scholarly journals Body Size Distribution and Ovarian Histology of Pisodonophis boro (Hamilton, 1822) (Anguillifomes: Ophichthidae) from Pranburi River Estuary, Thailand

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Phakorn Na Lampang ◽  
◽  
Amphornphan Palasai ◽  
Sinlapachai Senarat ◽  
Wannee Jiraungkoorskul ◽  
...  
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
River Estuary ◽  
Reproductive Mode ◽  
Sex Reversal ◽  
Mean Value ◽  
The Body ◽  
Spatial Displacement ◽  
Macroscopic Observation ◽  
Commercially Important

Reproductive characteristics on the snake eel Pisodonophis boro, a commercially important and high-value food source species in Thailand, have never been reported. We determined the body size distribution and gonadal structure of P. boro during the reproductive cycle. Healthy specimens were collected by local Pranburi River stuarine fishermen during March 2015 to March 2016. The total length of P. boro ranged from 24 cm to 97 cm with mean value of 66.28 ± 2.59 cm (N = 105, mean ± SD). Subsequent macroscopic observation demonstrated that the gonad of P. boro is a paired and elongated organ located parallel to the digestive tract. Surprisingly, the 105 specimens were all female, suggesting the protogynous sex reversal or spatial displacement of sexes in this species. Furthermore, only early and late perinucleolar stage oocytes were histologically identified throughout this study (synchronous developing type), which is often observed in semelparous fish species. These unique reproductive features of this eel in Thailand warrants further investigations on the male-female distribution and precise reproductive mode.

Habitat type as strongest predictor of the body size distribution ofChydorus sphaericus(O. F. Müller) in small water bodies

2014 ◽  
Vol 99 (5) ◽  
pp. 382-392 ◽  
Author(s):  
Anna M. Basińska ◽  
Marcin Antczak ◽  
Kasper Świdnicki ◽  
Vincent E. J. Jassey ◽  
Natalia Kuczyńska-Kippen
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
Habitat Type ◽  
The Body ◽  
Water Bodies ◽  
Small Water ◽  
Small Water Bodies

scholarly journals The Evolution of Primate Body Size: Left-skewness, Maximum Size, and Cope’s Rule

2016 ◽  
Author(s):  
Richard C. Tillquist ◽  
Lauren G. Shoemaker ◽  
Kevin Bracy Knight ◽  
Aaron Clauset
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
Maximum Size ◽  
The Body ◽  
Skewed Distribution ◽  
Primate Species ◽  
Opposite Pattern ◽  
Evolutionary Characteristic ◽  
Initial Tendency ◽  
Cope’S Rule

Body size is a key physiological, ecological, and evolutionary characteristic of species. Within most major clades, body size distributions follow a right-skewed pattern where most species are relatively small while a few are orders of magnitude larger than the median size. Using a novel database of 742 extant and extinct primate species’ sizes over the past 66 million years, we find that primates exhibit the opposite pattern: a left-skewed distribution. We investigate the long-term evolution of this distribution, first showing that the initial size radiation is consistent with plesiadapiformes (an extinct group with an uncertain ancestral relationship to primates) being ancestral to modern primates. We calculate the strength of Cope’s Rule, showing an initial tendency for descendants to increase in size relative to ancestors until the trend reverses 40 million years ago. We explore when the primate size distribution becomes left-skewed and study correlations between body size patterns and climactic trends, showing that across Old and New World radiations the body size distribution initially exhibits a right-skewed pattern. Left-skewness emerged early in Old World primates in a manner consistent with a previously unidentified possible maximum body size, which may be mechanistically related to primates’ encephalization and complex social groups.

Levantine overkill: 1.5 million years of hunting down the body size distribution

2022 ◽  
Vol 276 ◽  
pp. 107316
Author(s):  
Jacob Dembitzer ◽  
Ran Barkai ◽  
Miki Ben-Dor ◽  
Shai Meiri
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
The Body

scholarly journals The body size distribution of Filinia longiseta (Ehrenberg) in different types of small water bodies in the Wielkoposka region

Limnetica ◽  
2010 ◽  
Vol 29 (1) ◽  
pp. 171-181
Author(s):  
Anna Basińska ◽  
Natalia Kuczyńska-Kippen ◽  
Kasper Świdnicki
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
The Body ◽  
Water Bodies ◽  
Small Water ◽  
Different Types ◽  
Small Water Bodies

scholarly journals Distribution and Size of Crab (Portunus pelagicus) in Betahwalang Waters, Demak, Central JavaSex Ratio, Size Distribution and Length-Weight Relationship of Portunus pelagicus Linnaeus, 1758 (Malacostraca : Portunidae) in Betahwalang, Demak, Central Java

2021 ◽  
Vol 24 (1) ◽  
pp. 133-140
Author(s):  
Sri Redjeki ◽  
Muhammad Zainuri ◽  
Ita Widowati ◽  
Ambariyanto Ambariyanto ◽  
Rudhi Pribadi ◽  
...  
Keyword(s):  
Body Weight ◽  
Body Size ◽  
Sex Ratio ◽  
Size Distribution ◽  
Growth Parameters ◽  
Carapace Width ◽  
The Body ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Male And Female

Blue Swimming Crab (P. pelagicus, Linnaeus, 1758) is the main fisheries product from Betahwalang peoples. Fishing activity of Blue Swimming Crab by the fisherman almost every day in Betahwalang waters. Distribution and body size data of Blue Swimming Crab can be used for sustain management reference. The purpose of this study was to determine distribution pattern and body size of Blue Swimming Crab, started from July to November 2018 in Betahwalang waters, Demak. The data analyze consist of sex ratio, carapace width distribution and relationship between carapace width and body weight. 11790 samples Blue Swimming crab from Betahwalang waters consist of 7070 female crabs and 4720 male crabs. The result showed that sex-ratio between male and female crabs are balanced (1.0:1.37), with the most female crabs found at July and August. Body size distribution of male and female crabs are dominated in class 103-111 mm carapace width. Male and female crabs have a positive allometric on growth parameters, that means growth of the body weight is faster than carapace width. The result showed that Blue Swimming Crab in Betahwalang waters are support for sustainable fisheries. 

scholarly journals Associations of Nativity, Age at Migration, and Percent of Life in the U.S. with Midlife Body Mass Index and Waist Size in New York City Latinas

2020 ◽  
Vol 17 (7) ◽  
pp. 2436
Author(s):  
Carmen B. Rodriguez ◽  
Ying Wei ◽  
Mary Beth Terry ◽  
Katarzyna Wyka ◽  
Shweta Athilat ◽  
...  
Keyword(s):  
Body Mass Index ◽  
New York ◽  
Body Size ◽  
Quantile Regression ◽  
Size Distribution ◽  
Body Mass ◽  
Central Obesity ◽  
The Body ◽  
Waist Size ◽  
The U.S

Migration to the U.S. has been associated with increased body size and obesity risk in Latinas, but results for Caribbean immigrant women are limited and inconclusive. Emerging evidence also suggests that early-life environment associations with women’s midlife body mass index (BMI) may be different for larger and smaller women, but this has not been tested within migration life-course history. We examined the associations of nativity and migration timing with midlife body size in a sample of majority Caribbean Latinas and whether these associations varied across the body size distribution. We used interview data from 787 self-identified Latinas (ages 40–65 years) and assessed overall obesity using BMI (kg/m2) and central obesity based on waist circumference (WC, cm). We used linear and quantile regression to examine the association of migration history with BMI and WC and logistic regression for the probability of obesity. Foreign birthplace, later migration age, and lower percent of life in the U.S. were associated with lower BMI and WC means and lower odds of overall and central obesity. Quantile regression showed only inverse associations in the upper quantiles of BMI and WC. For example, relative to U.S.-born women, women living <50% of their lives in the U.S. had lower BMI in the 75th BMI percentile (β = −4.10, 95% CI: −6.75, −0.81), with minimal differences in the 25th (β = 0.04, 95% CI: −1.01, 0.96) and 50th BMI percentiles (β = −1.54, 95% CI: −2.90, 0.30). Our results support that migration to and increasing time in the U.S. are associated with greater body size in midlife Latina women, with stronger influences at higher body size distribution.

The Body Size of Headstarted and Wild Juvenile European Pond Turtles (Emys orbicularis)

2017 ◽  
Vol 25 (2) ◽  
pp. 161
Author(s):  
Sławomir Mitrus ◽  
Bartłomiej Najbar ◽  
Adam Kotowicz ◽  
Anna Najbar
Keyword(s):  
Body Size ◽  
The Body ◽  
Emys Orbicularis

scholarly journals First record of Pachycrocuta brevirostris (Gervais, 1850) from Ukraine on the background of the European occurrence of the species

2021 ◽  
Author(s):  
Adrian Marciszak ◽  
Yuriy Semenov ◽  
Piotr Portnicki ◽  
Tamara Derkach
Keyword(s):  
Body Size ◽  
First Record ◽  
The Body ◽  
Crocuta Crocuta ◽  
Early Pleistocene ◽  
Eastern Asia ◽  
South Eastern

AbstractCranial material ofPachycrocuta brevirostrisfrom the late Early Pleistocene site of Nogaisk is the first record of this species in Ukraine. This large hyena was a representative of the Tamanian faunal complex and a single specialised scavenger in these faunas. The revisited European records list ofP.brevirostrisdocumented the presence of this species in 101 sites, dated in the range of 3.5–0.4 Ma. This species first disappeared in Africa, survived in Europe until ca. 0.8–0.7 Ma, and its last, relict occurrence was known from south-eastern Asia. The main reason of extinction ofP.brevirostrisprobably was the competition withCrocuta crocuta. The cave hyena was smaller, but its teeth were proportionally larger to the body size, better adapted to crushing bones and slicing meat, and could also hunt united in larger groups.

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