Deep-Water Japanese Blunthorn Lobster Palinustus waguensis Kubo, 1963: First Estimates of Life History Parameters From the Southwest Coast of India

Palinustus waguensis Kubo, 1963, is the deep-sea Japanese blunthorn lobster belonging to the Family Palinuridae. It is a species that has been rarely reported, living in rocky habitats on deep-reef slopes at a depth of 100–250 m. An estimated catch of 100 kg of P. waguensis consisting of 113 males, 54 females, and 23 berried lobsters were collected during the first fortnight of January 2019 from the multi-day shrimp trawls operating off Sakthikulangara, Kerala, India. The mean total length was recorded as 112.3 mm in males, 102.6 mm in females. The parameters of the length-weight relationship were estimated as, a = 0.041, b = 2.84 for males and a = 0.05, b = 2.86 for females, which were not significantly different (P > 0.05, r2 > 0.90) between the males and females. The relative condition factor (K) in the males and females of P. waguensis ranged from 2.07–4.96 and 1.87–3.86, respectively, attributing to the better feeding efficiency in males. Food and feeding analysis revealed the dietary content as fish (53 %), crab (23.5 %), shrimp (7.8 %), digested matter (11.6 %), and foraminifera (4 %). Feeding intensity analysis about the fullness of the stomach showed the specimens bearing full stomachs (11.3 %), three-fourth full (9.9 %). Length at 50 % maturity (Lm50) was 96.9 mm. Gonado-somatic index (GSI) ranged from 3.39 to 8.13. The present study forms the first report on the biology of the deep-water Japanese blunthorn lobster, P. waguensis from India.

Download Full-text

Analysis of feeding behaviour and gastro-somatic index (GaSI) during different phases of breeding cycle of Monopterus cuchia (Hamilton, 1822) from Meghalaya, India

Journal of Applied and Natural Science ◽

10.31018/jans.v10i4.1907 ◽

2018 ◽

Vol 10 (4) ◽

pp. 1187-1191 ◽

Cited By ~ 2

Author(s):

Barisha Mary Kurbah ◽

Rabindra Nath Bhuyan

Keyword(s):

Relative Length ◽

Breeding Cycle ◽

Breeding Period ◽

Gut Content ◽

Insect Larvae ◽

Feeding Intensity ◽

Therapeutic Value ◽

Food And Feeding ◽

Food Fish ◽

Somatic Index

Fresh water mud eel (Monopterus cuchia) is considered as a highly nutritious food fish having therapeutic value. Therefore, a study has been conducted to acquire information on the food and feeding habit of this species in relation to reproductive cycle. Relative Length of the Gut (RLG), Gastro-Somatic Index (GaSI) and Analysis of gut content have been studied. It was observed that insect larvae and zooplankton comprised the major part of Gut content. GaSI values of 2.70 (Spent), 3.14 (Pre-Breeding), 2.13 (Breeding) and 2.56 (Post-Breeding) was observed to be different from all the four stages. Moreover, GaSI value was lowest during breeding period and highest during pre-breeding period. Lowest GaSI value of 2.13 indicates period of low feeding intensity which coincides with breeding period. Based on the obtained results, Monopterus cuchia was considered as a carnivorous fish since the RLG value is less than 1.

Download Full-text

Food and feeding habits of the greenback grey mullet Liza subviridis (Valenciennes, 1836) from Parangipettai waters, south-east coast of India

Indian Journal of Fisheries ◽

10.21077/ijf.2016.63.4.60271-20 ◽

2016 ◽

Vol 63 (4) ◽

Author(s):

M. Ashiq Ur Rahman ◽

P. S. Lyla ◽

S. Ajmal Khan

Keyword(s):

Feeding Ecology ◽

Food Item ◽

East Coast ◽

Feeding Habits ◽

Well Being ◽

Grey Mullet ◽

Feeding Intensity ◽

Food And Feeding ◽

Males And Females ◽

Sand Particles

The feeding ecology and prey preference of greenback grey mullet Liza subviridis (Valenciennes, 1836) were investigated in Parangipettai waters (11°29′25.55″N; 79°45′38.62″E) from May 2011 to April 2012. A total of 328 male and 360 female specimens of L. subviridis were analysed. Detritus and sand particles formed the major food item of L. subviridis in both sexes besides, diatoms, dinoflagellates, algae, zooplankton, foraminiferans, polychaetes and larval forms were also noticed and ranked respectively based on the quantities. Feeding intensity showed that the percentage of ‘empty’ stomachs varied from 7.2% (November 2011) to 19.3% (August 2011) and from 7.1% (March 2012) to 19.2% (August 2011) in males and females respectively whereas the ‘gorged’ stomach in males and females was in the ranges of 4.6% (March 2012) - 14.5% (December 2011) and 4.6% (September 2011) - 14.5% (April 2012). The gastrosomatic index of males and females ranged between 5.9% (October 2011) - 8.2% (May 2011) and 6.1% (March 2012) - 8.1% (May 2011) respectively. The results agree with the previous reports and extend the understanding on its well-being, reproductive seasons and stock of L. subviridis in Parangipettai waters.

Download Full-text

A PRELUDE ON THE BIOLOGY OF PUNTIUS AMPHIBIUS

Kongunadu Research Journal ◽

10.26524/krj179 ◽

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.

Download Full-text

Food and Feeding Habits of the Deep-Water Mud Shrimp (Solenocera melantho) of Visakhapatnam Coast, India

Notulae Scientia Biologicae ◽

10.15835/nsb9210051 ◽

2017 ◽

Vol 9 (2) ◽

pp. 161-168

Author(s):

Rama Chandra Ganesh PATURI ◽

Sarvabhowma Chakravarty MYLA

Keyword(s):

Feeding Habits ◽

Gut Contents ◽

Scavenging Activity ◽

Feeding Intensity ◽

Diet Preference ◽

Food And Feeding ◽

Fish Remains ◽

Males And Females ◽

Visakhapatnam Coast ◽

Food Consumed

The food and feeding habits of the shrimp Solenocera melantho off Visakhapatnam coast were studied qualitatively and quantitatively. Feeding intensity differs in relation to gender, size, season and stage of maturity. Detritus was the major component of the food consumed, followed by crustaceans, molluscs, foraminiferans, fish remains, eggs; sand was also found as one of the gut contents. Diet preference in males and females was similar, but varied with size and season. The index of preponderance of detritus was 50.88% in males and 47.16% in females. Variation in feeding intensity was noticed in relation to size, months and season. The overall feeding intensity in males and females was categorized as actively fed (21.52% and 40.78% respectively), moderately fed (22.07%, 19.72%) and poorly fed (14.07%, 27.03%) respectively. S. melantho may designate as an omnivorous detritivore with scavenging activity.

Download Full-text

An Analysis of Rotational Line Mating Using Computer Simulation

Acta Agraria Debreceniensis ◽

10.34101/actaagrar/16/3286 ◽

2005 ◽

pp. 35-39

Author(s):

Szilvia Szőke ◽

István Komlósi

Keyword(s):

Family Size ◽

First Generation ◽

Random Mating ◽

Rotational Line ◽

Gene Frequencies ◽

The Family ◽

Discrete Population ◽

Males And Females ◽

The Mean ◽

Better Than

In a simulation examination, we analyzed the effect of the family size and the rate of pairing on the survival of rare genes, to keep the level of variation of the genepool and to avoid the loss of alleles.The population size was 360 animals. In the simulation, we calculated on the basis of a discrete population. We placed the 360 animals into different clusters, with 3 types of frequencies of alleles and 3 types of groups. We assumed 2, 3 or 4 alleles in 8 loci. We generated 15 generations using the same mating and selection system used in practise. The simulation was written with Scilab 2.7.2 software, and evaluated with SPSS software.There were significant changes in the effect of family size on the genetic variation in the following cases: when the base population had the same gene frequencies in all loci, and when the gene frequencies were between 0.125-0.75. In these cases, we found that the smaller families (10 animals/cluster) were better than the larger families (30 or 90 animals/cluster). The first generation where there accured a loss of alleles was averagely earliest in larger families (90 animal/cluster). This average was 3.37 generations. When we are searched the effects of the different rates of pairing we found those cases most favourable when the ratio of males and females was 1:2 or 1:4 as compared to 1:9. The first generation where there was a loss of alleles was averagely earliest at the ratio of pairing male and females of 1:9 (the mean was 3.05 generations) when the frequency of the rarest allele was 0.0069.The recently introduced rotating-random mating system is an eligible method for small populations for the preservation of genes.

Download Full-text

Mantle Of The Expert Strategy Effectiveness In The Development Of Creative Thinking

10.31124/advance.7763264.v1 ◽

2019 ◽

Author(s):

Ibrahim Arman

Keyword(s):

Creative Thinking ◽

Role Playing ◽

Thinking Skills ◽

Measurement Unit ◽

Quasi Experimental ◽

Males And Females ◽

The Mean ◽

Girls School ◽

And Control ◽

Experimental Group

This study aimed at investigating the Effectiveness of Mantle of the Expert in creative thinking Skills among the 7th Graders. The study conducted on a sample of 7th Graders at Kober Secondary Boys School and Upper Kober Elementary Girls School. The study sample consisted of (100) students split into two groups (experimental and control). The researcher adopting the Torrance test for creative thinking the verbal image "A" by examining the tests used in the Ristow study (1988), Edwards and Baldov (1987) study, and designing a teacher book for the (engineering and measurement) unit according to the integration between the strategies of the mantle of the expert and role playing. This study adopted quasi-experimental design. It included two groups (experimental and controlled) in two branches (males and females) for each group. The controlled group was taught by using the traditional method whereas the experimental group by the mantle of the expert. The data analyzed using (ANCOVA) test to measure the differences in the development of creative thinking between the control and experimental groups. The Conclusions showed that there are statistically significant differences in the mean scores of the creative thinking test due to the way, gender and interaction between them. Based on the Conclusions of the study, the researcher recommends the need to use the mantles of the expert in the teaching of mathematics.

Download Full-text

Mudrock Microstructure: A Technique for Distinguishing between Deep-Water Fine-Grained Sediments

Minerals ◽

10.3390/min11060653 ◽

2021 ◽

Vol 11 (6) ◽

pp. 653

Author(s):

Shereef Bankole ◽

Dorrik Stow ◽

Zeinab Smillie ◽

Jim Buckman ◽

Helen Lever

Keyword(s):

Grain Size ◽

Deep Water ◽

Sedimentary Facies ◽

X Ray Diffraction ◽

Weak Current ◽

Large Area ◽

Fine Grained ◽

Mean Size ◽

The Mean ◽

Water Facies

Distinguishing among deep-water sedimentary facies has been a difficult task. This is possibly due to the process continuum in deep water, in which sediments occur in complex associations. The lack of definite sedimentological features among the different facies between hemipelagites and contourites presented a great challenge. In this study, we present detailed mudrock characteristics of the three main deep-water facies based on sedimentological characteristics, laser diffraction granulometry, high-resolution, large area scanning electron microscopy (SEM), and the synchrotron X-ray diffraction technique. Our results show that the deep-water microstructure is mainly process controlled, and that the controlling factor on their grain size is much more complex than previously envisaged. Retarding current velocity, as well as the lower carrying capacity of the current, has an impact on the mean size and sorting for the contourite and turbidite facies, whereas hemipelagite grain size is impacted by the natural heterogeneity of the system caused by bioturbation. Based on the microfabric analysis, there is a disparate pattern observed among the sedimentary facies; turbidites are generally bedding parallel due to strong currents resulting in shear flow, contourites are random to semi-random as they are impacted by a weak current, while hemipelagites are random to oblique since they are impacted by bioturbation.

Download Full-text

Variation within and between Rivers in Adult Size and Sea Age at Maturity of Anadromous Brown Trout, Salmo trutta

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f91-119 ◽

1991 ◽

Vol 48 (6) ◽

pp. 1015-1021 ◽

Cited By ~ 29

Author(s):

Jan Henning L'Abée-Lund

Keyword(s):

Brown Trout ◽

Sexual Maturity ◽

Salmo Trutta ◽

Adult Size ◽

Age At Maturity ◽

Migration Distance ◽

Spawning Area ◽

Brown Trout Salmo Trutta ◽

Males And Females ◽

The Mean

I compared adult size and sea age at sexual maturity among nine populations of anadromous brown trout, Salmo trutta, in two Norwegian rivers to determine the extent of inter- and intrariverine variations. Variation in the mean length of spawners and in the mean sea age at sexual maturity were mainly dependent on the variations found within rather than between rivers. Mean lengths and mean age at maturity of males increased significantly with increasing altitude of the spawning area and with migration distance in freshwater. In females, positive significant correlations were found with mean lengths and altitude of the spawning area and with mean sea age at maturity and both spawning site altitude and migration distance. Mean lengths and ages of males and females were not significantly correlated with the rate of water discharge in the streams during spawning. The size of gravel substrate for spawning was of minor importance in explaining interpopulation variation in mean female size. The increase noted in mean length and in mean sea age at maturity of both males and females is probably an adaptation to greater energy expenditure to reach the uppermost natal spawning areas.

Download Full-text

Disability in Schizophrenic Disorders

European Psychiatry ◽

10.1016/s0924-9338(09)70442-0 ◽

2009 ◽

Vol 24 (S1) ◽

pp. 1-1

Author(s):

J. Wancata ◽

M. Freidl ◽

F. Friedrich ◽

T. Matschnig ◽

A. Unger ◽

...

Keyword(s):

Hospital Admissions ◽

Social Consequences ◽

Subjective Burden ◽

Social Contacts ◽

Mothers And Fathers ◽

Duration Of Illness ◽

The Family ◽

Different Types ◽

Icd 10 ◽

The Mean

Aims:The purpose of this study was to investigate disability among patients suffering from schizophrenia and to identify predictors of disability.Methods:101 patients from different types of psychiatric services in Vienna and diagnosed with schizophrenia according to ICD-10 were included. They were investigates by means of 36-Item self-administered version of the WHO Disability Assessment Schedule II (WHO-DAS-II) and the PANSS-scale. Patients’ mothers and fathers were asked to fill in the Family Problem Questionnaire.Results:The mean total score of the WHO-DAS-II was 74.1 (SD 21.9). When using weighted sub-scores the highest disability scores were found for social contacts, participation in society and household (means 2.58, 2.57 and 2.51 respectively). Using logistic regression, overall disability was positively associated with patient's age, overall severity of symptoms (PANSS) and number of previous hospital admissions. Overall disability was not associated with duration of illness and or patient's gender. The subjective burden experienced by patients’ fathers and mothers were increased by reduced social contacts and impaired participation in society, while we could not find an association with other domains of patient's disability (understanding, mobility, self-care, household).Conclusions:This study shows that schizophrenia results in disability in several domains. Family caregivers’ burden was predominantly increased by social consequences of schizophrenia.

Download Full-text

Hidradenitis suppurativa: Wie die Partner von Betroffenen psychosozial beeinträchtigt werden

Karger Kompass Dermatologie ◽

10.1159/000516079 ◽

2021 ◽

pp. 1-3

Author(s):

Uwe Gieler

Keyword(s):

Disease Severity ◽

Social Life ◽

Hidradenitis Suppurativa ◽

Life Quality ◽

Psychosocial Burden ◽

Wide Range ◽

The Family ◽

The Mean ◽

Moderate Effect

Background: Hidradenitis suppurativa is a debilitating disease related to a great psychosocial burden in affected patients and subsequently also people around them. Patients’ partners as caregivers may indirectly experience wide range of devastating effects of the disease on their emotional and social life. Objective: The purpose of this study was to determine the QoL impairment in HS patients’ partners and to identify its aspects that are affected the most. Correlation between QoL burden and disease severity, duration, sex, age and smoking was also assessed. Methods: A total of 50 HS sufferers were assessed according to disease severity and their partners’ QoL was determined using the Family Dermatology Life Quality Index questionnaire. Results: The mean FDLQI for patients’ partners was 8.7 ± 6.8 points, indicating generally a moderate effect of HS on their life. Quality of partners’ life correlated significantly with disease severity but no correlation was found according to other factors. Conclusion: Hidradenitis suppurativa is a highly psychologically devastating disease not only for patients but also for their partners. It occurred to diminish partners’ QoL mostly by increasing daily expenditure but also other problems were often reported. Clinicians should be aware of these psychosocial implications, in order to provide optimal therapy of HS affected families by a multidisciplinary specialized management addressing both, patients and their cohabitants simultaneously.

Download Full-text