IJSER (ISSN 2229-5518) - "Fish Larvae of Pakistan based on “Dr. Fridtjof Nansen” Cruises 1 and 2, 1977 Identification, distribution and abundance "

Dr. JAVED AFTAB

Centre of Excellence in Marine Biology, University of Karachi Karachi-75270 Pakistan
Pakistan

Program of Masters & PhD in Marine biology
Faculty of Engineering
•••••••••••javedaftab2000@yahoo.com
University of Karachi
Pakistan

INTRODUCTION

•••Fish Larvae of Pakistan based on “Dr. Fridtjof Nansen” Cruises 1 and 2, 1977 Identification, distribution and abundance

1. ABSTRACT The present study based on the zooplankton samples collected during “Dr. Fridtjof Nansen” Cruises 1 and 2, January – February, 1977 as a part of the Indian Ocean Fishery and Development Programme – Pelagic Fish Assessment Survey, North Arabian Sea (FAO / NORAD / PAKISTAN). Standard Bongo net (60 cm diameter) of 500 µ mesh size was used to collect these samples. The samples were preserved in formalin and brought to Institute of Marine Biology (now as Centre of Excellence in Marine Biology, University of Karachi). The oblique hauls of zooplankton samples from 50 M - 0 M were used for the study of fish larvae. A total number of 1557 fish larvae from 23 stations have been analyzed. They belonged to 28 fish families and an order Angulliformes. A sum of 12 species and 23 genera could be identified. Generally, the higher number of fish larvae was found in the area south of Karachi. Larvae belong to the families Myctophidae, Bregmacerotidae, Nomeidae, and Pomadasyidae together constituted 78.0 % of the total. Benthosema pterotum larvae (44.24 %) dominated in abundance. The other abundant larvae belonged to Bregmaceros nectabanus (22.9 %), Psenes sp. (3.4 %) and Pomadasys sp. (3.3 %). Information on distribution and relative abundance of larvae of “Principal”, “Common”, and “Rare” families is given in detail. For Benthosema pterotum, Bregmaceros nectabanus, Callionymus sp. Champsodon sp. and Diaphus splendidus, a dynamic approach of tracing the development of characters sequentially has been attempted to study the life history. Distribution maps and tables are prepared. The identified fish larvae have been described and drawn using camera Lucida. Drawings are reproduced using HP Scanjet G3110 for this publication.

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Thesis Publication Details

TITLE - Fish Larvae of Pakistan based on “Dr. Fridtjof Nansen” Cruises 1 and 2, 1977 Identification, distribution and abundance
AUTHOR - Dr. JAVED AFTAB
••••••IJSER Edition - April 2016

UNIVERSITY - University of Karachi
GUIDE NAME -
Dr. Jafar Ali-Khan

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THESIS CHAPTER SCHEME
CONTENTS No. Content Page List of Figures 4 List of Tables 6 1. ABSTRACT 7 2. INTRODUCTION 8 3. MATERIALS AND METHODS 10 4. GENERAL ABUNDANCE OF UNCLASSIFIED FISH LARVAE 13 5. RELATIVE ABUNDANCE OF LARVAL FISH FAMILIES 15 6. RELATIVE ABUNDANCE OF FISH LARVAE 18 6.1 “Principal” Fish Larvae 18 6.2 “Common” Fish Larvae 21 6.3 “Rare” Fish Larvae 23 7. DISTRIBUTION OF FISH LARVAE 25 7.1 Larvae of the “Principal” Fish Families Group 25 7.1.1 Family: Myctophidae 25 7.1.2 Family: Bregmacerotidae 27 7.1.3 Family: Nomeidae 28 7.1.4 Family: Pomadasyidae 28 7.2 Larvae of the “Common” Fish Families Group 31 7.2.1 Family: Clupeidae 31 7.2.2 Family: Gobiidae 31 7.2.3 Family: Gonostomidae 32 7.2.4 Family: Champsodontidae 32 7.2.5 Family: Apogonidae 32 7.2.6 Family: Engraulidae 33 7.2.7 Family: Carangidae 33 7.3 Larvae of the “Rare” Fish Families Group 38 8. DISCRIPTION OF FISH LARVAE 41 Apogon larva 42 Blenniidae larva 44 Arnoglossus larva 45 Pseudorhombus larvae 47 Bregmaceros macclellandi larva 49 Bregmaceros nectabanus larvae 50 Bregmaceros rarisquamosus larva 52 Callionymus larvae 54 Decapterus macarel1us larvae 56 Champsodon Larvae 58 Sardinella sindensis larvae 60 Clupeidae larvae 62 Cynoglossus larvae 63 Stolephorus zollingeri larvae 65 Gobius Types I – IX larvae 67 Vinciguerria lucetia larvae 74 Lutjanidae larva 76 Benthosema pterotum larvae 77 Diaphus splendidus larvae 80 Diaphus larvae 83 Hygophum larvae 85 Myctophidae type I larva 87 Myctophidae type II larva 88 Myctophidae type III larva 89 Psenes larvae 90 Lestidiops Jayakari larvae 92 Platycephalus larvae 94 Pomacentridae type I larva 97 Pomacentridae type II larva 99 Pomacentridae type III larva 100 Pomadasys larvae 102 Priacanthus larvae 104 Sciaenidae larvae 106 Scombridae larva 108 Sillaginidae larva 109 Soleidae 110 Sphyraena larva 111 Trachinocephalus myops larvae 113 Lepidopus caudatus larva 115 Triglidae larva 117 9. DISCUSSION 118 10. ACKNOWLEDGEMENTS 121 11. LITERATURE 122	LIST OF FIGURES No. Legend of Figures Page 1. Stations grid of F. R. V. "Dr. Fridtjof Nansen” Cruises 1 and 2 (19th January - - 9th February 1977) 10 2. Distribution and abundance (per m2) of Benthosema pterotum Diaphus sp. and Hygophum sp. 27 3. Distribution and abundance (per m2) of Bregmaceros macclellandi Bregmaceros nectabanus and Bregmaceros rarisquamosus. 29 4. Distribution and abundance (per m2) of Psenes sp. 30 5. Distribution and abundance (per m2) of Pomadasys sp. 30 6. Distribution and abundance (per m2) of Sardinella sindensis and undetermined clupeid larvae. . 34 7. Distribution and abundance (per m2) of Gobius spp. 34 8. Distribution and abundance (per m2) of Vinciguerria lucetia. . 35 9. Distribution and abundance (per m2) of Champsodon sp. 35 10. Distribution and abundance (per m2) of Apogon sp. 36 11. Distribution and abundance (per m2) of Stolephorus zollingeri. . 36 12. Distribution and abundance (per m2) of Decapterus macarellus. 37 13. Larvae of Apogon sp. A) 6.375 mm; B) 8.5 mm. 43 14. Larvae of Blenniidae 3.625 mm. 44 15. Larvae of Arnoglossus sp. 4.65 mm. 46 16. Larvae of Pseudorhombus sp. A) 4.1 mm; B) 5.6 mm. 48 17. Larva of Bregmaceros macclellandi 2.75 mm. 49 18. Larvae of Bregmaceros nectabanus A) 3.375 mm; B) 5.35 mm; C) 11.9 mm. 51 19. Larva of Bregmaceros rarisquamosus 5.025 mm. 53 20. Larvae of Callionymus sp. A) 2.125 mm; B) 3.0 mm; C) 3.95 mm. 55 21. Larvae of Decapterus macarel1us A) 3.275 mm; B) 8.675 mm. 57 22. Larvae of Champsodon sp. A) 2.6 mm; B) 3.425 mm; C) 4 mm; D) 8.6 mm. 59 23. Larvae of Sardinella sindensis A) 6.25 mm; B) 14.6 mm. 61 24. Larvae of Clupeidae A) 4 mm; B) 6.275 mm. 62 25. Larvae of Cynoglossus A) 2.125 mm; B) 2.7 mm; C) 2.975 mm. 64 26. Larvae of Stolephorus zollingeri A) 4.425 mm; B) 13.55 mm. 66 27. Larvae of Gobius sp. I: A) 2.2 mm B) 4.2 mm; Gobius sp. II: A) 3.15 mm B) 4.4 mm; Gobius sp. III: 4.425 mm; Gobius sp. IV: 6.175 mm; Gobius sp. V: 7.6 mm; Gobius sp. VI: 2.325 mm; Gobius sp. VII: 2.925 mm; Gobius sp. VIII: 2.05 mm; Gobius sp. IX: 2 mm. 68 -73 28. Larvae of Vinciguerria lucetia A) 3.375; B) 12.7 mm 75 29. Larva of Lutjanidae 5.06 mm. 76 30. Larvae of Benthosema pterotum	A) 2.475 mm; B) 2.875 mm; C) 5.725 mm; D) 7.538 mm; E) 10.8 mm. 79 31. Larvae of Diaphus splendidus A) 3.425 mm; B) 4.05 mm; C) 4.525 mm; D) 4.75 mm; E) 7.425 mm. 81-82 32. Larvae of Diaphus sp. A) 3.975 mm; B) 5.425 mm; C) 7.875 mm. 84 33. Larvae of Hygophum sp. A) 2.45 mm; B) 3.2 mm; C) 5.24 mm. 86 34. Larva of Myctophidae type I: 2.625 mm. 87 35. Larva of Myctophidae type II: 3.175 mm. 88 36. Larva of Myctophidae type III: 3.075 mm. 89 37. Larvae of Psenes sp. A) 2.025 mm; B) 5.5 mm. 91 38. Larvae of Lestidiops Jayakari A) 2.75 mm; B) 6.775 mm. 93 39. Larvae of Platycephalus sp. A) 3.375 mm; B) ventral view; C) dorsal view; D) 7.825 mm. 95-96 40. Larva of Pomacentridae type I: 5.9 mm. 98 41. Larva of Pomacentridae type II: 2.65 mm. 99 42. Larva of Pomacentridae type III: 3.7 mm. 101 43. Larvae of Pomadasys sp. A) 2.25 mm; B) 3.075 mm; C) 5.875 mm. 103 44. Larvae of Priacanthus sp. A) 2.525 mm; B) 4.625 mm. . 105 45. Larvae of Sciaenidae A) 2.3 mm; B) 2.825 mm. 107 46. Larva of Scombridae 2.375 mm. 108 47. Larva of Sillaginidae 2.775 mm. 109 48. Larva of Sphyraena sp. 8.505 mm. 112 49. Larvae of Trachinocephalus myops A) 9.3 mm; B) 14.9 mm. 114 50. Larva of Lepidopus caudatus 9.0675 mm. 116 51. Larva of Triglidae 2.725 mm. 117 LIST OF TABLES No. Legend of Tables Page 1. Position of stations date year time depth observation and number of fish larvae per haul. 14 2. Fish families and their number of larvae collected from Pakistan waters on board the F. R.V. "Dr. Fridtjof Nansen" (cruise 1 and 2) during January and February 1977. Fish families are written in alphabetical order. 16 3. “Principal” fish families and their relative abundance. Taxa are listed in alphabetical order. 20 4. "Common" fish families and their relative abundance. 22 5. "Rare" fish families and their relative abundance. 24 6. Distribution and abundance (per m2) of the fish larvae belonged to the "Rare" fish families at various stations. 39

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IJSER (ISSN 2229-5518) - "Fish Larvae of Pakistan based on “Dr. Fridtjof Nansen” Cruises 1 and 2, 1977 Identification, distribution and abundance "

Dr. JAVED AFTAB

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