A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda):
This study of the functional morphology of the male reproductive system in astacidean crustaceans has allowed for comparisons of representatives of the superfamilies Parastacoidea, Enoplometopoidea, Nephropoidea, and the Astacoidea with a focus on the crayfishes. Tissues from the testes and (to the...
Gespeichert in:
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| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Washington, DC
Smithsonian Inst. Scholarly Press
2007
|
| Schriftenreihe: | Smithsonian contributions to zoology
624 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Zusammenfassung: | This study of the functional morphology of the male reproductive system in astacidean crustaceans has allowed for comparisons of representatives of the superfamilies Parastacoidea, Enoplometopoidea, Nephropoidea, and the Astacoidea with a focus on the crayfishes. Tissues from the testes and (to the extent possible) vasa deferentia were prepared for light and scanning electron microscopy and specimens of the following families were used: Parastacidae -- Parastacoides tasmanicus tasmanicus, Astacopsis franklinii, Parastacus nicoleti; Enoplometopidae -- Enoplometopus occidentalis; Nephropidae -- Homarus americanus; Astacidae -- Pacifastacus leniusculus trowbridgii; Cambaridae - Cambaroides japonicus, Cambaroides similis, Cambarus (Puncticambarus) acuminatus, C. (Hiaticambarus) longulus, Procambarus (Ortmannicus) fallax, P. (O.) zonangulus, P. (Scapulicambarus) paeninsulanus, and Orconectes (Procericambarus) rusticus. The single organ testis is "H-shaped" in members of the Parastacoidea, Enoplometopoidea, and Nephropoidea and consists of a pair of longitudinal lobes, each composed of an anterior and posterior lobule joined by a transverse commissure or bridge. The derived "Y-shaped" pattern of the testis of the Astacoidea is trilobed and consists of a pair of anterior lobules and a median posterior lobule that in most adult Cambaridae are joined by a trifurcate, constricted stalk, a structure that is lacking in the Cambaroidinae and Astacidae. The sac-like acini lie in the axes of the testicular lobules and produce spermatozoa As spermatogenesis proceeds, each acinus becomes larger and, with spermiogenesis and the expulsion of spermatozoa into the collecting ducts, undergoes one or two of three fates: (1) acinus regeneration occurs and another cycle of sperm production ensues (adopted exclusively by the Astacidae and Cambaroidinae); (2) secondary acini develop in the wall of existing acini, converting the primary acinus into a passageway to the collecting tubules; or (3) the acinus degenerates and new acini arise from collecting tubules (employed only by the Cambarinae and Cambarellinae). The first and second fates have been adopted by the Parastacoidea, the Enoplometopoidea, and the Nephropoidea. In the Cambarinae and Cambarellinae, the germinal cells are recognizable only in the acinar buds from the collecting tubules and when they assume the role of spermatogonia; they are not evident along the lengths of the tubules nor are they present within an acinus after the onset of spermatogenesis |
| Beschreibung: | IV, 69 S. |
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| 245 | 1 | 0 | |a A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) |c Horton H. Hobbs Jr., Margaret C. Harvey, and Horton H. Hobbs III |
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| 490 | 1 | |a Smithsonian contributions to zoology |v 624 | |
| 520 | 3 | |a This study of the functional morphology of the male reproductive system in astacidean crustaceans has allowed for comparisons of representatives of the superfamilies Parastacoidea, Enoplometopoidea, Nephropoidea, and the Astacoidea with a focus on the crayfishes. Tissues from the testes and (to the extent possible) vasa deferentia were prepared for light and scanning electron microscopy and specimens of the following families were used: Parastacidae -- Parastacoides tasmanicus tasmanicus, Astacopsis franklinii, Parastacus nicoleti; Enoplometopidae -- Enoplometopus occidentalis; Nephropidae -- Homarus americanus; Astacidae -- Pacifastacus leniusculus trowbridgii; Cambaridae - | |
| 520 | 3 | |a Cambaroides japonicus, Cambaroides similis, Cambarus (Puncticambarus) acuminatus, C. (Hiaticambarus) longulus, Procambarus (Ortmannicus) fallax, P. (O.) zonangulus, P. (Scapulicambarus) paeninsulanus, and Orconectes (Procericambarus) rusticus. The single organ testis is "H-shaped" in members of the Parastacoidea, Enoplometopoidea, and Nephropoidea and consists of a pair of longitudinal lobes, each composed of an anterior and posterior lobule joined by a transverse commissure or bridge. The derived "Y-shaped" pattern of the testis of the Astacoidea is trilobed and consists of a pair of anterior lobules and a median posterior lobule that in most adult Cambaridae are joined by a trifurcate, constricted stalk, a structure that is lacking in the Cambaroidinae and Astacidae. The sac-like acini lie in the axes of the testicular lobules and produce spermatozoa | |
| 520 | 3 | |a As spermatogenesis proceeds, each acinus becomes larger and, with spermiogenesis and the expulsion of spermatozoa into the collecting ducts, undergoes one or two of three fates: (1) acinus regeneration occurs and another cycle of sperm production ensues (adopted exclusively by the Astacidae and Cambaroidinae); (2) secondary acini develop in the wall of existing acini, converting the primary acinus into a passageway to the collecting tubules; or (3) the acinus degenerates and new acini arise from collecting tubules (employed only by the Cambarinae and Cambarellinae). The first and second fates have been adopted by the Parastacoidea, the Enoplometopoidea, and the Nephropoidea. In the Cambarinae and Cambarellinae, the germinal cells are recognizable only in the acinar buds from the collecting tubules and when they assume the role of spermatogonia; they are not evident along the lengths of the tubules nor are they present within an acinus after the onset of spermatogenesis | |
| 650 | 4 | |a Écrevisses - Morphologie | |
| 650 | 4 | |a Écrevisses - Organes génitaux | |
| 650 | 4 | |a Crayfish |x Generative organs | |
| 650 | 4 | |a Crayfish |x Morphology | |
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Datensatz im Suchindex
| _version_ | 1804137893882494976 |
|---|---|
| adam_text | IMAGE 1
CONTENTS
PREFACE V
INTRODUCTION 1 MATERIALS AND METHODS 3 TERMINOLOGY 4
PARASTACOIDEA 6 MICROANATOMY OF THE TESTIS 8 DUCTS AND TUBULES 8
ACINI 8
MICROANATOMY OF THE SPERM DUCT 13 VAS DEFERENS: TESTICULAR SEGMENT 13
COILED SEGMENTS 13 EJACULATORY DUCT 15 TERMINUS 15
SPERMATOPHORE AND SPERMATOZOA 16 NOTES ON THE TESTIS AND VAS DEFERENS OF
ASTACOPSIS FRANKLINII 16 NOTES ON THE MALE REPRODUCTIVE SYSTEM OF OTHER
PARASTACIDAE 16 THE TESTIS AND SPERM DUCTS OF PARASTACUS NICOLETI 17
ENOPLOMETOPOIDEA 17 MICROANATOMY OF THE TESTIS 18 DUCTS AND TUBULES 18
ACINI 19
MICROANATOMY OF THE SPERM DUCT 20 TERMINUS 20
SPERMATOPHORE AND SPERMATOZOA 20
NEPHROPOIDEA 22 MICROANATOMY OF THE TESTIS 22 DUCTS AND TUBULES 22 ACINI
22
MICROANATOMY OF THE SPERM DUCT 27 VAS DEFERENS: PROXIMAL SEGMENT 27
IMAGE 2
IV * SMITHSOIAN CONTRIBUTIONS TO ZOOLOCY
GLANDULAR SEGMENT 27 SPHINCTER MUSCLE 29 EJACULATORY DUCT 29
SPERMATOPHORE AND SPERMATOZOA 30
ASTACOIDEA 30
ASTACIDAE 30 PACIFASTACUS LENIUSCULUS TROWHRIDGII 31 MICROANATOMY OF THE
TESTIS 31 DUCTS AND TUBULES 31
ACINI 34
MICROANATOMY OF THE SPERM DUCT 34 TERMINUS 35
SPERMATOPHORE AND SPERMATOZOA 37
CAMBARIDAE 37 PREVIOUS STUDIES ON THE CAMBARID TESTIS 37 MICROANATOMY OF
THE TESTIS 41 DUCTS AND TUBULES 41
ACINI 42
MICROANATOMY OF THE SPERM DUCT 42 VAS DEFERENS 42
EJACULATORY DUCT 44 TERMINUS 45
SPERMATOPHORE AND SPERMATOZOA 47 COMMENTS ON RELATED ASPECTS 47
CAMBAROIDINAE 48 MICROANATOMY OF THE TESTIS 48 DUCTS AND TUBULES 48
ACINI 48
MICROANATOMY OF THE SPERM DUCT 48 VAS DEFERENS 48
EJACULATORY DUCT 50 TERMINUS 51
SPERMATOPHORE AND SPERMATOZOA 51
SUMMARY AND DISCUSSION 52 SECONDARY SEXUAL CHARACTERISTICS 52 PATTERNS
OF THE ASTACIDEAN TESTIS 52 ACINI 52
REFERENCES 54
ACKNOWLEDGMENTS 59
APPENDIX 1: ABBREVIATIONS USED IN FIGURES OF TESTIS STUDY 61
APPENDIX 2: ADDITIONAL REFERENCES 63
INDEX 65
|
| adam_txt |
IMAGE 1
CONTENTS
PREFACE V
INTRODUCTION 1 MATERIALS AND METHODS 3 TERMINOLOGY 4
PARASTACOIDEA 6 MICROANATOMY OF THE TESTIS 8 DUCTS AND TUBULES 8
ACINI 8
MICROANATOMY OF THE SPERM DUCT 13 VAS DEFERENS: TESTICULAR SEGMENT 13
COILED SEGMENTS 13 EJACULATORY DUCT 15 TERMINUS 15
SPERMATOPHORE AND SPERMATOZOA 16 NOTES ON THE TESTIS AND VAS DEFERENS OF
ASTACOPSIS FRANKLINII 16 NOTES ON THE MALE REPRODUCTIVE SYSTEM OF OTHER
PARASTACIDAE 16 THE TESTIS AND SPERM DUCTS OF PARASTACUS NICOLETI 17
ENOPLOMETOPOIDEA 17 MICROANATOMY OF THE TESTIS 18 DUCTS AND TUBULES 18
ACINI 19
MICROANATOMY OF THE SPERM DUCT 20 TERMINUS 20
SPERMATOPHORE AND SPERMATOZOA 20
NEPHROPOIDEA 22 MICROANATOMY OF THE TESTIS 22 DUCTS AND TUBULES 22 ACINI
22
MICROANATOMY OF THE SPERM DUCT 27 VAS DEFERENS: PROXIMAL SEGMENT 27
IMAGE 2
IV * SMITHSOIAN CONTRIBUTIONS TO ZOOLOCY
GLANDULAR SEGMENT 27 SPHINCTER MUSCLE 29 EJACULATORY DUCT 29
SPERMATOPHORE AND SPERMATOZOA 30
ASTACOIDEA 30
ASTACIDAE 30 PACIFASTACUS LENIUSCULUS TROWHRIDGII 31 MICROANATOMY OF THE
TESTIS 31 DUCTS AND TUBULES 31
ACINI 34
MICROANATOMY OF THE SPERM DUCT 34 TERMINUS 35
SPERMATOPHORE AND SPERMATOZOA 37
CAMBARIDAE 37 PREVIOUS STUDIES ON THE CAMBARID TESTIS 37 MICROANATOMY OF
THE TESTIS 41 DUCTS AND TUBULES 41
ACINI 42
MICROANATOMY OF THE SPERM DUCT 42 VAS DEFERENS 42
EJACULATORY DUCT 44 TERMINUS 45
SPERMATOPHORE AND SPERMATOZOA 47 COMMENTS ON RELATED ASPECTS 47
CAMBAROIDINAE 48 MICROANATOMY OF THE TESTIS 48 DUCTS AND TUBULES 48
ACINI 48
MICROANATOMY OF THE SPERM DUCT 48 VAS DEFERENS 48
EJACULATORY DUCT 50 TERMINUS 51
SPERMATOPHORE AND SPERMATOZOA 51
SUMMARY AND DISCUSSION 52 SECONDARY SEXUAL CHARACTERISTICS 52 PATTERNS
OF THE ASTACIDEAN TESTIS 52 ACINI 52
REFERENCES 54
ACKNOWLEDGMENTS 59
APPENDIX 1: ABBREVIATIONS USED IN FIGURES OF TESTIS STUDY 61
APPENDIX 2: ADDITIONAL REFERENCES 63
INDEX 65 |
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| spelling | Hobbs, Horton Holcombe Verfasser aut A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) Horton H. Hobbs Jr., Margaret C. Harvey, and Horton H. Hobbs III Washington, DC Smithsonian Inst. Scholarly Press 2007 IV, 69 S. txt rdacontent n rdamedia nc rdacarrier Smithsonian contributions to zoology 624 This study of the functional morphology of the male reproductive system in astacidean crustaceans has allowed for comparisons of representatives of the superfamilies Parastacoidea, Enoplometopoidea, Nephropoidea, and the Astacoidea with a focus on the crayfishes. Tissues from the testes and (to the extent possible) vasa deferentia were prepared for light and scanning electron microscopy and specimens of the following families were used: Parastacidae -- Parastacoides tasmanicus tasmanicus, Astacopsis franklinii, Parastacus nicoleti; Enoplometopidae -- Enoplometopus occidentalis; Nephropidae -- Homarus americanus; Astacidae -- Pacifastacus leniusculus trowbridgii; Cambaridae - Cambaroides japonicus, Cambaroides similis, Cambarus (Puncticambarus) acuminatus, C. (Hiaticambarus) longulus, Procambarus (Ortmannicus) fallax, P. (O.) zonangulus, P. (Scapulicambarus) paeninsulanus, and Orconectes (Procericambarus) rusticus. The single organ testis is "H-shaped" in members of the Parastacoidea, Enoplometopoidea, and Nephropoidea and consists of a pair of longitudinal lobes, each composed of an anterior and posterior lobule joined by a transverse commissure or bridge. The derived "Y-shaped" pattern of the testis of the Astacoidea is trilobed and consists of a pair of anterior lobules and a median posterior lobule that in most adult Cambaridae are joined by a trifurcate, constricted stalk, a structure that is lacking in the Cambaroidinae and Astacidae. The sac-like acini lie in the axes of the testicular lobules and produce spermatozoa As spermatogenesis proceeds, each acinus becomes larger and, with spermiogenesis and the expulsion of spermatozoa into the collecting ducts, undergoes one or two of three fates: (1) acinus regeneration occurs and another cycle of sperm production ensues (adopted exclusively by the Astacidae and Cambaroidinae); (2) secondary acini develop in the wall of existing acini, converting the primary acinus into a passageway to the collecting tubules; or (3) the acinus degenerates and new acini arise from collecting tubules (employed only by the Cambarinae and Cambarellinae). The first and second fates have been adopted by the Parastacoidea, the Enoplometopoidea, and the Nephropoidea. In the Cambarinae and Cambarellinae, the germinal cells are recognizable only in the acinar buds from the collecting tubules and when they assume the role of spermatogonia; they are not evident along the lengths of the tubules nor are they present within an acinus after the onset of spermatogenesis Écrevisses - Morphologie Écrevisses - Organes génitaux Crayfish Generative organs Crayfish Morphology Smithsonian contributions to zoology 624 (DE-604)BV000003167 624 OEBV Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=016654001&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Hobbs, Horton Holcombe A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) Smithsonian contributions to zoology Écrevisses - Morphologie Écrevisses - Organes génitaux Crayfish Generative organs Crayfish Morphology |
| title | A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) |
| title_auth | A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) |
| title_exact_search | A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) |
| title_exact_search_txtP | A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) |
| title_full | A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) Horton H. Hobbs Jr., Margaret C. Harvey, and Horton H. Hobbs III |
| title_fullStr | A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) Horton H. Hobbs Jr., Margaret C. Harvey, and Horton H. Hobbs III |
| title_full_unstemmed | A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) Horton H. Hobbs Jr., Margaret C. Harvey, and Horton H. Hobbs III |
| title_short | A comparative study of functional morphology of the male reproductive systems in the Astacidea with emphasis on the freshwater crayfishes (Crustacea: Decapoda) |
| title_sort | a comparative study of functional morphology of the male reproductive systems in the astacidea with emphasis on the freshwater crayfishes crustacea decapoda |
| topic | Écrevisses - Morphologie Écrevisses - Organes génitaux Crayfish Generative organs Crayfish Morphology |
| topic_facet | Écrevisses - Morphologie Écrevisses - Organes génitaux Crayfish Generative organs Crayfish Morphology |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=016654001&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV000003167 |
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