Size at the onset of sexual maturity in the anomuran crab, Aegla uruguayana (Aeglidae)
The size at maturity was studied in the crab Aegla uruguayana from the Areco River (31°14′ S, 59°28′ W), Argentina. Size at sexual maturity was determined according to three criteria: morphometric (change in the relative growth of reproductive characters), histological (first maturation of gonads) a...
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2006
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017272_v87_n4_p253_Viau http://hdl.handle.net/20.500.12110/paper_00017272_v87_n4_p253_Viau |
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paper:paper_00017272_v87_n4_p253_Viau2025-07-30T17:05:42Z Size at the onset of sexual maturity in the anomuran crab, Aegla uruguayana (Aeglidae) Aegla uruguayana Reproduction and growth Sexual maturity body size comparative study crab female behavior field method histology male behavior morphometry population size reproductive behavior sexual maturity Areco River Argentina Buenos Aires [Argentina] South America Aegla uruguayana Aeglidae Decapoda (Crustacea) The size at maturity was studied in the crab Aegla uruguayana from the Areco River (31°14′ S, 59°28′ W), Argentina. Size at sexual maturity was determined according to three criteria: morphometric (change in the relative growth of reproductive characters), histological (first maturation of gonads) and functional (capability to mate and carry eggs). Regarding females, morphometric maturity occurred at a carapace length (CL) of 11.50 mm, considering abdomen width as a reproductive character. Gonad maturity of females could be observed at a minimum size ranging from 15 to 17 mm CL. The smallest ovigerous female observed in the field was 15.60 mm CL, although a relevant population incidence of ovigerous females (86.6%) has just been observed at values higher than 17 mm CL. As for males, the relative growth of the left chela length changed at a value of 15.40 mm CL, while morphological changes in sexual tube occurred between CL of 14 and 16 mm. Testicular maturation occurred at a CL ranging from 17 to 19 mm. The smallest size of males having spermatozoids in their vasa deferentia was 18.70 mm CL. The results obtained indicated that, in both sexes, functional maturity occurred after morphometric maturity and at a size similar to that of gonad maturity. Comparing sexes, females acquired sexual maturity (morphometric, gonad and functional maturity) at sizes statistically smaller than those of males. © 2006 The Authors. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017272_v87_n4_p253_Viau http://hdl.handle.net/20.500.12110/paper_00017272_v87_n4_p253_Viau |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Aegla uruguayana Reproduction and growth Sexual maturity body size comparative study crab female behavior field method histology male behavior morphometry population size reproductive behavior sexual maturity Areco River Argentina Buenos Aires [Argentina] South America Aegla uruguayana Aeglidae Decapoda (Crustacea) |
| spellingShingle |
Aegla uruguayana Reproduction and growth Sexual maturity body size comparative study crab female behavior field method histology male behavior morphometry population size reproductive behavior sexual maturity Areco River Argentina Buenos Aires [Argentina] South America Aegla uruguayana Aeglidae Decapoda (Crustacea) Size at the onset of sexual maturity in the anomuran crab, Aegla uruguayana (Aeglidae) |
| topic_facet |
Aegla uruguayana Reproduction and growth Sexual maturity body size comparative study crab female behavior field method histology male behavior morphometry population size reproductive behavior sexual maturity Areco River Argentina Buenos Aires [Argentina] South America Aegla uruguayana Aeglidae Decapoda (Crustacea) |
| description |
The size at maturity was studied in the crab Aegla uruguayana from the Areco River (31°14′ S, 59°28′ W), Argentina. Size at sexual maturity was determined according to three criteria: morphometric (change in the relative growth of reproductive characters), histological (first maturation of gonads) and functional (capability to mate and carry eggs). Regarding females, morphometric maturity occurred at a carapace length (CL) of 11.50 mm, considering abdomen width as a reproductive character. Gonad maturity of females could be observed at a minimum size ranging from 15 to 17 mm CL. The smallest ovigerous female observed in the field was 15.60 mm CL, although a relevant population incidence of ovigerous females (86.6%) has just been observed at values higher than 17 mm CL. As for males, the relative growth of the left chela length changed at a value of 15.40 mm CL, while morphological changes in sexual tube occurred between CL of 14 and 16 mm. Testicular maturation occurred at a CL ranging from 17 to 19 mm. The smallest size of males having spermatozoids in their vasa deferentia was 18.70 mm CL. The results obtained indicated that, in both sexes, functional maturity occurred after morphometric maturity and at a size similar to that of gonad maturity. Comparing sexes, females acquired sexual maturity (morphometric, gonad and functional maturity) at sizes statistically smaller than those of males. © 2006 The Authors. |
| title |
Size at the onset of sexual maturity in the anomuran crab, Aegla uruguayana (Aeglidae) |
| title_short |
Size at the onset of sexual maturity in the anomuran crab, Aegla uruguayana (Aeglidae) |
| title_full |
Size at the onset of sexual maturity in the anomuran crab, Aegla uruguayana (Aeglidae) |
| title_fullStr |
Size at the onset of sexual maturity in the anomuran crab, Aegla uruguayana (Aeglidae) |
| title_full_unstemmed |
Size at the onset of sexual maturity in the anomuran crab, Aegla uruguayana (Aeglidae) |
| title_sort |
size at the onset of sexual maturity in the anomuran crab, aegla uruguayana (aeglidae) |
| publishDate |
2006 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017272_v87_n4_p253_Viau http://hdl.handle.net/20.500.12110/paper_00017272_v87_n4_p253_Viau |
| _version_ |
1840322062170718208 |