Maternal Size Determines Clutch Mass, whereas Breeding Timing Influences Clutch and Egg Sizes in the Tropical Lizard,<i>Calotes versicolor</i>(Agamidae)

Shanbhag, Bhagyashri A.; Radder, Rajkumar S.; Saidapur, Srinivas K.

doi:10.1643/0045-8511(2000)000[1062:msdcmw]2.0.co;2

Cited by 25 publications

(25 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the early part of the breeding season, clutch size is large and egg size is small, while in the late breeding season, this trend is reversed (Shanbhag et al, 2000). Apparently, the female invests different quantities of yolk in her eggs depending upon the breeding time.…”

Section: Discussionmentioning

confidence: 97%

See 1 more Smart Citation

Yolk partitioning in embryos of the lizard, Calotes versicolor: Maximize body size or save energy for later use?

2004

Self Cite

View full text Add to dashboard Cite

The hatchlings of Calotes versicolor and other congeners retain residual yolk for immediate post-hatching needs. Excision of 8% yolk (approximately equal residual yolk) from the eggs resulted in smaller hatchlings when compared to those emerging from sham operated eggs. However, hatchlings in both groups retained the same amount of residual yolk. The findings suggest that residual yolk in hatchlings of C. versicolor is an important part of the energy budget set aside by developing embryos and that the advantages of large hatchling size are counter balanced by selection for residual yolk.

show abstract

Section: Discussionmentioning

confidence: 97%

“…The present study was designed to test the above hypothesis in the lizard, Calotes versicolor. This is an ideal species since it has a large clutch size (2272) that permits intra-clutch manipulation of eggs (Shanbhag et al, 2000) and the information regarding the amount and pattern of yolk internalization are known (Radder et al, 2002a).…”

Section: Introductionmentioning

confidence: 99%

Yolk partitioning in embryos of the lizard, Calotes versicolor: Maximize body size or save energy for later use?

2004

Self Cite

View full text Add to dashboard Cite

show abstract

“…Pelvic girdle aperture has also been suggested to limit neonate size in primates (Leutenegger, 1979). In Calotes versicolor, an agamid lizard, pelvic aperture itself does not vary with female size, but limits egg width, whereas egg volume varies adaptively with length (Shanbhag et al, 2000). Sinervo and Licht (1991) found that larger eggs of side-blotched lizards (Uta stansburiana) were more likely to be oviducally bound or burst upon oviposition.…”

Section: Morphological Constraints On Offspring Sizementioning

confidence: 99%

Plant and Animal Reproductive Strategies: Lessons from Offspring Size and Number Tradeoffs

Dani

Kodandaramaiah

2017

Front. Ecol. Evol.

View full text Add to dashboard Cite

The tradeoff between offspring size and number is ubiquitous and manifestly similar in plants and animals despite fundamental differences between the evolutionary histories of these two major life forms. Fecundity (offspring number) primarily affects parental fitness, while offspring size underpins the fitness of parents and offspring. We provide an overview of theoretical models dealing with offspring size and fitness relationships. We follow that with a detailed examination of life-history constraints and environmental effects on offspring size and number, separately in plants and animals. The emphasis is on seed plants, but we endeavor to also summarize information from distinct animal groups-insects, fishes, reptiles, birds, and mammals. Furthermore, we analyse genetic controls on offspring size and number in two model organisms-Arabidopsis and Drosophila. Despite the deep evolutionary divergence between plants and animals, we find four trends in reproductive strategy that are common to both lineages: (i) offspring size is generally less variable than offspring number, (ii) offspring size increases with increasing parent body size, (iii) maternal genes restrict offspring size and increase offspring numbers, while zygotic genes act to increase offspring size; such parent-offspring conflicts are enhanced when there is sibling rivalry, and (iv) variation in offspring size increases under sub-optimal (harsh) environmental conditions. The most salient difference between plants and animals is that the latter tend to produce larger (fewer) offspring under sub-optimal conditions while seed plants invest in smaller (many) seeds, suggesting that maternal genetic control over offspring size increases in plants but decreases in animals with parental care. The time is ripe for greater experimental exploration of genetic controls on reproductive allocation and parent-offspring conflicts in plants and animals under sub-optimal (harsh) environments.

show abstract

“…Gravid lizards were encountered in 1 individual of C. emma in April, and in 3 individuals of C. versicolor in June, August, and September. Shanbhag et al (2000) reported that female C. versicolor showed inactive reproduction from December to April, and gravidity was encountered from May to October.…”

Section: Discussionmentioning

confidence: 99%

Reproductive pattern and sex hormones of Calotes emma Gray 1845 andCalotes versicolor Daudin 1802 (Squamata; Agamidae)

Meesook¹,

Artchawakom²,

Aowphol³

et al. 2016

Turk J Zool

View full text Add to dashboard Cite

We monitored testicular and ovarian morphologies, seminiferous tubules, the sexual segments of the kidneys (SSK), follicular histologies, and male testosterone and female estradiol to define the reproductive pattern of Calotes emma and Calotes versicolor. Samples were collected monthly at Sakaerat Environmental Research Station in Thailand for 1 year. Testicular hypertrophies occurred at a time characteristic for each species, with their time course corresponding well to both active spermatogenesis and the hypertrophied SSK. Gravid females were also found at a time characteristic for each species. In active reproductive females, oviductal eggs were concomitantly encountered with ovarian vitellogenic follicles. The previtellogenic and vitellogenic follicles corresponded well to granulosa layer alterations. The distinct large pyriform cells were present in the granulosa layer of previtellogenic follicles but disappeared from the vitellogenic follicles. Male testosterone levels rose during testicular and SSK hypertrophies, and female estradiol levels increased during active reproductive stages of late vitellogenic follicles and gestation. We suggest that the reproductive patterns of C. emma and C. versicolor fall into the same reproductive pattern of annual continual reproduction, but that the time courses of such events are different in the 2 Calotes, and even in individuals of the same Calotes population.

show abstract

Maternal Size Determines Clutch Mass, whereas Breeding Timing Influences Clutch and Egg Sizes in the Tropical Lizard,Calotes versicolor(Agamidae)

Cited by 25 publications

References 13 publications

Yolk partitioning in embryos of the lizard, Calotes versicolor: Maximize body size or save energy for later use?

Yolk partitioning in embryos of the lizard, Calotes versicolor: Maximize body size or save energy for later use?

Plant and Animal Reproductive Strategies: Lessons from Offspring Size and Number Tradeoffs

Reproductive pattern and sex hormones of Calotes emma Gray 1845 andCalotes versicolor Daudin 1802 (Squamata; Agamidae)

Contact Info

Product

Resources

About