Observation on Marine Copepod - Appendicularian Naturally Changing Concentrations Along Southwest Coast of India

  • Jean J. JOSE Centre for Earth Science Studies, Marine Biology and Chemistry Laboratory, Chemical Sciences Division, Thiruvananthapuram-695031, Kerala
  • Aaron P. LIPTON Central Marine Fisheries Research Institute, Marine Biotechnology Laboratory, Vizhinjam- 695 521, Kerala
  • Lincy ALEX St. Gregorios College, Department of Zoology, Kottarakkara - 691531, Kerala
  • Purayath UDAYAKUMAR Centre for Earth Science Studies, Marine Biology and Chemistry Laboratory, Chemical Sciences Division, Thiruvananthapuram-695031, Kerala
  • Bhama R. RAJESH Fatima Mata National College, Marine Biology Laboratory, Department of Zoology, Kollam - 691001, Kerala
  • Mary Teresa P. MIRANDA Fatima Mata National College, Marine Biology Laboratory, Department of Zoology, Kollam - 691001, Kerala

Abstract

Patterns of copepod - appendicularian distribution were studied along the Mangalore coastal waters (125049 N; 744850 E) of the Arabian Sea to understand the food and feeding relationship existing among these groups. Sampling was conducted during pre-monsoon, monsoon and post-monsoon extending from January 2009 to December 2010. The copepod and appendicularian community was sampled with a 60 ?m net to include the smallest species and their developmental stages. Copepod biomass, especially calanoids, was substantially high throughout the study. Seasonal mean results showed that the small-sized copepods (calanoids, harpacticoida and cyclopoids) dominated in terms of biomass and production. Calanoids found in abundance included Acartia, Centropages, Calanus, Eucalanus and Labidocera. Cyclopoid and Harpacticoid copepods genera dominated included Oithona, Oncaea and Microsetella, Macrosetella. Appendicularian species diversity was represented by Oikopleura fusiformis, O. dioica and its juveniles represented as Oikopleura sp. Total chlorophyll (chlorophyll a) ranging between 10 and 20 mg m-3 indicated the eutrophic state as well as productivity prevailing during the study period. Principal component analysis (PCA) indicated the routine and opportunistic seasonal grazers and establishes a phytoplankton - appendicularia - copepod - fish food chain relationship along Mangalore coast.

Metrics

Metrics Loading ...

Author Biography

Jean J. JOSE, Centre for Earth Science Studies, Marine Biology and Chemistry Laboratory, Chemical Sciences Division, Thiruvananthapuram-695031, Kerala
Department of Zoology
Published
2012-11-06
How to Cite
JOSE, J. J., LIPTON, A. P., ALEX, L., UDAYAKUMAR, P., RAJESH, B. R., & MIRANDA, M. T. P. (2012). Observation on Marine Copepod - Appendicularian Naturally Changing Concentrations Along Southwest Coast of India. Notulae Scientia Biologicae, 4(4), 20-26. https://doi.org/10.15835/nsb448158
Section
Zoology; Fishery; Research Articles