Studies on sex in the hermaphrodite mollusk Crepidula plana. IV. Internal and external factors influencing growth and sex development

Gould, Harley N.

doi:10.1002/jez.1401190107

Cited by 36 publications

(13 citation statements)

References 22 publications

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“…Protandry in snails of the genus Crepidula, specifically Crepidula fornicata, was studied earlier this century by Coe (1936Coe ( , 1938Coe ( , 1953, Chipperfield (1951), Gould (1952), and Orton (1909), and more recently by Hoagland (1975Hoagland ( , 1978Hoagland ( , 1979, who worked extensively on comparative life histories within the genus. Despite its status as a textbook example (Kozloff 1990;Ruppert and Barnes 1994), sex change in C. fornicata is poorly understood and has not been studied within the theoretical framework provided by sex allocation theory.…”

Section: Factors Influencing Sex Change In Crepidulamentioning

confidence: 99%

Sex, Size, and Position: A Test of Models Predicting Size at Sex Change in the Protandrous Gastropod Crepidula fornicata

Collin¹

1995

The American Naturalist

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Section: Factors Influencing Sex Change In Crepidulamentioning

confidence: 99%

Sex, Size, and Position: A Test of Models Predicting Size at Sex Change in the Protandrous Gastropod Crepidula fornicata

Collin¹

1995

The American Naturalist

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“…Calyptraeids, protandrous, filter-feeding limpets, are the most well-studied sex-changing mollusks (see e.g. Gould 1917, 1919, 1952, Coe 1936, 1938, 1953, Hoagland 1978, Collin 1995, Warner et al 1996, Chen & Soong 2000. The conclusions of these studies are often contradictory, and interpretation of many older studies is difficult because they may have employed experimental conditions that starved the limpets (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of conspecific associations on size at sex change in three species of calyptraeid gastropods

Collin¹,

McLellan²,

Gruber³

et al. 2005

Mar. Ecol. Prog. Ser.

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In marine molluscs, sex change is often labile and is thought to be largely influenced by interactions with conspecifics. Previous studies of calyptraeid gastropods concluded that their social environment influences the timing of protandrous sex change. We conducted field surveys and laboratory experiments to examine the effects of conspecifics on size at sex change in 3 Panamanian calyptraeids. Crepidula cf. onyx, C. incurva Broderip, 1834 and Bostrycapulus calyptraeformis (Deshayes, 1830) vary in densities, sex ratio and mode of development, which suggests that they might respond to associations with conspecifics in different ways. However, our laboratory experiments showed that the response to interactions with conspecifics is generally similar. In all 3 species, individuals raised in isolation pass through a male phase and males raised alone change sex at the same size as males raised with another male. Both C. cf. onyx and C. incurva change sex at a larger size when kept with a female than when kept alone or with another male. The differences in size at sex change between the treatments is small and the treatment effect explains more of the variation in size at sex change in C. cf. onyx, the more solitary species, than in C. incurva, a species that is usually found in pairs. In all species, individuals with high initial growth rates change sex sooner and at a smaller size than those with slower initial growth rates. Growth rates increase significantly during sex change in C. cf. onyx and C. incurva but not in B. calyptraeformis. KEY WORDS: Protandry · Crepidula spp. · Size advantage · Bostrycapulus calyptreaformisResale or republication not permitted without written consent of the publisher

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“…Orton 1912, Gould 1952, Coe 1953, Hoagland 1978. Some species form stacks, where small males rest on larger females.…”

Section: Introductionmentioning

confidence: 99%

Population structure and sex-change in the coral-inhabiting snailCoralliophila violacea at Hsiao-Liuchiu, Taiwan

Soong

Chen

1991

Mar. Biol.

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Abstract. Surveys of the coral-inhabiting snail Coralliophila violacea (Lamarck) (= C. neritoidea Kiener) were made on shallow fringing reefs (< 8 m deep) around Hsiao-Liuchiu, Taiwan, between July and October 1990. The snails were aggregated into patches on the surface of massive poritid coral colonies. Coral colonies > 40 cm in diameter were more likely to bear patches of snails than smaller colonies, and also to have more snails. The coralliophilids ranged from 5 to 30 mm in aperture length. The sex ratio of the population was biased toward males (539:279), with only a few small individuals of indistinguishable sex. Snails between 6 and 10 mm were all males, while most snails with aperture lengths _>20 mm were females. Judging from the distinct size ranges of males and females within patches and from the observed degeneration of the penis, the snails may have changed sex from male to female with increasing size. Sex-change may occur across a wide size range (10 to 20 mm). The correlation of smallest female size and largest male size among patches indicates that snail size at sex-change is peculiar to each individual patch. Those females in patches with a single female (but many males) were significantly smaller than females in multiple-female patches. It is likely that in the absence of females males change sex at a smaller size, whereas in the presence of large females males delay sexchange until they have reached a larger size. The plasticity of size at sex-change may be adaptive and a result of natural selection at the individual level.

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Studies on sex in the hermaphrodite mollusk Crepidula plana. IV. Internal and external factors influencing growth and sex development

Cited by 36 publications

References 22 publications

Sex, Size, and Position: A Test of Models Predicting Size at Sex Change in the Protandrous Gastropod Crepidula fornicata

Sex, Size, and Position: A Test of Models Predicting Size at Sex Change in the Protandrous Gastropod Crepidula fornicata

Effects of conspecific associations on size at sex change in three species of calyptraeid gastropods

Population structure and sex-change in the coral-inhabiting snailCoralliophila violacea at Hsiao-Liuchiu, Taiwan

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