Errata: Estimating and Interpreting Body-Size Growth in Some Anolis Lizards

Copeia ◽  
1979 ◽  
Vol 1979 (1) ◽  
pp. 190
Keyword(s):  
Body Size ◽  
Size Growth

scholarly journals Cell proliferation controls body size growth, tentacle morphogenesis, and regeneration in hydrozoan jellyfish Cladonema pacificum

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7579 ◽  
Author(s):  
Sosuke Fujita ◽  
Erina Kuranaga ◽  
Yu-ichiro Nakajima
Keyword(s):  
Cell Proliferation ◽  
Body Size ◽  
Environmental Changes ◽  
Size Control ◽  
Cellular Mechanisms ◽  
Proliferating Cells ◽  
Size Growth ◽  
Local Cell ◽  
Proliferating Cell

Jellyfish have existed on the earth for around 600 million years and have evolved in response to environmental changes. Hydrozoan jellyfish, members of phylum Cnidaria, exist in multiple life stages, including planula larvae, vegetatively-propagating polyps, and sexually-reproducing medusae. Although free-swimming medusae display complex morphology and exhibit increase in body size and regenerative ability, their underlying cellular mechanisms are poorly understood. Here, we investigate the roles of cell proliferation in body-size growth, appendage morphogenesis, and regeneration using Cladonema pacificum as a hydrozoan jellyfish model. By examining the distribution of S phase cells and mitotic cells, we revealed spatially distinct proliferating cell populations in medusae, uniform cell proliferation in the umbrella, and clustered cell proliferation in tentacles. Blocking cell proliferation by hydroxyurea caused inhibition of body size growth and defects in tentacle branching, nematocyte differentiation, and regeneration. Local cell proliferation in tentacle bulbs is observed in medusae of two other hydrozoan species, Cytaeis uchidae and Rathkea octopunctata, indicating that it may be a conserved feature among hydrozoan jellyfish. Altogether, our results suggest that hydrozoan medusae possess actively proliferating cells and provide experimental evidence regarding the role of cell proliferation in body-size control, tentacle morphogenesis, and regeneration.

Changes in food availability mediate the effects of temperature on growth, metamorphosis and survival in endangered yellow spotted mountain newt: implications for captive breeding programs

Biologia ◽  
2016 ◽  
Vol 71 (4) ◽  
Author(s):  
Somaye Vaissi ◽  
Mozafar Sharifi
Keyword(s):  
Growth Rate ◽  
Body Size ◽  
Food Availability ◽  
Captive Breeding ◽  
Breeding Programs ◽  
Size Growth ◽  
Effects Of Temperature ◽  
Captive Breeding Programs

AbstractThe effects of temperature and food levels on body size, growth rate, time to metamorphosis and survival were studied in larval and post-metamorphic juvenile endangered yellow spotted mountain newts

The effect of drought on body size, growth and abundance of wild brush-tailed phascogales (Phascogale tapoatafa) in south-western Australia

2002 ◽  
Vol 29 (3) ◽  
pp. 235 ◽  
Author(s):  
S. G. Rhind ◽  
J. S. Bradley
Keyword(s):  
Body Size ◽  
Western Australia ◽  
Population Decline ◽  
Adult Males ◽  
Growth Data ◽  
The South ◽  
Nest Boxes ◽  
South West ◽  
Size Growth ◽  
Time Of Year

Body size and growth data were gathered on 387 wild brush-tailed phascogales captured between 1992–1997 in south-western Australia. This marsupial has not previously been studied in Western Australia. Compared with Victorian phascogales, those in the south-west (single region) are typically 20–30% smaller in mass, smaller in skeletal measurements, and sexual size dimorphism is less. Habitat quality was correlated with body size and the largest phascogales were found in swamp/gully systems. These findings suggest food is a normally limiting resource for this species in the south-west environment. Additionally, a significant decrease in growth and size occurred during a drought year (1994), and growth of young seemed restricted during dependency. Maternal mortality appeared high during late lactation as orphaned, unweaned young were encountered in nest boxes. In 1995 adult males were 25% less in mass than usual; females 15% less. Population decline followed and by 1996 capture rates were 1/3 of that typically found for the time of year. Recovery was not apparent until two years after drought (early 1997). In this food-limited environment phascogale populations appear particularly vulnerable to annual fluctuations in rainfall.

Dynamics of a subtidal population of the porcellanid crab Pisidia longicornis (Decapoda: Crustacea)

2000 ◽  
Vol 80 (1) ◽  
pp. 75-83 ◽  
Author(s):  
M. Robinson ◽  
O. Tully
Keyword(s):  
Body Size ◽  
Rapid Growth ◽  
Adult Size ◽  
Size Growth ◽  
Rate Of Decline ◽  
Gravid Females ◽  
Suction Sampling ◽  
Very High ◽  
Crab Stage ◽  
Over Time

A subtidal population of the anomuran crab, Pisidia longicornis was sampled quantitatively throughout 1997. Divers, using SCUBA equipment, conducted suction sampling each month, with concentrated effort directed towards the settlement season. Pisidia occurred in very high densities, constituting the major component of decapod community abundance. Gravid females were detected between March and September. Newly settled megalopae were present in benthic samples from June until late September. Six distinct settlement events were detected during this period, with pulses coinciding with low spring tides. Body size at settlement decreased as temperature during larval development increased. The rapid growth of each distinct settlement group was followed over time through each subsequent crab stage up to maximum adult size. Growth was suspended between December and April. Survival within each distinct settlement group was density-independent during the first summer's growth. Mortality increased between June and July settlement events, with the rate of decline remaining a linear function.

scholarly journals RELASI DUA TANDA DALAM KARYA SENI LUKIS

2019 ◽  
Vol 1 (1) ◽  
pp. 61
Author(s):  
Novriko Darma
Keyword(s):  
Body Size ◽  
Everyday Life ◽  
Slow Growth ◽  
Work Of Art ◽  
Size Growth ◽  
Contemporary Painting ◽  
Final Work

Mengeksplorasi kehidupan pemimpin dengan metafor payung, dalam kehidupan sehari-hari ke dalam karya lukis kontemporer. Payung disini berkaitan dengan gaya kepemimpinan, pemerintaan, dan politik, adapun payung tersebut dimetaforkan ke dalam kepemimpinan. Pemimpin disaat ini banyak yang menyalahgunakan kekuasaanya sehingga seorang pemimpin mampu melakukan apapun yang diinginkan  bahkan melakukan  tindakan criminal dan korupsi. Pembuatan karya akhir ini bertujuan memvisualisasikan relasi dua tanda dalam karya seni lukis, karya yang dihasilkan: Time is Reversed, The Doctrine of the leader, No Longer Body Size, Growth is Slow, krakter Pemimpin, Kong kali kong.Explore the life of leaders with umbrella metaphors, in everyday life into contemporary painting. Umbrella here relates to the style of leadership, governance, and politics, while the umbrella is dimetaforkan into leadership. Leaders at this time many who abuse his power so a leader is able to do whatever is desired even to commit criminal acts and corruption. The making of this final work makes it easy to visualize the relation of the two marks in the work of art, the work produced: Time Reversed, Leader's Teachings, No Longer Body Size, Slow Growth, Leader krakter, Kong kali kong.

scholarly journals Cell proliferation controls body size growth, tentacle morphogenesis, and regeneration in hydrozoan jellyfish Cladonema pacificum

2019 ◽  
Author(s):  
Sosuke Fujita ◽  
Erina Kuranaga ◽  
Yuichiro Nakajima
Keyword(s):  
Cell Proliferation ◽  
Body Size ◽  
Environmental Changes ◽  
Size Control ◽  
Proliferating Cells ◽  
Size Growth ◽  
Regenerative Ability ◽  
Local Cell ◽  
Proliferating Cell

Jellyfish have existed on the earth for around six hundred million years and have evolved in response to environmental changes. Hydrozoan jellyfish, members of phylum Cnidaria, exist in multiple life stages, including planula larvae, vegetatively-propagating polyps, and sexually-reproducing medusae. Although free-swimming medusae display complex morphology and exhibit increase in body size and regenerative ability, their underlying cellar mechanisms are poorly understood. Here, we investigate the roles of cell proliferation in body-size growth, appendage morphogenesis, and regeneration using Cladonema pacificum as a hydrozoan jellyfish model. By examining the distribution of S phase cells and mitotic cells, we revealed spatially distinct proliferating cell populations in medusae, uniform cell proliferation in the umbrella, and local cell proliferation in tentacle bulbs. Blocking cell proliferation by hydroxyurea caused inhibition of body size growth and defects in tentacle branching, nematocyte differentiation, and regeneration. Local cell proliferation in tentacle bulbs is observed in medusae of two other hydrozoan species, Cytaeis uchidae and Rathkea octopunctata, indicating that it may be a conserved feature among hydrozoan jellyfish. Altogether, our results suggest that hydrozoan medusae possess actively proliferating cells and provide experimental evidence regarding the role of cell proliferation in body-size control, tentacle morphogenesis, and regeneration.

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