scholarly journals Flexible mate choice may contribute to ecotype assortative mating in pumpkinseed sunfish (Lepomis gibbosus)

2017 ◽  
Vol 30 (10) ◽  
pp. 1810-1820 ◽  
Author(s):  
W. M. C. Jarvis ◽  
S. M. Comeau ◽  
S. F. Colborne ◽  
B. W. Robinson
Keyword(s):  
Mate Choice ◽  
Assortative Mating ◽  
Lepomis Gibbosus ◽  
Pumpkinseed Sunfish

Ecomorphological variation of pumpkinseed sunfish (Lepomis gibbosus) in exposed littoral shoreline habitat of a postglacial lake

2021 ◽  
Author(s):  
Will M. C. Jarvis ◽  
Colby B. Nolan ◽  
Beren W. Robinson
Keyword(s):  
Lepomis Gibbosus ◽  
Pumpkinseed Sunfish

Individual variation in learning by foraging pumpkinseed sunfish, Lepomis gibbosus: the influence of habitat

1991 ◽  
Vol 41 (4) ◽  
pp. 603-611 ◽  
Author(s):  
James D. Kieffer ◽  
Patrick W. Colgan
Keyword(s):  
Individual Variation ◽  
Lepomis Gibbosus ◽  
Pumpkinseed Sunfish

Optimistic Growth: Competition and an Ontogenetic Niche-Shift Select for Rapid Growth in Pumpkinseed Sunfish (Lepomis gibbosus)

Evolution ◽  
1997 ◽  
Vol 51 (6) ◽  
pp. 1946 ◽  
Author(s):  
Jeffrey D. Arendt ◽  
David S. Wilson
Keyword(s):  
Rapid Growth ◽  
Niche Shift ◽  
Lepomis Gibbosus ◽  
Pumpkinseed Sunfish ◽  
Ontogenetic Niche Shift ◽  
Ontogenetic Niche

Effect of stimulus train duration and cycle frequency on the capacity to do work in the pectoral fin muscle of the pumpkinseed sunfish, Lepomis gibbosus

1993 ◽  
Vol 71 (11) ◽  
pp. 2185-2189 ◽  
Author(s):  
Eric A. Luiker ◽  
E. Don Stevens
Keyword(s):  
Duty Cycle ◽  
Length Change ◽  
Lepomis Gibbosus ◽  
Pectoral Fin ◽  
Cycle Frequency ◽  
Pumpkinseed Sunfish ◽  
Train Duration ◽  
Stimulus Train ◽  
Length Changes ◽  
Time Required

The goal of our experiment was to elucidate the effect of stimulus duty cycle (the percentage of the cycle that the muscle was stimulated), phase (the relative timing of the imposed sinusoidal length change and stimulation), and muscle cycle frequency (the speed at which the muscle was cycled) on work and power in the pectoral fin muscle of a labriform swimmer, the pumpkinseed sunfish, Lepomis gibbosus. Stimulus train duration was varied from a twitch to a 40% duty cycle; cycle frequency was varied from 1 to 8 Hz. Work was calculated as the area of work loops produced by muscle contractions while the muscle was undergoing sinusoidal length changes. Maximum net work per cycle (6.2 J/kg) was produced at 1 Hz cycle frequency and a 32% duty cycle. Maximum power (26.7 W/kg) was produced at 5 Hz cycle frequency and a 16% duty cycle. As cycle frequency increased, the duty cycle and the stimulus train duration that produced maximum work decreased. The relatively long relaxation time compared with the length of time required to complete the whole cycle precluded the muscle from doing net positive work at high cycle frequencies.

HIGHER MALE EDUCATIONAL HYPERGAMY: EVIDENCE FROM PORTUGAL

2003 ◽  
Vol 35 (2) ◽  
pp. 303-313 ◽  
Author(s):  
HAMILTON R. CORREIA
Keyword(s):  
Mate Choice ◽  
Assortative Mating ◽  
External Validity ◽  
Representative Sample ◽  
Modern Society ◽  
Traditional Society ◽  
Evolutionary Perspective ◽  
Educational Homogamy ◽  
Educational Assortative Mating ◽  
Large Representative

Studies of human mate choice have been based almost exclusively on stated preferences and personal advertisements, and the external validity of such studies has therefore been questioned. In the present study, reallife matings based on a large representative sample of newly wed couples in 1998 (n=66,598) were analysed according to educational assortative mating. The results demonstrate a strong educational homogamy in this national Portuguese sample. However, men tend to marry women who are slightly more educated than themselves. The results are compared with those of a modern society (US, 1940–87) and a traditional society (Kipsigis, 1952–91). Since educational attainment is strongly associated with social status and intelligence, these results are discussed in an evolutionary perspective.

scholarly journals Reproduction of a South American population of pumpkinseed sunfish Lepomis gibbosus (Linnaeus) (Osteichthyes, Centrarchidae): a comparison with the European and North American populations

2005 ◽  
Vol 22 (2) ◽  
pp. 477-483 ◽  
Author(s):  
André L. B. de Magalhães ◽  
Thiago F. Ratton
Keyword(s):  
Gonadosomatic Index ◽  
Brazilian Population ◽  
Lepomis Gibbosus ◽  
South American ◽  
South American Population ◽  
Multiple Spawning ◽  
Pumpkinseed Sunfish ◽  
Introduced Populations ◽  
Egg Diameter ◽  
Made In

The reproductive biology of the introduced pumpkinseed sunfish Lepomis gibbosus (Linnaeus, 1758) in the Custódio's Dam, rio Doce high basin, state of Minas Gerais, Brazil was studied from February/2001 to March/2002 and compared with introduced and native populations. Reproduction occurred almost along the entire period of study with a high frequency of fishes in the advanced ripening/mature and spawned/spent stages. The microscopic analyses indicated that the pumpkinseed sunfish presents multiple spawning. The egg diameter of the Brazilian population is similar to the Spanish, Greek and American ones. The standard length at maturity and the gonadosomatic index of the introduced populations are smaller when compared with native ones. The spawning season of the Brazilian population was the longest among all comparisons made in the present work.

A Pluralistic Analysis of Character Release in Pumpkinseed Sunfish (Lepomis Gibbosus)

Ecology ◽  
2000 ◽  
Vol 81 (10) ◽  
pp. 2799 ◽  
Author(s):  
Beren W. Robinson ◽  
David Sloan Wilson ◽  
Arlene S. Margosian
Keyword(s):  
Lepomis Gibbosus ◽  
Pumpkinseed Sunfish
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