Sexual dimorphism in sister species ofLeucorajaskate and its relationship to reproductive strategy and life history

2016 ◽  
Vol 18 (2) ◽  
pp. 105-115 ◽  
Author(s):  
Christopher M. Martinez ◽  
F. James Rohlf ◽  
Michael G. Frisk
Keyword(s):  
Life History ◽  
Sexual Dimorphism ◽  
Reproductive Strategy ◽  
Sister Species

Life History Consequences of Sexual Dimorphism in a Chernetid Pseudoscorpion

Ecology ◽  
1987 ◽  
Vol 68 (5) ◽  
pp. 1495-1501 ◽  
Author(s):  
David W. Zeh
Keyword(s):  
Life History ◽  
Sexual Dimorphism

Life on the edge: the ecology and life history of the tropidurine iguanid lizard Uranoscodon superciliosum

1990 ◽  
Vol 68 (7) ◽  
pp. 1366-1373 ◽  
Author(s):  
Jeffrey M. Howland ◽  
Laurie J. Vitt ◽  
Pamela T. Lopez
Keyword(s):  
Life History ◽  
Social Interaction ◽  
Sexual Dimorphism ◽  
Small Diameter ◽  
Habitat Specialization ◽  
Large Size ◽  
Tropical Wet Forest ◽  
History Of ◽  
Forest Streams ◽  
Small Forest

An Amazonian population of the iguanid lizard Uranoscodon superciliosum was studied in lowland tropical wet forest in central Pará, Brazil. These nonheliothermic lizards are restricted to densely vegetated habitats near (often over) water, particularly riverbanks and small forest streams, where they utilize small-diameter perches and feed on a wide variety of invertebrates, apparently at the water's edge. They mature at moderate to large size at an age of about 1.5 years. Production of moderate-sized clutches of eggs is seasonal, and reproduction and fat storage both cycle in association with rainfall and flooding. Although they occur in fairly high densities, social interaction is uncommon and sexual dimorphism is not pronounced. The ecology and life history of this lizard seem to be strongly influenced by the unusual habitat specialization.

Sexual dimorphism in body size and life‐history traits in a population ofTriturus alpestris alpestris

2004 ◽  
Vol 71 (sup2) ◽  
pp. 117-120 ◽  
Author(s):  
Elena Marzona ◽  
Daniele Seglie ◽  
Cristina Giacoma
Keyword(s):  
Life History ◽  
Body Size ◽  
Sexual Dimorphism ◽  
Life History Traits

scholarly journals Trade-off between offspring mass and number: the lightest offspring bear the costs

2020 ◽  
Vol 16 (2) ◽  
pp. 20190707
Author(s):  
Joanie Van de Walle ◽  
Andreas Zedrosser ◽  
Jon E. Swenson ◽  
Fanie Pelletier
Keyword(s):  
Life History ◽  
Litter Size ◽  
Phenotypic Variation ◽  
Reproductive Strategy ◽  
Life History Theory ◽  
Brown Bear ◽  
Offspring Size ◽  
Trade Off ◽  
The Relationship

Life-history theory predicts a trade-off between offspring size and number. However, the role of intra-litter phenotypic variation in shaping this trade-off is often disregarded. We compared the strength of the relationship between litter size and mass from the perspective of the lightest and the heaviest yearling offspring in 110 brown bear litters in Sweden. We showed that the mass of the lightest yearlings decreased with increasing litter size, but that the mass of the heaviest yearling remained stable, regardless of litter size. Consistent with a conservative reproductive strategy, our results suggest that mothers maintained a stable investment in a fraction of the litter, while transferring the costs of larger litter size to the remaining offspring. Ignoring intra-litter phenotypic variation may obscure our ability to detect a trade-off between offspring size and number.

Prochetostoma expandens (Diptera: Tephritidae) sp. n., a fruit parasite of Ilex integra Thunberg (Aquifoliaceae) in Japan

Zootaxa ◽  
2011 ◽  
Vol 2784 (1) ◽  
pp. 39
Author(s):  
MASAHIRO SUEYOSHI ◽  
HO-YEON HAN
Keyword(s):  
Life History ◽  
Morphological Characters ◽  
Sister Species ◽  
Fruit Tissue ◽  
The Third

The third species of the genus Prochetostoma, developing in the fruits of Ilex integra Thunberg, has been reported six times in Japan since 1985 but has not been described. We here describe adults and immatures of this species as P. expandens sp. n. Based on the adult morphological characters, P. expandens is suggested to be the sister species of P. bhutanicum Han. Two possible morphological synapomorphies of these two species are proposed. We also investigated a large number of larvae of P. expandens collected from fruits of I. integra. Detailed information about the life history is presented: oviposition takes place under the skin of immature fruits of I. integra in spring; larvae consume fruit tissue in summer and autumn; single fully matured larva escapes from the fruit and drops down to the ground for pupation; and adults emerge in the subsequent spring.

Selection on learning performance results in the correlated evolution of sexual dimorphism in life history

Evolution ◽  
2016 ◽  
Vol 70 (2) ◽  
pp. 342-357 ◽  
Author(s):  
Martyna K. Zwoinska ◽  
Martin I. Lind ◽  
Maria Cortazar-Chinarro ◽  
Mark Ramsden ◽  
Alexei A. Maklakov
Keyword(s):  
Life History ◽  
Sexual Dimorphism ◽  
Learning Performance ◽  
Correlated Evolution ◽  
Performance Results
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