Intersex in the gonochoristic crustacean Tanais dulongii (Audouin, 1826) (Peracarida: Tanaidacea: Tanaididae): a comparison of external reproductive characteristics

被引：7

作者：

Enrique Rumbold, Carlos ^{[1
,2
,3
]}

Mabel Obenat, Sandra ^{[1
,2
,3
]}

Soledad Leonardi, Maria ^{[4
]}

Daniel Spivak, Eduardo ^{[1
,2
,3
]}

机构：

[1] Univ Nacl Mar del Plata, Dept Biol, Mar Del Plata, Buenos Aires, Argentina

[2] Univ Nacl Mar del Plata, IIMyC, Mar Del Plata, Buenos Aires, Argentina

[3] Consejo Nacl Invest Cient & Tecn CONICET, Mar Del Plata, Buenos Aires, Argentina

[4] Ctr Nacl Patagon CENPAT CONICET, Puerto Madryn, Argentina

来源：

JOURNAL OF NATURAL HISTORY | 2015年 / 49卷 / 13-14期

关键词：

ovisacs; Tanaidacea; intersex; Tanais dulongii; genital cones; SEX DETERMINATION; AMPHIPOD; BEHAVIOR; HISTORY;

D O I：

10.1080/00222933.2014.981309

中图分类号：

X176 [生物多样性保护];

学科分类号：

090705 ;

摘要：

Tanais dulongii (Audouin, 1826) is a small benthic crustacean with separate sexes and a marked sexual dimorphism characterized by a cephalothorax narrowed anteriorly, larger chelae (claws) and a pair of tiny genital cones in males, and ovisacs that form chambers for carrying embryos in females. Recent studies have described the existence of intersexual individuals with a cephalothorax similar to males, large chelae and ovisacs, but, due to their small size, it has not been possible to confirm the presence of genital cones under normal light microscopy. The present study analyses and compares external reproductive structures under scanning electron microscopy, of male and female T.dulongii, to corroborate the presence of both ovisacs and genital cones in potentially intersex individuals. The possible causes, such as hermaphroditism, environmental sex determination, parasitism, genetic aberration or endocrine-disrupting pollutants, are discussed.

引用

页码：775 / 788

页数：14

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