Nutritional Condition and Parasites of the Sand Goby<i>Pomatoschistus Minutus</i>(Pallas) from the German Wadden Sea

Petersen, Frerk

doi:10.1080/00785326.1992.10429927

Cited by 6 publications

(10 citation statements)

References 7 publications

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“…Condition factor is related to nutritional status of fish (Greenstreet et al 1992, Petersen 1992, Rajasilta 1992, Weisberg & Burton 1993. Condition factor was positively correlated with GSI values in Z. temminicki in Japan (Katano 1992), but there was no significant correlation in Z. pachycephalus.…”

Section: Discussionmentioning

confidence: 92%

The reproductive biology of an endemic cyprinid,Zacco pachycephalus, in Taiwan

1995

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Section: Discussionmentioning

confidence: 92%

The reproductive biology of an endemic cyprinid,Zacco pachycephalus, in Taiwan

1995

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“…However, in summer the role of definitive host is increasingly taken over by juvenile bib (Van Damme unpubl.). Along the German coast, highest infection levels were found in AugusWSeptember (Mann 1964) or October (Petersen 1992). Because neither of these authors reported the size or possible age of the examined fish it is difficuit to m a~e a comparison.…”

Section: Discussionmentioning

confidence: 94%

“…Possibly, there is no spring overlap in the distribution of sand gobies and soles in the German Wadden Sea. More data on spatial distribution and temporal patterns in occurrence of sole in the area should be gathered before this hypothesis can be tested (Petersen 1992). …”

Section: Discussionmentioning

confidence: 99%

“…In the Belgian as well as in the southwestern Dutch coastal area, 2 transmission waves could be distinguished (Hamerlynck et al 1989): a first wave occurred in late autumn when juvenile sand gobies were infected, and a second transmission wave occurred in the following spring when mature, spawning sand gobies were infected. Mann (1964) and Petersen (1992) found that Lernaeocera lusci was responsible for a significant decrease in the condition factor of sand gobies. Moreover, both fat content of the liver and henloglobin content were lower in infected gobies as compared to non-infected individuals (Mann 1964).…”

Section: Introductionmentioning

confidence: 99%

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Infection dynamics of Lemaeocera lusci on sand goby Pomatoschistus minutus in the Oosterschelde (The Netherlands)

Damme¹,

Ollevier²

1994

Dis. Aquat. Org.

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Male and female sand gobies Pomatoschistus minutus (Pallas) from the Oosterschelde (The Netherlands) were examined for the crustacean mesoparasite Lernaeocera lusci (Bassett-Smith) from Apnl to July 1992. Prevalence increased steeply from 4 % in Apnl to 80% (females) and 57 % (males) in June. The peak abundance of recently attached infective stages (pennella larvae) on sand gobies was found in May. By June, about 70% of parasites were in the post-metamorphosis stage and possessed egg strings. Significant differences in abundance between males and females were found in June but not in May. This may be due to sex-specific differences in behaviour during spawning time. The majority of post-spawning fish probably d~e d in July. Fish of the new year class which were captured in July harboured no parasites.

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“…In studies on L. branchialis in gadiform fish, no difference in prevalence was observed between the sexes but it did vary in some locations in Atlantic cod and haddock, and consequently is useful as a biological indicator of stocks (Kabata 1958;Sherman and Wise 1961;Templeman et al 1976). Prevalence of L. lusci in female sand gobies is greater than in males because of behavioural differences after spawning (Petersen 1992; Van Damme and Ollevier 1994). While males tend to be sedentary in their nests, females often roam and are probably exposed more often to the infec-…”

Section: Discussionmentioning

confidence: 95%

Influence of Haemobaphes cyclopterina and H. intermedius (Copepoda) on Arctic cod (Boreogadus saida) and tidepool sculpins (Oligocottus maculosus), respectively

Khan¹,

Munehara²,

Ryan³

et al. 1997

Can. J. Zool.

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A study was conducted to determine the prevalence and effects of two species of blood-feeding copepods on their definitive fish hosts, viz. Haernobaphes cyclopterina parasitizing Arctic cod (Boreogadus saida) and H. intermedius infecting tidepool sculpins (Oligocottus maculosus). Infected and uninfected Arctic cod and tidepool sculpins were captured by SCUBA and dip net in the northwest Atlantic and northeast Pacific, respectively. Biological variables such as condition factor, hepatic somatic index, gonadal somatic index, and haematocrit were compared between the two groups of Arctic cod of both sexes, whereas only condition factor was compared in the two groups of sculpins of both sexes. Prevalence of H. cyclopterina (8%) was considerably lower than that of H. intermedius (46%). This difference is probably associated with the hosts' behaviour, as the Arctic cod is pelagic whereas the tidepool sculpin is restricted to the littoral zone, where infections are probably acquired. Infected Arctic cod of both sexes had significantly lower condition factor, hepatic and gonadal somatic indices, and haematocrit than non-parasitized fish. Only females harboured large numbers of the parasite and showed even more dramatic changes than the corresponding groups. The growth period of H. cyclopterina on Arctic cod from the time of infection to the fully developed egg sac stage is probably about 6 months. In tidepool sculpins, condition factor was significantly lower in infected than in uninfected fish. These results, especially for the Arctic cod, parallel those reported for gadoid fish following infection with haematophagous species of Lernaeocera that impair growth and reproduction.RCsumC : Nous avons etudie la gravite des infections et les effets de deux especes de copepodes hematophages sur leur hate terminal, viz. Haemobaphes cyclopterina, parasite du Sai'da franc (Boreogadus saida) et H. intermedius, parasite du Chabot de biche (Oligocottus maculosus). Des sai'das du nord-ouest de 1'Atlantique et des chabots du nord-est du Pacifique, certains infect&, d'autres sains, ont kt6 captures a la puise en plongee sous-marine (SCUBA). Des variables biologiques, coefficient d'embonpoint, indice hdpato-somatique, indice gonado-somatique et hkmatocrite, ont Ct6 comparkes chez les sai'das des deux sexes, infect& ou sains, alors que seulement le coefficient d'enbonpoint a Ct C compare chez les poissons des deux groupes des deux sexes dans le cas des chabots. La frkquence des infections d'H. cyclopterina (8%) Ctait beaucoup plus faible que celle d'H. intermedius (46%). Cette difference s'explique probablement par les comportements respectifs du sai'da, un poisson pklagique, et du chabot, qui est restreint a la zone littorale oh se contractent probablement les infections. Chez les sai'das infect& des deux sexes, le coefficient d'embonpoint, indice hepato-somatique, indice gonado-somatique et hematocrite Ctaient significativement plus faibles que chez les poissons sains. Seulement les sai'das femelles portaient des nombres multiples du pa...

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Nutritional Condition and Parasites of the Sand GobyPomatoschistus Minutus(Pallas) from the German Wadden Sea

Cited by 6 publications

References 7 publications

The reproductive biology of an endemic cyprinid,Zacco pachycephalus, in Taiwan

The reproductive biology of an endemic cyprinid,Zacco pachycephalus, in Taiwan

Infection dynamics of Lemaeocera lusci on sand goby Pomatoschistus minutus in the Oosterschelde (The Netherlands)

Influence of Haemobaphes cyclopterina and H. intermedius (Copepoda) on Arctic cod (Boreogadus saida) and tidepool sculpins (Oligocottus maculosus), respectively

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