Mortality of late juvenile and adult stages of the scallop Mizuhopecten yessoensis (Jay)

Silina, Alla V.

doi:10.1016/0044-8486(95)01207-9

Cited by 20 publications

(12 citation statements)

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“…The age of each scallop during its lifetime was determined retrospectively from the growth layers revealed in the microsculpture of the external surface of the upper valve according to the method suggested by Silina (1996). Winter and summer growth layers differ in their appearance and width.…”

Section: Methodsmentioning

confidence: 99%

Topical and trophic relationships in a boring polychaete–scallop association: fatty acid biomarker approach

Silina¹,

Zhukova²

2009

Mar. Ecol. Prog. Ser.

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The association between the Japanese scallop Patinopecten yessoensis and the scallopshell-boring polychaete worm Polydora brevipalpa was investigated in the natural environment. Fatty acid analyses were performed on the scallop, polychaete, and potential food materials available in the environment, with the aim of determining the main food sources of these animals and the trophic relationships between species. The scallop and the polychaete showed a similarity in their fatty acid compositions. High concentrations of 20:5n-3 and 14:0, substantial concentrations of 16:2n-4, 16:3n-4, and 16:4n-1, and ratios of 16:1n-7 to 16:0 close to 1 indicated significant contributions of diatoms in the diets of both mollusk and polychaete. Detectable levels of 18:4n-3 suggest that dinoflagellates also contributed to the diet of the animals. The fatty acid markers showed that the scallop and polychaete feed extensively on a mixed, but probably diatom-dominated phytoplankton diet. Additionally, the elevated level of bacterially derived fatty acids and saturated (mainly 18:0) acids in polychaete lipids point to an additional dietary source, detritus and bacteria. Elevated amounts of 22:6n-3 and 18:1n-9 in the scallop digestive gland are indicative of zooplankton consumption. The similarity of the diets is a major determinant of the feeding competition between these species in the community. The decrease in the scallop internal volume concurrent with an increase in the degree of shell occupation by polychaetes suggests a reduction in water-filtering potential by the scallop. Linear regressions of the degree of polychaete occupation against scallop weight and shell height revealed negative relations in both cases. With high levels of shell occupation by polychaetes, the commensal relationship between scallop and polychaete acquires some elements of parasitism. KEY WORDS: Community · Inter-specific relationships · Trophic biology · Fatty acids · Mollusks · Polychaetes Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 394: [125][126][127][128][129][130][131][132][133][134][135][136] 2009 dominant among such organisms. For instance, in muddy bottom areas of Peter the Great Bay of the Sea of Japan, the shell surface of the benthic mobile Japanese scallop Patinopecten (= Mizuhopecten) yessoensis (Jay) is free of epibionts (Silina 2002), and generally only one species (the boring polychaete Polydora brevipalpa Zachs) occurs in association with the scallop shell (Silina 2003(Silina , 2006.The effect of boring worms on oysters, abalones, scallops, clams and mussels have mainly been studied in mariculture conditions. Some researchers have shown that boring worms affect the health and growth of mollusks (Lleonart et al. 2003), whereas others did not find such an effect (Caceres-Martinez & Tinoco-Orta 2001, Calvo et al. 2001, Handley & Bergquist 1997. We investigated the association of the Japanese scallop Patinopecten yessoensis and the polychaete worm Polydora brevipalpa that inhabit...

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Section: Methodsmentioning

confidence: 99%

Topical and trophic relationships in a boring polychaete–scallop association: fatty acid biomarker approach

Silina¹,

Zhukova²

2009

Mar. Ecol. Prog. Ser.

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“…Age of each scallop was determined by counting the number of annual shell rings (Silina, 1978; Silina, 1996). Individual linear growth rates were assessed in retrospect by measuring the heights (dorso-ventral axis) of scallop shell from its apex to every annual ring.…”

Section: Methodsmentioning

confidence: 99%

“…For the Yeso scallop Patinopecten ( = Mizuhopecten) yessoensis (Jay, 1857), there is a way to assess the sex ratio for each age group in the wild population, as the author of the present study earlier developed a method of age determination and retrospective assessment of shell height growth for each scallop specimen during its lifecycle (Silina, 1978; Silina, 1996). The method is based on the growth layers in the external surface microsculpture of the upper valve of scallop.…”

Section: Introductionmentioning

confidence: 99%

Sex change in scallop Patinopecten yessoensis: response to population composition?

Silina

2018

PeerJ

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Sex structure is very labile between populations and specific for each population because it is a result of genetic, ontogenetic and biocenotic influences on the mollusks. In this study, the age frequency distribution, age-sex structure, and sex ratio were assessed in the wild populations of the Yeso scallop Patinopecten yessoensis (Jay) observed at fifteen sites in the northwestern Sea of Japan (=East Sea). The sex ratio varied between the populations from 0.83:1 to 1.52:1 (males/females), with the mean sex ratio being 1.03 ± 0.05:1. Within a population, the proportions of males and females in term of number differed between age classes. Males were more numerous than females in the younger age classes, and females prevailed over males in the older age classes. It was found that in different scallop populations the sex change occurred at different ages. In the populations that predominantly consisted of young (two- to four-year-old) individuals, males prevailed over females in the age class 2 yr.; the equal male/female proportion was found in the age class 3 yr.; and in older age classes, females prevailed over males. Another pattern was observed in the populations that consisted mainly of middle-aged (five- to six-year-old) individuals. Here, the age-sex ratio became equal at an age of 4–6 years. In the old populations (mainly 6–12-year-olds) the equal male/female proportion was observed at an age of 8–10 years. Thus, the age of sex change was not uniform for the scallop populations. It depended on the age structure of the population and, thus, was socially controlled. The greater number of females in the older age classes suggests a protandric sex change.

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“…We were able to investigate the sex ratio of each age cohort in a population of P. yessoensis as a method for ageing and determining shell height growth of each scallop through its lifetime has been devised [8, 9]. It uses the growth layers revealed in the external surface microsculpture of the upper valve.…”

Section: Introductionmentioning

confidence: 99%

“…The visible thickening of the narrowest layers (ring) occurs annually, in August. This allows both the age of each scallop, by counting the number of annual shell rings, and its individual growth rates, in retrospect by measuring the heights of the scallop shell from its apex to each annual ring, to be determined [8, 9]. The sex of the scallops may be determined visually during breeding periods [10–12].…”

Section: Introductionmentioning

confidence: 99%

Is Sexual Size Dimorphism Inherent in the ScallopPatinopecten yessoensis?

Silina

2016

Scientifica

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Studies on sexual size dimorphism in Pectinidae are limited. This work deals with the mobile long-lived scallop Patinopecten yessoensis, a common (fished and cultured) species in the subtidal benthos of the Sea of Japan. A previously developed method of age determination in P. yessoensis allowed me to compare the parameters of same aged males and females in scallop populations. The shell growth rates and sizes of both sexes were similar; therefore, it was only possible to visually identify the sex of live specimens during the breeding period (May-June). Statistical analyses showed female-biased dimorphism in the gonad weight for age groups that are >4 years old. Gonad weight (in the prespawning period) increased with age, until a threshold age was attained, which varied between populations; and then gonad weight remained virtually unchanged. The fecundity advantage hypothesis for P. yessoensis with group mating and external fertilization is at least partly realized by physiological mechanisms, which cause older females to have larger gonads than those of same aged males in the population in order to produce a larger brood. Gregarious settlement of this bivalve contributes to the reproductive success of the population so that the energetically costly ovaries may all be fertilized.

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Mortality of late juvenile and adult stages of the scallop Mizuhopecten yessoensis (Jay)

Cited by 20 publications

References 1 publication

Topical and trophic relationships in a boring polychaete–scallop association: fatty acid biomarker approach

Topical and trophic relationships in a boring polychaete–scallop association: fatty acid biomarker approach

Sex change in scallop Patinopecten yessoensis: response to population composition?

Is Sexual Size Dimorphism Inherent in the ScallopPatinopecten yessoensis?

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