Distribution and reproductive biology of the lentil bobtail squid,Rondeletiola minor(Cephalopoda: Sepiolidae) from the Portuguese Atlantic Coast

Cabot's Terns Thalasseus acuflavidus (Latham, 1737) are widely distributed along the Atlantic coast of South America from the Caribbean Islands (12º S) to the region of Porto Deseado, Argentina (46º S). Daily observations were conducted on the Cardos Island during 2003, 2005 and 2006 to determine timing and nesting success, and the reproductive biology of the Cabot's Terns nesting there. The first adults arrived at the colony from 22 April to 15 May during the three years recorded; a total of 144 nests were recorded in 2003, 174 in 2005 and 50 in 2006. Observed incubation time was 24.1 ± 0.35 days, and mean egg size was 5.15 ± 0.02 cm in length and 34.30 ± 0.25 g in weight. Hatching success was lowest in 2003 and highest in 2006, with natural causes (such as nest abandonment, flooding, inter and intra-specific fight) being the main cause of loss. The first eggs hatched in July in 2003, and in June in 2005 and 2006. Overall nesting success was lowest (4.00%) in 2006 and much higher (36.1% and 27.01%, respectively) in 2003 and 2005.

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BIOLOGIA REPRODUTIVA DE Neomarica northiana (SCHNEEV) SPRAGUE (IRIDACEAE): “MERANTHIA” - UM CASO ESPECIAL DE POLINIZAÇÃO = REPRODUCTIVE BIOLOGY OF Neomarica northiana (SCHNEEV) SPRAGUE (IRIDACEAE)

Boletim do Laboratório de Hidrobiologia ◽

10.18764/1981-6421e2021.8 ◽

2021 ◽

Vol 31 (2) ◽

Author(s):

André Luiz Gomes da Silva

Keyword(s):

Reproductive Biology ◽

Clonal Growth ◽

Chromatographic Analysis ◽

Rio De Janeiro ◽

Atlantic Coast ◽

Fruit Production ◽

Perennial Herb ◽

Broadleaf Forest ◽

Natural Pollination ◽

Floral Resource

Este trabalho teve como objetivo estudar a biologia reprodutiva de Neomarica northiana (Schneev) Sprague (Iridaceae), erva perene que ocorre nas restingas do estado do Rio de Janeiro. A flor desta espécie apresenta três unidades funcionais de polinização denominada “meranthia”. O recurso floral oferecido aos polinizadores é a substância lipídica exsudada na base das tépalas. Análise de cromotografia gasosa das tépalas indicou a presença de limoneno. As flores de N. northiana são polinizadas exclusivamente por abelhas poliléticas de grande porte, Xylocopa sp.. Neomarica northiana é autocompatível. A produção de frutos por polinização natural foi maior do que a produção por polinização manual cruzada. A taxa de fecundidade é de 0,47. Neomarica northiana apresenta crescimento clonal que pode ocorrer de duas formas distintas, por meio do caule rizomatoso e por meio de bulbilhos formados na axila das brácteas.AbstractThe objective of this research was to evaluate the reproductive biology of Neomarica northiana (Iridaceae), a perennial herb that occurs in the Atlantic Coast restingas (humid subtropical broadleaf forest) of the state of Rio de Janeiro. Each flower of this species has three functional pollinating units called “meranthia”. The main floral resource provided to bees by Neomarica northiana is a lipid substance exuded at the base of the tepals. Gas-chromatographic analysis of tepal samples revealed the presence of limonene. Flowers of N. northiana are pollinated exclusively by large bodied species of bees (Xylocopa sp.). Fruit production from natural pollination is higher than from manual pollination. The fecundity rate is 0.47. Neomarica northiana has clonal growth, which may occur by means of the rhizomatous stem, which produces offshoots close to one another; or by means of axillary bulbils.

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Reproductive biology of Neohelice granulata (Decapoda: Varunidae) in two salt marshes of the estuarine region of the Lagoa dos Patos Lagoon, southern Brazil

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s002531540800252x ◽

2008 ◽

Vol 89 (4) ◽

pp. 769-774 ◽

Cited By ~ 3

Author(s):

Roberta A. Barutot ◽

Fernando D'Incao ◽

Duane B. Fonseca

Keyword(s):

Reproductive Biology ◽

Salt Marshes ◽

Atlantic Coast ◽

Organic Matter Content ◽

Matter Content ◽

Southern Brazil ◽

Patos Lagoon ◽

Neohelice Granulata ◽

Males And Females ◽

Estuarine Region

Neohelice granulata is a crab found in salt marshes and mangroves of the south and south-eastern Atlantic coast of South America. Reproductive biology was studied by taking samples for two years at two salt marshes—‘Prainha’ and ‘Ilha’—in the estuarine region of Patos Lagoon (southern Brazil). Ovigerous females were found most of the year in both salt marshes with average CW ranging from 18.5 (Prainha) to 22.8 mm (Ilha). A significant linear relationship was found between log(CW) and log(number of eggs). Average size at the onset of maturation was 14.9 and 14 mm at Prainha, for males and females, respectively, while at Ilha it was 18.2 and 16.8 mm, for males and females, respectively. Results provided evidence of significant differences in reproductive traits between populations of the two salt marshes. Differences are likely related to the higher organic matter content found in the sediment from Ilha.

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Fine structure and possible functions of the hermaphrodite duct of some pulmonate snails (Mollusca: Gastropoda)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100157887 ◽

1990 ◽

Vol 48 (3) ◽

pp. 68-69

Author(s):

Alan N. Hodgson

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Fine Structure ◽

Seminal Vesicle ◽

Reproductive Biology ◽

Light Microscope ◽

Light Microscope Level ◽

Transmission Electron ◽

Standard Techniques

The hermaphrodite duct of pulmonate snails connects the ovotestis to the fertilization pouch. The duct is typically divided into three zones; aproximal duct which leaves the ovotestis, the middle duct (seminal vesicle) and the distal ovotestis duct. The seminal vesicle forms the major portion of the duct and is thought to store sperm prior to copulation. In addition the duct may also play a role in sperm maturation and degredation. Although the structure of the seminal vesicle has been described for a number of snails at the light microscope level there appear to be only two descriptions of the ultrastructure of this tissue. Clearly if the role of the hermaphrodite duct in the reproductive biology of pulmonatesis to be understood, knowledge of its fine structure is required.Hermaphrodite ducts, both containing and lacking sperm, of species of the terrestrial pulmonate genera Sphincterochila, Levantina, and Helix and the marine pulmonate genus Siphonaria were prepared for transmission electron microscopy by standard techniques.

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