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• W1963557995 abstract "[Isopods associated with prop roots of Rhizophora mangle were collected in a coastal lagoon system of western Mexico. The system, Estero de Urias, has no permanent freshwater supply and is under strong influence of tides. Four species were recognized. Paracerceis sculpta and Cassidinidea mexicana were rare but Paradella dianae and Uromunna sp. were occasionally abundant and widely distributed within the system. There was a clear tendency for P. dianae to occupy roots in the outer (closer to the inlet) portion of the system, while the opposite occurred with Uromunna sp. Both species were tolerant to some variations in salinity (31-38 ppt in P. dianae ; 31 to 42 ppt in Uromunna ) and temperature (24-33°C in P. dianae ; 21-32°C in Uromunna ), but a drastic drop in salinity during the rainy months had a negative effect on absolute abundance of both species. Forty-two combinations of major sessile epibionts were recorded on prop roots. Uromunna sp. was found associated with 18 of these combinations and P. dianae with 12, although the presence of these two species in some communities was marginal. A one-way ANOVA indicated that macroalgae, alone or combined with other epibionts, were statistically more important for Uromunna sp., while barnacles (alone or combined) were more important for P. dianae . The sex ratio in Uromunna sp. was relatively stable during the entire survey (32-49% were males), except in June. A large proportion of gravid females (9-38%) was observed from October to July and the species appears to reproduce year round. Males of P. dianae were always dominated by females and/or juveniles in number, and usually represented less that 30% of the specimens. Juveniles were present almost all year round. The largest size for Uromunna sp. was observed in March and July; the smallest size in November, December, and April. For P. dianae , the largest size was observed in April and October, the smallest in March, August, and December. Les isopodes associes aux racines aeriennes de Rhizophora mangle ont ete recoltes dans un systeme de lagunes cotieres situe le long de la cote Ouest du Mexique. Ce systeme, l'estero de Urias, ne possede pas d'apport permanent d'eau douce et est soumis a une forte influence des marees. Quatre especes d'isopodes ont ete reconnues. Paracerceis sculpta et Cassidinidea mexicana etaient rares, mais Paradella dianae et Uromunna sp. etaient occasionnellement abondantes et largement reparties dans le systeme etudie. Paradella dianae avait une claire tendance a occuper les racines aeriennes de la partie exterieure du systeme (plus proche de la mer) tandis que le contraire etait observe chez Uromunna sp. Les deux especes ont montre une notable tolerance aux variations de salinite (31-38 ppm chez P. dianae ; 31-42 ppm chez Uromunna sp.) et de temperature (24-33°C chez P. dianae ; 21-32°C chez Uromunna ), mais une forte chute de la salinite pendant les mois de pluie a eu une forte influence negative sur l'abondance absolue des deux especes. Quarante deux combinaisons de communautes d'epibiontes ont ete identifiees sur les racines de R. mangle . Uromunna sp. a ete trouvee dans 18 de ces combinaisons et P. dianae dans 12, bien que la presence de ces deux especes dans certaines de ces combinaisons ait ete plutot marginale. Une analyse ANOVA a indique que les macroalgues, seules ou combinees avec d'autres epibiontes, etaient statistiquement plus importantes pour Uromunna sp., tandis que les balanus (seuls ou en combinaison) etaient plus importants pour P. dianae . La proportion des sexes chez Uromunna sp. etait relativement stable tout au long de l'etude (32-49% etaient des mâles), sauf en juin. Une proportion plus grande de femelles ovigeres a ete observee entre octobre et juillet et cette espece semble se reproduire durant toute l'annee. Les mâles de P. dianae etaient toujours domines en nombre par les femelles et/ou les juveniles et representaient, en general, moins de 30% des specimens. Les juveniles ont ete observes dans les echantillons durant quasiment toute l'annee. Les plus grands specimens de Uromunna sp. ont ete observes en mars et en juillet, les plus petits en novembre, decembre et avril. Dans le cas de P. dianae , la plus grande taille a ete notee en avril et en octobre, la plus petite en mars, en aout et en decembre. , Isopods associated with prop roots of Rhizophora mangle were collected in a coastal lagoon system of western Mexico. The system, Estero de Urias, has no permanent freshwater supply and is under strong influence of tides. Four species were recognized. Paracerceis sculpta and Cassidinidea mexicana were rare but Paradella dianae and Uromunna sp. were occasionally abundant and widely distributed within the system. There was a clear tendency for P. dianae to occupy roots in the outer (closer to the inlet) portion of the system, while the opposite occurred with Uromunna sp. Both species were tolerant to some variations in salinity (31-38 ppt in P. dianae ; 31 to 42 ppt in Uromunna ) and temperature (24-33°C in P. dianae ; 21-32°C in Uromunna ), but a drastic drop in salinity during the rainy months had a negative effect on absolute abundance of both species. Forty-two combinations of major sessile epibionts were recorded on prop roots. Uromunna sp. was found associated with 18 of these combinations and P. dianae with 12, although the presence of these two species in some communities was marginal. A one-way ANOVA indicated that macroalgae, alone or combined with other epibionts, were statistically more important for Uromunna sp., while barnacles (alone or combined) were more important for P. dianae . The sex ratio in Uromunna sp. was relatively stable during the entire survey (32-49% were males), except in June. A large proportion of gravid females (9-38%) was observed from October to July and the species appears to reproduce year round. Males of P. dianae were always dominated by females and/or juveniles in number, and usually represented less that 30% of the specimens. Juveniles were present almost all year round. The largest size for Uromunna sp. was observed in March and July; the smallest size in November, December, and April. For P. dianae , the largest size was observed in April and October, the smallest in March, August, and December. Les isopodes associes aux racines aeriennes de Rhizophora mangle ont ete recoltes dans un systeme de lagunes cotieres situe le long de la cote Ouest du Mexique. Ce systeme, l'estero de Urias, ne possede pas d'apport permanent d'eau douce et est soumis a une forte influence des marees. Quatre especes d'isopodes ont ete reconnues. Paracerceis sculpta et Cassidinidea mexicana etaient rares, mais Paradella dianae et Uromunna sp. etaient occasionnellement abondantes et largement reparties dans le systeme etudie. Paradella dianae avait une claire tendance a occuper les racines aeriennes de la partie exterieure du systeme (plus proche de la mer) tandis que le contraire etait observe chez Uromunna sp. Les deux especes ont montre une notable tolerance aux variations de salinite (31-38 ppm chez P. dianae ; 31-42 ppm chez Uromunna sp.) et de temperature (24-33°C chez P. dianae ; 21-32°C chez Uromunna ), mais une forte chute de la salinite pendant les mois de pluie a eu une forte influence negative sur l'abondance absolue des deux especes. Quarante deux combinaisons de communautes d'epibiontes ont ete identifiees sur les racines de R. mangle . Uromunna sp. a ete trouvee dans 18 de ces combinaisons et P. dianae dans 12, bien que la presence de ces deux especes dans certaines de ces combinaisons ait ete plutot marginale. Une analyse ANOVA a indique que les macroalgues, seules ou combinees avec d'autres epibiontes, etaient statistiquement plus importantes pour Uromunna sp., tandis que les balanus (seuls ou en combinaison) etaient plus importants pour P. dianae . La proportion des sexes chez Uromunna sp. etait relativement stable tout au long de l'etude (32-49% etaient des mâles), sauf en juin. Une proportion plus grande de femelles ovigeres a ete observee entre octobre et juillet et cette espece semble se reproduire durant toute l'annee. Les mâles de P. dianae etaient toujours domines en nombre par les femelles et/ou les juveniles et representaient, en general, moins de 30% des specimens. Les juveniles ont ete observes dans les echantillons durant quasiment toute l'annee. Les plus grands specimens de Uromunna sp. ont ete observes en mars et en juillet, les plus petits en novembre, decembre et avril. Dans le cas de P. dianae , la plus grande taille a ete notee en avril et en octobre, la plus petite en mars, en aout et en decembre. ]" @default.
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• W1963557995 title "Distribution of isopods (Peracarida, Isopoda) associated with prop roots of Rhizophora mangle in a tropical coastal lagoon, southeastern Gulf of California, Mexico" @default.
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