Shrimps and Prawns of various kinds have certainly been a source of protein for human consumptions from very early times. Within historical times reference is made to prawn in ancient Chinese and Japanese literature. Usage of the term „Prawn‟ and „Shrimp‟ are somewhat confusing. In some western literature the term „Shrimp‟ is applied for Penaeoidea and Sergestoidea, but in the east these are called „Prawn‟. Holthuis discussed the contradiction but did not arrive at any conclusion. In the Prawn Symposium of the Indo-Pacific Fisheries Council held at Tokyo in 1955 it was decided that the word „Prawn‟ should be applied to the Penaeids, Pandalids and Palemonids while „Shrimp‟ to the smaller species belonging to the other families. As such in the present study the term „Prawn‟ is used for all the species belonging to family Penaeidae. Among a variety of edible decapod crustaceans, prawns contribute largely to the fishery wealth of many nations. Exploitation of prawn resource from the seas around each country is playing increasingly significant role in furthering their national economy. In recent years, in spite of some ecological hazards, the demand for prawns and prawn products has increased so much that every country is making efforts to utilize hitherto unknown but usable stocks and expansion of prawn fisheries and industries near coast line is rightly being given the maximum encouragement in the development programme of each nation. After the work of Burkenroad and Kubo, the genus Penaeus has been revised in several times by Tirmizi, Burukovsky and Perez Farfanty & Kensley and classified into six established genera. The chronological history of the development of six genera has been given bellow.
Table of Contents
Introduction
Chapter 1
Materials & methods
Morphology and terminology
A. Rostrum
B. Carapace
C. Abdomen
D. Telson
E. Appendages
a. Cephalic
b. Thoracic
c. Abdominal
F. Exoskeletal ring of an abdominal somite
G. Eye
H. Secondary sexual structure
a. Petasma
b. Thelycum
c. Appendix masculine
Chapter 2
Systematic Account
A. Superfamily Penaeoidea Rafinesque-Schmaltz, 1815
1. Family Penaeidae Rafinesque – Schmaltz, 1815
Chapter 3
Genus Metapenaeopsis Bouvier, 1905
1. Metapenaeopsis andamanensis (Wood-Mason, 1891)
2. Metapenaeopsis barbata (De Haan, 1844)
3. Metapenaeopsis commensalis (Borradaile, 1898)
4. Metapenaeopsis coniger (Wood-Mason, 1891)
5. Metapenaeopsis gallensis (Pearson, 1905)
6. Metapenaeopsis hilarula (De Man, 1911)
7. Metapenaeopsis mogiensis (Rathbun, 1902)
8. Metapenaeopsis novaeguineae (Haswell, 1879)
9. Metapenaeopsis palmensis (Haswell, 1879)
10. Metapenaeopsis philippii (Bate, 1881)
11. Metapenaeopsis stridulans Alcock, 1905
12. Metapenaeopsis toloensis Hall, 1962
Chapter 4
genus Metapenaeus Wood-Mason, 1891
1. Metapenaeus affinis (H. Milne Edwards, 1837)
2. Metapenaeus alcocki George and Rao, 1966
3. Metapenaeus brevicornis (Milne Edwards, 1837)
4. Metapenaeus dobsoni (Miers, 1878).
5. Metapenaeus eboracensis Dall, 1957
6. Metapenaeus elegans De Man, 1907
7. Metapenaeus ensis (De Haan, 1850)
8. Metapenaeus intermedius (Kishinouye, 1900)
9. Metapenaeus krishnatrii Silas and Muthu, 1974
10. Metapenaeus kutchensis George, George and Rao, 1963
11. Metapenaeus lysanasa (De Man, 1888)
12. Metapenaeus monoceros (Fabricius, 1798)
13. Metapenaeus moyebi (Kishinouye, 1896)
14. Metapenaeus stebbingi Nobili, 1904
Research Objectives and Themes
The primary objective of this work is to provide a comprehensive taxonomic study and systematic account of the genera Metapenaeopsis and Metapenaeus found within the Indian coastal region. By examining existing museum collections and literature, the research aims to clarify the taxonomic status of various species, offer clear identification keys, and document their morphological features and geographical distribution.
- Taxonomic revision and systematic documentation of the family Penaeidae in Indian waters.
- Detailed morphological analysis, including diagrams of whole specimens, petasma, and thelycum.
- Development of diagnostic keys for the identification of species under the genera Metapenaeopsis and Metapenaeus.
- Geographical distribution mapping and ecological context for commercially significant prawn species.
Excerpt from the Book
Metapenaeus alcocki George and Rao, 1966
The species was described by George and Rao (1966) from Gulf of Kutch, North-West coast of India. A brief history of the species with special reference to Indian contributions has been given below.
1966 Metapenaeus alcocki George and Rao, J. mar. biol. Ass. India, 8(1) : 146-152; Deshmuk, 1975 Indian J. Fish., George, 1980, J. Bombay nat. Hist. Soc., 76:297-304, Rao, 1983, Indian J. Fish., 30(1) : 124-134.
Type Species: Metapenaeus alcocki George and Rao, 1966, J. mar. biol. Ass. India, 8(1): 146-151.
Type Locality: Gulf of Kutch, North – West Coast of India (22028/ N, 70003/ E).
Material Examined: 1 male (76 mm) and 2 females (78-90 mm), ZSI. Reg. No. C4909/2, Subhas Port, Gujarat, 10.12.1992, H.C. Ghosh and party; 1 male (97 mm), CMFRI. No. 90, Gulf of Kutch (Allotype), 16.4.1963, M.J. George.
Summary of Chapters
Introduction: Provides an overview of the importance of prawns as a protein source, clarifies the terminology between "prawn" and "shrimp," and discusses the history of the classification of Penaeidae.
Chapter 1: Details the materials and methods used in the study, including specimen preservation, dissection techniques, and the morphological terminology applied to the taxonomic study.
Chapter 2: Presents the systematic account of the family Penaeidae, including the diagnostic characters of the superfamily Penaeoidea and a key to its families.
Chapter 3: Focuses on the genus Metapenaeopsis, providing a taxonomic account, diagnostic characters, and an identification key for the species recorded in India.
Chapter 4: Provides a comprehensive taxonomic account and identification key for the species belonging to the genus Metapenaeus in the Indian region.
Keywords
Penaeidae, Metapenaeopsis, Metapenaeus, Decapoda, Taxonomy, Indian Coast, Morphology, Petasma, Thelycum, Crustacea, Prawn Fisheries, Systematic Account, Identification Key, Marine Biology, Biodiversity
Frequently Asked Questions
What is the core focus of this research?
The work primarily focuses on the taxonomic revision and systematic account of the genera Metapenaeopsis and Metapenaeus within the Indian coastal region to support the identification of commercially important species.
Which key groups are discussed in the work?
The study centers on the family Penaeidae, specifically detailing 12 species of the genus Metapenaeopsis and 14 species of the genus Metapenaeus.
What is the ultimate goal of the identification keys?
The goal is to provide researchers and fishery biologists with practical, dichotomous keys that enable accurate identification of species based on morphological features such as the rostrum, petasma, and thelycum.
What methodology was employed for this analysis?
The research is based on examining specimens preserved in national collections, supplemented by literature review, anatomical dissections under stereoscopic binocular microscopes, and illustrative work using line drawings and camera lucida.
What information is provided in the species accounts?
Each species account typically includes a description of its taxonomy, diagnostic morphological characters, geographical distribution, and details of material examined during the study.
Which descriptive terms characterize the study?
Key terms include morphological differentiation, taxonomic revision, systematic position, geographical range, and diagnostic features of the exoskeleton, such as carination, sulci, and reproductive structures.
How are the species under the genus Metapenaeus distinguished from other prawns?
They are distinguished by specific gill structures, the absence of eggs on abdominal pleopods, and distinct morphological features of their thoracic and abdominal appendages as outlined in Chapter 2.
What is the significance of the petasma and thelycum in this study?
These are primary secondary sexual structures used for taxonomic differentiation in both the genus Metapenaeopsis and Metapenaeus, providing distinct features for accurate species identification.
- Citar trabajo
- Angsuman Chanda (Autor), 2017, Prawn of Genus Metapenaeopsis and Metapenaeus from Indian Water, Múnich, GRIN Verlag, https://www.grin.com/document/378030
