Systematics, Fishery, Resource Characteristics and Bionomics of ...

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157 In females of A.a/cocki 131-140 mm, 141-150m and 151-160 mm were the length classes dominated during September to November. In females, 121-130mm appeared as the modal size class followed by 101- 110mm and 131-140mm (Fig.6. 33). Males found to be very smaller than females in the exploited stock. In males of A.a/cocki, 81-90 mm formed as !he modal class during July, August while 101-11 Omm length groups frequently represented in the catches during rest of the months (Fig. 6.34). The fishery of P.spinipes was constituted by specimens ranging in length from 51-150 mm in females and 51-160 mm in males, however, specimens below 71 mm and above 121 mm were barely represented in the commercial landings. Length frequency distribution of P.spinipes during 2000-01 and 2001-02 are shown in Fig.6.31 & 6.32. In general. !he monthly size frequency distribution during 2000-01 was appeared to be uni modal in character with the modes ranging between 81-90 mm and 111-120mm. However. the principal mode was found at 90-100 mm in females and 101-110mm in males. From May onwards. a shift in the modal class was discernible in females from 81-90 mm to 91-100mm. During 2001-02. the modal class of both male and female remained more or less the same. The fishery of M. andamanensis was constituted by individuals in !he range 32 to 148 mm in females and 39 to 141 mm in males in the
commercial landings (Fig. 6.29 & 6.30). The modal class of females in the fishery during 2000-01 was 91-100 mm whereas in males it was 81- 9Omm. Juveniles of 51-60mm were appeared from January onwards and the peak was observed during March and April indicating the spawning 158 and entry of new recruits to the fishery. From May onwards, a predominance of 61-70mm size groups was registered in the fishery thus showing a slow shift in the monthly modal progression. During 2001-02 the modal class was found at 90-100 followed by 70-80 in both the sexes. 6.3.5.Percentage of berried prawns to the female population The monthly percentage of berried females in the total female population exploited is given in Table 6. 21. In H. woodmasoni, the peak occurrence of berried females was observed during December to February during when on an average 88.7% of females were found to carry eggs attached on the pleopodal setae. The second major peak was observed in October during when 81.4% of the total female population were found ovigerous. From March onwards, there was a steady decline of egg carry females to half and the lowest value was realized during July with only 22.75% berries in the total female population.
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SYSTEMATICS, FISHERY, RESOURCE CHAR
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CERTIFICATE This is to certify that
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Section 1. Chapter 1. General Intro
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Chapter 1 GENERAL INTRODUCTION
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finfish and shellfish resources. Du
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R.V.KALAVA and R.V.vARUNA during 19
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The deep sea prawns are an assembla
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water decapod crustaceans from the
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Heterocarpus gibbous and H.woodmaso
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Relini {1988}, Demestre and Martin
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characteristics and stock size. Mos
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of males and females of Heterocarpu
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Chapter 7 explains the seasonal, se
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Fig 1.1 Harbours of Kerala Selected
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Chapter 2 SYSTEMATICS
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the body parts such as rostra I len
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The linear measurement and function
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variations that exist among the spe
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2.3 RESULTS Fifteen species of deep
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Genus Oplophorus H.Milne-Edwards 15
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...................................
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2.3.1.4. Key to the commercially im
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and 4th pereopods are as long as pe
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Distribution & economic importance:
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Colour: Yellowish orange through ou
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Colour: Abdomen bright pink in colo
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Distinctive characters: Rostrum in
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in total length, middle portion of
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present at its distal end. Eyes lar
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thin, 5 th pair longest surpassing
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Plesionika cottei Kotte , 1903. Ple
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Distribution and economic importanc
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length and stouter, carpus of which
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support by hanging antennal scale.
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Antennal scale very large. more tha
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orders outer margin of scaphocerite
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Under the super family Pandaloidea
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e linear while in males the relatio
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carapace length , rostral length ,1
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characteristics will be having much
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P.jerryi positively allometric rela
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carapace length, rostra I length an
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11.13 Minimum ,maxlmum,mean and eta
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Table 2.3.10 V.I .... of Intercept
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o.v •• tlona fron'I "'-0'."'0"
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P •• 'cockJ P . .,-nllH>_ P ...
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B. lWMeo,." }enyll'8rez Farfanla ,1
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A. H.hlrocarpus woodmasonl A1cock,
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A. P/es/onlka mart/If (Milne-Edward
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A. Ac.nthephyrll.rm.1IJ Milne-Edwar
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deep sea fIShery to enhance product
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where: pi is equivalent with ni b)
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3.3.2. Hydrographic parameters The
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species richness showed a sharp inc
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the second year, the diversity indi
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on the continental regions in diffe
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ID Murawski (2000) the great H' val
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Section 3 EXPLORATORY SURVEYS AND Q
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4.1. INTRODUCTION The demand for sh
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The revelation of commercially expl
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4.3. RESULTS 4.3.1. Latitude wise a
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dominant at 301-350 m (62.40%) (Tab
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was dominant at 301-350 m whereas H
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was computed was 42.46kg/hr while t
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109 Yti1en compared to the lesser d
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the observations made in the explor
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5.1. INTRODUCTION 112 The deep sea
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asis of materials collected from R.
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117 on a daily basis from each harb
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operation shifted to off Kanyakumar
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5.3.5 Month wise landings 121 Month
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a substantial portion of the exploi
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October and February in 2000-01 and
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egistered in October while the same
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CPU of 6.89 kg and 31.24 kg respect
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I1ese depths (Fig. 5.49 & 5.50). Th
Page 252 and 253: 5.4. DISCUSSION 134 The innovative
Page 254 and 255: Ihe first year and occupied second
Page 256 and 257: can be postulated as one of the rea
Page 281: Plate 5.1 A Harvest of deep- sea pr
Page 284 and 285: Plate 5.4 A fully equipped deep-sea
Page 288 and 289: esource characteristics of deep sea
Page 291 and 292: 146 Where 'w' is the observed weigh
Page 293: Male log w = -3.9348+2.3259 log I (
Page 298 and 299: younger size groups (Fig. 6.24). In
Page 301: to 61-70 mm where as in the higher
Page 305 and 306: surveys off south west coast of Ind
Page 307 and 308: uncompressed carapace and a long ro
Page 309 and 310: 164 with the highest preponderance
Page 311 and 312: The exploited stock of deep sea pra
Page 315: , .... .-- _ .. "", .. __ • ., __
Page 320: 7.6.15 Sex ratio of Mefllpenaeopsis
Page 340 and 341: Section 4 BIONOMICS OF DEEP SEA PRA
Page 342 and 343: 7.1. INTRODUCTION The study of food
Page 345 and 346: etter picture of food item when eac
Page 347 and 348: 7 .3. RESULTS 173 Analysis of stoma
Page 349 and 350: 7. Polychaetes consisting of mostly
Page 351 and 352: 177 Monthly variation in the diet p
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7.3.2.Stomach conditions 179 Percen
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181 Gastro somatic indices recorded
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JWCductive epi pelagic zone to near
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185 In H. woodmasoni, juveniles dev
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Table 7.1 Index of preponderance of
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(1951). Aoto (1952). Kurata (1955).
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Sakthikulangara, Cochin, Munambum a
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iOfoonal for 12 to 24 hrs. Afterwar
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1- abdominal segment and can be vis
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7. Spent recovering females 198 Ova
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201 year which would indicate the p
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204 Among males of H woodmasoni, an
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estimated as 20672 eggs. Fecundity
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210 !he peak spawning season of H.r
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213 Ri therefore it can be inferred
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216 Of the twenty five fecundity in
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PIli. 8.3 : Oocytes showing yolk dr
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Plate 8.6 A: viteltogenic oocytes i
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Plate 8. 8 A: Venlral view of grey
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Plate 8.10 : Dorsal view of female
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9.1. INTRODUCTION 217 Deep water pr
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219 of total carontenoids with the
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222 King and Moffitt (1984). The to
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224 Analysis was done repeatedly fo
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227 showed a sharp increase from im
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232 lipid content of mesopelagic an
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234 the other hand, the level incre
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236 exoskeleton, muscle, gonad and
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238 tissues with highest content in
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240 spawning activity as evidenced
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242 performance of natural caroteno
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Chapter 10 AGE AND GROWTH
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244 such phenomena in mathematical
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246 Modal progressions in time seri
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249 the landings observed at three
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251 Where K is the growth constant
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253 estimated as 5 years at which t
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255 phi prime values (+') of Hgibbo
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258 protandric hermaphrodites. Howe
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260 the ideal value of three as rep
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10.3 Growth parameters of males and
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11.1. INTRODUCTION 262 Owing to luc
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265 coefficient (Z), among the vari
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Fishing mortality estimation 268 In
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F U = - (1-e- z ) Z Exploitation ra
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272 Sekharan's method. The average
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274 distinct modes to the usable st
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277 reference to Indian Ocean regio
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279 Pauly's empirical formula. It m
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281 H.gibbosus are prone to the thr
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Though a wealth of information is a
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284 genera from the exploited stock
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351-450m. 451- 550m and 551-65Om de
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abundance, the highest clhr recorde
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290 The life history traits such as
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H.gibbous and H woodmasoni showed t
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294 significant (P< 0.05). In males
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RECOMMENDATIONS 297 The recommendat
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REFERENCES
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Alien, Y. O. and M. R. Landry (1984
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Arrobas, I and A.R.Cascalho (1987)
Page 553 and 554:
Bertalanffy,L.V. (1934)Untersuchung
Page 555 and 556:
Butler , T.H. (1970) Synopsis of bi
Page 557 and 558:
Chace, F.A. (1940) The bathypelagic
Page 559 and 560:
Company. J. B. and F. Sarda (1997)
Page 561 and 562:
O'onghia ,G., P.Maiorano,P.Maiorano
Page 563 and 564:
Dieuzeide,R( 1960) Le fond chalutab
Page 565 and 566:
Finney. W. C. and L.G. Abele (1981)
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Garcia,S.(1977) Biologie et dynamic
Page 569 and 570:
321 Sea in relation to their conten
Page 571 and 572:
Hastings, W.H. (1976) Fish nutritio
Page 573 and 574:
Hopkins, C.C.E., J.R. Sargent and E
Page 575 and 576:
Jennings ,S. and M. Kaiser (1988) T
Page 577 and 578:
King,M.G. and A.J.Butler (1985) Rel
Page 579 and 580:
331 carcinologiques. Bull . Cent. E
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Linder,H.J. (1959) Studies on the f
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Maurin, C.L. (1961) Repartition des
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Mistakidis, M.N. (1957) The biology
Page 587 and 588:
Nalini, C. (1976) Observation on th
Page 589 and 590:
Orsi Relini, Land G. Relini (1985)
Page 591 and 592:
Peterson, C.G.J. (1892) Fiskenbiolo
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Rao ,P.V. and C. Suseelan (1967) On
Page 595 and 596:
Rikhtor,V.A. and V.N. Effanov (1976
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349 tauvina (Forskkal , 1775) and E
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Squires. H.J. (1968) Relation of te
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354 the southeastern United States.
Page 604 and 605:
Wang .R. S.Chen and Z.zhong (1989)
Page 606 and 607:
Yano. J. and S. Kobayashi (1969) Ca
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