]
Modern compound bows are typically equipped with substantially stiffer arrows than an equivalent draw-length and draw-weight recurve bow would be. Another advantage of the center-shot riser is that the arrow need not bend around the riser (nearly as much or at all) during the shot. Fine-tuning may be accomplished by adjustment of the arrow rest ...
Several species of deep-sea fish have luminous organs used to attract prey. Females of the genus Linophryne bear barbels containing luminous organs in addition to an escal light organ attached to the head. In L. arborifera, the top light organ has been likened to a pearl onion and contains luminous bacteria. The barbels, which look like seaweed ...
The polka-dot batfish is a bottom-dwelling fish that can measure up to 380 mm (15 in) from head to tail. It is a broad, dorso-ventrally flattened, arrow-shaped fish similar in appearance to a ray . The pelvic fins are located further forward than the broad, pectoral fins which flare out on both sides, supported by arm-like stalks.
Ceratioidei, the deep-sea anglerfishes or pelagic anglerfishes, is a suborder of marine ray-finned fishes, one of four suborders in the order Lophiiformes, the anglerfishes.
The bullrout is big headed with bony ridges, [9] a large mouth and a lower jaw which protrudes beyond the upper jaw. There are 7 spines on the operculum. [10] There are 15 robust spines in the dorsal fin [11] and this part of dorsal fin is slightly concave towards the rear with the rearmost soft ray in the dorsal fin being attached to the caudal peduncle by a membrane.
Actinopterygii (/ ˌ æ k t ɪ n ɒ p t ə ˈ r ɪ dʒ i aɪ /; from Ancient Greek ἀκτίς (aktis) 'having rays' and πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish [2] that comprise over 50% of living vertebrate species. [3]
Muskellunge are found in oligotrophic and mesotrophic lakes and large rivers from northern Michigan, northern Wisconsin, and northern Minnesota through the Great Lakes region, Chautauqua Lake in western New York, north into Canada, throughout most of the St Lawrence River drainage, and northward throughout the upper Mississippi valley, although the species also extends as far south as ...