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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Autores principales: Viau, V.E., López Greco, L.S., Bond-Buckup, G., Rodríguez, E.M.
Formato: JOUR
Materias:
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
Aeglidae
Decapoda (Crustacea)
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00017272_v87_n4_p253_Viau
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00017272_v87_n4_p253_Viau
record_format dspace
spelling todo:paper_00017272_v87_n4_p253_Viau2023-10-03T13:51:47Z Size at the onset of sexual maturity in the anomuran crab, Aegla uruguayana (Aeglidae) Viau, V.E. López Greco, L.S. Bond-Buckup, G. Rodríguez, E.M. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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)
Viau, V.E.
López Greco, L.S.
Bond-Buckup, G.
Rodríguez, E.M.
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.
format JOUR
author Viau, V.E.
López Greco, L.S.
Bond-Buckup, G.
Rodríguez, E.M.
author_facet Viau, V.E.
López Greco, L.S.
Bond-Buckup, G.
Rodríguez, E.M.
author_sort Viau, V.E.
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)
url http://hdl.handle.net/20.500.12110/paper_00017272_v87_n4_p253_Viau
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