scholarly journals Taxonomy, length-weight relationship, food and feeding habits of flower moon crab Matuta planipes Fabricius, 1798 from coastal waters of Gopalpur, Odisha, India

2017 ◽  
Vol 64 (3) ◽  
Author(s):  
Durga Prasad Behera ◽  
S. Y. Tenjing ◽  
Rocktim Ramen Das ◽  
Laxman Nayak ◽  
D. Mohapatra
Keyword(s):  
Coastal Waters ◽  
Carapace Length ◽  
Feeding Habits ◽  
Carapace Width ◽  
Total Weight ◽  
Linear Pattern ◽  
Food And Feeding ◽  
Males And Females ◽  
Relationship Of ◽  
The Relationship

The relationship between carapace length (CL), carapace width (CW) and total weight (TW) in the flower moon crab Matuta planipes Fabricius, 1798 was studied and found to be CL = 0.144+1.319 CW and CL = 0.356+1.273 CL for males and females respectively. In case of the carapace width and total weight, the relationships were: TW = 0.272 CW3.011 and TW = 0.474 CW2.555 for males and females respectively. The relationships of carapace length and total weight were: TW = 0.128 CL2.917 for males and TW = 0.184 CL2.650 for females. A linear pattern was found between the relationship of CL and CW for M. planipes, whereas a curvilinear pattern was found between the relationship of CL/CW and TW in the present study. It was also observed that M. planipes is an opportunistic omnivore, seaweed being the most dominant food item followed by crustaceans, seagrass, amphipods and miscellaneous matter.

Population structure and morphometric variation in the sand-bubbler crab Scopimera crabricauda (Brachyura: Dotillidae)

2017 ◽  
Vol 67 (3-4) ◽  
pp. 319-330 ◽  
Author(s):  
Sana Sharifian ◽  
Vahid Malekzadeh ◽  
Ehsan Kamrani ◽  
Mohsen Safaie
Keyword(s):  
Carapace Length ◽  
Carapace Width ◽  
Total Weight ◽  
Morphometric Variation ◽  
Morphometric Characters ◽  
Mean Size ◽  
Study Population ◽  
One Year ◽  
The Persian Gulf ◽  
The Relationship

In the present study, population ecology and relationships between various morphometric characters of the sand-bubbler crab Scopimera crabricauda from the Persian Gulf (Iran) were studied. Crabs were collected monthly by excavating nine quadrats in high-density areas of open burrows at low, mid and high intertidal levels during spring low tides for one year. A total of 534 crabs was collected, of which 70% were males (and 30% females). Mean carapace width and total weight in both sexes showed significant differences. Crabs with a carapace width ranging from 5 to 7 mm were the dominant crabs in the population. The highest numbers of crabs were found in the higher intertidal area. The mean size of crabs decreased towards the sea. The aggregation of small crabs was found towards sea in female crabs. Juveniles were abundantly found from January to March whereas the sub-adults and adults were mostly found from April to January. The carapace length to carapace width relationship differed between males and females, as did the carapace width and carapace length to total weight relationships. Finally, the relationship between carapace width and weight for both sexes showed that the growth of this species is allometric.

scholarly journals Cephalic Indices of Some Birds in Relation to Their Feeding Habits

1970 ◽  
Vol 1 ◽  
pp. 49-55 ◽  
Author(s):  
Pramod Kumar Kushwaha
Keyword(s):  
Food Habits ◽  
Feeding Behaviour ◽  
Feeding Habits ◽  
Numerical Procedure ◽  
Special Structure ◽  
Taxonomic Character ◽  
Food And Feeding ◽  
Relationship Of ◽  
The Relationship ◽  
Shape And Size

The shape and size of skull and arrangement of mouth parts play an important role to determine the food and feeding behaviour of birds. The cephalic or head index is a ratio between breadth and length of head. The numerical procedure of cephalic indices of birds represent an important taxonomic character and also help to establish the relationship of feeding habits to visual and acoustic organs of birds. Birds have evolved a great variety of beaks according to their food habits. Due to different food habits found in birds, they possess various types of beaks of special structure. This article deals with cephalic indices of some birds of Uttar Pardesh (India) in relation to their feeding habits. Keywords Skull, bill, measurement, ratio, relation DOI: http://dx.doi.org/10.3126/av.v1i0.5311 Academic Voices 2011; 1: 49-55

A PRELUDE ON THE BIOLOGY OF PUNTIUS AMPHIBIUS

2017 ◽  
Vol 4 (1) ◽  
pp. 69-72
Author(s):  
Munisha Murali S ◽  
Sheeba S
Keyword(s):  
Sex Ratio ◽  
Feeding Habits ◽  
Monsoon Season ◽  
Gut Content ◽  
Significant Difference ◽  
Active Feeding ◽  
Food And Feeding ◽  
Males And Females ◽  
Relationship Of ◽  
Somatic Index

Knowledge on fish biology is essential for improving aquaculture. The present study was focused on the biology of Puntiusamphibius. The fishes were collected from a freshwater body in parlance known as “Arappa”, located in Thalikulam at Thrissur district in Kerala. This water body is in the vicinity of the sea anddebouches into the marine during monsoon season. In the present investigation 106 fishes were collected during March to August 2006. The study revealed that there was no significant difference observed among the length weight relationship of males and females. Composition of gut content showed that it is a selectivefeeder of Bacillariophyceae and a pronounced omnivore. The gastro-somatic index of female and male was high during May indicating the active feeding during breeding.The sex ratio between males and females was variable and female dominated over males. The fecundity of fish was proportional to the weight of the ovary. Gonado-somatic index was comparatively high during spawning seasons. This is a preliminary lesson on the reproductive biology and certain distinctive characters such as length-weight and food and feeding habits of Puntius amphibius.

scholarly journals POPULATION BIOLOGY OF SEABOB-SHRIMP Xiphopenaeus kroyeri (Heller, 1862) CAPTURED ON THE SOUTH COAST OF PERNAMBUCO STATE, NORTHEASTERN BRAZIL

2014 ◽  
Vol 62 (4) ◽  
pp. 331-340 ◽  
Author(s):  
Danilo Francisco Corrêa Lopes ◽  
Emanuell Felipe Beserra da Silva ◽  
Silvio Ricardo Maurano Peixoto ◽  
Flavia Lucena Frédou
Keyword(s):  
Population Dynamics ◽  
Population Biology ◽  
Carapace Length ◽  
Total Weight ◽  
South Coast ◽  
Northeastern Brazil ◽  
Southern Coast ◽  
Xiphopenaeus Kroyeri ◽  
Males And Females ◽  
The Relationship

This paper aims to describe the population dynamics and to evaluate the stock of the seabob-shrimp Xiphopenaeus kroyeri on the coast of Pernambuco. Sampling was carried out between August/2011 and July/2012 in Sirinhaém, southern coast of Pernambuco. A total of 1201 individuals were analyzed, 673 females and 528 males. Total length (Lt) of females varied from 4.5 to 13.5 cm while the Lt of males ranged between 4.0 and 11.0 cm. The relationship between the Lt and carapace length and Lt and total weight showed negative allometry (males, females and pooled sexes). The slope of the curve "b" was statistically different between males and females for both relationships. Females mature with 8.90 cm. Asymptotic length L∞ was lower for males than for females (12.26 to 14.79 and 10.72 to 11.5 cm, respectively), K was similar between sexes (1.00-2.04 and 1.00-2.63 cm/year-1 respectively) as well as the longevity and size at 1st capture (1.50 to 1.97) years and 7.9 to 8.9 cm for males and females, respectively). The results indicate that X. kroyeri in the region is not overexploited for males, however considering females and pooled sexes the stock is near to being fully exploited.

scholarly journals Body Weight, Carapace Length and Width Relationship and Condition Factor of the Mud Crab Scylla serrata (Forskal) in Mangrove Ecosystem

2017 ◽  
Vol 9 (3) ◽  
pp. 338-343 ◽  
Author(s):  
Sarvabhowma Chakravarty MYLA ◽  
Vijaya Bharathi TIRUMANI ◽  
Rama Chandra Ganesh PATURI
Keyword(s):  
Carapace Length ◽  
Condition Factor ◽  
Carapace Width ◽  
Scylla Serrata ◽  
Regression Equations ◽  
Allometric Growth ◽  
Mud Crab ◽  
Relative Condition Factor ◽  
Males And Females ◽  
Relationship Of

The relationship of length-weight and width-weight of the carapace and the relative condition factor of mud crab Scylla serrata from Coringa Wildlife Sanctuary (Andhra Pradesh, India) was the subject of present study. Significant difference in both males and females was observed between carapace length-weight, carapace width-weight with a linear relationship. The regression values of both the sexes were found to be statistically significant. The regression equations calculated for length-weight were W= 0.00000178 L 3.1139 (r= 0.95) for males, W= 0.00000520 L 2.8056 (r=0.94) for females and for sexes combined it was W = 0.0000297 L 2.9891(r= 0.94).  In case of carapace width-weight relationship of males, females and sexes combined the regression equations were W= 0.00000121 CW 3.0426 (r= 0.92), W= 0.00000178 CW 2.775 (r=0.93) and W = 0.00000204 CW 2.9210(r= 0.92) respectively. The male crabs showed positive allometric growth whereas female had negative allometric growth. Analysis of covariance confirmed remarkable difference between males and females in the growth pattern. The mean relative condition factor (Kn values) of both males and females and of the pooled sexes ranged from 0.680 (April) to 1.029 (November). A gradual raise in Kn values was observed from small- to big- sized crabs in both the sexes. Peak values were observed in 12.0-13.9 cm size group in November.

scholarly journals A multivariate study of variation in two species of rock crab of the genus Leptograpsus

1974 ◽  
Vol 22 (3) ◽  
pp. 417 ◽  
Author(s):  
NA Campbell ◽  
RJ Mahon
Keyword(s):  
Carapace Length ◽  
Carapace Width ◽  
The Body ◽  
Canonical Variate ◽  
Multivariate Approach ◽  
Maximum Width ◽  
Multivariate Study ◽  
Rock Crab ◽  
Males And Females ◽  
Colour Form

A multivariate approach has been used to study morphological variation in the blue and orange-form species of rock crab of the genus Leptograpsus. Objective criteria for the identification of the two species are established, based on the following characters: width of the frontal region of the carapace; width of the posterior region of the carapace (rear width); length of the carapace along the midline; maximum width of the carapace; and the depth of the body. The first canonical variate, which differentiates between the two species, represents a contrast between the carapace width relative to the width of the front lip and the depth of the body; the blue-form species has a greater relative carapace width than has the orange form. The second canonical variate, which presents a contrast between the rear width and the carapace length, identifies males and females within each species; males have a greater relative carapace length than have females. All individuals, including 20 not used in the study, were correctly identified for colour form. The clear separation of the blue and orange forms achieved by canonical analysis supports the previously determined specific status of the two forms.

scholarly journals A comparative study of the brains in pleuronectidae

1937 ◽  
Vol 122 (828) ◽  
pp. 308-343 ◽  
Keyword(s):  
Comparative Study ◽  
Medulla Oblongata ◽  
Royal Society ◽  
Feeding Habits ◽  
Serial Sections ◽  
Naked Eye ◽  
The Family ◽  
Relationship Of ◽  
The Relationship ◽  
The Brain

Part I. The Medulla Oblongata, And Its Variations Acoording To Diet And Feeding Habits In previous communications to this Society the relationship of the habits of feeding and diet to the form and pattern of the medulla oblongata has been described in the cyprinoids, clupeids, and gadoids (Evans, 1931, 1932, 1935). This research takes up a similar study of the brain of the Pleuronectidae. The expense has been borne by a grant from the Royal Society for which the author tenders his grateful thanks. It has seemed to be desirable to extend the observations to the fore- and mid-brain, as in some members of the family these present a very marked development. In order to elucidate some of the problems that arise I have also studied the brain of the eel, and some interesting conclusions have resulted. We find, as a result of examination by the naked eye and of serial sections, that we can divide the following species into four groups as follows: I. The sole, Solea vulgaris .

Carapace width-weight relationships of blue swimmer crab Portunus armatus (A. Milne-Edwards, 1861) (Crustacea: Brachyura: Portunidae) in southwestern Australia: influences of sex, decadal change, environment, and season

2020 ◽  
Vol 40 (5) ◽  
pp. 526-533
Author(s):  
Danielle J Johnston ◽  
Daniel E Yeoh
Keyword(s):  
Carapace Width ◽  
Sampling Period ◽  
Change Environment ◽  
Southwestern Australia ◽  
Natural Logarithm ◽  
Stock Assessments ◽  
Males And Females ◽  
The Relationship ◽  
Direct Applicability ◽  
Fishery Species

Abstract The relationship between carapace width (CW) and weight (W) of the blue swimmer crab Portunus armatus (A. Milne-Edwards, 1861) was determined for southwestern Australian populations using measurements collected over two decades from a range of nearshore marine and estuarine environments. A strong and significant positive linear relationship occurred between the natural logarithm (ln) of CW and ln(W) for both sexes overall and individually for males and females (R2 = 0.985–0.987; P < 0.001). The relationships were: overall ln(W) = −10.2262 + 3.1708 ln(CW); males ln(W) = −10.4641 + 3.234 ln(CW), and females ln(W) = −10.0595 + 3.1246 ln(CW). Significant differences in the relationship were detected between sexes, decadal sampling periods, environments, and seasons (P < 0.001), with sex and decadal period being most influential. Males were heavier than females at any given CW, which was most apparent at larger (>100 mm CW) sizes. Crabs were also generally heavier at CW in a recent sampling period (2014–2019) than historically (1995–2000), with the greatest decadal differences occurring in the estuarine environment. These relationships have direct applicability for use in stock assessments of this valuable fishery species. Moreover, observed changes in the CW-W relationships over time highlight the importance of regularly reviewing biological parameters used in fisheries assessments, particularly in response to climate change as in the case of southwestern Australia.

scholarly journals Computed Tomography Image Analysis and Clinical Correlations of Retromaxillary Cells

2020 ◽  
pp. 014556132093696
Author(s):  
Cheng Cao ◽  
Fangwei Zhou ◽  
ZhiYan Song ◽  
Zezhang Tao ◽  
Yu Xu
Keyword(s):  
Computed Tomography ◽  
Paranasal Sinus ◽  
Maxillary Sinusitis ◽  
Anatomical Variation ◽  
Sinus Surgery ◽  
Tomography Image ◽  
Males And Females ◽  
Computed Tomography Image ◽  
Relationship Of ◽  
The Relationship

Objective: This study aimed to investigate and analyze the anatomic characteristics of the retromaxillary cell (RMC) by using computed tomography (CT) images of paranasal sinuses and to improve its identification with ethmomaxillary sinus (EMS). Methods: The paranasal sinus CT scans of 441 outpatients or inpatients in our hospital from January 2018 to October 2018 were analyzed. The incidence of RMC, EMS, Haller cell, imaging anatomical characteristics, and morphological manifestations were observed via sinus CTs. The relationship of RMC and ipsilateral maxillary sinusitis was analyzed. Results: The incidence of RMC is 83.90% (740/882). The incidence of males and females was 83.81% (414/494) and 84.02% (326/388), respectively. The incidence of bilateral (72.79%, 321/441) was much higher than that of unilateral (22.22%, 98/441). The lateral extension of the RMC ranged from 1.18 to 13.31 mm, with an average of 6.10 ± 2.03 mm. The incidence of ipsilateral maxillary sinus opacification on the RMC sides and non-RMC sides has no significance difference (χ2 = .054, P = .459). The incidence of Haller cell and EMS decreased significantly in the presence of RMC ( P < .01). Conclusion: The RMC is an anatomical variation originating from posterior ethmoid cells, which is commonly encountered in the clinic. The pneumatization of RMC is highly variable, and a bilateral is common. During endoscopic sinus surgery, it is necessary to carefully identify such an air cell to ensure the complete opening of the paranasal sinus during surgery.

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