Is Sexual Size Dimorphism Inherent in the Scallop Patinopecten yessoensis?

Author

Silina, Alla V.

Source

Scientifica

Issue

Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-9, 9 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2016-05-12

Country of Publication

Egypt

No. of Pages

9

Main Subjects

Diseases

Abstract EN

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.

American Psychological Association (APA)

Silina, Alla V.. 2016. Is Sexual Size Dimorphism Inherent in the Scallop Patinopecten yessoensis?. Scientifica،Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1117937

Modern Language Association (MLA)

Silina, Alla V.. Is Sexual Size Dimorphism Inherent in the Scallop Patinopecten yessoensis?. Scientifica No. 2016 (2016), pp.1-9.
https://search.emarefa.net/detail/BIM-1117937

American Medical Association (AMA)

Silina, Alla V.. Is Sexual Size Dimorphism Inherent in the Scallop Patinopecten yessoensis?. Scientifica. 2016. Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1117937

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1117937