Additional records on intersexuality in the isopod <i>Mesidotea sibirica</i> (Birula, 1896)

Korczynski, R. E.

doi:10.1139/z88-274

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…A number of mechanisms have been associated with intersexuality. Gonadal intersexuality in certain crustacean species has been attributed to hereditary factors and forms of parasitism (1,17,18). In mammals, gonadal intersexuality appears to be influenced by genetic factors (6,19).…”

mentioning

confidence: 99%

Forms and prevalence of intersexuality and effects of environmental contaminants on sexuality in cricket frogs (Acris crepitans).

Reeder

Foley

Nichols

et al. 1998

Environ Health Perspect

123

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Cricket frogs (Acris crepitans) from several different sites in Illinois were collected to assess the effects of environmental contamination on the prevalence of intersex gonads. Of 341 frogs collected in 1993, 1994, and 1995, 2.7% were intersex individuals. There was no statistically significant relationship between the chemical compounds detected and cricket frog intersexuality. However, there was an association approaching significance (p = 0.07) between the detection of atrazine and intersex individuals. A comparison of reference sites with sites that had point polychlorinated biphenyl (PCB) and polychlorinated dibenzofuran (PCDF) contamination revealed a significant relationship between sex-ratio reversal and contamination with PCBs and PCDFs. The sex ratio of juvenile frogs studied from three sites with PCB and PCDF point contamination favored males over females, which was the opposite of the sex ratio in control ponds (p = 0.0007). The statistically significant correlation between organochlorine contamination and sex-ratio reversal suggests PCBs and PCDFs can influence cricket frog sexual differentiation. The current study suggests that in cricket frogs, sex ratios and the prevalence of intersex gonads are altered by environmental contamination.ImagesFigure 1Figure 2

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mentioning

confidence: 99%

Forms and prevalence of intersexuality and effects of environmental contaminants on sexuality in cricket frogs (Acris crepitans).

Reeder

Foley

Nichols

et al. 1998

Environ Health Perspect

123

View full text Add to dashboard Cite

show abstract

“…Gonadal intersexuality in certain crustacean species has been attributed to hereditary factors and forms of parasitism (1,17,18). In mammals, gonadal intersexuality appears to be influenced by genetic factors (6,19).…”

mentioning

confidence: 99%

Forms and Prevalence of Intersexuality and Effects of Environmental Contaminants on Sexuality in Cricket Frogs (Acris crepitans)

Reeder¹,

Foley²,

Nichols³

et al. 1998

Environmental Health Perspectives

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“…Dunn et al, 1994;Ladewig et al, 2003;McCurdy et al, 2004;Ford & Fernandes, 2005), Isopoda (cf. Korczynski, 1988;Rigaud & Juchault, 1998), and Decapoda (cf. Galil & Tom, 1990;Laurent, 1991;Micheli, 1991;Zou & Fingerman, 2000;Hanamura & Ohtsuka, 2003;Turra, 2004;Tang et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Intersexuality in the burrowing crayfish, Parastacus pilimanus (Von Martens, 1869) (Decapoda, Parastacidae)

Rudolph

Verdi

2010

Crustac

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Various authors have reported the occurrence of supernumerary gonopores in many species of Parastacus, which has generated discussion about their sexual system. In this study, we examine the external and internal sexual characters of 102 specimens of the burrowing crayfish, Parastacus pilimanus, captured in the province of Maldonado in southeast Uruguay, with the aim of clarifying its sexual system. In this study, we show that in all the specimens analysed, female and male gonopores co-existed externally, and we verified the presence of only one type of gonad internally: either ovary (intersex females) or testis (intersex males), from which one pair of oviducts and another of sperm ducts originated, connecting the gonad to the respective gonopores. We also verified that all specimens smaller than 27.2 mm cephalothorax length (CL) (N = 73) had the same external morphology. Nevertheless, dissection revealed that their gonads were already differentiated. We established that 54.8% of these specimens were intersex females, while the remaining percentage corresponded to intersex males. Twenty-nine specimens were found with a CL equal to, or above, 27.2 mm. Of these, 34.5% (N = 10) were intersex males with the same external morphological traits that characterize all specimens smaller than 27.2 mm CL. The remaining 19 specimens (65.5%) were intersex females, 15 of which presented secondary sexual characters, probably associated with egg incubation. The evidence gathered suggests that Parastacus pilimanus has permanent intersexuality, similar to Parastacus pugnax and Parastacus varicosus in Uruguay. We conclude by identifying some topics that require further study, in order to understand the adaptive value of this type of intersexuality. RESUMENVarios autores han reportado la ocurrencia de gonoporos supernumerarios en muchas especies de Parastacus, lo que ha generado discusión acerca del sistema sexual de ellas. En este trabajo nosotros examinamos los caracteres sexuales externos e internos de 102 especimenes del camarón excavador Parastacus pilimanus capturados en el Departamento de Maldonado, sureste de Uruguay, 3 )

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Additional records on intersexuality in the isopod Mesidotea sibirica (Birula, 1896)

Cited by 10 publications

References 2 publications

Forms and prevalence of intersexuality and effects of environmental contaminants on sexuality in cricket frogs (Acris crepitans).

Forms and prevalence of intersexuality and effects of environmental contaminants on sexuality in cricket frogs (Acris crepitans).

Forms and Prevalence of Intersexuality and Effects of Environmental Contaminants on Sexuality in Cricket Frogs (Acris crepitans)

Intersexuality in the burrowing crayfish, Parastacus pilimanus (Von Martens, 1869) (Decapoda, Parastacidae)

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