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ECOLOGICAL ASPECTS AND SEXUAL MATURITY OF A SOUTHWESTERN ATLANTIC POPULATION OF THE PLANKTONIC SHRIMP LUCIFER FAXONI (DECAPODA: SERGESTOMEA)

Alves Teodoro, Sarah de Souza; Farinelli Pantaleao, Joao Alberto; Negreiros-Fransozo, Maria Lucia; Costa, Rogerio Caetano da
Fonte: Crustacean Soc Publicador: Crustacean Soc
Tipo: Artigo de Revista Científica Formato: 422-430
ENG
Relevância na Pesquisa
17.01%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Processo FAPESP: 04/07309-8; Processo FAPESP: 09/54672-4; Processo FAPESP: 10/50188-8; Processo FAPESP: 04/15194-6; The demographic structure and morphological sexual maturity of the shrimp Lucifer faxoni Borradaile, 1915 are described here. The studied specimens came from Ubatuba Bay, in the north littoral of Sao Paulo State, Brazil. In each month of capture, 14 stations, 7 offshore and 7 inshore, were sampled with neuston nets during high tide periods. Relative growth was analyzed by observing the change in growth patterns of certain parts of the body in relation to somite length and total length (TL). Lucifer faxoni was most abundant in offshore regions. The relationship that best showed the size at the onset of the sexual maturity was the length of the 6th somite of the abdomen vs. TL. The external morphology of the petasma evidenced three development stages and such characteristic was also used to estimate sexual maturity for males using the P-50 technique. Our results show there is a preference of L. faxoni for offshore areas, probably explained by differences in abiotic factors. Both estimates of maturity (relative growth and petasma stage) were very similar. In this context...

Biología de Lucifer faxoni, Borradaile 1915, en Cananéia, Brasil (crustácea, decapoda, luciferidae)

López,Maria T.
Fonte: Instituto Oceanográfico da Universidade de São Paulo Publicador: Instituto Oceanográfico da Universidade de São Paulo
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/1966 ES
Relevância na Pesquisa
17.01%
A total of 149 samples coming from Cananéia (25º lat. S) was analysed. The samples are part of Series E, Plankton Section, Oceanographic Institute of São Paulo. They were taken fortnightly from January 1958 to May 1959 at three fixed stations. Altogether 591 males, 573 females and 1426 juveniles of Lucifer faxoni Borradaile 1915 were studied. The results are as follows: 1 - There is a linear correlation between length of neck and total length. 2 - Sexual maturity is reached at 1.18 mm neck length for the males and 1.19 mm for the females. 3 - Sexual maturity peaks occur in summer and autumn. 4 - Sexual maturity stages were established according to fetasma and ovary development respectively for males and females. 5 - Based on neck length, from size groups may be traced in males. First group of smallest specimens, neck length 0.64-0.80 mm, was present in March, November 1958 and January-February 1959. The second group, neck length 0.83-1.16 mm was present all year round, except in July 1958. The third group also occurred all year round, the neck is longer than 1.18 mm. The largest males neck length 1.70-1.92 mm were present in July, September, October, November 1958 and May 1959. 6 - Females may also be classed in four categories. The first group neck length 0.54-0.90 mm was present in February...

Population ecology of the planktonic shrimp Lucifer faxoni Borradaile, 1915 (Crustacea, Sergestoidea, Luciferidae) of the southeastern coast of Brazil

Teodoro,Sarah de Souza Alves; Negreiros-Fransozo,Maria Lúcia; Simões,Sabrina Morilhas; Lopes,Mateus; Costa,Rogerio Caetano da
Fonte: Universidade de São Paulo, Instituto Oceanográfico Publicador: Universidade de São Paulo, Instituto Oceanográfico
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2012 EN
Relevância na Pesquisa
17.01%
Luciferid shrimps have short life spans and a rapid turnover of generations, engage in sequential spawning, and protect their eggs during incubation. This study investigates the ecology of Lucifer faxoni Borradaile, 1915 in the littoral zone, Ubatuba region, São Paulo. Sampling was conducted monthly from July 2005 to December 2006 using a Renfro net trawled over a distance of 50 m for a total sampling effort of 50 m² at each station. Nine stations were sampled, ranging from 1 to 15 m deep. Three stations each were grouped into zones 1, 2 and 3 (Z1, Z2 and Z3). Monthly values of salinity, temperature and rainfall were recorded at each station. The pre-buccal somite length (SL) of each specimen was measured. The results showed that in shallower zones (Z1 and Z2), 6306 individuals were captured, whereas in the deeper zone (Z3), 3808 specimens were captured, but no significant differences in SL was detected between the specimens from Z1 and Z2 and those from Z3 (ANOVA, p=0.25). The abundance of shrimps did not differ significantly between seasons (Tukey's test, p=0.02) except in the spring. The sex ratio differed significantly over the seasons (χ², p<0.05). The results were closely associated with environmental factors with respect to the spatial and seasonal distribution of L. faxoni. Rainfall affected salinity directly...

Espécies do gênero Lucifer Thompson, 1829 no litoral brasileiro (Decapoda: Luciferidae)

D'Incao, Fernando
Fonte: Universidade Federal do Rio Grande Publicador: Universidade Federal do Rio Grande
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
38.16%
The species of the family Luciferidae in Brazil sere revised. They are represented by Lucifer faxoni that occurs in coastal waters including estuaries, and Lucifer typus an ofsshore specie.

Population ecology of the planktonic shrimp Lucifer faxoni Borradaile, 1915 (Crustacea, Sergestoidea, Luciferidae) of the southeastern coast of Brazil

Teodoro, Sarah de Souza Alves; Negreiros-Fransozo, Maria Lúcia; Simões, Sabrina Morilhas; Lopes, Mateus; Costa, Rogerio Caetano da
Fonte: Universidade de São Paulo. Instituto Oceanográfico Publicador: Universidade de São Paulo. Instituto Oceanográfico
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 01/06/2012 ENG
Relevância na Pesquisa
17.01%
Luciferid shrimps have short life spans and a rapid turnover of generations, engage in sequential spawning, and protect their eggs during incubation. This study investigates the ecology of Lucifer faxoni Borradaile, 1915 in the littoral zone, Ubatuba region, São Paulo. Sampling was conducted monthly from July 2005 to December 2006 using a Renfro net trawled over a distance of 50 m for a total sampling effort of 50 m² at each station. Nine stations were sampled, ranging from 1 to 15 m deep. Three stations each were grouped into zones 1, 2 and 3 (Z1, Z2 and Z3). Monthly values of salinity, temperature and rainfall were recorded at each station. The pre-buccal somite length (SL) of each specimen was measured. The results showed that in shallower zones (Z1 and Z2), 6306 individuals were captured, whereas in the deeper zone (Z3), 3808 specimens were captured, but no significant differences in SL was detected between the specimens from Z1 and Z2 and those from Z3 (ANOVA, p=0.25). The abundance of shrimps did not differ significantly between seasons (Tukey's test, p=0.02) except in the spring. The sex ratio differed significantly over the seasons (χ², p; Este estudo analisa a ecologia de Lucifer faxoni Borradaile, 1915 em Ubatuba...

Biología de Lucifer faxoni, Borradaile 1915, en Cananéia, Brasil (crustácea, decapoda, luciferidae)

López, Maria T.
Fonte: Universidade de São Paulo. Instituto Oceanográfico Publicador: Universidade de São Paulo. Instituto Oceanográfico
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; ; Formato: application/pdf
Publicado em 31/12/1965 SPA
Relevância na Pesquisa
17.01%
A total of 149 samples coming from Cananéia (25º lat. S) was analysed. The samples are part of Series E, Plankton Section, Oceanographic Institute of São Paulo. They were taken fortnightly from January 1958 to May 1959 at three fixed stations. Altogether 591 males, 573 females and 1426 juveniles of Lucifer faxoni Borradaile 1915 were studied. The results are as follows: 1 - There is a linear correlation between length of neck and total length. 2 - Sexual maturity is reached at 1.18 mm neck length for the males and 1.19 mm for the females. 3 - Sexual maturity peaks occur in summer and autumn. 4 - Sexual maturity stages were established according to fetasma and ovary development respectively for males and females. 5 - Based on neck length, from size groups may be traced in males. First group of smallest specimens, neck length 0.64-0.80 mm, was present in March, November 1958 and January-February 1959. The second group, neck length 0.83-1.16 mm was present all year round, except in July 1958. The third group also occurred all year round, the neck is longer than 1.18 mm. The largest males neck length 1.70-1.92 mm were present in July, September, October, November 1958 and May 1959. 6 - Females may also be classed in four categories. The first group neck length 0.54-0.90 mm was present in February...