Desenvolvimento larval de Uca (Minuca) Burgersi Holthuis (Crustacea, Decapoda, Ocypodidae), em laboratório

Rieger, Paulo Juarez

doi:10.1590/s0101-81751998000300017

Cited by 24 publications

(25 citation statements)

References 26 publications

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“…An important phenomenon occurring in many Crustacean groups is the tendency of extending embryonic period and jointly, shortening or eliminating larval phases. It is easy to understand considering how critical is the planktonic life for crabs and how protected embryonic is near maternal abdomen, during pleopodial incubation (Rieger, 1996). According to Rieger (1996), species of genus Uca are facing evolutionary process in a sense of diminishing the number of zoeal stages.…”

Section: Discussionmentioning

confidence: 99%

“…It is easy to understand considering how critical is the planktonic life for crabs and how protected embryonic is near maternal abdomen, during pleopodial incubation (Rieger, 1996). According to Rieger (1996), species of genus Uca are facing evolutionary process in a sense of diminishing the number of zoeal stages. Similar has been observed by U. uruguayensis that seems to still be defining zoeal number, because this species show a large variation of this stage when reared in the laboratory.…”

Section: Discussionmentioning

confidence: 99%

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Reproductive pattern comparison of Uca thayeri Rathbun, 1900 and U. uruguayensis Nobili, 1901 (Crustacea, Decapoda, Ocypodidae)

Costa

Silva

Negreiros-Fransozo

2006

Braz. arch. biol. technol.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Reproductive pattern comparison of Uca thayeri Rathbun, 1900 and U. uruguayensis Nobili, 1901 (Crustacea, Decapoda, Ocypodidae)

Costa

Silva

Negreiros-Fransozo

2006

Braz. arch. biol. technol.

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“…Detailed morphological descriptions of these two were previously reported by Ingle (1985) and Rieger (1999) for P. occidentalis and U. vocator, respectively. Biogeographically, adults of both species are found in mangroves and in the estuarine areas along the coast of the Americas (Atlantic South).…”

Section: Introductionmentioning

confidence: 93%

Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil

Abrunhosa

Simith

Monteiro

et al. 2011

An. Acad. Bras. Ciênc.

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Feeding is an important factor for the successful rearing of larvae of the crab species. Further information on the morphological features of the foregut may to reveal larval feeding behaviour and or/whether there is a lecithotrophy in some or even in all stages of the larval cycle. In the present study, the structural development of the foregut and their digestive functions were examined in larvae of two brachyurans, Uca vocator and Panopeus occidentalis, reared in the laboratory. During larval development, the foreguts of the larvae in the first and last zoeal stages and in the megalopa stage were microscopically examined, described and illustrated. The zoeal foreguts of both species were well developed, showing specialization with a functional cardiopyloric valve and a filter press. The megalopa stage had a complex and specialized gastric mill similar to that found in adult crabs with the appearance of rigidly calcified structures. These results support the hypothesis that the feeding behaviour of each larval stage is directly related to the morphological structure of the foregut. Such facts strongly indicate that all larval stages of both U. vocator and P. occidentalis need an external food source before completing the larval development in a planktonic environment.

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“…However, there are reports of additional zoeal stages in Brachyura, specially in estuarine intertidal species, belonging to portunidae, Xanthoidae, Calappidae, parthenopidae, Grapsoidea and ocypodidae (see Montú et al, 1990;anger, 1991, 2001rieger, 1996and 1998.…”

Section: Larval Tolerance To Low Salinitiesmentioning

confidence: 99%

The effect of salinity on larval development of <em>Uca tangeri</em> (Eydoux, 1835) (Brachyura: Ocypodidae) and new findings of the zoeal morphology

Spivak¹,

Cuesta²

2009

Sci. Mar.

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SuMMary: in order to evaluate their tolerance to low salinities, zoeae of the fiddler crab Uca tangeri from the rio San pedro population (southwestern Spain) were reared in the laboratory at 20ºC and at three salinities (16, 24 and 32). the zoeal development was completed at 24 and 32 but the crabs died as zoea i or zoea ii, and very rarely as zoea iii, at 16; tolerance to low salinities varied among clutches produced by different females. the duration of the first zoeal stage and of the complete zoeal development was shorter at 32. our observations showed that the zoeae of U. tangeri could not tolerate retention in the mesohaline water of estuaries, and that export to oceanic waters would be optimal for their successful development. Survival at 24 suggests that larvae could also develop in polyhaline conditions if they were retained in the ocean-estuary interface. the presence of an additional zoeal stage (zoea vi) was observed in some individuals and associated with unfavourable combinations of temperature and salinity. in addition, some previously omitted aspects of zoeal morphology were re-described and illustrated, providing new evidence which supports the basal position of this species in a proto-atlantic origin of the genus Uca. it is proposed that the differences between Uca tangeri and the rest of the Uca species should be highlighted, and that it should be placed in its own genus as Afruca tangeri.Keywords: larval development, salinity, mortality, duration of development, ocypodidae, Uca, fiddler crab, zoeal morphology. rESuMEN: Efecto de la salinidad en el desarrollo larvario de Uca tangeri (Eydoux, 1835) (Brachyura: Ocypodidae) y nuevos hallazgos sobre la morfología de las zoeas. -Se cultivaron zoeas del cangrejo violinista Uca tangeri de la población del río San pedro (Suroeste de España) en el laboratorio a salinidades de 16, 24 y 32, y una temperatura de 20ºC, para evaluar su tolerancia a salinidades bajas. Las larvas completaron el desarrollo como zoeas a 24 y 32 pero murieron como zoea i, como zoea ii o, muy raramente, como zoea iii a 16; la tolerancia a las salinidades bajas varió entre las camadas producidas por diferentes hembras. La duración del primer estado y del desarrollo completo de las zoeas fue más corto a 32. Nuestras observaciones muestran que las zoeas de U. tangeri no tolerarían la retención en las aguas mesohalinas de estuarios y que la exportación hacia aguas oceánicas sería óptima para el éxito de su desarrollo. La supervivencia a 24 sugiere que las larvas también podrían desarrollarse en condiciones polihalinas si fueran retenidas en la interfase océano-estuario. Se observó la presencia de un estadio zoea adicional (zoea vi) en algunos individuos, que se asoció con condiciones desfavorables de temperatura y salinidad. Finalmente, se redescribieron e ilustraron algunos aspectos previamente omitidos de la morfología de las zoeas, que constituyen nuevas evidencias que favorecen la posición basal de esta especies en el origen proto-atlántico del género Uca. Se propone la convenien...

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Desenvolvimento larval de Uca (Minuca) Burgersi Holthuis (Crustacea, Decapoda, Ocypodidae), em laboratório

Cited by 24 publications

References 26 publications

Reproductive pattern comparison of Uca thayeri Rathbun, 1900 and U. uruguayensis Nobili, 1901 (Crustacea, Decapoda, Ocypodidae)

Reproductive pattern comparison of Uca thayeri Rathbun, 1900 and U. uruguayensis Nobili, 1901 (Crustacea, Decapoda, Ocypodidae)

Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil

The effect of salinity on larval development of <em>Uca tangeri</em> (Eydoux, 1835) (Brachyura: Ocypodidae) and new findings of the zoeal morphology

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