Arbacia lixula (Linnaeus, 1758) is a common echinoid on the Brazilian coast, although there are f... more Arbacia lixula (Linnaeus, 1758) is a common echinoid on the Brazilian coast, although there are few studies about this species in the South Atlantic Ocean. This work aims to compare morphological and reproductive traits in two sea urchin populations and verify the reproductive cycle of Arbacia lixula using gonadal index, maturity index and histological analysis of the gonads. Monthly 15 to 20 specimens were collected by free diving in Prainha, Arraial do Cabo and in Ponta de Itaipu, Niterói. The specimens captured were weighed and had the test diameter and height measured before dissection. The body components indexes were calculated. Each specimen had one gonad analyzed histologically to verify gametogenic stages. The reproductive cycle was fast and continuous showing production and spawning of gametes all the period. Morphological differences were found among diameter, height, and weight of the tests and length of Aristotle's lantern. The results of this study suggest that phe...
O homem e o mar possuem uma relação histórica de trocas nem sempre positiva para ambos os lados, ... more O homem e o mar possuem uma relação histórica de trocas nem sempre positiva para ambos os lados, com um cenário que comumente sofre alterações locais. No atual contexto da pandemia de covid-19, efeitos no ambiente marinho podem ser observados. Este trabalho teve como objetivo proporcionar um panorama inicial e geral sobre os efeitos pandêmicos na vida marinha e ambientes costeiros do Brasil. Para isso, realizamos um clipping científico, a coleta de depoimentos de profissionais engajados e atuantes nas questões relacionadas ao oceano e a avaliação dos boletins de lixo nas praias do litoral norte de São Paulo. A clipagem evidenciou aspectos positivos e negativos do efeito pandêmico, alguns dos quais foram discutidos em conteúdos de divulgação científica, com mais de 50 mil visualizações na rede social Instagram. Os depoimentos evidenciaram alguns efeitos causados pela pandemia no território brasileiro, disponibilizando informações ainda não publicadas sobre os benefícios e desafios en...
FIGURE 2: Gynandromorph of Xylocopa (Neoxylocopa) varipuncta Patton, 1879: (A) Dorsal habitus; (B... more FIGURE 2: Gynandromorph of Xylocopa (Neoxylocopa) varipuncta Patton, 1879: (A) Dorsal habitus; (B) Head in frontal view; (C) Right lateral habitus; (D) Left lateral habitus. Scale bars = 1 mm. (Photos: Paula C. Zama).
Gynandromorphism is the most common case of sexual anomaly reported in bees and is characterized ... more Gynandromorphism is the most common case of sexual anomaly reported in bees and is characterized by individuals that show male and female traits simultaneously in the body. Gynandromorphic cases have been reported for 140 species of bees, an underestimated number comparing to the twenty thousand bee species described nowadays. Here we describe and illustrate the first case of a gynandromorphic Xylocopa darwini Cockerell, 1926 and the fourth case of Xylocopa varipuncta Patton, 1879. The specimens show a mixed form of gynandromorphism with predominantly female features and with all its male traits concentrated in one side of the body, right side in X. darwini and left side in X. varipuncta. The gynanders of X. darwini and X. varipuncta were collected on Isabela Island (Galapagos – Ecuador) and Riverside (California – USA), and were deposited in Smithsonian Collection and California Academy of Sciences, respectively. Including this work, eighteen cases of gynandromorphism were reported...
Gynandromorphism is the most common case of sexual anomaly reported in bees and is characterized ... more Gynandromorphism is the most common case of sexual anomaly reported in bees and is characterized by individuals that show male and female traits simultaneously in the body. Gynandromorphic cases have been reported for 140 species of bees, an underestimated number comparing to the twenty thousand bee species described nowadays. Here we describe and illustrate the first case of a gynandromorphic Xylocopa darwini Cockerell, 1926 and the fourth case of Xylocopa varipuncta Patton, 1879. The specimens show a mixed form of gynandromorphism with predominantly female features and with all its male traits concentrated in one side of the body, right side in X. darwini and left side in X. varipuncta. The gynanders of X. darwini and X. varipuncta were collected on Isabela Island (Galapagos – Ecuador) and Riverside (California – USA), and were deposited in Smithsonian Collection and California Academy of Sciences, respectively. Including this work, eighteen cases of gynandromorphism were reported...
Arbacia lixula (Linnaeus, 1758) is a common echinoid on the Brazilian coast, although there are f... more Arbacia lixula (Linnaeus, 1758) is a common echinoid on the Brazilian coast, although there are few studies about this species in the South Atlantic Ocean. This work aims to compare morphological and reproductive traits in two sea urchin populations and verify the reproductive cycle of Arbacia lixula using gonadal index, maturity index and histological analysis of the gonads. Monthly 15 to 20 specimens were collected by free diving in Prainha, Arraial do Cabo and in Ponta de Itaipu, Niterói. The specimens captured were weighed and had the test diameter and height measured before dissection. The body components indexes were calculated. Each specimen had one gonad analyzed histologically to verify gametogenic stages. The reproductive cycle was fast and continuous showing production and spawning of gametes all the period. Morphological differences were found among diameter, height, and weight of the tests and length of Aristotle's lantern. The results of this study suggest that phe...
O homem e o mar possuem uma relação histórica de trocas nem sempre positiva para ambos os lados, ... more O homem e o mar possuem uma relação histórica de trocas nem sempre positiva para ambos os lados, com um cenário que comumente sofre alterações locais. No atual contexto da pandemia de covid-19, efeitos no ambiente marinho podem ser observados. Este trabalho teve como objetivo proporcionar um panorama inicial e geral sobre os efeitos pandêmicos na vida marinha e ambientes costeiros do Brasil. Para isso, realizamos um clipping científico, a coleta de depoimentos de profissionais engajados e atuantes nas questões relacionadas ao oceano e a avaliação dos boletins de lixo nas praias do litoral norte de São Paulo. A clipagem evidenciou aspectos positivos e negativos do efeito pandêmico, alguns dos quais foram discutidos em conteúdos de divulgação científica, com mais de 50 mil visualizações na rede social Instagram. Os depoimentos evidenciaram alguns efeitos causados pela pandemia no território brasileiro, disponibilizando informações ainda não publicadas sobre os benefícios e desafios en...
FIGURE 2: Gynandromorph of Xylocopa (Neoxylocopa) varipuncta Patton, 1879: (A) Dorsal habitus; (B... more FIGURE 2: Gynandromorph of Xylocopa (Neoxylocopa) varipuncta Patton, 1879: (A) Dorsal habitus; (B) Head in frontal view; (C) Right lateral habitus; (D) Left lateral habitus. Scale bars = 1 mm. (Photos: Paula C. Zama).
Gynandromorphism is the most common case of sexual anomaly reported in bees and is characterized ... more Gynandromorphism is the most common case of sexual anomaly reported in bees and is characterized by individuals that show male and female traits simultaneously in the body. Gynandromorphic cases have been reported for 140 species of bees, an underestimated number comparing to the twenty thousand bee species described nowadays. Here we describe and illustrate the first case of a gynandromorphic Xylocopa darwini Cockerell, 1926 and the fourth case of Xylocopa varipuncta Patton, 1879. The specimens show a mixed form of gynandromorphism with predominantly female features and with all its male traits concentrated in one side of the body, right side in X. darwini and left side in X. varipuncta. The gynanders of X. darwini and X. varipuncta were collected on Isabela Island (Galapagos – Ecuador) and Riverside (California – USA), and were deposited in Smithsonian Collection and California Academy of Sciences, respectively. Including this work, eighteen cases of gynandromorphism were reported...
Gynandromorphism is the most common case of sexual anomaly reported in bees and is characterized ... more Gynandromorphism is the most common case of sexual anomaly reported in bees and is characterized by individuals that show male and female traits simultaneously in the body. Gynandromorphic cases have been reported for 140 species of bees, an underestimated number comparing to the twenty thousand bee species described nowadays. Here we describe and illustrate the first case of a gynandromorphic Xylocopa darwini Cockerell, 1926 and the fourth case of Xylocopa varipuncta Patton, 1879. The specimens show a mixed form of gynandromorphism with predominantly female features and with all its male traits concentrated in one side of the body, right side in X. darwini and left side in X. varipuncta. The gynanders of X. darwini and X. varipuncta were collected on Isabela Island (Galapagos – Ecuador) and Riverside (California – USA), and were deposited in Smithsonian Collection and California Academy of Sciences, respectively. Including this work, eighteen cases of gynandromorphism were reported...
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