STUDIES ON THE FISHERY AND GROWTH RATE OF OCEANIC SKIPJACK KATSUWONUS PELAMIS (LINNAEUS) AT MINICOY ISLAND FROM 1966 TO 1969


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Authors

  • K K Appukkuttan Central Marine Fisheries Research Institute, Cochin.
  • P N Radhakrishnan Nair Central Marine Fisheries Research Institute, Cochin.
  • K K Kunhikoya Central Marine Fisheries Research Institute, Cochin.

Abstract

Although the skipjack fishery ,a,t Minicoy extends aU through the ye,ar the
peak fis.hery is during November-A,pri'}' T!he size in the commercial catches ronges
h~tween 350 and 695 mm: T'he total catches fluctuate 'appreciab1y firom year to
year. The catch composition and the catch 'mte in different months are presented.
EmplO'ying the ,probability-plot me,thod (H~rdjng 1949, and Oassie 1954) 4 yea,r
clas!le$ have be'en rec.ognised, ,and it is found ,that the fish alltaans 402.2, 494.0,
5,62.6 and 620.5 mm respectiveIy when i,t is 1-ye:ar, 2"year, .3-yea'r ang 4-year
old. By le,ngth-f!requency study .5 year cll\lSses were traced, having the size of
410, 500, 570, 630 a'nd 680 mm IreSipective,ly for the 1-, 2-, 3-, 4- \lIl1d 5-year
classes. Von Bel1talanffy's growth equation was fitted to the obse'rved values and
,the growth pa,ramelers were estlimMed both graphricaUy and arltihmetically which
gave identica,1 results. The calculaoted value!s of the pa'ramete~ were L CO = 843"
mm, to' .=;0 11:95 ye,arsand K = 0.22314. 1:00 length 'at age, 8'nnwail inCITement
'and ifIhe ave,rage monthly growth rMe obtalined in :these different methods we.e
almost idel!ltical.

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Author Biographies

  • K K Appukkuttan, Central Marine Fisheries Research Institute, Cochin.
    Central Marine Fisheries Research Institute, Cochin.
  • P N Radhakrishnan Nair, Central Marine Fisheries Research Institute, Cochin.
    Central Marine Fisheries Research Institute, Cochin.
  • K K Kunhikoya, Central Marine Fisheries Research Institute, Cochin.
    Central Marine Fisheries Research Institute, Cochin.

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Issue

Vol. 24 No. 1 & 2 (1977)

Section

Articles

License

The copyright of the articles published in Indian Journal of Fisheries vests with the Indian Council of Agricultural Research, who has the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in these journals. The Council has no objection in using the material, provided the information is being utilized for academic purpose but not for commercial use. Due credit line should be given to the ICAR where information will be utilized.

How to Cite

Appukkuttan, K. K., Nair, P. N. R., & Kunhikoya, K. K. (2011). STUDIES ON THE FISHERY AND GROWTH RATE OF OCEANIC SKIPJACK KATSUWONUS PELAMIS (LINNAEUS) AT MINICOY ISLAND FROM 1966 TO 1969. Indian Journal of Fisheries, 24(1 & 2), 33-47. https://epubs.icar.org.in/index.php/IJF/article/view/12124