Population structure, size at first sexual maturity, and feeding ecology of Conodon nobilis (Actinopterygii: Perciformes: Haemulidae) from the coasts of Pernambuco, north-eastern Brazil

Ucides cordatusis a semi-terrestrial crab and key species endemic to mangrove areas of eastern Americas. In North-eastern Brazil this crab holds a major socio-economic function for artisanal fisheries, as in the São Francisco River Estuary (10°30′27″S 36°23′45″W). Nevertheless, decreases in this species’ stock have been reported since 2000, requiring assessments of the crab population for conservation and management purposes. This study aims at assessing the population status and the fishery potential of this species in the mangroves of this estuary and suggests strategies for its fishery and conservation, according to the guidelines of the National Management Plan forU. cordatusSustainable Use. Six different sites established in 30 km2of mangroves were sampled, with the density ofU. cordatusburrows estimated to evaluate the population structure using the measure of burrow diameters. Results show that the crab mean burrow size was 56.82 (±12.2) mm and that the medium-size crabs (40–70 mm) are the most abundant. The total mean crab density was 1.2 crabs m−2, from which the density of crabs in commercial size (0.85 ± 0.55 crabs m−2) was significantly higher than those in non-commercial size (0.35 ± 0.21 burrow m−2). These mangroves showed a high potential for the crab fishery, with an immediate extractive potential (IEP) of 71.2% and future extractive potential (FEP) of 28.8%. Nevertheless, a lower crab density, probably due to high crab mortality, mangrove deforestation for shrimp farming and high fishery pressure, is a limiting factor for local fishery. We conclude that mangrove areas more appropriate forU. cordatusfishery (extractive areas) show higher mean crab size, IEP and density of commercial crabs, wherein a fixed exploitation rate or/and a fixed escapement rule should be considered. Exclusion areas, intended for the conservation, show lower values of these population parameters and higher FEP, wherein the fishery should be prohibited. These management strategies should also be considered in other Brazilian mangrove areas showing similar crab population structure, thus contributing to the National Management Plan forU. cordatusSustainable Use.

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Reproductive biology of the land crab Cardisoma guanhumi (Decapoda: Gecarcinidae) in north-eastern Brazil

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315412000951 ◽

2012 ◽

Vol 93 (3) ◽

pp. 761-768 ◽

Cited By ~ 4

Author(s):

Renata Akemi Shinozaki-Mendes ◽

José Roberto Feitosa Silva ◽

Jones Santander-Neto ◽

Fábio Hissa Vieira Hazin

Keyword(s):

Sexual Maturity ◽

Histological Analysis ◽

Carapace Width ◽

Gonadal Maturation ◽

Land Crab ◽

Eastern Brazil ◽

North Eastern ◽

Cardisoma Guanhumi ◽

Maturation Stages ◽

First Maturity

The reproductive cycle of Cardisoma guanhumi was described from the analysis of seasonal variation of the gonadal maturation stages. The first maturity for both sexes was determined based on three different tests: inflexion point on the curve; relevant character (morphometry); and histological analysis (physiology). In addition, some aspects of sexual dimorphism for the population were studied. A total of 353 individuals caught in north-eastern Brazil between December 2006 and November 2007 were analysed. The sex-ratio was statistically equal (P ≥ 0.05) and the carapace width (CW) of the females ranged from 4.34 to 8.56 cm and of the males from 2.84 to 9.22 cm. Mature females with fully developed gonads begin to appear in the dry season (August) and ovigerous females occurred from November to February, suggesting that spawning occurs mainly during the rainy season. The CW of first sexual maturity for females ranged from 5.87 cm to 6.70 cm and males from 6.22 cm to 7.20 cm. The highest percentage of individuals caught were juveniles, indicating the need for a targeted effort to preserve the species.

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Reproductive biology and population structure ofAxianassa australis(Crustacea, Axianassidae) on a sand-mud flat in north-eastern Brazil

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s002531541400174x ◽

2015 ◽

Vol 95 (4) ◽

pp. 735-745 ◽

Cited By ~ 2

Author(s):

M.L. Botter-Carvalho ◽

L.B. Costa ◽

L.L. Gomes ◽

C.C.C. Clemente ◽

P.V.V. Da C. Carvalho

Keyword(s):

Population Structure ◽

Reproductive Biology ◽

Somatic Growth ◽

Allometric Growth ◽

Differential Growth ◽

Left Handedness ◽

Eastern Brazil ◽

North Eastern ◽

Mud Flat ◽

Major Cheliped

The life history of the mud shrimpAxianassa australis, a common and widespread burrower inhabiting coastal mangroves and mud flats, is poorly known. This contribution presents the first information about the population structure, reproductive biology and fecundity ofA. australis, based on individuals collected from September 2011 to December 2012 on Casa Caiada Beach, located in a densely urbanized area in north-eastern Brazil, using a yabby pump. The sex ratio did not depart significantly from the expected 1:1 proportion. A significant trend of left-handedness of the major cheliped was observed in the population. Females reached a larger maximum cephalothorax length (CL) than males. The differential growth between CL and the propodus of the major cheliped showed negative allometric growth for females and positive allometric growth for males, suggesting a trade-off between somatic growth and reproductive effort. Females bearing uneyed orange embryos predominated during all months in which ovigerous females were collected. Mean fecundity was 2379 eggs, ranging from 5 (7.55 mm CL) to 8300 (14.19 mm CL) eggs per female. About 71% of the variation in the number of eggs carried per female was explained by CL. The mean egg size correlated negatively with fecundity, indicating that large females ofA. australisproduce more and larger eggs than smaller females.

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Population structure of nurse sharks, Ginglymostoma cirratum (Orectolobiformes), caught off Ceará State, Brazil, south-western Equatorial Atlantic

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315410001293 ◽

2010 ◽

Vol 91 (6) ◽

pp. 1193-1196 ◽

Cited By ~ 6

Author(s):

Jones Santander-Neto ◽

Renata A. Shinozaki-Mendes ◽

Leonardo M. Silveira ◽

Bruno Jucá-Queiroz ◽

Manuel A.A. Furtado-Neto ◽

...

Keyword(s):

Population Structure ◽

Seasonal Pattern ◽

Equatorial Atlantic ◽

Nurse Shark ◽

Female Ratio ◽

Eastern Brazil ◽

North Eastern ◽

Ginglymostoma Cirratum ◽

Male Female Ratio ◽

Nurse Sharks

The nurse shark, Ginglymostoma cirratum, is considered an endangered species in Brazil and its capture by fisheries forbidden. Despite such legislation, nurse sharks continue to be caught as these laws are unenforced and fisheries are not monitored. The goal of the present study was to describe the population structure of nurse sharks caught off Ceará State, north-eastern Brazil, based on the following aspects: abundance and size, sex-ratio, fisheries incidence and seasonality of captures. Landings were monitored weekly during a two-year period. A total of 189 specimens were recorded. Total length (TL) varied between 73 and 274 cm. The male–female ratio did not differ significantly (1.19♀:1♂). TL of individuals landed as carcasses was estimated based on interdorsal length. The following equation was obtained for males and females: TL = 12.606ID + 14.24 (R2 = 0.9505). Most of the landed sharks were juveniles (86.2%). No seasonal pattern of abundance and TL variation was observed. Management of this fishery is required in order to prevent localized over-fishing of nurse sharks.

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CERATOPOCONIDAE 1 (DIPTERA) FROM NORTH-EASTERN BRAZIL

Proceedings of the Royal Entomological Society of London Series B Taxonomy ◽

10.1111/j.1365-3113.1940.tb00348.x ◽

2009 ◽

Vol 9 (5) ◽

pp. 73-79

Author(s):

J. W. S. Macfie

Keyword(s):

Eastern Brazil ◽

North Eastern

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Taxonomy of Nystiellidae (Caenogastropoda, Epitonioidea) from Brazil, with description of three new species from the South-western Atlantic

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315417000984 ◽

2017 ◽

Vol 98 (7) ◽

pp. 1619-1644 ◽

Cited By ~ 1

Author(s):

Alexandre Dias Pimenta ◽

Bruno Garcia Andrade ◽

Ricardo Silva Absalão

Keyword(s):

Rio Grande ◽

Taxonomic Revision ◽

South Atlantic ◽

Shell Morphology ◽

The South ◽

Western Atlantic ◽

North East ◽

The North ◽

Eastern Brazil ◽

North Eastern

A taxonomic revision of the Nystiellidae from Brazil, including samples from the Rio Grande Rise, South Atlantic, was performed based on shell morphology. Five genera and 17 species were recognized. For the richest genus,Eccliseogyra, the three species previously recorded from Brazil were revised:E. brasiliensisandE. maracatu, previously known only from their respective type series, were re-examined. Newly available material ofE. maracatuexpanded the known geographic range of this species to off south-east Brazil.Eccliseogyra nitidais now recorded from north-eastern to south-eastern Brazil, as well as from the Rio Grande Rise. Three species ofEccliseogyraare newly recorded from the South Atlantic:E. monnioti, previously known from the north-eastern Atlantic, occurs off eastern Brazil and on the Rio Grande Rise; its protoconch is described for the first time, confirming its family allocation.Eccliseogyra pyrrhiasoccurs off eastern Brazil and on the Rio Grande Rise, andE. folinioff eastern Brazil. The genusIphitusis newly recorded from the South Atlantic.Iphitus robertsiwas found off northern Brazil, although the shells show some differences from the type material, with less-pronounced spiral keels. Additional new finds showed thatIphitus cancellatusranges from eastern Brazil to the Rio Grande Rise, and Iphitusnotiossp. nov. is restricted to the Rio Grande Rise.Narrimania, previously recorded from Brazil based on dubious records, is confirmed, including the only two living species described for the genus:N. azelotes, previously only known from the type locality in Florida, andN. concinna, previously known from the Mediterranean. A third species,Narrimania raquelaesp. nov. is described from eastern Brazil, diagnosed by its numerous and thinner cancellate sculpture. To the three species ofOpaliopsispreviously known from Brazil, a fourth species,O. arnaldoisp. nov., is added from eastern Brazil, and diagnosed by its very thin spiral sculpture, absence of a varix, and thinner microscopic parallel axial striae.Papuliscala nordestina, originally described from north-east Brazil, is recorded off eastern Brazil and synonymized withP. elongata, a species previously known only from the North Atlantic.

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Temporal and spatial patterns on serra, Scomberomorus brasiliensis (Teleostei, Scombridae), catches from the fisheries on the Maranhão coast, Brazil

Brazilian Journal of Biology ◽

10.1590/s1519-69842001000400003 ◽

2001 ◽

Vol 61 (4) ◽

pp. 541-546 ◽

Cited By ~ 6

Author(s):

V. da BATISTA ◽

N. N. FABRÉ

Keyword(s):

Spatial Patterns ◽

Relative Abundance ◽

West Coast ◽

The West ◽

Temporal And Spatial Patterns ◽

Eastern Brazil ◽

North Eastern ◽

Displacement Pattern ◽

Temporal And Spatial ◽

Demersal Species

The displacement pattern of the serra, Scomberomorus brasiliensis, in North-eastern Brazil was analyzed from landing data recorded from the fleet fishing serra. Serra fishery has two seasons: from September to February (demersal species plus serra), and from March to August (almost only large amounts of serra). S. brasiliensis relative abundance increases similarly along the coast from March, but decreases first on the West coast from June. Records indicate that serra is near the coast at least until September/October in Eastern grounds. From October to March (strongest spawning season) there is no record of shoals on the coast. We concluded that the Maranhão coast is just a part of the migration circuit of S. brasiliensis that may exceed 300 nautical miles.

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Biological spectrum and dispersal syndromes in an area of the semi-arid region of north-eastern Brazil

Acta Scientiarum Biological Sciences ◽

10.4025/actascibiolsci.v37i1.23141 ◽

2015 ◽

Vol 37 (1) ◽

pp. 91 ◽

Cited By ~ 2

Author(s):

Elimar Alves de Lima ◽

José Iranildo Miranda de Melo

Keyword(s):

Arid Region ◽

Dispersal Syndromes ◽

Eastern Brazil ◽

North Eastern ◽

Semi Arid Region ◽

Biological Spectrum ◽

Semi Arid

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Descriptive and illustrated diagnosis of Ophiuroidea fauna (Echinodermata) in the shallow waters of North-eastern Brazil

Marine Biodiversity Records ◽

10.1017/s1755267215000652 ◽

2015 ◽

Vol 8 ◽

Author(s):

Fabilene Gomes Paim ◽

Maria Cecília Guerrazzi ◽

Michela Borges

Keyword(s):

Brittle Star ◽

Shallow Waters ◽

Bottom Substrate ◽

Eastern Brazil ◽

North Eastern ◽

Amphipholis Squamata ◽

Biological Substrates ◽

Almost All ◽

First Time ◽

Ophiocoma Echinata

In this study, we present descriptions, illustrations, comments, and bathymetric and geographic distributions of the brittle star species related to the estuary region of Camamu Bay, located in the State of Bahia, Brazil. The brittle star fauna lives on biological substrates, sand bottoms, mud and rubble in the Camamu Bay and comprises 12 species divided into five families. Almost all of them are common in the tropical and subtropical fauna of the regions of shallow water.Ophiophragmus filograneusis reported for the first time in Bahia, and nine other species are recorded for the first time in Camamu Bay:Amphipholis januarii, Amphipholis squamata, Ophiophragmus filograneus, Ophiostigma isocanthum,Ophioderma cinerea, Ophioderma januarii, Ophiactis lymani, Ophiactis savignyi andOphiocoma echinata.The results suggest that the ophiuroid assemblages are strongly affected by marine currents as well as by different kinds of bottom substrate.

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