Spawning Behavior of Etheostoma zonale (Pisces: Percidae)

Copeia ◽  
1994 ◽  
Vol 1994 (3) ◽  
pp. 818 ◽  
Author(s):  
Jody P. Walters
Keyword(s):  
Spawning Behavior ◽  
Etheostoma Zonale

Influences of Anadromous Spawning Behavior and Optimal Environmental Conditions Upon Striped Bass (Morone saxatilis) Year-Class Success

1980 ◽  
Vol 37 (2) ◽  
pp. 143-154 ◽  
Author(s):  
R. E. Ulanowicz ◽  
T. T. Polgar
Keyword(s):  
Striped Bass ◽  
Environmental Conditions ◽  
Transport Model ◽  
Transition Probabilities ◽  
Morone Saxatilis ◽  
Spawning Behavior ◽  
Two Factors ◽  
Model Year ◽  
Eggs And Larvae ◽  
Potomac Estuary

An analysis of the spatial and temporal abundance patterns of developing striped bass (Morone saxatilis) ichthyoplankton stages in the Potomac Estuary, including a Markovian description of transport, indicates that annual differences in the distribution of spawning fish are not likely to account wholly for the wide fluctuations in year-class success. Year-class success can be decomposed into the product of two factors — one extrinsic, acting upon the eggs and larvae, and the other, a behavioral property of the adult stock. The effect of extrinsic environmental conditions upon year-class success can be measured relative to the maximum computed survival of eggs to post-finfold larvae among all locations and times during a given year. Apparently, the behavior of the spawning adult fish is not well matched with the environmental conditions favorable to ichthyoplankton survival, and therefore, the actual spawning distribution yields only a fraction (the spawning fitness) of the maximum production possible during that year. Spawning fitnesses were estimated to be small (< 0.02 out of 1.0) and varied by less than a factor of two over the three seasons observed. In contrast, the year-class success as measured by post-finfold production differed 35-fold over the same 3 yr. It appears most likely that the large range in success is due primarily to the extrinsic, density-independent environmental factors which determine the optimum survivals in combination with spawning behavior. However, no strong case can be made for behavioral compensation by spawning fish to offset changes in the annual optimum survival conditions for ichthyoplankton.Key words: anadromous, ichthyoplankton development, Markovian transition probabilities, optimal survival, spawning behavior, spawning fitness, striped bass, transport model, year-class success

Field Observations on Courtship and Spawning Behavior of the Giant Sea Bass,Stereolepis gigas

Copeia ◽  
2018 ◽  
Vol 106 (1) ◽  
pp. 171-179 ◽  
Author(s):  
Brian L. F. Clark ◽  
Larry G. Allen
Keyword(s):  
Sea Bass ◽  
Field Observations ◽  
Spawning Behavior

scholarly journals Close-up observations on the spawning behavior of a captive Japanese flying squid (Todarodes pacificus)

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jun Yamamoto ◽  
Kohsuke Adachi ◽  
John R. Bower ◽  
Hajime Matsui ◽  
Mitsuhiro Nakaya ◽  
...  
Keyword(s):  
The Body ◽  
Egg Mass ◽  
Spawning Behavior ◽  
Contraction Rate ◽  
Todarodes Pacificus ◽  
Close Observation

AbstractThe spawning behavior of a Japanese flying squid (Todarodes pacificus) is described based on up-close observation of a captive female. The squid was first transferred from a 10-ton tank to a polystyrene plastic box containing 45 liters of seawater. About one hour later, the mantle-contraction rate increased rapidly, followed by a brief convulsion of the mantle and arms and a whitening of the body. The mantle contractions become shallow and rapid, and several seconds later, semitransparent jelly presumably from the nidamental glands emerged from the funnel and passed between the ventral pair of arms. Approximately 90 seconds after the egg mass first emerged, the female began ejecting oocytes through the funnel into the egg mass using rapid, powerful mantle contractions. Soon after the oocytes were ejected, translucent strands (presumably sperm) emanated from the buccal membrane. The female continued to eject oocytes for approximately two minutes, after which the mantle convulsed, and the mantle-contraction rate decreased slowly for about one minute until the contractions stopped. The squid died soon afterwards.

Sign in / Sign up

Export Citation Format

Share Document