Search results
Results From The WOW.Com Content Network
Perch have a long and round body shape which allows for fast swimming in the water. True perch have "rough" or ctenoid scales. Perch have paired pectoral and pelvic fins, and two dorsal fins, the first one spiny and the second soft. These two fins can be separate or joined. [6]
The age of the perch is highly based on the condition of the lake. Most research has shown the maximum age to be approximately 9–10 years, with a few living past 11 years. Yellow perch have been proven to grow the best in lakes where they are piscivorous due to the lack of predators. Perch do not perform well in cold, deep, oligotrophic lakes ...
The adipose fin is a soft, fleshy fin found on the back behind the dorsal fin and just forward of the caudal fin. It is absent in many fish families, but found in nine of the 31 euteleostean orders ( Percopsiformes , Myctophiformes , Aulopiformes , Stomiiformes , Salmoniformes , Osmeriformes , Characiformes , Siluriformes and Argentiniformes ...
The pelvic fins are placed on the thorax and have a single spine and 5 soft rays. They also have skeletal synapomorphies . [ 3 ] The maximum size attained is 100 centimetres (39 in) in the zander ( Sander lucioperca ) [ 4 ] but most of the species in the family are much smaller. [ 3 ]
The vomerine teeth are arranged a crescent shape with no rearwards extension and there are no teeth on the smooth tongue. [5] The dorsal fin contains 11 spines and 12-14 soft rays and the anal fin has 3 spines and 8-9 soft rays. [2] The long pectoral fins extend to the level of the anus and contains 17 rays. The caudal fin is truncate. [5]
The dorsal fin has 10 spines and 12-14 soft rays while the anal fin contains 3 spines and 8 soft rays. [2] The rear part of the dorsal and anal fins vary in shape from rounded to rather angular. The pectoral fins contain 15 to 17 rays and the caudal fin can be truncate or slightly emarginate. [6]
Pacific ocean perch is a very slow-growing species, with a low rate of natural mortality (estimated at 0.06), a relatively old age at 50% maturity (10.5 years for females in the Gulf of Alaska), and a very old maximum age of 98 years in Alaska (84 years maximum age in the Gulf of Alaska). [25]
The dorsal fin has 10 spines and 13–14 soft rays while the anal fin contains 3 spines and 8 soft rays. [2] The rear of the dorsal fin and the anal fin are rounded, the pectoral fins have 16 rays and the caudal fin is truncate or weakly emarginate. [5] This fish attains a maximum total length of 60 cm (24 in), although 35 cm (14 in) is more ...