Epidemiology of Pennella sp. (Crustacea: Copepoda), in exploited Illex coindetii stock in the NE Atlantic

Authors

  • S. Pascual Lab. de Parasitología. Facultad de Ciencias del Mar. Universidad de Vigo
  • A. F. González Instituto de Investigaciones Marinas (CISC)
  • C. Gestal Lab. de Parasitología. Facultad de Ciencias del Mar. Universidad de Vigo
  • E. Abollo Lab. de Parasitología. Facultad de Ciencias del Mar. Universidad de Vigo
  • A. Guerra Instituto de Investigaciones Marinas (CISC)

DOI:

https://doi.org/10.3989/scimar.2001.65n4307

Keywords:

Pennella sp., ommastrephid squids, epidemiology

Abstract


The spatio-temporal distribution of the mesoparasitic copepod Pennella sp. on the short-finned squid Illex coindetii was studied monthly during 1993 in the southeastern North Atlantic (Galician waters, NW Spain). A total of 600 individuals were analysed separately considering two areas (north and west) with different hydrographical characteristics. Six pennellid stages were found: a copepodite, four chalimus stages and the free-living adult male and female. Epidemiology was assessed using the parasite demographic parameters. The results revealed a marked seasonal pattern in the number of parasites in squid samples from the northern area. This seasonal pattern was not detected in squids from the western area. The observed frequency distributions of parasites on the host population were aggregative at each sampling area. Infection values were extraordinarily high when they are compared with published host-parasite records for other representatives of the genus Pennella. Advantages of the parasite aggregation pattern and possible explanations of the seasonality variations in the number of parasites observed in squid samples from the northern area are discussed.

Downloads

Download data is not yet available.

Downloads

Published

2001-12-30

How to Cite

1.
Pascual S, González AF, Gestal C, Abollo E, Guerra A. Epidemiology of Pennella sp. (Crustacea: Copepoda), in exploited Illex coindetii stock in the NE Atlantic. Sci. mar. [Internet]. 2001Dec.30 [cited 2024Feb.29];65(4):307-12. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/661

Issue

Section

Articles