Effects of eyestalk ablation at different times of the year on molting and reproduction of the estuarine grapsid crab Chasmagnathus granulata (Decapoda, Brachyura)

The effect of unilateral and bilateral eyestalk ablation on molting and reproduction of the estuarine crab Chasmagnathus granulata was studied, during the prereproductive (PRE), reproductive (R), and postreproductive (POST) periods under constant laboratory conditions. The effect of the laboratory c...

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Autores principales:	Stella, V.S., López Greco, L.S., Rodríguez, E.M.
Formato:	JOUR
Materias:	Chasmagnathus granulata
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_02780372_v20_n2_p239_Stella
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_02780372_v20_n2_p239_Stella
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spelling	todo:paper_02780372_v20_n2_p239_Stella2023-10-03T15:16:51Z Effects of eyestalk ablation at different times of the year on molting and reproduction of the estuarine grapsid crab Chasmagnathus granulata (Decapoda, Brachyura) Stella, V.S. López Greco, L.S. Rodríguez, E.M. Chasmagnathus granulata The effect of unilateral and bilateral eyestalk ablation on molting and reproduction of the estuarine crab Chasmagnathus granulata was studied, during the prereproductive (PRE), reproductive (R), and postreproductive (POST) periods under constant laboratory conditions. The effect of the laboratory conditions themselves was also evaluated by comparing the control intact crabs maintained in the laboratory with an intact outdoor group. Bilateral ablation was a stronger inducer of molting than was unilateral ablation. The former treatment induced in both sexes the highest percentages of molting (65-100%) in shorter times, as well as a higher size increment at molting, regardless of the period when it was performed. During POST period, unilateral-ablated and intact crabs from both sexes also molted, females in a higher percentage than males. No spawning was recorded in females that had undergone bilateral ablation. Unilateral-ablated and intact females first spawned and then molted during R. Unilateral ablated females also had, during R period, up to two spawnings before molting, whereas the laboratory control crabs had only one. The laboratory-control and unilateral-ablated females spawned during PRE period, while none of the outdoor control did during that period. We conclude that: (1) bilateral ablation is a very strong inducer of molting for both sexes during any season of the year, (2) unilateral ablation increases the female reproductive output during the reproductive period, and (3) the laboratory conditions used in this study are capable of inducing spawning during the prereproductive period. Fil:López Greco, L.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rodríguez, E.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02780372_v20_n2_p239_Stella
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Chasmagnathus granulata
spellingShingle	Chasmagnathus granulata Stella, V.S. López Greco, L.S. Rodríguez, E.M. Effects of eyestalk ablation at different times of the year on molting and reproduction of the estuarine grapsid crab Chasmagnathus granulata (Decapoda, Brachyura)
topic_facet	Chasmagnathus granulata
description	The effect of unilateral and bilateral eyestalk ablation on molting and reproduction of the estuarine crab Chasmagnathus granulata was studied, during the prereproductive (PRE), reproductive (R), and postreproductive (POST) periods under constant laboratory conditions. The effect of the laboratory conditions themselves was also evaluated by comparing the control intact crabs maintained in the laboratory with an intact outdoor group. Bilateral ablation was a stronger inducer of molting than was unilateral ablation. The former treatment induced in both sexes the highest percentages of molting (65-100%) in shorter times, as well as a higher size increment at molting, regardless of the period when it was performed. During POST period, unilateral-ablated and intact crabs from both sexes also molted, females in a higher percentage than males. No spawning was recorded in females that had undergone bilateral ablation. Unilateral-ablated and intact females first spawned and then molted during R. Unilateral ablated females also had, during R period, up to two spawnings before molting, whereas the laboratory control crabs had only one. The laboratory-control and unilateral-ablated females spawned during PRE period, while none of the outdoor control did during that period. We conclude that: (1) bilateral ablation is a very strong inducer of molting for both sexes during any season of the year, (2) unilateral ablation increases the female reproductive output during the reproductive period, and (3) the laboratory conditions used in this study are capable of inducing spawning during the prereproductive period.
format	JOUR
author	Stella, V.S. López Greco, L.S. Rodríguez, E.M.
author_facet	Stella, V.S. López Greco, L.S. Rodríguez, E.M.
author_sort	Stella, V.S.
title	Effects of eyestalk ablation at different times of the year on molting and reproduction of the estuarine grapsid crab Chasmagnathus granulata (Decapoda, Brachyura)
title_short	Effects of eyestalk ablation at different times of the year on molting and reproduction of the estuarine grapsid crab Chasmagnathus granulata (Decapoda, Brachyura)
title_full	Effects of eyestalk ablation at different times of the year on molting and reproduction of the estuarine grapsid crab Chasmagnathus granulata (Decapoda, Brachyura)
title_fullStr	Effects of eyestalk ablation at different times of the year on molting and reproduction of the estuarine grapsid crab Chasmagnathus granulata (Decapoda, Brachyura)
title_full_unstemmed	Effects of eyestalk ablation at different times of the year on molting and reproduction of the estuarine grapsid crab Chasmagnathus granulata (Decapoda, Brachyura)
title_sort	effects of eyestalk ablation at different times of the year on molting and reproduction of the estuarine grapsid crab chasmagnathus granulata (decapoda, brachyura)
url	http://hdl.handle.net/20.500.12110/paper_02780372_v20_n2_p239_Stella
work_keys_str_mv	AT stellavs effectsofeyestalkablationatdifferenttimesoftheyearonmoltingandreproductionoftheestuarinegrapsidcrabchasmagnathusgranulatadecapodabrachyura AT lopezgrecols effectsofeyestalkablationatdifferenttimesoftheyearonmoltingandreproductionoftheestuarinegrapsidcrabchasmagnathusgranulatadecapodabrachyura AT rodriguezem effectsofeyestalkablationatdifferenttimesoftheyearonmoltingandreproductionoftheestuarinegrapsidcrabchasmagnathusgranulatadecapodabrachyura
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Effects of eyestalk ablation at different times of the year on molting and reproduction of the estuarine grapsid crab Chasmagnathus granulata (Decapoda, Brachyura)

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