On the reproductive biology and impact of imposex in a population of Buccinanops monilifer from Mar del Plata, Argentina

The populations of Buccinanops monilifer (Gastropoda: Nassariidae) from two different sites, Mar del Plata (Buenos Aires province) and a close non-polluted locality (Mar Chiquita), are compared in their imposex indices and reproductive parameters. In Mar del Plata, a beach nourishment (sand filling)...

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Autores principales: Averbuj, A., Penchaszadeh, P.E.
Formato: JOUR
Materias:
Cannibalism
Embryonic development
Imposex
Low fecundity
beach nourishment
biological development
body size
cannibalism
comparative study
embryonic development
fecundity
gastropod
imposex
reproductive biology
sediment transport
sex ratio
spawning
Gastropoda
Nassariidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00253154_v90_n4_p729_Averbuj
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00253154_v90_n4_p729_Averbuj
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spelling todo:paper_00253154_v90_n4_p729_Averbuj2023-10-03T14:35:44Z On the reproductive biology and impact of imposex in a population of Buccinanops monilifer from Mar del Plata, Argentina Averbuj, A. Penchaszadeh, P.E. Cannibalism Embryonic development Imposex Low fecundity beach nourishment biological development body size cannibalism comparative study embryonic development fecundity gastropod imposex reproductive biology sediment transport sex ratio spawning Gastropoda Nassariidae The populations of Buccinanops monilifer (Gastropoda: Nassariidae) from two different sites, Mar del Plata (Buenos Aires province) and a close non-polluted locality (Mar Chiquita), are compared in their imposex indices and reproductive parameters. In Mar del Plata, a beach nourishment (sand filling) remobilized sediment from the harbour area during 1999; our results show high imposex percentage and an increase in relative penis size index during and after this beach filling event, in contrast with the Mar Chiquita population that showed nil values during this study. Comparisons of reproductive parameters between both populations showed significantly higher frequency of spawning females and number of egg capsules per female in Mar Chiquita, while female size and number of eggs per capsule did not differ. Females from Mar del Plata that did not succeed in spawning showed higher imposex values than spawning ones. Sex-ratio was not significantly different from 1:1 in any of the sites (although male-biased in Mar del Plata and the opposite in Mar Chiquita). We found no malformations or abnormalities during intracapsular development in the imposexed population. Alternatively, we found evidence that suggests that B. monilifer intracapsular development includes the occurrence of intracapsular embryonic cannibalism of other smaller embryos, which was not previously known in this genus, and that complements adelphophagy (feeding on nurse eggs feeding). Copyright © Marine Biological Association of the United Kingdom 2010. Fil:Averbuj, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Penchaszadeh, P.E. 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_00253154_v90_n4_p729_Averbuj
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cannibalism
Embryonic development
Imposex
Low fecundity
beach nourishment
biological development
body size
cannibalism
comparative study
embryonic development
fecundity
gastropod
imposex
reproductive biology
sediment transport
sex ratio
spawning
Gastropoda
Nassariidae
spellingShingle Cannibalism
Embryonic development
Imposex
Low fecundity
beach nourishment
biological development
body size
cannibalism
comparative study
embryonic development
fecundity
gastropod
imposex
reproductive biology
sediment transport
sex ratio
spawning
Gastropoda
Nassariidae
Averbuj, A.
Penchaszadeh, P.E.
On the reproductive biology and impact of imposex in a population of Buccinanops monilifer from Mar del Plata, Argentina
topic_facet Cannibalism
Embryonic development
Imposex
Low fecundity
beach nourishment
biological development
body size
cannibalism
comparative study
embryonic development
fecundity
gastropod
imposex
reproductive biology
sediment transport
sex ratio
spawning
Gastropoda
Nassariidae
description The populations of Buccinanops monilifer (Gastropoda: Nassariidae) from two different sites, Mar del Plata (Buenos Aires province) and a close non-polluted locality (Mar Chiquita), are compared in their imposex indices and reproductive parameters. In Mar del Plata, a beach nourishment (sand filling) remobilized sediment from the harbour area during 1999; our results show high imposex percentage and an increase in relative penis size index during and after this beach filling event, in contrast with the Mar Chiquita population that showed nil values during this study. Comparisons of reproductive parameters between both populations showed significantly higher frequency of spawning females and number of egg capsules per female in Mar Chiquita, while female size and number of eggs per capsule did not differ. Females from Mar del Plata that did not succeed in spawning showed higher imposex values than spawning ones. Sex-ratio was not significantly different from 1:1 in any of the sites (although male-biased in Mar del Plata and the opposite in Mar Chiquita). We found no malformations or abnormalities during intracapsular development in the imposexed population. Alternatively, we found evidence that suggests that B. monilifer intracapsular development includes the occurrence of intracapsular embryonic cannibalism of other smaller embryos, which was not previously known in this genus, and that complements adelphophagy (feeding on nurse eggs feeding). Copyright © Marine Biological Association of the United Kingdom 2010.
format JOUR
author Averbuj, A.
Penchaszadeh, P.E.
author_facet Averbuj, A.
Penchaszadeh, P.E.
author_sort Averbuj, A.
title On the reproductive biology and impact of imposex in a population of Buccinanops monilifer from Mar del Plata, Argentina
title_short On the reproductive biology and impact of imposex in a population of Buccinanops monilifer from Mar del Plata, Argentina
title_full On the reproductive biology and impact of imposex in a population of Buccinanops monilifer from Mar del Plata, Argentina
title_fullStr On the reproductive biology and impact of imposex in a population of Buccinanops monilifer from Mar del Plata, Argentina
title_full_unstemmed On the reproductive biology and impact of imposex in a population of Buccinanops monilifer from Mar del Plata, Argentina
title_sort on the reproductive biology and impact of imposex in a population of buccinanops monilifer from mar del plata, argentina
url http://hdl.handle.net/20.500.12110/paper_00253154_v90_n4_p729_Averbuj
work_keys_str_mv AT averbuja onthereproductivebiologyandimpactofimposexinapopulationofbuccinanopsmoniliferfrommardelplataargentina
AT penchaszadehpe onthereproductivebiologyandimpactofimposexinapopulationofbuccinanopsmoniliferfrommardelplataargentina
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