The New South Wales Tiger Flathead, Neoplatycephalus macrodon (Ogilby). I. Biology and Age Determination

1951 ◽  
Vol 2 (2) ◽  
pp. 117 ◽  
Author(s):  
WS Fairbridge
Keyword(s):  
Age Groups ◽  
Age Determination ◽  
Sampling Technique ◽  
Final Analysis ◽  
Point Of View ◽  
Fish Length ◽  
Important Species ◽  
Trawl Fishery ◽  
The North ◽  
Catch Statistics

In a previous paper the catch statistics of the east Australian trawl fishery (Fairbridge 1948) were discussed, and in the present work, the biology of the most important species, the tiger flathead, is examined in greater detail. An age determination technique is developed for this species, and the age composition of the catch of recent years is analysed. The sampling technique carried out at the Sydney Fishmarkets is described and tested. The results are given of the first experimental trawling in Australian waters using a fine-meshed cover on the codend. The biology of the species is studied, chiefly from the point of view of establishing the age determination technique and the final analysis of the catch. Spawning is protracted, lasting throughout the six warmer months, and takes place throughout the geographical range of the species. The males spawn first in their second year, the females in their third or fourth. The "condition" (K) of the gutted fish is lowest in February, after spawning. It is probable that there is a single, genetically uniform stock, with a single centre of maximum occurrence. The younger age-groups probably do not undertake extensive coastwise movement; as a result, local areas are liable to become relatively depopulated by heavy fishing. The method of collecting and reading the flathead otolith is described. The otolith is found to grow isauxetically above a fish-length of 10 cm., and the technique of back-calculation is therefore used as an aid in age determina- tion. The otolith in this species is certainly not as clear to interpret as that of the North Sea plaice, but is probably comparable with that of the cod or hake.

Palynostratigraphy and palaeoclimate of the Valanginian– Cenomanian subsurface succession in Hamza-1X well, Matruh Basin, Egypt

2020 ◽  
Vol 297 (2) ◽  
pp. 173-191 ◽  
Author(s):  
Ibrahim M. Ied ◽  
Sameh S. Tahoun ◽  
Walid A. Makled
Keyword(s):  
Age Determination ◽  
Pollen Grains ◽  
Point Of View ◽  
Western Desert ◽  
Dinoflagellate Cysts ◽  
Spores And Pollen ◽  
Dinoflagellate Cyst ◽  
The North ◽  
Assemblage Zone ◽  
Stratigraphic Succession

Diverse palynomorph assemblages of spores, pollen grains and dinoflagellate cysts have been yielded from the palynological analyses of 115 ditch cutting samples covering the Valanginian– Cenomanian succession encountered in Hamza-1X well, Matruh Basin, north Egypt. The complex sit- uations in the north Western Desert requires more revisited palynozones for better understanding of the subsurface successions therein. Consequently, the first downhole palyno-events will be very helpful in solving some issues concerning the age determination and correlation. Seventy palynomorph species (47 spores and pollen grains; 23 dinoflagellate cyst species) were identified from all the productive samples which used to divide the studied succession into numerous sporomorph and dinoflagellate biozones based on the last occurrence datum for the recovered marker taxa. Four sporomorph inter- val biozones and six dinoflagellate cyst interval biozones were differentiated from the same studied stratigraphic succession. The four sporomorph biozones are presented, in ascending order as follows: Aequitriradites spinulosus and Impardecispora apiverrucata Interval Zone (late Valanginian– early Barremian), Pilosisporites trichopapillosus I. Z. (late Barremian), Murospora florida I. Z. (early Aptian–late Aptian), and Elaterosporites klaszii I. Z. (early Albian– early Cenomanian). The seven dinoflagellate cysts biozones are Muderongia simplex I. Z. (late Valanginian–early Barremian), Pseudoceratium anaphrissum I. Z. (late Barremian– early Aptian), Cribroperidinium edwardsii I. Z. (early Aptian), Subtilisphaera perlucida I. Z. (late Aptian), Oligosphaerdium complex I. Z. (early– late Albian), Dinopterygium cladoides and Coronifera oceanica Assemblage Zone (early Cenomanian). From the palaeoclimatic point of view, the studied interval could be differentiated into two climatic intervals; the lower arid interval that comprises the Alam El Bueib Formation and dominated by the arid xerophyte elements like Sphaeripollenites and Classopollis. The upper humid interval represents the Alamein, Dahab, Kharita and Bahariya formations that is dominated by the humid hygrophyte elements, such as Murospora, Crybeolsporites, Elaterosporites, Afropollis and Deltoidospora.

The Sea Garfish, Reporhamphus melanochir (Cuvier & Valenciennes) (Hemi-ramphidae), in South Australia: Breeding, Age Determination, and Growth Rate

1958 ◽  
Vol 9 (1) ◽  
pp. 60 ◽  
Author(s):  
JK Ling
Keyword(s):  
Age Groups ◽  
Age Determination ◽  
South Australia ◽  
Management Policy ◽  
Spawning Period ◽  
Catch Statistics ◽  
Average Size ◽  
First Time ◽  
Second Period ◽  
Sexually Mature

There are seven macroscopic gonad stages recognizable in male sea garfish. and eight in females with which ova diameter measurements have been correlated . In South Australia the spawning period lasts from late September to early March. and activity is most intense during October and November . A second period of breeding activity may occur in February . A few females are sexually mature at 2 years. but the majority do not spawn for the first time until the end of 3 years .This applies also to males. A latent maturation cycle is demonstrated in immature female garfish. The use of otoliths for age determination is described and the method validated by Petersen length frequency polygons. The rate of growth has been deduced from calculated intermediate lengths of younger garfish, based on an otolith lengthlfish length relation and the mean lengths of older age groups. The weight of the garfish varies as the cube of the length. Females attain a larger average size than males after the third pear. Gulf St. Vincent females grow faster than those in other regions; males, however, are variable. Application of these results to a management policy for the commercial fishery is severely restricted by the inadequate official catch statistics. However, it is recommended that netting of garfish in Coffin's Bay be prohibited, but that no change in the minimum legal length should be made for the present.

survival of small-spotted catshark (scyliorhinus canicula) discarded by trawlers in the cantabrian sea

2005 ◽  
Vol 85 (5) ◽  
pp. 1145-1150 ◽  
Author(s):  
c. rodríguez-cabello ◽  
a. fernández ◽  
i. olaso ◽  
f. sánchez
Keyword(s):  
Survival Rate ◽  
Survival Rates ◽  
Fish Length ◽  
Significant Percentage ◽  
Trawl Fishery ◽  
Scyliorhinus Canicula ◽  
The North ◽  
Sorting Time ◽  
Males And Females ◽  
North Of Spain

discards represent a significant percentage of the total catches (up to 35%) in the north of spain trawl fishery. in the cantabrian sea (southern area of the bay of biscay), the estimated average total annual catch of small-spotted catshark (scyliorhinus canicula) is approximately 1500 tn, from which 80% is discarded. several experiments have been carried out in order to estimate the survival-rate of the small-spotted catshark caught by commercial trawlers in this area. the estimate of mean survival-rate from tagging surveys was 90% while from commercial trawlers it was 78%. several factors potentially influencing the survival-rate (sex, length, maximum depth fished, sorting time and trawl duration) were examined. no significant differences in survival-rates were found between males and females, and no strong relationships between survival-rate and depth fished, sorting time or trawl duration were evident. in commercial trawlers survival-rate was not dependent on the fish length.

scholarly journals Crustacean fishery with bottom traps in an area of the southern Tyrrhenian Sea: species composition, abundance and biomass

2004 ◽  
Vol 5 (2) ◽  
pp. 15 ◽  
Author(s):  
L. CASTRIOTA ◽  
M. FALAUTANO ◽  
T. ROMEO ◽  
J. FLORIO ◽  
P. PELUSI ◽  
...  
Keyword(s):  
Species Composition ◽  
Eastern Coast ◽  
Tyrrhenian Sea ◽  
Bathymetric Range ◽  
Important Species ◽  
Trawl Fishery ◽  
The North ◽  
Student’S T ◽  
One Year ◽  
Post Hoc

The north-eastern coast of Sicily is characterized by deep, steep bottoms, not easily exploitable by trawl fishery. In this area few fishermen use bottom traps to catch shrimps and Norway lobsters. Our studies were aimed at identifying the species’ composition, abundance and biomass of crustaceans exploitable by bottom traps in this area. Monthly samples over one year were obtained from two lines of 30 baited traps each, at depths between 100 and 500 m. One line was placed in an area usually exploited by this fishery; the other line was used in the unexploited deepest bottoms. Trapped specimens were counted and weighed. ANOVA test, post hoc multiple comparisons and Student’s t test were applied on abundance and biomass data, for testing differences between areas, among seasons and species. During 22 fishing days, 23 species characteristic of the bathyal mud assemblage were caught, 8 of which were not considered commercial. Plesionika edwardsii was the most important species, recorded in the whole bathymetric range investigated; Nephrops norvegicus was significantly higher in terms of biomass in the unexploited area. The discard, of slight importance, was mostly represented by the crab Liocarcinus depurator. Spring season yielded the best catches in both areas, showing the highest values for both abundance and biomass

Assessment of the quality of life of respondents working on a rotational basis in the Far North (on the example of the Khanty-Mansiysk Autonomous Okrug — Ugra)

2021 ◽  
pp. 66-75
Author(s):  
E. G. Ivanova ◽  
E. V. Makarova
Keyword(s):  
Quality Of Life ◽  
Age Groups ◽  
Health Indicators ◽  
Climatic Conditions ◽  
Point Of View ◽  
The Body ◽  
Far North ◽  
The North ◽  
Sf 36

Introduction. Currently, one of the directions in medicine is the study of the issue of the quality of life of patients. This indicator is a complex characteristic in terms of the physical and psychological component of health. The state of health is influenced by many factors and one of them is the peculiarities of the climatogeographic region where a person lives. The conditions of the Far North are characterized by extreme climatic and industrial conditions. In such areas, a rotational method is used, which assumes distance from the permanent place of residence. Thus, the influence of the climatic conditions of the Far North on the quality of life of respondents working on a rotational basis determines the relevance of this study, which was carried out in the Khanty-Mansi Autonomous Okrug — UGRA (KhMAO — Ugra).The aim of the research was to study the quality of life of respondents working on a rotational basis in the Far North.Materials and methods. Only men took part in this study — 207 people working in the conditions of the Far North (KhMAO — Ugra) on a rotational basis. All respondents were divided into four age groups: group 1 — 24–28 years old (n=36); group 2 — 29–34 years old (n=63); group 3 — 35–38 years old (n=78); group 4 — 39–45 years old (n=30). The duration of follow-up ranged from 1 to 3 months. A simple survey of all respondents was used to obtain information. In order to study the quality of life (QL) of those working in the Far North on a rotational basis, the MOS SF-36 questionnaire was used. Statistical analysis was performed using the STATGRAPHICS 12 Plus for Windows software in accordance with the general principles of QOL research in medicine.Results. With a long stay in the Far North, a restructuring of the adaptive mechanisms is noted, which goesthrough several stages: initially, minor physiological changes are noted that do not lead to serious changes in the body systems. The second stage is characterized by stable working capacity, but already there is a decrease in health indicators on all scales of the SF-36 questionnaire. The third stage or period of uncompensated fatigue is characterized by a significant decrease in psychological and physical indicators. Conclusion. Unfavorable from the point of view of the medico-biological aspect in the work on a rotational basis in the Far North is the coincidence of the period of work with the phase of the greatest adaptation falling on the first month of stay in the North.

scholarly journals Estimating selectivity of experimental diamond (T0) and turned mesh (T90) codends in multi-species Mediterranean bottom trawl

2020 ◽  
Author(s):  
ANDREA PETETTA ◽  
BENT HERRMANN ◽  
MASSIMO VIRGILI ◽  
ROCCO De MARCO ◽  
GIOVANNI CANDUCI ◽  
...  
Keyword(s):  
Mesh Size ◽  
Bottom Trawl ◽  
Size Selectivity ◽  
Important Species ◽  
Trawl Fishery ◽  
The North ◽  
Common Squid ◽  
Commercially Important ◽  
The Mediterranean ◽  
The Difference

The effect of shifting from a diamond mesh codend (T0) to a 90° turned mesh codend (T90) on the size selectivity of seven commercially important species in the Mediterranean bottom trawl fishery was evaluated. During sea trials conducted in the north-western Adriatic, two experimental codends made of 54 mm nominal mesh size netting that differed only in mesh configuration were alternately mounted on the same trawl. Overall, the size selectivity was significantly improved for all the species analysed, shifting from T0 to T90. The difference in the average expected L50values between T90 and T0 was particularly marked in European hake (Merluccius merluccius, 21.26 vs 11.26 cm total length), common squid (Loligo vulgaris, 12.06 vs 7.88 cm mantle length) and mantis shrimp (Squilla mantis, 20.78 vs 13.35 mm carapace length). Both codends had an excessive size selectivity especially for red mullet (Mullus barbatus), Mediterranean horse mackerel (Trachurus mediterraneus) and whiting (Merlangius merlangus), thus involving a commercial loss. These findings demonstrate the efficiency of the T90 codend tested at excluding undersized specimens, especially of hake, whose average L50was above the minimum conservation reference size of 20 cm. The adoption of this practical and inexpensive solution could help improve the management of the demersal resources targeted by the Mediterranean bottom trawl fishery.

An Ultrastructural Study of the Proliferation Patterns of the Reserve Cells of the Human Cervix Uteri

1972 ◽  
Vol 30 ◽  
pp. 80-81
Author(s):  
Takanori Sohda ◽  
Hiroshi Saito ◽  
Goro Asano ◽  
Katsunari Fukushi ◽  
Katsuya Suzuki ◽  
...  
Keyword(s):  
Ultrastructural Study ◽  
Age Groups ◽  
Point Of View ◽  
University Hospital ◽  
Cervix Uteri ◽  
Morphological Aspect ◽  
Functional Aspect ◽  
Pathological Conditions ◽  
Human Cervix ◽  
Morphological Patterns

Recently, the functional aspect as well as morphological aspect of the reserve cells in the cervix uteri drew much attention in view of the carcinogenesis in squamocolumunar junction. In this communication, the authors elucidate the ultrastructural features of the reserve cells in patients of various age groups visiting our university hospital and affiliated hospital.From conventional light microscopic point of view, the reserve cells tend to be pronounced in various pathological conditions, such as the persisting inflammation, proliferative disorders and irritation of hormones. The morphological patterns of the reserve cells from various stage and degree of irritation were observed.

Past Verses Present; Metamorphosis in Different Spheres of Guwahati: A Study of Srutimala Duara’s Mindprints of Guwahati

2020 ◽  
Vol 8 (2) ◽  
pp. 13
Author(s):  
Ankita Pandey
Keyword(s):  
Point Of View ◽  
Areca Nut ◽  
Medieval Period ◽  
River Bank ◽  
North East India ◽  
North East ◽  
The North ◽  
Indian State ◽  
The City ◽  
Beautiful City

Guwahati derives its name from the Assamese word “Guwa” means areca nut and “Haat” means market. However, the modern Guwahati had been known as the ancient Pragjyotishpura and was the capital of Assam under the Kamrupa kingdom. A beautiful city Guwahati is situated on the south bank of the river Bramhaputra. Moreover, It is known as the largest city in the Indian state of Assam and also the largest metropolis in North East India. It has also its importance as the gateway to the North- East India. Assamese and English are the spoken languages in Guwahati.  In 1667, the Mogul forces were defeated in the battle by the Ahom forces commanded by Lachut Barphukan. Thus, in a sense Guwahati became the bone of contention among the Ahoms, Kochas and the Moguls during the medieval period.  Guwahati the administrative headquarters of Lower Assam with a viceroy or Barbhukan was made by the Ahom king.  Since 1972 it has been the capital of Assam. The present paper will discuss the changes happened in Guwahati over the period of late 1970s till the present time. It will focus on the behavior of people, transformed temples, Panbazar of the city, river bank of Bramhaputra, old Fancy Bazaar, chaotic ways, festivals and seasons including a fifth man made season etc. It will also deal how over the years a city endowed with nature’s gifts and scenic views, has been changing as “a dirty city”. Furthermore, it will also present the insurgencies that have barged into the city. The occurrence of changes will be discussed through the perspective and point of view of Srutimala Duara as presented in her book Mindprints of Guwahati.

GAMBARAN PENYAKIT PERIODONTAL PADA PENDERITA DIABETES MELITUS DI RUMAH SAKIT UMUM PUSAT PROF. DR. R. D KANDOU MANADO

e-GIGI ◽  
2015 ◽  
Vol 3 (2) ◽  
Author(s):  
Ezra G. R. Tambunan ◽  
Karel Pandelaki ◽  
Christy N. Mintjelungan
Keyword(s):  
Diabetes Mellitus ◽  
Periodontal Disease ◽  
Metabolic Diseases ◽  
Age Groups ◽  
Evaluation Criteria ◽  
Sampling Technique ◽  
Oral Health Problem ◽  
Result Show ◽  
Patients With Diabetes ◽  
Diabetes Melitus

Abstract: Diabetes mellitus (DM) is a group of metabolic diseases with characteristic hyperglycemia that occurs due to insulin secretion, insulin action or both. This disease affects many societies and continuously growing in Indonesia. Periodontal disease is an oral health problem which has a relatively high prevalence in the community where periodontal disease in all age groups in Indonesia.The purpose of this study was to determine the periodontal disease in patients with diabetesmellitus in RSUP Prof. dr. R. D. Kandou Manado. This descriptive study has 68 sample taken with total sampling technique. The sample is examined using evaluation criteria gingival index and CPITN index. The result show that subjects with periodontitis with a score of 4 is the highest as many as 18 people (44%) and subject with a score of 2 is that at least as many as 8 people (19.5%). And subjects with bad gingivitis is the highest as many as 10 people (52.6%) and subject with the good gingivitis is the at least as many as 5 people (26.3%). Based on the result of this study, periodontal disease in patients with diabetes mellitus in RSUP Prof. Dr. R. D. Kandou most that periodontitis with the number of 41 people (68.3%) compared to gingivitis which is just as many as 19 people (31.7%)Keywords: diabetes mellitus, periodontitis, gingivitis, periodontalAbstrak:Diabetes Melitus (DM) merupakan suatu kelompok penyakit metabolik dengan karakteristik hiperglikemia yang terjadi karena sekresi insulin, kerja insulin atau kedua-duanya. Penyakit ini merupakan penyakit yang banyak diderita kalangan masyarakat dan terus berkembang di Indonesia. Penyakit periodontal merupakan masalah kesehatan gigi dan mulut yang memiliki prevalensi cukup tinggi di masyarakat dimana penyakit periodontal pada semua kelompok umur di Indonesia.Tujuan penelitian ini adalah untuk mengetahui penyakit periodontal pada penderita diabetes mellitus di RSUP Prof. dr. R. D. Kandou Manado. Jenis penelitian ini adalah penelitian deskriptif dengan jumlah sampel 60 orang yang diambil dengan teknik total sampling. Sampel diperiksa dengan menggunakan kriteria penilaian indeks gingiva dan indeks CPITN. Hasil menunjukkan bahwa yang mengalami periodontitis dengan skor 4 adalah yang paling tinggi yaitu sebanyak 18 orang (44%), dan subjek yang mengalami skor 2 adalah yang yang paling sedikit yaitu sebanyak 8 orang (19.5%). Sedangkan yang mengalami gingivitis yang paling tinggi yaitu gingivitis buruk sebanyak 10 orang (52.6%) dan yang paling sedikit adalah yang mengalami gingivitis ringan yaitu sebanyak 5 orang (26.3%). Berdasarkan hasil penelitian ini dapat disimpulkan bahwa penyakit periodontal yang paling banyak ditemui pada penderita diabetes melitus di RSUP Prof. Dr. R. D. Kandou Manado adalah penyakit periodontitis yaitu sebanyak 41 orang (68.3%) dan yang paling sedikit adalah gingivitis yaitu sebanyak 19 orang (31.7%)Kata kunci: diabetes melitus, periodontitis, gingivitis, periodontal

Integrated waste water management for a small river basin - a case study

1998 ◽  
Vol 38 (11) ◽  
pp. 87-95
Author(s):  
R. Fenz ◽  
M. Zessner ◽  
N. Kreuzinger ◽  
H. Kroiss
Keyword(s):  
Waste Water ◽  
Water Management ◽  
River Basin ◽  
Rural Areas ◽  
Urban Areas ◽  
Waste Water Treatment ◽  
Point Of View ◽  
Political Issue ◽  
The North ◽  
Waste Water Management

In Austria approximately 70% of the population is connected to sewerage and to biological waste water treatment plants. Whereas the urban areas are already provided with these facilities to a very high extent, effort is still needed in rural areas to meet the requirements of the Austrian legislation. The way, this task should be solved has provoked much controversy. It is mainly the question, whether centralised or decentralised sewage disposal systems are preferable from the ecological and economical point of view, that became a political issue during the last 5 years. The Institute for Water Quality and Waste Management was asked to elaborate a waste water management concept for the Lainsitz River Basin, a mainly rural area in the north of Austria discharging to the Elbe river. Both ecological and economical aspects should be considered. This paper presents the methodology that was applied and the criteria which were decisive for the selection of the final solution.

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