Metazoan parasites as biological indicators of population structure of Halobatrachus didactylus on the Portuguese coast

Abstract

Summary A total of 366 Halobatrachus didactylus (Bloch & Schneider 1801) individuals were obtained between September and November 2000 from commercial fishing vessels at eight localities along the Portuguese coast and analysed for metazoan parasite infections. Three species of parasites were found: Hysterothylacium aduncum Rudolphi 1802; Progrillotia dasyatidis Beveridge et al. 2004, which constitutes a new host record for the Lusitanian toadfish; and Nerocila orbignyi Guérin‐Méneville 1829. Prevalence and mean abundance were determined for the total fish population in each sample. Significant differences in the number of parasitized fish among the samples analysed indicate differences in the H. didactylus populations along the Portuguese coast. The cluster analysis performed to prevalence data pointed out two major clusters: one composed of mainly estuarine samples and one that grouped samples from coastal areas; this is in agreement with the results obtained by morphological and genetic analysis performed for the same samples.

Differentiation of commercially important flatfish populations along the Portuguese coast: Evidence from morphology and parasitology

“…Murta, 2000;Saborido-Rey and Nedreaas, 2000;Oliva and Ballón, 2002;Oliva and Gonzalez, 2004;O'Reilly and Horn, 2004;Marques et al, 2005), simultaneously (e.g. George-Nascimento and Arancibia, 1994) and in conjunction with genetic markers (Cabral et al, 2003a;McClelland et al, 2005;Pinheiro et al, 2005).…”

Accumulation of some heavy metals in Hysterothylacium aduncum (Nematoda) and its host sea bream, Sparus aurata (Sparidae) from North-Eastern Mediterranean Sea (Iskenderun Bay)

“…Previous researches pointed out Hysterothylacium infection all around the world including the Mediterranean Sea (Petter and Cabaret 1995;Petter and Maillard 1988;Costa et al 2004;Anderson 2000;Henderson et al 2002;Marques et al 2005;Valero et al 2006).…”

Use of parasites as biological tags in stock identification of the black scabbardfish, <i>Aphanopus carbo</i> Lowe, 1839 (Osteichthyes: Trichiuridae) from Portuguese waters

“…However, in spite of these studies, the existence of a possible relationship between the fish populations from the three areas (Sesimbra, Madeira and azores) is not fully known. a number of studies has shown that parasites may be used as biological tags in the discrimination of fish stocks from different geographical localities (Marcogliese et al, 2003;oliva et al, 2004;Marques et al, 2005;Melendy et al, 2005;McClelland and Melendy, 2007;Mackenzie et al, 2008;Ferreira Marques et al, 2009). review articles on this subject, including the procedures and methods employed in the use of parasites as biological tags, may be found in Mackenzie and abaunza (1998;, Mosquera et al (2000), Mackenzie (2002, 2004), timi (2007), abaunza et al (2008) and lester and Mackenzie (2009.…”