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Community structure of metazoan parasites of Trichiurus lepturus (Perciformes, Trichiuridae) from Ubatuba, Southwestern Atlantic Ocean, Brazil/Estrutura da comunidade de parasitos metazoarios de Trichiurus lepturus (Perciformes, Trichiuridae) de Ubatuba, Oceano Atlantico Sudoeste, Brasil.

Introduction

The cutlassfish or largehead hairtail Trichiurus lepturus Linnaeus, 1758 is a marine fish widely distributed throughout the world (FAO, 2005; FROESE; PAULY, 2013). It is among the ten top species that contribute most to the world total marine capture fisheries production (FAO, 2005). Among the fisheries resources of the southeastern and southern Brazil, this species has assumed a growing importance, although there is no directed fishery for its exploitation (CERGOLE et al., 2005; HAIMOVICI, 1997; NAKATANI et al., 1980). Despite of this fact, the high exploitation of T. lepturus has raised concerns in some countries (CERGOLE et al., 2005) and in the Northwest Pacific Ocean was estimated to be overexploited (FAO, 2012). Additionally, the lack of interest of some Brazilian markets on this species makes individuals, especially juveniles, to be largely discarded in various fisheries (CERGOLE et al., 2005).

Fishing and other human impacts can influence the marine community structure reducing the abundance of parasites (WOOD et al., 2013). Considering that parasites play an important role in the evolution of hosts by influencing host traits (POULIN; MORAND, 2004), revealing these changes is important to try to understand the nature of the processes that can be ruled by parasitism.

Studies on the parasites of T. lepturus have been conducted since the 70's in the Brazilian coastal zone (BARROS; AMATO, 1993; BORGES et al., 2012; BOXSHALL; MONTU, 1997; CARVALHO; LUQUE, 2009, 2011, 2012; CAVALCANTI et al., 2012; FREITAS; GOMES, 1971; FREITAS; SANTOS, 1971; LUQUE et al., 1998; ROHDE et al., 1995; SAO CLEMENTE et al., 1995; SILVA et al., 2000; VICENTE; SANTOS, 1974; WALLET; KOHN, 1987;). Some of these researches involved taxonomic aspects and others had a zoonotic or ecological approach.

In Ubatuba, Sao Paulo State, some studies were carried out on fish parasites (CARVALHO, 1951; SANTOS et al., 2001; SANCHES, 2008). Our study aimed to evaluate the community structure of metazoan parasites of T. lepturus from the Ubatuba Bay, Sao Paulo State, Brazil.

Material and methods

Fifty fishes from Ubatuba, SP, were examined including 25 females (total length = 102.24 [+ or -] 3.9 cm; weight = 607.4 [+ or -] 79.3 g); 8 males (tl = 97.37 [+ or -] 4.3, w = 529 [+ or -] 70.1) and 17 of undetermined sex (tl = 96.82 [+ or -] 7.6; w = 530.65 [+ or -] 132.48), all collected by professional fisherman in February 2008. Fish were transported to Laboratorio de Parasitologia da Universidade de Taubate (IBB-UNITAU) for examination. Individuals were identified, according to Figueiredo and Menezes (2000), weighed, measured and sexed, according to Vazzoler (1996).

The parasites recovered were prepared for identification according to Amato et al. (1991), except the crustaceans that were fixed in 70% ethanol and mounted on temporary glass slides with lactic acid. The identification of parasites was based on Boxshall and Montu (1997), Kohn and Cohen (2007), Luque et al. (2011) and Carvalho and Luque (2012). Parasites were deposited on the Collection of Platyhelminthes (ZUEC-PLA), Acanthocephala (ZUEC-ACA), Nematoda (ZUEC-NMA) and Collection of Crustacea (ZUEC-CRU), Museu de Zoologia da Universidade Estadual de Campinas--UNICAMP.

The length and weight of female and male hosts were compared through Student t-test (t) with confidence interval of 95%. When individual of undetermined sex were included, an Analysis of Variance (ANOVA) was applied, followed by Tukey's test (Q). All values of total length and weight of hosts were log-transformed [log 10 (x + 1)] (ZAR, 1999) for this analysis. The quantitative descriptors of all parasites were calculated according to Bush et al. (1997). Differences in the parasite abundance at community level were tested by ANOVA followed by an Tukey test (Q). The frequency of dominance and relative dominance were evaluated according to Rohde et al. (1995).

Pearson's correlation was applied to evaluate the correlation between the total length and weight of hosts with the abundance and intensity of infection. The correlation between the total length and weight of hosts with the prevalence of infection was tested by the Spearman's correlation. For these tests, we considered the component populations with at least 10% of prevalence of infection (BUSH et al., 1990). For these analyses, all data were previously log-transformed [log 10 (x + 1)] (ZAR, 1999).

A Poisson generalized linear model (GLM) was used to try to understand the relationship between the variables (FARAWAY, 2006). A set of 14 Poisson GLM was developed for component populations that presented significant correlations in the previous analysis. We sought to find the best set of variables that explain the resources (host sex, length and weight) and the space sharing (co-occurrence with other parasites including those with <10% prevalence) required by these parasites. The variable hosts' sex was transformed into a categorical variable, and the undetermined sex was taken as a baseline or reference parameter. Models were ranked with the corrected Akaike's information criterion (AICc) and AICc weight, using the package AICcmodavg implemented on R 2.15.2 (R CORE TEAM, 2012; MAZEROLLE, 2013). For all analyses involving parasites we considered significatives the values with p < 0.05.

Results

Females and males showed differences on total length (t = 2.88; p = 0.015) and weight (t = 2.662; p = 0.021), with higher values for females. However, when females, males and fishes of undetermined sex were analyzed together, females were only larger than undetermined sex fish (Q = -0.056; p = 0.006) and heavier than males (Q = 0.156; p = 0.019).

Altogether 31,654 parasites were collected, belonging to nine higher taxa, including one acantocephalan; one digenean; three monogeneans; two cestodes, plus the cysts of Trypanorhyncha; larvae of Anisakidae; and two species of copepods (Table 1).

The most prevalent species of the parasite community was Lecithochirium microstomum Chandler, 1935. Larvae of Anisakidae and the metacestode Scolex pleuronectis Muller, 1758 represented, respectively, the second and third most prevalent taxon (Table 1).

On the component community evaluated, L. microstomum was the most abundant species (F= 493; p < 0.05) (Tables 1 and 2) and the dominant component population (frequency of dominance = 50; relative dominance = 0.15 [+ or -] 0.06), compared with relative dominance of larvae of Anisakidae (0.002 [+ or -] 0.001), which were the second most abundant component population.

The abundance of Anisakidae larvae ([rho]p = 0.3063581; p = 0.03623) and cysts of Trypanorhyncha ([rho]p = 0.3262512; p = 0.02215) were positively correlated with host length. The host length was also a positive predictor of infection intensity for Anisakidae larvae. The weight of hosts has positively influenced the abundance and intensity of infection of L. microstomum ([rho]p = 0.328113; p = 0.0228). The prevalence of cysts of Trypanorhyncha was also positively affected by the weight of hosts ([rho]s = 0.9549937; p = 0.0008055).

For L. microstomum, the model with the highest weight included all variables (AAICc 0.00, Table 3). The same occurred for Anisakidae, but for Trypanorhyncha cysts, the best model was the one containing a set of five among the 13 variables considered. The AICc of the best model for L. microstomum was substantially different from the model with the lowest weight ([DELTA]AICc value between the best and worst model = 1035.32). This was also observed for the best model for Anisakidae ([DELTA]AICc value between the best and worst model = 152.96) and Trypanorhyncha ([DELTA]AICc value between the best and worst model = 37.74), however with a smaller difference.

For the abundance of L. microstomum and Anisakidae larvae, only P. guanabarensis and M. uruguayensis had no significant influences (Table 4). While for cysts of Trypanorhyncha, only male hosts and abundance of Anisakidae were significant. Unlike L. microstomum, the total length and weight of hosts contributed to increasing and decreasing (p < 0.05), respectively, the abundance of Anisakidae.

Discussion

The component community of metazoan parasites of T. lepturus can vary according to its geographic distribution (CARVALHO; LUQUE, 2011; CAVALCANTI et al., 2012; HO; LIN, 2002; JAKOB; PALM, 2006; SILVA et al., 2000). Some parasite species of T. lepturus were recorded in a single geographic locality, such as digeneans, monogeneans, cestodes, nematodes and copepods in Indonesia (JAKOB; PALM, 2006), Taiwan (HO; LIN, 2002) and Brazil (CARVALHO; LUQUE, 2011; CAVALCANTI et al., 2012). Simultaneously, the abundance of these parasites can also vary. But in Brazilian waters, L. microstomum has exhibited a similar trend of infection in T. lepturus. This broadly distributed species (FERNANDES et al., 2009) was more abundant and the dominant infrapopulation of the component community of T. lepturus, as previously reported (CARVALHO; LUQUE, 2011; SILVA et al., 2000) and seems to play a key role on this host-parasite system, like larvae of Anisakidae.

The ontogenetic changes in feeding habits of T. lepturus have been documented in Brazil (HAIMOVICI et al., 2008; MARTINS et al., 2005). These shifts can be the driver of differences observed in abundance of some parasites. The population of T. lepturus examined was composed by sub-adults and adults, according to Martins et al. (2005). In our analysis, smaller and heavier females were more abundantly parasitized by L. microsthomum, while larger and lighter males exhibited an increased abundance of infection by Anisakidae (Table 4).

Juveniles and sub-adults of T. lepturus feed more intensely than the adults (MARTINS et al., 2005). This finding can partially support the positive relationship between the weight of T. lepturus and intensity of L. microstomum and the negative relationship between the weight of T. lepturus and intensity of Anisakidae larvae, if we consider that, smaller and heavier fish tend to be younger, while larger and lighter fish, adults. However, the length of T. lepturus was the most powerful and positive explanatory variable of its weight (Adjusted R-squared: 0.9029; p < 0.05, results not shown), but then, why the results have lead to the interpretation that larger fish were lighter and why each group of parasites seems to require an optimality regarding the host traits?

Larvae of Anisakidae can be transmitted to T. lepturus through ingestion of intermediate or paratenic hosts. These potential hosts can be small fish, such as Engraulis anchoita Hubbs and Marini, 1935, as registered by Timi (2003) in Argentina. This is an oceanodromous fish (FROESE; PAULY, 2013), reported in the Brazilian continental shelf accompanied by T. lepturus (CERGOLE et al., 2005) and is one of the selected food items of sub-adults and adults of T. lepturus (MARTINS et al., 2005). However, some crustaceans could play this role (MCCLELLAND, 2005). Silva et al. (2000) hypothesized that L. microstomum can be transmitted to T. lepturus through ingestion of decapod crustaceans, the food predominantly ingested by juvenile fish (MARTINS et al., 2005).

It has been established that some parasites can affect physiological systems of fishes, leading to increased metabolic rates (BINNING et al., 2013; CAREAU et al., 2010), body weight loss (BOOTH et al., 1993), and longer time spent on foraging, which increases the predation risk (GODIN; SPROUL, 1988). In the present research, larvae of Anisakidae were predominantly recovered from the body cavity, inhabiting the surface of internal organs. This type of parasite is more associated with increased exposure of vertebrates to predators (LAFFERTY; SHAW, 2013) and this relationship is particularly known for larval sealworm (MCCLELLAND, 2005).

We believe that larvae of Anisakidae are transmitted to T. lepturus by both crustaceans and small fish. The intense consumption of these food items by smaller fish has as consequence the increase in weight of fish and in abundance of Anisakidae and L. microstomum (Table 4), since some parasites can be favored by infections, because they suppress the immune system of hosts (SCHMID-HEMPEL, 2011). According to the ontogenetic growth, the increasingly abundant larvae of Anisakidae probably stimulate T. lepturus to forage, causing body weight loss and exposing them to predation by definitive hosts of anisakids, such as elasmobranchs and cetaceans. If this situation occurs, it may contribute to the coexistence of species, which are potential competitors due to their feeding habits. This is especially the case of the potential dietary overlap between T. lepturus and Pontoporia blainvillei (BITTAR; DI BENEDITTO, 2009), an endangered cetacean species (DI BENEDITTO et al., 2010).

Gender biases on parasitism have been documented in several host-parasite systems (DUNEAU et al., 2012; FERRARI et al., 2007; GREAR et al., 2012; SCHMID-HEMPEL, 2011) and this is also true for fish (REIMCHEN; NOSIL, 2001; SCHMID-HEMPEL, 2011). In the present paper, a statistical significance was revealed for the abundances of cysts of Trypanorhyncha, L. microstomum and anisakids (Table 4). In the relationship between host sex and abundance of L. microstomum, the significance observed for males and females, were respectively, negative and positive, and so, females are more prone than males to acquire more parasites. For anisakid abundance, the significance of the host sex were positive for both females and males, although, with greater estimates for males (Table 4). Despite the small sample represented by the population of males, the model selection based on AICc and AICc weight evidenced that the best model included the host sex as an explanatory variable for abundance of parasites (Table 3). These differences between females and males, in the susceptibility to acquire more or less parasites could be the result of seasonal and spatial differences in sex ratio, maturity stages and feeding intensities exhibited by T. lepturus (MARTINS; HAIMOVICI, 2000). Such differences were also verified by Silva et al. (2000), who observed that males and females were more prevalently parasitized by, respectively, Callitetrarhynchus gracilis (Rudolphi, 1819) and S. pleuronectis; and females were more abundantly parasitized by Octoplectanocotyla trichiuri Yamaguti, 1963.

In the present study we observed a positive influence from abundances of Polymorphus sp. and Octoplectanocotyla travassosi Carvalho and Luque, 2012 on the abundance of L. microstomum; and a negative influence on Anisakidae (Table 4). Polymorphus sp. and O. travassosi were diagnosed with higher abundance and intensity of infection in females (without statistical significance; results not shown). The female host sex represented one of the positive predictors for the abundance of L. microstomum and a negative descriptor for anisakids, which would probably lead to misinterpretation.

The prevalence and abundance of Trypanorhyncha cysts were positively predicted by the weight and length of hosts, respectively. However, the GLM showed that males were the best positive predictor of the abundance of Trypanorhyncha cysts (Table 4). But, considering the negative relationship between the abundance of Trypanorhyncha cysts and anisakids (Table 4), it is possible that these cysts are also influenced by the abundance of anisakid larvae. Still, the capsalid and S. pleuronectis were negative and positive descriptors, respectively, of the abundance of L. microstomum and anisakids (Table 4). Nevertheless, the capsalid was recovered from a single host of smaller classes of length (89-93 cm) and weight (404-460 g). In turn, S. pleuronectis showed a higher prevalence in hosts of smaller classes of length and weight (prevalence of 32 and 34%, respectively), but greater abundance in hosts of smaller length classes, once it was observed in hosts of intermediate weight (534-580 g). These host traits were important predictors of the abundance of L. microstomum and Anisakidae, suggesting an interface among these five taxa (Trypanorhyncha cysts, capsalid, S. pleuronectis, anisakid and L. microstomum), but with Trypanorhyncha cysts and S. pleuronectis occupying different niches compared to L. microstomum and Anisakidae.

Traits of hosts seem to have a strong influence on abundance of parasites of T. lepturus. But access the influences that parasites can exert in host is not a simple task. Especially because induced changes can be associated with host mortality, which is difficult to measure in wild. Thus, include some measure of survivorship could be useful to provide adequate interpretation to manipulation of host parasite-induced (FULLER; BLAUSTEIN, 1996). Other aspect that could be explored is the cannibalism experienced by T. lepturus (BITTAR; DI BENEDITTO, 2009; MARTINS et al., 2005) that probably influences the parasitic community and consequently the degree with those parasites manipulates its hosts. So, investigate whether some parasites may limit cannibalism would be another very interesting topic (BOLKER, et al., 2008).

Conclusion

The parasite community of T. lepturus from Sao Paulo State, Brazil, was a partly structured assemblage. The most prevalent parasites or those with a nonrandom distribution across host size, weight and sex-classes exploit resources differently, which suggest a low niche overlap. These results allow postulating the way some parasites, mainly L. microstomum and larvae of Anisakidae, infect their hosts and the consequences of these interactions for this host-parasite system.

Doi: 10.4025/actascibiolsci.v36i3.21908

Acknowledgements

We are deeply grateful to J.L.Luque for helping in the identification of cysts of Trypanorhyncha, to A. R. Carvalho for precious information on parasite composition of T. lepturus, and to both, for sending us specific literature. We also would like to acknowledge the valuable suggestions made by reviewers.

References

AMATO, J. F. R.; BOEGER, W. A.; AMATO, S. B. Protocolos para laboratorio de parasitos de pescado. Seropedica: Imprensa Universitaria UFRRJ, 1991.

BARROS, G. C.; AMATO, J. F. R. Larvas de anisakideos de peixe-espada, Trichiurus lepturus L., da costa do Estado do Rio de Janeiro, Brasil. Revista Brasileira de Biologia, v. 53, n. 2, p. 241-245, 1993.

BINNING, S. A.; ROCHE, D. G.; LAYTON, C. Ectoparasites increase swimming costs in a coral reef fish. Biology Letters, v. 9, n. 1, p. 1-4, 2013.

BITTAR, V. T.; DI BENEDITTO, A. P. M. Diet and potential feeding overlap between Trichiurus lepturus (Osteichthyes, Perciformes) and Potoporia blainvillei (Mammalia, Ceatacea) in northern Rio de Janeiro, Brazil. Zoologia, v. 26, n. 2, p. 374-378, 2009.

BOLKER, B. M.; DE CASTRO, F.; STORFER, A.; MECH, S.; HARVEY, E.; COLLINS, J. P. Disease as a selective force precluding widespread cannibalism: a case study of an iridovirus of tiger salamanders, Ambystoma tigrinum. Evolutionary Ecology Research, v. 10, p. 105-128, 2008.

BORGES, J. N.; CUNHA, L. F. G.; SANTOS, H. L. C.; MONTEIRO-NETO, C.; SANTOS, C. P. Morphological and molecular diagnosis of Anisakid nematode larvae from cutlassfish (Trichiurus lepturus) off the coast of Rio de Janeiro, Brazil. PLoS ONE, v. 7, n. 7, p. 1-14, 2012.

BOOTH, D. T.; CLAYTON, D. H.; BLOCK, B. A. Experimental demonstration of the energetic cost of parasitism in free-ranging hosts. Proceedings of the Royal Society of Londom B, v. 253, n. 1337, p. 125-129, 1993.

BOXSHALL, G.; MONTU, M. Copepods parasitic on Brazilian coastal fishes: a hand book. Nauplius, v. 5, n. 1, p. 1-225, 1997.

BUSH, A. O.; AHO, J. M.; KENNEDY, C. R. Ecological versus phylogenetic determinants of helminth parasite community richness. Evolutionary Ecology, v. 4, n. 1, p. 1-20, 1990.

BUSH, J. O.; LAFFERTY, K. D.; LOTZ, J. M.; SHOSTAK, A.W. Parasitology meets ecology on its own terms: Margolis et al. revisited. Journal of Parasitology, v. 83, n. 4, p. 575-583, 1997.

CAREAU, V.; THOMAS, D. W.; HUMPHRIES, M. M. Energetic cost of bot fly parasitism in free-ranging eastern chipmunks. Oecologia, v. 162, n. 2, p. 303-312, 2010.

CARVALHO, A. R.; LUQUE, J. L. Ocorrencia de Neobenedenia melleni (Monogenea, Capsalidae) em Trichiurus lepturus (Perciformes, Trichiuridae), naturalmente infestados, no litoral do Rio de Janeiro, Brasil. Revista Brasileira de Parasitologia Veterinaria, v. 18, n. 1, p. 74-76, 2009.

CARVALHO, A. R.; LUQUE, J. L. Seasonal variation in metazoan parasites of Trichiurus lepturus (Perciformes, Trichiuridae) of Rio de Janeiro, Brazil. Brazilian Journal of Biology, v. 71, n. 3, p. 771-782, 2011.

CARVALHO, A. R.; LUQUE, J. L. Three new species of monogeneans parasitic on Atlantic cutlassfish Trichiurus lepturus (Perciformes, Trichiuridae) from Southeastern Brazil. Acta Scientiarum. Biological Sciences, v. 34, n. 3, p. 359-365, 2012.

CARVALHO, J. P. Notas sobre alguns copepodos parasitos de peixes maritimos da costa do Estado de Sao Paulo. Boletim do Instituto Oceanografico, v. 2, n. 2, p. 135-144, 1951.

CAVALCANTI, E. T. S.; TAKEMOTO, R. M.; ALVES, L. C.; CHELLAPA, S. First report of metazoan fish parasites with zoonotic potential in Scomberomorus brasiliensis and Trichiurus lepturus from the coastal waters of Rio Grande do Norte, Brazil. Marine Biodiversity Records, v. 5, n. e40, p. 1-4, 2012.

CERGOLE, M. C.; AVILA-DA-SILVA, A. O.; ROSSI-WONGTSCHOWSKI, C. L. B. Analise das principais pescarias comerciais da regiao Sudeste-Sul do Brasil: dinamica populacional das especies em explotacao. Sao Paulo: Instituto Oceanografico/USP, 2005.

DI BENEDITTO, A. P. M.; ROCHA-CAMPOS, C. C.; DANILEWICZ, D. S.; SECCHI, E. R.; MORENO, I. B.; HASSEL, L. B.; TAVARES, M.; OTT, P. H.; SICILIANO, S.; SOUZA, S. P.; ALVES, V. C. Plano de acao nacional para conservacao do Pequeno Cetaceo Toninha, Pontoporia blainvillei. Brasilia: Instituto Chico Mendes de Conservacao da Biodiversidade, ICMBio, 2010.

DUNEAU, D.; LUIJCKX, P.; RUDER, L. F.; EBERT, D. Sex-specific effects of a parasite evolving in a female-biased host population. Biomed Central Biology, v. 10, n. 104, p. 1-10, 2012.

FAO-Food and Agriculture Organization of the United Nations. Review of the state of world marine fishery resources. Rome: FAO/Fisheries Technical Papers, 2005.

FAO-Food and Agriculture Organization of the United Nations. The state of world fisheries and aquaculture. Rome: FAO/Fisheries and Aquaculture Department, 2012.

FARAWAY, J. J. Extending the linear model with R generalized linear, mixed effects and nonparametric regression models. New York: Chapman and Hall/CRC Taylor and Francis Group, 2006.

FERNANDES, B. M. M.; ARCI, A. D. N.; COHEN, S. C. New data on some species of Monogenea and Digenea parasites of marine fish from the coast of the State of Rio de Janeiro, Brazil. Revista Brasileira de Parasitologia Veterinaria, v. 18, n. 2, p. 13-18, 2009.

FERRARI, N.; ROSA, R.; PUGLIESE, A.; HUDSON, P. J. The role of sex in parasite dynamics: Model simulations on transmission of Heligmosomoides polygyrus in populations of yellow-necked mice, Apodemus flavicollis. International Journal for Parasitology, v. 37, n. 3-4, p. 341-349, 2007.

FIGUEIREDO, J. L.; MENEZES, N. A. Manual de peixes marinhos do Brasil. VI. Teleostei. Sao Paulo: Museu de Zoologia/USP, 2000.

FREITAS, J. F. T.; GOMES, D. C. Sobre uma nova especie do genero Lecithochirium Luhe, 1901 (Trematoda, Hemiuroidea). Memorias do Instituto Oswaldo Cruz, v. 69, n. 1, p. 107-113, 1971.

FREITAS, J. F. T.; SANTOS, E. Novo trematodeo parasito de peixe marinho. Memorias do Instituto Oswaldo Cruz, v. 69, n. 1, p. 79-81, 1971.

FROESE, R.; PAULY, D. FishBase, version 04/2013. Available from: <http://www.fishbase.org>. Access on: May 15, 2013.

FULLER, C. A.; BLAUSTEIN, A. R. Effects of the parasite Eimeria arizonensis on survival of deer mice (Peromyscus maniculatus). Ecology, v. 77, n. 7, p. 2196-2202, 1996.

GODIN, J. G. J.; SPROUL, C. D. Risk taking in parasitized sticklebacks under threat of predation: effects of energetic need and food availability. Canadian Journal of Zoology, v. 66, n. 11, p. 2360-2367, 1988.

GREAR, D. A.; LUONG, L. T.; HUDSON, P. J. Sexbiased transmission of a complex life-cycle parasite: why males matter. Oikos, v. 121, n. 9, p. 1446-1453, 2012.

HAIMOVICI, M. Recursos pesqueiros demersais da regiao sul. Rio de Janeiro: Femar, 1997.

HAIMOVICI, M.; ROSSI-WONGTSCHOWSKI, C. L. B. ; BERNARDES, R. A.; FISCHER, L. G.; VOOREN, C. M.; SANTOS, R. A.; RODRIGUES, A. R.; SANTOS, S. Prospeccao pesqueira de especies demersais com rede de arrasto-de-fundo na Regiao Sudeste-Sul do Brasil. Sao Paulo: Instituto Oceanografico/USP, 2008.

HO, J. S.; LIN, C. L. New Species of Metacaligus (Caligidae, Copepoda) Parasitic on the Cutlassfish (Trichiurus lepturus) of Taiwan, with a Cladistic Analysis of the Family Caligidae. Zoological Science, v. 19, n. 12, p. 1363-1375, 2002.

JAKOB, E.; PALM, H. W. Parasites of commercially important fish species from the southern Java coast, Indonesia, including the distribution pattern of trypanorhynch cestodes. Verhandlungen der Gesellschaft fur Ichthyologie, v. 5, p. 165-191, 2006.

KOHN, A.; COHEN, S. C. South American trematodes parasites of fishes. Rio de Janeiro: Imprinta Express Ltda., 2007.

LAFFERTY, K. D.; SHAW, J. C. Comparing mechanisms of host manipulation across host and parasite taxa. The Journal of Experimental Biology, v. 216, p. 56-66, 2013.

LUQUE, J. L.; AGUIAR, J. C.; VIEIRA, F. M.; GIBSON, D. I.; SANTOS, C. P. Checklist of Nematoda associated with the fishes of Brazil. Zootaxa, v. 3082, p. 1-88, 2011.

LUQUE, J. L.; CHAVES, N. D.; CEZAR, A. D. Novos registros de copepodes caligoideos parasitos de peixes marinhos do Brasil. Nauplius, v. 6, n. 1, p. 9-16, 1998.

MARTINS, A. S.; HAIMOVICI, M. Reproduction of the cutlassfish Trichiurus lepturus in the southern Brazil subtropical convergence ecosystem. Scientia Marina, v. 64, n. 1, p. 97-105, 2000.

MARTINS, A. S.; HAIMOVICI, M.; PALACIOS, R. Diet and feeding of the cutlassfish Trichiurus lepturus in the Subtropical Convergence Ecosystem of southern Brazil. Journal of the Marine Biological Association of the United Kingdom, v. 85, n. 5, p. 1223-1229, 2005.

MAZEROLLE, M. J. Package 'AICcmodavg', model selection and multimodel inference based on (Q)AIC(c), version 1.32. Available from: <http://www.cran.r-project.org>. Access on: Aug. 10, 2013.

MCCLELLAND, G. Nematoda (roundworms). In: ROHDE, K. (Ed.). Marine Parasitology. Australia: Csiro Publishing, 2005. p. 104-115.

NAKATANI, K.; MATSUURA, Y.; SATO, G. Estudo do ciclo de vida do peixe-espada Trichiurus lepturus. Boletim do Instituto Oceanografico, v. 29, n. 2, p. 255-259, 1980. POULIN, R.; MORAND, S. Parasite biodiversity. Washington, D.C.: Smithsonian Institution, 2004.

R CORE TEAM. R: a language and environment for statistical computing. Vienna: R Foundation for Statistical Computing. Available from:<http://www.R-project.org>. Access on: Aug. 20, 2012.

REIMCHEN, T. E.; NOSIL, P. Ecological causes of sex-biased parasitism in threespine stickleback. Biological Journal of the Linnean Society, v. 73, n. 1, p. 51-63, 2001.

ROHDE, K. C.; HAYWARD.; HEAP, M. Aspects of the ecology of metazoan ectoparasites of marine fishes. International Journal for Parasitology, v. 25, n. 8, p. 945-970, 1995.

SANCHES, E. G. Controle de Neobenedenia melleni (Maccallum, 1927) (Monogenea, Capsalidae) em garoupa verdadeira, Epinephelus marginatus (Lowe, 1834), cultivada em tanques-rede. Revista Brasileira de Parasitologia Veterinaria, v. 17, n. 3, p. 145-149, 2008.

SANTOS, C. P.; MOURAO, E. D.; CARDENAS, M. Q. Pseudempleurosoma gibsoni n. sp., a New Ancyrocephalid Monogenean from Paralonchurus brasiliensis (Sciaenidae) from off the Southeastern Coast of Brazil. Memorias do Instituto Oswaldo Cruz, v. 96, n. 2, p. 215-219, 2001.

SAO CLEMENTE, S. C.; MARQUES, M. C.; FREIRE, N. M. S.; LUCENA, F. P. Analise do parasitismo de Peixe Espada Trichiurus lepturus (L.) do litoral do Rio de Janeiro. Parasitologia al Dia, v. 19, n. 3-4, p. 146-149, 1995.

SCHMID-HEMPEL, P. Evolutionary parasitology: the integrated study of infections, immunology, ecology, and genetics. Oxford: Oxford University Press, 2011.

SILVA, L. O.; LUQUE, J. L.; ALVES, D. R.; PARAGUASSU, A. R. Ecologia da comunidade de metazoarios parasitos do peixe-espada Trichiurus lepturus Linnaeus (Osteichyes, Trichiuridae), do litoral do estado do Rio de Janeiro, Brasil. Revista Brasileira de Zoociencias, v. 2, n. 2, p. 115-133, 2000.

TIMI, J. T. Parasites of Argentine anchovy in the southwest Atlantic: latitudinal patterns and their use for discrimination of populations. Journal of Fish Biology, v. 63, n. 1, p. 90-107, 2003.

VAZZOLER, A. E. A. M. Biologia da reproducao de peixes teleosteos: teoria e pratica. Maringa: Eduem, 1996.

VICENTE, J. J.; SANTOS, E. Alguns helmintos de peixes do litoral norte Fluminense--II. Memorias do Instituto Oswaldo Cruz, v. 72, n. 3-4, p. 173-180, 1974.

WALLET, M.; KOHN, A. Trematodes parasites de poissons marins du littoral de Rio de Janeiro, Bresil. Memorias do Instituto Oswaldo Cruz, v. 82, n. 1, p. 21-27, 1987.

WOOD, C. L.; MICHELI, F.; FERNANDEZ, M.; GELCICH, S.; CASTILLA, J. C.; CARVAJAL, J. Marine protected areas facilitate parasite populations among four fished host species of central Chile. Journal of Animal Ecology, v. 82, n. 6, p. 1276-1287, 2013.

ZAR, J. H. Biostatistical analysis. New Jersey: Prentice-Hall, Inc, 1999.

Received on September 16, 2013.

Accepted on April 23, 2014.

Glauco Baptista Franco Bueno (1), Julio Cesar Cenci de Aguiar (2,3) * and Sonia Maria Cursino dos Santos (1)

(1) Laboratorio de Parasitologia, Universidade de Taubate, Taubate, Sao Paulo, Brazil. (2) Centro Nacional de Pesquisa da Conservacao de Peixes Continentais, Instituto Chico Mendes para Conservacao da Biodiversidade, Rod. Pref. Euberto Nemesio Pereira de Godoy, Km 6,5, Cx. Postal 64, 13630-970, Pirassununga, Sao Paulo, Brazil. (3) Programa de Pos-graduacao em Biologia Animal, Departamento de Parasitologia, Universidade Estadual de Campinas, Cx. Postal 6109, 13083-970, Campinas, Sao Paulo, Brazil. * Author for correspondence. E-mail: julio_aguiar@msn.com
Table 1. Prevalence, intensity range, mean abundance,
mean intensity and site of infection of metazoan parasites
of Trichiurus lepturus from Ubatuba, southwestern
Atlantic Ocean, Brazil.

                       Prevalence   Intensity      Mean Abundance
Parasites                 (%)         Range         [+ or -] SD

Acanthocephala
Polymorphus sp.            56         0-15         2.2 [+ or -] 3
(cystacanth)
ZUEC-ACA 6-10
Digenea
Lectthochtnum             100        31-1111    557.4 [+ or -] 243.5
microstomum
ZUEC-PLA 40-41
Monogenea
Capsalidae gen. sp.        2           0-1       0.02 [+ or -] 0.14
ZUEC-PLA 32
Pseudempleurosoma          44          0-5        0.9 [+ or -] 1.3
guanabarensis
ZUEC-PLA 33-39
Octoplectanocotyla         10          0-2       0.12 [+ or -] 0.4
travassosi
ZUEC-PLA 29-31
Cestoda
Callitetrarhynchus         2           0-1       0.02 [+ or -] 0.14
gracilis
(plerocercoid)
ZUEC-PLA 42
Scolex pleuronectis        86         0-182       20 [+ or -] 30.4
(metacestode)
ZUEC-PLA 43-55
Trypanorhyncha             30         0-12         1.4 [+ or -] 3
(cists) ZUEC-PLA
25-28
Nematoda
Anisakidae (larvals)      100         5-112       50.7 [+ or -] 26
ZUEC-NMA 14-17
Copepoda
Bomolochus sp.             2           0-1       0.02 [+ or -] 0.14
ZUEC-CRU 698
Metacaligus                14          0-3        0.2 [+ or -] 0.6
uruguayensis
ZUEC-CRU 699-701

                          Mean Intensity            Site
Parasites                  [+ or -] SD

Acanthocephala
Polymorphus sp.            4 [+ or -] 3       liver, intestine
(cystacanth)
ZUEC-ACA 6-10
Digenea
Lectthochtnum          557.4 [+ or -] 243.5   gills, stomach,
microstomum                                      intestine
ZUEC-PLA 40-41
Monogenea
Capsalidae gen. sp.             1               body surface
ZUEC-PLA 32
Pseudempleurosoma       1.9 [+ or -] 1.25        oesophagus
guanabarensis
ZUEC-PLA 33-39
Octoplectanocotyla      1.2 [+ or -] 0.45          gills
travassosi
ZUEC-PLA 29-31
Cestoda
Callitetrarhynchus              1                 stomach
gracilis
(plerocercoid)
ZUEC-PLA 42
Scolex pleuronectis     23.8 [+ or -] 31.8       intestine
(metacestode)
ZUEC-PLA 43-55
Trypanorhyncha           4.8 [+ or -] 3.5          muscle
(cists) ZUEC-PLA
25-28
Nematoda
Anisakidae (larvals)     50.7 [+ or -] 26     stomach, liver,
ZUEC-NMA 14-17                                   intestine
Copepoda
Bomolochus sp.                  1                  gills
ZUEC-CRU 698
Metacaligus              1.4 [+ or -] 0.8       gills, eyes
uruguayensis
ZUEC-CRU 699-701

Table 2. Tukey's test (Q) applied to test differences
in abundance of metazoan parasites of Trichiurus
lepturus from Ubatuba, southwestern
Atlantic Ocean, Brazil.

Parasites                              Q       p-value

L.microsthomum-Anisakidae           2401163    0.000 *
L.microsthomum-M.uruguayensis      -6068919    0.000 *
L.microsthomum-O.travassosi        -6110508    0.000 *
L microsthomum-P.guanabarensis     -5741940    0.000 *
L.microsthomum-Polymorphus sp.     -5362220    0.000 *
L.microsthomum-S.pleuronectis      -3939032    0.000 *
L.microsthomum-Trypanorhyncha      -5710600    0.000 *
Anisakidae-M.uruguayensis          -3667757    0.000 *
Anisakidae-O.travassosi            -3709346    0.000 *
Anisakidae-P.guanabarensis         -3340777    0.000 *
Anisakidae-Polymorphus sp.         -2961057    0.000 *
Anisakidae-S.pleuronectis          -1537869    0.000 *
Anisakidae-Trypanorhyncha          -3309437    0.000 *
S.pleuronectis-M.uruguayensis       2129887    0.000 *

Parasites                              Q       p-value

S.pleuronectis-O.travassosi         2171476    0.000 *
S.pleuronectis-P.guanabarensis      1802908    0.000 *
S.pleuronectis-Polymorphus sp.      1423188    0.000 *
S.pleuronectis-Trypanorhyncha       1423188    0.000 *
Polymorphus sp.-M.uruguayensis     -1771568    0.000 *
Polymorphus sp.-O.travassosi       706699,5    0.000 *
Polymorphus sp.-P.guanabarensis    379719,9     0.106
Polymorphus sp.-Trypanorhyncha     -348379,9    0.194
P.guanabarensis-M.uruguayensis     326979,6     0.277
P.guanabarensis-O.travassosi       368568,4     0.133
P.guanabarensis-Trypanorhyncha     31339,98     1.000
Trypanorhyncha-M.uruguayensis      358319,6     0.162
Trypanorhyncha-O.travassosi        399908,4    0.0692
O.travassosi-M.uruguayensis        -41588,83    0.999

* statistically significant values at 5%.

Table 3. Comparison of 14 Poisson regression using
host traits and abundance of metazoan parasites of
Trichiurus lepturus from the Ubatuba Bay, southwestern
Atlantic Ocean, Brazil.

L. microstomum

Model (1)                 [DELTA]AICc   Weight

Tl+W+Sx+A+S+P+T+Pg+          0.00         1
O+M+C+Cg+B
Tl+W+Sx+A+S+P+T+Pg+          72.38        0
O+M+C+Cg
Tl+W+A+S+P+T+Pg+O +         278.08        0
M+C+Cg+B
Tl+W+Sx+A+S+P+T+Pg+         422.40        0
O+M+C
Tl+W+Sx+A+S+P+T+Pg+         583.23        0
O
Tl+W+Sx+A+S+P+T+Pg+         580.34        0
O+M
Tl+W+Sx+A+S+P+T+Pg          642.87        0

Tl+W+Sx+A+S+P               648.22        0

Tl+W+Sx+A+S+P+T             645.18        0

Tl+W+Sx+A+S                 670.35        0

Sx+A+S+P+T+Pg+O+M+          676.41        0
C+Cg+B
Tl+W+Sx+A                   690.60        0

Tl+W+Sx                     828.69        0

A+S+P+T+Pg+O+M+C+           1035.32       0
Cg+B

Anisakidae

Model (1)                 [DELTA]AICc   Weight

Tl+W+Sx+L+S+P+T+P            0.00        0.9
g+O +M+C+Cg+B
Tl+W+L+S+P+T+Pg+O            4.46        0.1
+M+C+Cg+B
Tl+W+Sx+L+S+P+T+P            36.38       0.0
g+O +M+C+Cg
Tl+W+Sx+L+S+P+T+P            51.98       0.0
g+O +M+C
Tl+W+Sx+L+S+P+T+P            78.60       0.0
g+O
Tl+W+Sx+L+S+P+T              79.01       0.0
Tl+W+Sx+L+S+P+T+P            82.48       0.0
g+O+M
Tl+W+Sx+L+S+P+T+P            82.58       0.0
g
Sx+L+S+P+T+Pg+O+M           114.72       0.0
+C+Cg+B
L+S+P+T+Pg+O+M+C            116.47       0.0
+Cg+B
Tl+W+Sx+L+S+P               119.42       0.0
Tl+W+Sx+L+S                 132.12       0.0
Tl+W+Sx+L                   136.12       0.0
Tl+W+Sx                     152.96       0.0

Trypanorhyncha

Model (1)                 [DELTA]AICc   Weight

Tl+W+Sx+L+A                  0.00        0.65
Tl+W+Sx+L+A+S                1.90        0.25
Tl+W+Sx+L+A+S+P              4.78        0.06
Tl+W+Sx+L+A+S+P+Pg+          7.41        0.02
Tl+W+Sx+L+A+S+P+Pg+O         8.51        0.01
Tl+W+Sx                      9.19        0.01
Tl+W+Sx+L                    11.89       0.00
Tl+W+Sx+L+A+S+P+Pg+O +       12.63       0.00
M
Tl+W+L+A+S+P+Pg+O+M+         15.60       0.00
C+Cg+B
Tl+W+Sx+L+A+S+P+Pg+O +       16.23       0.00
M+C
Tl+W+Sx+L+A+S+P+Pg+O +       17.41       0.00
M+C+Cg
Tl+W+Sx+L+A+S+P+Pg+O +       20.84       0.00
M+C+Cg+B
Sx+L+A+S+P+Pg+O+M+C +        36.15       0.00
Cg+B
L+A+S+P+Pg+O+M+C+Cg+         37.74       0.00
B

(1) The best model showed the greatest weight and lowest AICc value.
Model variables: Tl, total length; W, weight; Sx, Sex; L,
L. microstomum; A, Anisakidae; S, S.pleuronectis; P, Polymorphus
sp.; T, Trypanorhyncha; Pg, P.guanabarensis; O, O.travassosi; M,
M.uruguayensu; C, Capsalidae; Cg, Cgracilis; and B, Bomolochus sp.

Table 4. Beta parameters ([beta]) and p value (p) for
the Poisson GLM using host traits and abundance of
metazoan parasites of Trichiurus lepturus from the
Ubatuba Bay, southwestern Atlantic Ocean, Brazil.
The most parsimonious model selected by the corrected
Akaike information criterion (AICc) and AICc weight.

                        L. microstomum

Variables              [beta]        P
Total length           -0.139    < 2e-16 *
Weight                  0.009    < 2e-16 *
Sex-Female              0.076    7.93e-05 *
Sex-Male               -0.310    < 2e-16 *
L. microstomum            -          -
Anisakidae              0.005    < 2e-16 *
S. pleuronectis         0.001     0.005 *
Polymorphus sp.         0.021    < 2e-16 *
Trypanorhyncha         -0.007    0.00148 *
P. guanabarensis        0.003     0.55694
O. travassosi           0.357    < 2e-16 *
M. uruguayensis        -0.008     0.56726
Capsalidae gen. sp.    -0.803    < 2e-16 *
C. gracilis            -1.081    < 2e-16 *
Bomolochus sp.         -0.382    < 2e-16 *

                             Anisakidae

Variables                [beta]         p
Total length           0.1825581    < 2e-16 *
Weight                 -0.0104819   < 2e-16 *
Sex-Female             0.1730040    0.010502 *
Sex-Male               0.2983391    0.000198 *
L. microstomum         0.0005058    5.07e-07 *
Anisakidae                 -            -
S. pleuronectis        0.0015769    0.044906 *
Polymorphus sp.        -0.0274732   0.002360 *
Trypanorhyncha         -0.0295173   0.001843 *
P. guanabarensis       0.0069460     0.719189
O. travassosi          -0.3560145   4.92e-06 *
M. uruguayensis        0.0518914     0.198804
Capsalidae gen. sp.    -1.5404895   2.49e-06 *
C. gracilis            0.7861033    4.36e-08 *
Bomolochus sp.         0.7660862    2.38e-12 *

                           Trypanorhyncha

Variables                [beta]          P
Total length            1.556e-01      0.053
Weight                 -8.478e-04      0.854
Sex-Female              5.396e-01      0.111
Sex-Male                1.586e+00    7.8e-05 *
L. microstomum          3.869e-05      0.951
Anisakidae             -2.185e-02     0.000 *
S. pleuronectis             -            -
Polymorphus sp.             -            -
Trypanorhyncha              -            -
P. guanabarensis            -            -
O. travassosi               -            -
M. uruguayensis             -            -
Capsalidae gen. sp.         -            -
C. gracilis                 -            -
Bomolochus sp.              -            -

* statistically significant values on 5% level.
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Author:Bueno, Glauco Baptista Franco; de Aguiar, Julio Cesar Cenci; dos Santos, Sonia Maria Cursino
Publication:Acta Scientiarum. Biological Sciences (UEM)
Date:Jul 1, 2014
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