scholarly journals Sexual Dimorphism in Anthonomus santacruzi (Coleoptera: Curculionidae): a Biological Control Agent of Solanum mauritianum Scopoli (Solanaceae)

2020 ◽  
Vol 49 (6) ◽  
pp. 840-850
Author(s):  
Archbold Sasa ◽  
Rafał Gosik ◽  
Ed T. F. Witkowski ◽  
Marcus J. Byrne ◽  
Miłosz A. Mazur
Keyword(s):  
Body Size ◽  
Sexual Dimorphism ◽  
Body Length ◽  
Biological Control Agent ◽  
Abdominal Tergite ◽  
Total Body Length ◽  
The Body ◽  
Body Structure ◽  
Solanum Mauritianum ◽  
Total Body

AbstractThere is evident variation in body size amongst Anthonomus santacruzi Hustache, 1924, weevils. The aims of this study were to assess if the variation in body size in A. santacruzi weevils is a result of sexual dimorphism and what features can be used to distinguish males from females. The weevils were collected from field sites in Mpumalanga, South Africa, where they were introduced as biocontrol agents of Solanum mauritianum Scopoli. Body structures and the presence/absence of the tergal notch was examined under an optical stereomicroscope and SEM to assess differences between sexes. The morphometric analysis of the body structures included rostrum length (base–apex and antennal insertion–apex), elytral length and width, pronotum length and width, first tarsus length, first tibia length, funiculus length and total body length. Rostrum length, elytra length and width and total body length were significantly larger in females than in males. A tergal notch in the 8th abdominal tergite was present in males and absent in females. The body structure; of rostrum length, elytra length and width and total body length overlapped between sexes in some specimens. The abdominal tergal notch was found to be the most useful body structure to distinguish males from females in A. santacruzi.

scholarly journals PENGUKURAN PANJANG TUBUH CACING NIPAH PENDEK Namalycastis abiuma (POLYCHAETA: NEREDIDAE) DARI PERAIRAN MANGROVE SUNGAI KAPUAS KALIMANTAN BARAT

2018 ◽  
Vol 11 (2) ◽  
pp. 183-189
Author(s):  
Junardi Junardi
Keyword(s):  
Body Weight ◽  
Body Size ◽  
Body Length ◽  
Anterior Segment ◽  
Total Body Length ◽  
The Body ◽  
Female Body Size ◽  
Alternative Approach ◽  
Total Body ◽  
The Relationship

AbstrakCacing Nipah Pendek Namalycastis abiuma memiliki tubuh yang elastis dan mudah putus sehingga diperlukan pendekatan morfometri tubuh lain untuk menentukan panjang tubuh sesungguhnya. Tujuan penelitian ini untuk menentukan panjang tubuh total cacing nipah pendek dengan menggunakan bobot tubuh, jumlah total segmen berseta, panjang tiga segmen anterior pertama (L3) dan lebar segmen berseta atau setiger ke-10 (S-10). Spesimen yang digunakan dipilih hanya individu yang lengkap dan utuh. Pengukuran dilakukan dibawah mikroskop dengan lensa okular yang dilengkapi dengan mikrometer. Data dianalisis dengan analisis korelasi. Cacing yang digunakan sebanyak 258 individu yang terdiri atas 190 immature, 54 submature dan 14 mature dengan ukuran panjang tubuh rata-rata berturut-turut 108,62±34,80 mm, 172,27±42,78 mm dan 123,14±57,40 mm. Cacing betina ditemukan memiliki ukuran tubuh lebih besar dari jantan. Panjang tubuh N. abiuma dapat diduga dengan bobot tubuh, panjang L3 dan lebar S-10 dengan nilai koefisien korelasi (r) berturut-turut 0,82, 0,73 dan 0,78. Pendekatan morfometri dapat digunakan untuk menentukan ukuran tubuh N. abiuma.Abstract The short nypa palm worm Namalycastis abiuma has an elastic and fragile body. Therefore, an alternative approach of morphometrical techniques is needed to determine the total body length. This research aimed to estimate the total body length of the short nypa palm worm based on body weight, the total number of segments, the length of the first three anterior segment (L3) and the tenth setiger width (S10). Body measurement was done using stereomicroscope fitted with the micrometer. Correlation analysis was done to describe the relationship between the length of L3 and the width of S10. A total of 258 complete and whole specimens consisted of 190 immature, 54 submature, and 14 mature individuals. The average body length of immature individuals was 108.62±34.80 mm, 172.27±42.78 mm for sub mature individuals, and 123.14±57.40 mm for mature individuals. Based on sexual dimorphism, the female body size is larger than male. The body length of N. abiuma can be estimated by body weight, the length of L3, and the  width of S10, with  correlation coefficient (r) of 0.82, 0.73 and 0.78, respectively. Morphometry approach can be used to determine the body size of N. abiuma. 

Sexual dimorphism and allometry in the giant water strider Gigantometra gigas

1999 ◽  
Vol 77 (6) ◽  
pp. 923-929 ◽  
Author(s):  
Michelle Tseng ◽  
Locke Rowe
Keyword(s):  
Body Size ◽  
Sexual Dimorphism ◽  
Body Length ◽  
Total Body Length ◽  
Correlated Response ◽  
Water Strider ◽  
Leg Length ◽  
Allometric Analysis ◽  
Total Leg ◽  
Total Body

This study describes sexual dimorphism in size (total body length and lengths of leg components) and in the allometric relationships between leg-component lengths and total body length in the giant water strider Gigantometra gigas (Heteroptera: Gerridae). Gigantometra gigas is the largest known gerrid, and has been previously described as monomorphic for body size. We compare our results with analogous data collected on Gerris buenoi, a species of more moderate size, where females are larger than males. Based on 94 specimens of G. gigas, we conclude that males are larger than females in all measured traits. This dimorphism was most spectacular in the leg components, which are 10-50% longer in males than in females. Males are generally more variable in size than females, and this is especially so for leg components. Allometric analysis suggests that total leg lengths (particularly middle and rear) increase at a much greater rate with body size in males than in females, therefore there is sexual dimorphism in allometries on the scale of that in the traits themselves. The relationship between middle and hind leg lengths is strong in both sexes, and appears to differ very little between the sexes or between G. gigas, and Ge. buenoi. These data suggest a constraint on this relationship, perhaps because of the biomechanics of locomotion. We propose that sexual selection acting on middle leg lengths in males explains both the increase and variance in middle leg length, and that hind leg length follows by correlated response.

scholarly journals Length-weight relationship of European catfish (Silurus glanis L.) fry reared at different stocking densities under controlled conditions

2021 ◽  
pp. 47-51
Author(s):  
V. Krasteva ◽  
M. Yankova
Keyword(s):  
Body Length ◽  
Stocking Density ◽  
Total Body Length ◽  
The Body ◽  
Small Fish ◽  
Silurus Glanis ◽  
Group A ◽  
European Catfish ◽  
Total Body ◽  
Group B

Abstract. The present paper investigates the body length and weight, and the size-weight variations of one-month-old European catfish reared at 4 variants of stocking density: Variant 1 – 5 spec/l; Variant 2 – 10 spec/l; Variant 3 – 15 spec/l and Variant 4 – 28 spec/l. The experiment is carried out at the Institute of Fisheries and Aquaculture, Plovdiv for a period of 16 days, using a production system consisting of tubs with continuous water flow (0.7 l/min). At the end of the experiment, the fish from each variant are sorted in three size-weight groups: A – large, B – medium and C – small. The number of fish in each group is established. From the group of the medium- and small-sized fish, 150 speciments are measured, while from the group of the large specimens, which are the smallest in number, all specimens are measured for the biometric parameters body weight (BW, g) and total body length (TL, cm). The results from the study show small variations in the length and weight of the fish reared at the lowest stocking density (Variant 1). As the density increase, the size-weight differences between the specimens from Group A also increased, while of those from Group B they decrease. The number of the medium-sized fish decrease (p≤0.001) while the number of large specimens (p≤0.01) and small fish increase (p≤0.001).

FEATURES OF THE DYNAMICS OF INDICATORS OF TOTAL BODY SIZE IN BOYS AND GIRLS AGED 17-22 YEARS

2020 ◽  
pp. 61-68
Author(s):  
С. В. Михайлова
Keyword(s):  
Body Size ◽  
Young People ◽  
Body Length ◽  
Growth Dynamics ◽  
The Body ◽  
Chest Circumference ◽  
Body Type ◽  
Height Gain ◽  
Total Body ◽  
The University

Цель - выявление особенностей динамики показателей тотальных размеров тела у студентов с различными соматотипами в возрастном периоде 17-22 года. Материал и методы. Исследование проводили в течение 2010-2018 гг. по результатам проспективных наблюдений показателей тотальных размеров тела у 530 студентов (240 юношей и 290 девушек) 17-22 лет в период их обучения в вузе. Типы телосложения определяли по методу В. Г. Штефко и Б. А. Островского (1929) в изложении С. С. Дарской (1975). Результаты. Среди обследованных студентов у 49,2 % юношей выявлены приросты ДТ, завершившиеся в 21-22 года, и у 35,6 % девушек, продолжающиеся только до 19-20 лет. У большинства студентов за время обучения в вузе отмечены приросты показателей массы тела и окружности груди, при этом также выявлены юноши и девушки, у которых эти показатели не изменились или даже снизились за исследуемый период. На старших курсах у большинства студентов приросты массы тела и окружности груди замедляются с остановкой ростовых процессов, но не прекращаются и ведут к увеличению числа студентов с избыточной массой тела, что подтверждается возрастанием численности молодежи с дигестивным типом телосложения и высокими значениями показателей индекса массы тела (BMI), в большей степени выраженным среди юношей. У студентов с торакальным типом телосложения, который является самым распространенным и динамичным соматотипом в исследуемой выборке, отмечены значимые приросты тотальных размеров тела. Аналогичная динамичность приростов выявлена у юношей с мышечным телосложением. За время обучения в вузе численность молодежи с торакальным типом телосложения снижается, при этом возрастает доля студентов с мышечным и дигестивным соматотипами. За время обучения в вузе у 14,1 % студентов меняется тип телосложения. Выводы. Выявлена обусловленность приростов показателей тотальных размеров тела у юношей и девушек в возрастном периоде 17-22 года типом телосложения, оказывающем влияние на скорость и направленность динамики показателей длины и массы тела и окружности грудной клетки. Objective - to identify the characteristics of the dynamics of indicators of total body size in students aged 17-22 years with different somatotypes. Material and methods. The study was conducted during 2010-2018 and was based on the results of prospective observations of morphological indicators of 530 students (240 boys and 290 girls) aged 17-22 during the period of study at the university. Body types were determined by the method of V. G. Shtefko and B. A. Ostrovsky (1929) as presented by S. S. Darskaya (1975). Results. Among the examined students, an increase in body length (BL) was found in 49,2 % of young men, and in 35,6 % of girls; the height gain stopped by 21-22 years in boys and by 19-20 years in girls. The majority of students during their study at the university showed increases in body mass and chest circumference. Boys and girls who demonstrated no change or even a decrease in these indicators during the study period were also found. In most senior students, gains in body weight and chest circumferences slowed down when the height growth ceased, but did not stop. It led to an increase in the number of overweight students, which is confirmed by the increase in the number of young people with an alimentive body type and high BMI values, more pronounced among boys. Students with a thoracic body type, which was the most common and dynamic somatotype in the studied sample, showed significant gains in total body size. Similar growth dynamics was found in boys with muscular body type. During training at the university, the number of young people with thoracic body type decreased, while the proportion of students with muscular and alimentive somatotypes increased. During the period of study in high school, the body type changed in 14,1 % students. Conclusions. The dependency of gains in indicators of total body size among boys and girls aged 17-22 on body type was revealed. The body type influenced the speed and direction of the dynamics of indicators of body length, weight and chest circumference.

scholarly journals A new xandarellid euarthropod from the Cambrian Chengjiang biota, Yunnan Province, China

2018 ◽  
Vol 156 (08) ◽  
pp. 1375-1384 ◽  
Author(s):  
Xianguang Hou ◽  
Mark Williams ◽  
Robert Sansom ◽  
Derek J. Siveter ◽  
David J. Siveter ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Body Length ◽  
Yunnan Province ◽  
Total Body Length ◽  
The Body ◽  
Mode Of Life ◽  
Chengjiang Biota ◽  
Total Body

AbstractThe euarthropod Luohuilinella deletres sp. nov. is described from rare material from the Chengjiang biota, Cambrian Series 2, Stage 3, of Yunnan Province, China. Phylogenetic analysis recovers a xandarellid affinity for L. deletres, representing only the fifth described species of this clade. L. deletres possesses a head shield that is about one-fifth of the total body length and a trunk with 30 tergites, the reduced anterior-most tergite and terminal three tergites lacking pleural elongations. Anteriorly situated notches in the head shield are associated with stalked eyes, in contrast to the more posterior, enclosed eye slits present in Xandarella. Posterior to the antennae there are at least 11 pairs of biramous appendages preserved, including three pairs in the head. The morphology of the midline gut of L. deletres, in which lateral, unbranched diverticula are wider towards the front of the body, is a characteristic also found in various trilobites. The dorsoventrally flattened exoskeleton suggests a benthic or nektobenthic mode of life for L. deletres, as for other trilobitomorphs, and it likely used its well-developed anteriorly positioned eyes for searching out food, either to scavenge or to find prey.

Two new species of philometrid nematodes (Nematoda: Philometridae) in Epinephelus coioides (Hamilton, 1822) from the South Bali Sea, Indonesia

Zootaxa ◽  
2013 ◽  
Vol 3609 (1) ◽  
pp. 49-59 ◽  
Author(s):  
KARTIKA DEWI ◽  
HARRY W. PALM
Keyword(s):  
New Species ◽  
Body Length ◽  
Total Body Length ◽  
Middle Part ◽  
The Body ◽  
Epinephelus Coioides ◽  
The South ◽  
Fish Family ◽  
Two New Species ◽  
Total Body

Based on light and scanning electron microscopy, two new species of philometrid nematodes, Spirophilometra endangae sp. nov. and Philometra epinepheli sp. nov. (Nematoda: Dracunculoidea: Philometridae) are described from Epinephelus coioides (Hamilton, 1822) (Perciformes: Serranidae) from the South Bali Sea, Indonesia. Spirophilometra endangae sp. nov. was isolated from the fins of E. coioides. The new species can be distinguished from the most closely related S. eichleri Parukhin, 1971 by a larger total body length and the site of infection in the host. The new species differs from S. centropomi (Caballero, 1974) also in the larger body size of the gravid females and the site of infection in the host. S. en-dangae sp. nov. differs from S. pacifica (Moravec, Santana-Pineros, Gonzales-Solis & Torres-Huerta, 2007) in the struc-ture and arrangement of the spines on the middle part of the body, the infection site of the worm, the type host and the zoogeographical host distribution. Philometra epinepheli sp. nov. differs from all other Philometra spp. congeners so far recorded from Ephinepelus groupers in the total body length and the site of infection. This is the first opercula-infecting species of Philometra described from the fish family Serranidae.

Keeping, Breeding, and Maintenance of Zooculture of the Ladakh Toad, Bufotes latastii (Boulenger, 1882)

2020 ◽  
Vol 27 (5) ◽  
pp. 284-290
Author(s):  
Kseniya A. Matushkina ◽  
Artem A. Kidov ◽  
Spartak N. Litvinchuk
Keyword(s):  
Body Length ◽  
Total Duration ◽  
Total Body Length ◽  
The Body ◽  
Laboratory Population ◽  
Double Row ◽  
Jammu And Kashmir ◽  
Early Maturing ◽  
Total Body ◽  
One Year

In this paper we present results of laboratory reproduction of the Ladakh toad (Bufotes latastii) for three generations. Two pairs of animals, which were collected in April of 2013 in Jammu and Kashmir (India), became founders of a laboratory population. The first female gave offspring four times, while the second only once. The number of eggs in clutches obtained from the first female was 6804 – 10149 and from the second was 4080 eggs. Males, which were born in laboratory, started to vocalize at the age of 3 – 4 months after metamorphosis and at the age of one year successfully reproduced. Females become mature at the two-year age only. Thus, B. latastii is a fast-growing and early-maturing species. The number of eggs in clutches of 2-year-old laboratory females ranged from 31 to 6420 eggs (n = 28) and 3-year-old females from 19 to 6859 eggs (n = 21). Clutches were single- or double-row strings. The average thickness of egg strings was 3.2 – 5.9 mm. The diameter of eggs was 0.8 – 1.9 mm. The duration of embryonic development (until separation of pre-larvae from egg strings) was 2 – 5 days. The total body length of pre-larvae was 2.0 – 4.3 mm. The first larvae that started swimming and feeding were observed within 2 – 3 days after separation of pre-larvae from egg strings. The body length of larvae at the time of start of exogenous feeding was 2.9 – 4.3 mm and the length of tail was 1.6 – 6.3 mm. The total duration of embryogenesis was 4 – 8 days, larval development was 86 – 125 days, and overall development was 90 – 127 days.

scholarly journals The vulnerability of species to range expansions by predators can be predicted using historical species associations and body size

2015 ◽  
Vol 282 (1812) ◽  
pp. 20151211 ◽  
Author(s):  
Karen M. Alofs ◽  
Donald A. Jackson
Keyword(s):  
Climate Change ◽  
Body Size ◽  
Body Length ◽  
Species Interactions ◽  
Environmental Changes ◽  
Regional Scale ◽  
Total Body Length ◽  
Relative Impact ◽  
Total Body ◽  
Historical Range

Climate change threatens species directly through environmental changes and indirectly through its effects on species interactions. We need tools to predict which species are most vulnerable to these threats. Pairwise species associations and body size are simple but promising predictors of the relative impact of species introduced outside of their historical ranges. We examined the vulnerability of 30 fish species to the impacts of three centrarchid predators that are being introduced to lakes north of their historical range boundaries. Species that were negatively associated with each centrarchid in their historical range were more likely to be lost from lakes with centrarchid introductions. Total body length was most important in predicting impact for the most gape-limited predator. At the regional scale, our method identifies those species most vulnerable to introductions facilitated by climate change and can easily be applied to a range of taxa undergoing range expansions.

scholarly journals Study of Morphomeristic and Habitat Tempuring Fish (Puntius spp) In Bangka Island Freshwater

2020 ◽  
pp. 48-62
Author(s):  
Andi Gustomi ◽  
Sri Dewi Dinata Putri ◽  
Sudirman Adibrata
Keyword(s):  
Water Quality ◽  
Body Length ◽  
Lateral Line ◽  
Secondary Data ◽  
Total Body Length ◽  
The Body ◽  
Survey Method ◽  
Dorsal Fin ◽  
Total Body ◽  
Head Height

This study aims to analyze the morphomeristic characteristics and habitat of Tempuring Fish (Puntius spp) in Bangka Island. The research was conducted from February to March 2020 at  Bangka Island. The study used a survey method using primary and secondary data. Based on the analysis of the morphomeristic characteristics, The kind of tempuring (Puntius spp) which found in the Freshwater of Bangka Island are Puntius lineatus dan Puntius johorensis. Puntius lineatus on Bangka Island has a total body length (TL) ranging from 67.13 to 75.80 mm; head height (HD) ranges from 10 -12 mm; height (BD) ranged from 15.47-18.60 mm; dorsal fin radius (DR) D.I-II. 8-9; and lateral line (LL) scales ranging from 24-25 mm; characterized by having 5 vertical black lines on the body. Puntius johorensis has a total body length (TL) ranging from 59.60-80.67mm; head height (HD) ranged from 10.40 -16.00 mm; height (BD) ranged from 14.00-28.44 mm; dorsal fin radius (DR) D.I-II. 6-10; and lateral line (LL) scales ranging from 25-30 mm; characterized by having 6 vertical black lines on the body. Ecology of Tempuring in Bangka Island freshwater when viewed from several water quality parameters, including temperature ranges from 29-31 °C, pH 5, water transparency 0.27 - 0.36 m, flow velocity 0.03-0.06 m / s, and TSS range from 4-19.2 mg / l. This indicates that the water quality of the Tempuring Fish habitat on Bangka Island is still in a good range. Morphomeristic; Tempuring; Puntius lineatus; Puntius johorensis; Bangka Island

scholarly journals Eco-ethology and trait distribution of two congeneric species – different strategies for the plague pest Acanthoplus discoidalis and the long-legged A. longipes (Orthoptera: Tettigoniidae)

2019 ◽  
Author(s):  
Erminia Conti ◽  
Giovanni Costa ◽  
Christian Mulder
Keyword(s):  
Body Size ◽  
Discriminant Analysis ◽  
Total Body Length ◽  
Species Level ◽  
The Body ◽  
Body Measurements ◽  
Congeneric Species ◽  
Trait Distribution ◽  
High Trait ◽  
Total Body

AbstractHigh trait variability among insects reflects a combination of intra- and inter-phenotype variations. Our aim was to assess if the trait distribution of body measurements can be more significantly influenced by sex (intraspecific variance) or by species (interspecific variance). To achieve this, we collected in Namibia tettigoniids belonging to two congeneric species of armoured ground crickets: Acanthoplus discoidalis (a significant pest in African croplands) and the long-legged Acanthoplus longipes. We measured in the field the total body length, the maximal pronotal width and length, and the femur and tibia lengths of the hind legs in 106 adults. We also derived the body mass from length and width values of the sampled specimens. No significant differences emerged in the two species by sex. A discriminant analysis clearly shows that at species level the locomotory traits as captured by tibia and femur lengths and the size traits as captured by body and pronotal lengths account for 99% of the total variance and clearly separate this pest from its congeneric species. In essence, it is not primarily the body size that differentiates the two species, but rather the pronotum and hind leg larger sizes of A. longipes. Different eco-ethological requirements, like the peculiarity of the calling song and the movements within the vegetation (and the consequently needed energy), independently force these functional traits.

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