Reproductive Biology

2020 ◽  
Keyword(s):  
Reproductive Biology ◽  
Reproductive Strategies ◽  
Mating Systems ◽  
Comprehensive Treatment ◽  
Sexual Systems ◽  
Personality Research ◽  
Gamete Formation ◽  
History Of ◽  
Reproductive Characters ◽  
Allocation Strategies

This is the sixth volume of a ten-volume series on The Natural History of the Crustacea. The volume synthesizes in nineteen chapters our current understanding of diverse topics in crustacean reproductive biology. The first part of the volume address allocation strategies to reproduction, gamete production, brooding behavior and other components of parental care in crustaceans. The second part of the volume centers on sexual systems in crustaceans. The third section of the volume covers crustacean mating systems and sexual selection. The volume ends with three chapters covering diverse topics including reproductive rhythms, and crustacean personality research, and record breaking crustaceans with respect to reproductive characters. Collectively, these nineteen chapters provide an integrative and comprehensive treatment of crustacean reproductive biology from gamete formation to mating and reproductive strategies and their evolutionary and ecological consequences.

A Brief History of Chinese-Centered Personality Research

2010 ◽  
Author(s):  
Leslie Naer A ◽  
Xiaofei Li ◽  
Qingwen Bie
Keyword(s):  
Personality Research ◽  
History Of

Religious Architecture in Latium and Etruria, c. 900-500 BC

2015 ◽  
Author(s):  
Charlotte R. Potts
Keyword(s):  
Iron Age ◽  
Central Italy ◽  
Archaic Period ◽  
Comprehensive Treatment ◽  
Archaeological Evidence ◽  
Detailed History ◽  
Religious Buildings ◽  
Religious Architecture ◽  
The People ◽  
History Of

Religious Architecture in Latium and Etruria, c. 900-500 BC presents the first comprehensive treatment of cult buildings in western central Italy from the Iron Age to the Archaic Period. By analysing the archaeological evidence for the form of early religious buildings and their role in ancient communities, it reconstructs a detailed history of early Latial and Etruscan religious architecture that brings together the buildings and the people who used them. The first part of the study examines the processes by which religious buildings changed from huts and shrines to monumental temples, and explores apparent differences between these processes in Latium and Etruria. The second part analyses the broader architectural, religious, and topographical contexts of the first Etrusco-Italic temples alongside possible rationales for their introduction. The result is a new and extensive account of when, where, and why monumental cult buildings became features of early central Italic society.

The Psychiatric Interview and Mental Status Examination

2017 ◽  
Author(s):  
Donald W. Black
Keyword(s):  
Differential Diagnosis ◽  
Social History ◽  
Mental Status ◽  
Treatment Plan ◽  
Essential Elements ◽  
Comprehensive Treatment ◽  
Psychiatric Interview ◽  
Psychomotor Activity ◽  
History Of ◽  
Mental Status Examination

The interview and mental status examination are integral to the comprehensive patient assessment and typically follow a standard approach that most medical students and residents learn. The psychiatrist should adjust his or her interview style and information-gathering approach to suit the patient and the situation. For example, inpatients are typically more symptomatic than outpatients, may be in the hospital on an involuntary basis, and may be too ill to participate in even the briefest interview. Note taking is an essential task but should not interfere with patient rapport. The interview should be organized in a systematic fashion that, although covering all essential elements, is relatively stereotyped so that it allows the psychiatrist to commit the format to memory that, once learned, can be varied. The psychiatrist should start by documenting the patient’s identifying characteristics (age, gender, marital status) and then proceed to the chief complaint, history of the present illness, past medical history, family and social history, use of drugs and alcohol, medications, and previous treatments. A formal mental status includes assessment of the patient’s appearance, attitude, and behavior; orientation and sensorium; mood and affect; psychomotor activity; thought process, speech, and thought content; memory and cognition (including attention and abstraction); and judgment and insight. With the data collected, the psychiatrist will construct an accurate history of the symptoms that will serve as the basis for developing a differential diagnosis, followed by the development of a comprehensive treatment plan. This review contains 1 figure, 3 tables, and 12 references. Key words: assessment, differential diagnosis, interviewing, mental status examination, treatment plan

scholarly journals Uterine fluid composition of the dwarf ornate wobbegong shark (Orectolobus ornatus) during gestation

2011 ◽  
Vol 62 (6) ◽  
pp. 576 ◽  
Author(s):  
Megan T. Ellis ◽  
Nicholas M. Otway
Keyword(s):  
Reproductive Biology ◽  
Coastal Waters ◽  
Reproductive Strategies ◽  
Yolk Sac ◽  
Gestation Period ◽  
Fluid Composition ◽  
Complex Composition ◽  
Eastern Australia ◽  
Uterine Fluid ◽  
Low Levels

Low fecundity in chondrichthyans makes them extremely susceptible to fishing, so understanding the various reproductive strategies in this group is vital for management. Knowledge of the uterine fluid (UF) composition throughout gestation is fundamental to this understanding, yet is restricted to a few species. This study focussed on the UF composition of the wobbegong (Orectolobus ornatus), which inhabits coastal waters off eastern Australia. The UF was quantified throughout pregnancy. Fluids surrounding uterine eggs had a complex composition, with mean urea (98.48 mmol L–1), sodium (560.25 mmol L–1) and potassium (13.93 mmol L–1) concentrations significantly greater than those in seawater. A change in composition, from complex to simple, occurred after 3–4 months gestation. Major electrolyte concentrations then resembled seawater for the remainder of gestation, suggesting the flushing of the uteri with seawater and evidenced by fluctuating low levels of urea. The gestation period reflected the time for metabolism of yolk stores, osmotic and ionic adjustment, development of functioning immunological systems and prevention of external yolk sac damage. Our study is the first documentation of UF composition for a wobbegong shark and increases understanding of its reproductive biology.

The reproductive biology of Plutonaster Bifrons, Dytaster Insigns and Psilaster Andromeda (Asteroidea: Astropectinidae) from the Rockall Trough

1982 ◽  
Vol 62 (4) ◽  
pp. 869-887
Author(s):  
P. A. Tyler ◽  
S. L. Pain
Keyword(s):  
Reproductive Biology ◽  
Reproductive Strategies ◽  
Egg Size ◽  
Food Source ◽  
Maximum Size ◽  
Reproductive Synchrony ◽  
Sea Bed ◽  
Rockall Trough ◽  
Sperm Development ◽  
Surface Production

Examination of the reproductive biology of three closely related sympatric astropectinid asteroidshas revealed two distinct reproductive strategies. In Plutonaster bifrons and Dytaster insignis the gonads are serially arranged and open at gonopores located at the tip of genital papillae found on the dorsal arm surface between the bases of the paxillae. The ovaries of these species produce numerous small (ca. 120/«n diameter) eggs which in Plutonaster bifrons appear to show a distinct synchrony of production. Initiation of gametogenesis occurs in June to August of each year with oocyte growthcontinuing until March with a spawn-out in the period March to early June. In specimens where spawningdoesnot occur, there would appear to be internal oocyte degeneration, or after spawning relict oocytesundergo phagocytosis. In males initiation of spermatogenesis may occur in August/September of eachyear but after this synchrony of sperm development is not evident. In Psilaster andromeda gonads are located at the base of the arms and each gonad opens at a single gonopore. A number of small (<300 /«n) oocytes are produced by each gonad. Some of these are phagocytosed and some undergo vitellogenesis and grow to a maximum size of 950 fim before being spawned. Unspent oocytes undergo internal degeneration. In neither females nor males is there any evidence of reproductive synchrony. From these egg sizes, fecundities and gametogenic strategies, we infer indirect planktotrophic development for Plutonaster bifrons, the transfer of a seasonal surface production to deep water providing a food source for developing larvae. The egg size and or close to the sea-bed, as there is no evidence of brooding in this species.

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