White Crappie ( Pomoxis annularis ) latency period following hormone administration is predictable and independent of diel injection time

2020 ◽  
Author(s):  
Christian A. Shirley ◽  
Peter J. Allen
Keyword(s):  
Latency Period ◽  
Injection Time ◽  
White Crappie ◽  
Hormone Administration ◽  
Pomoxis Annularis

A New View of the Predation Cycle of a Planktivorous Fish, White Crappie (Pomoxis annularis)

1986 ◽  
Vol 43 (10) ◽  
pp. 1894-1899 ◽  
Author(s):  
W. John O'Brien ◽  
Barbara I. Evans ◽  
Gregory L. Howick
Keyword(s):  
Prey Item ◽  
Search Time ◽  
Handling Time ◽  
Planktivorous Fish ◽  
Present Evidence ◽  
White Crappie ◽  
Wide Range ◽  
Pomoxis Annularis ◽  
Prey Items ◽  
Predation Cycle

Predators are often categorized as either cruise or ambush feeding strategists. We present evidence that white crappie (Pomoxis annularis) are neither. Instead, the crappie swim intermittently and search only when stationary. If the crappie searched while swimming, one would expect the run speeds to be slower than the pursuit speeds, but no difference was found between these two measurements. Assuming that prey are located while swimming, a foreshortening of runs prior to pursuit would also be expected, but again, none was detectable. The duration of the search pause appears to be related to the detectability of the prey. Crappie also search during the pause immediately following the attack and ingestion of a prey item. The observation that the probabilities of detecting and pursuing a prey following a run or an attack do not differ significantly supports this conclusion. Also, the duration of the pause following a run or attack does not differ significantly over a wide range of temperatures. If these views are correct, white crappie could not forage optimally by either deleting located prey items from the diet or minimizing handling time. What they appear to be doing is creatively managing their search time.

On Nesting of the White Crappie, Pomoxis annularis

Copeia ◽  
1943 ◽  
Vol 1943 (4) ◽  
pp. 259 ◽  
Author(s):  
Donald F. Hansen
Keyword(s):  
White Crappie ◽  
Pomoxis Annularis

scholarly journals Biology of the White Crappie in Illinois

1951 ◽  
Vol 25 (1-6) ◽  
pp. 211-265
Author(s):  
Donald F. Hanson
Keyword(s):  
The State ◽  
White Crappie ◽  
Artificial Lakes ◽  
Pomoxis Annularis

The white crappie, Pomoxis annularis Rafinesque, and the black crappie, Pomoxis nigro-maculatus (Le Sueur), are among the most characteristic and abundant fishes of the lakes and streams of Illinois. They are popular with Illinois anglers and are generally ranked with the better food fishes of the state. Both species have been used extensively for stocking artificial lakes of various sizes. This paper is based largely on white crappie studies carried on by the writer at Lake Decatur, Macon County, Illinois, during the period beginning in late November, 1935, and ending in early December, 1939. Most of the fish for the Lake Decatur studies were caught in hoop nets that were operated at 1- to 2-month intervals at all seasons of the year.

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