Reproductive biology of Hepatus pudibundus (Crustacea: Brachyura), the most abundant crab on the southeastern Brazilian coast

Biologia ◽  
2014 ◽  
Vol 69 (2) ◽  
Author(s):  
Paloma Aparecida de Lima ◽  
Giovana Bertini ◽  
Vivian Fransozo ◽  
Rafael Gregati ◽  
Lissandra Corrêa Fernandes-Góes ◽  
...  
Keyword(s):  
Bottom Water ◽  
Carapace Width ◽  
Sampling Period ◽  
Reproductive Activity ◽  
Gonadal Development ◽  
Reproductive Period ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Adult Males ◽  
Bottom Water Temperature

AbstractThis study analyzed the size at sexual maturity and reproductive period of populations of Hepatus pudibundus in three bays on the northern coast of São Paulo, Brazil. Crabs were collected monthly and the bottom-water temperature was measured at each collection point. The animals were sexed, measured for carapace width (CW), and their gonadal stages were determined. A total of 8,674 specimens were collected (2,435 males and 6,239 females). Adult males showed the highest mean CW; the size at maturity for both sexes was 32.5 mm CW. Reproduction was continuous and peaked in spring and summer, because of the greater availability of plankton food for the larvae. This pattern is typical in tropical and subtropical regions, unlike the seasonal reproduction found in temperate regions. Reproductive activity of females was not significantly correlated with bottom-water temperatures. Immatures and individuals in all stages of gonadal development were found throughout the sampling period and at all depths, probably because the species completes its entire reproductive cycle in that area.

Population dynamics of Sesarma rectum (Crustacea: Brachyura: Grapsidae) in the Ariquindá River mangrove, north-east of Brazil

2011 ◽  
Vol 91 (7) ◽  
pp. 1395-1401 ◽  
Author(s):  
Daniela da Silva Castiglioni ◽  
Paloma Joana Albuquerque de Oliveira ◽  
Josivan Soares da Silva ◽  
Petrônio Alves Coelho
Keyword(s):  
Sex Ratio ◽  
Sexual Maturity ◽  
Carapace Width ◽  
Reproductive Activity ◽  
Reproductive Period ◽  
Size Class ◽  
Adult Males ◽  
North East ◽  
Class Frequency ◽  
Autumn And Winter

This study was carried out in order to provide basic information on the population ecology of the crab Sesarma rectum in the Ariquindá River mangrove, Tamandaré, State of Pernambuco, Brazil. The population was analysed with regard to the following aspects, in particular: the size-class frequency distribution of carapace width (CW), mean body size (CW) of males and females, morphological sexual maturity, sex-ratio, reproductive period, and recruitment. Samples were collected monthly from April 2008 through to March 2009; the crabs were collected manually, with a capture effort by one person for 30 minutes, during low tide. The specimens obtained were measured for CW, length of the propodus of males, and abdomen width of females; and the sex and ovigerous condition were noted. Altogether, we obtained 511 specimens (132 juvenile and 137 adult males, and 171 juvenile and 71 adult females, of which 32 were ovigerous). The median CW of males (16.15 mm) was significantly larger than that of females (13.82 mm) (P < 0.05). The size at morphological sexual maturity was 15.73 mm in males and 16.71 mm in females. The sex-ratio for the total of specimens analysed was 1.11:1 (male:female) (P > 0.05). The sex-ratio by size-class showed an anomalous pattern, with a greater abundance of males in the larger size-classes. The reproductive period was continuous and the highest frequency of ovigerous females was recorded in the spring and summer. The major pulse of recruitment occurred during autumn and winter, which is related to greater reproductive activity during the warmer months of the year.

scholarly journals Actividad reproductiva y dieta de Hemidactylus frenatus (Sauria: Gekkonidae) en el norte de Colombia

2017 ◽  
Vol 57 (36) ◽  
pp. 459
Author(s):  
Jorge A. Díaz-Pérez ◽  
Alcides C. Sampedro-Marín ◽  
Martha P. Ramírez-Pinilla
Keyword(s):  
Diet Composition ◽  
Sampling Period ◽  
Reproductive Activity ◽  
Climatic Conditions ◽  
Relative Importance ◽  
Adult Males ◽  
Adult Females ◽  
Ecological Aspects ◽  
Environmental Availability ◽  
Hemidactylus Frenatus

Despite its success as an invasive species, little is known about the ecological aspects of the gekkonid lizard Hemidactylus frenatus in Colombia. In the present study the size at maturity, sexual dimorphism, reproductive activity, and diet composition of a population of this species in an urban locality of Northern Colombia were determined. We conducted eleven samplings from September 2011 to August 2012 in buildings of the municipality of Sincelejo. A total of 264 specimens H. frenatus were captured, 112 were adult females, 133 adult males and 19 juveniles. Males reach sexual maturity at a smaller size (snout-vent length) than females (males: 35.7 mm; females: 42.7 mm), also they are larger and have proportionally larger heads and mouths than females. Males were reproductive throughout the year; although testicular volume varied significantly between samples, this variation was not associated with body size and precipitation in the study area. Reproductive adult females were found during all the sampling period. Females have an invariable clutch size of two eggs and we found no differences in the diameter and weight of eggs in each oviduct. The diet of H. frenatus is varied, with Diptera, Hemiptera and Formicidae being the prey types with the greatest relative importance values. Individuals of both sexes consume a similar volume and number of prey. Thus, the studied population of H. frenatus has continuous reproductive activity and a generalist-opportunistic feeding behavior. The climatic conditions of the study area, environmental availability of prey and intrinsic features of this species appear to be responsible for their abundance and colonizing success in this and other localities.

scholarly journals Reproductive biology of the swimming crab Achelous spinimanus (Decapoda, Portunoidea): a potential fishing resource

2020 ◽  
Vol 110 ◽  
Author(s):  
Aline N. Sousa ◽  
Veronica P. Bernardes ◽  
Camila H. Bernardo ◽  
Fabiano G. Taddei ◽  
Gustavo M. Teixeira ◽  
...  
Keyword(s):  
Organic Matter Content ◽  
Gonadal Development ◽  
Matter Content ◽  
Commercial Fishing ◽  
Northern Coast ◽  
Swimming Crab ◽  
Adult Males ◽  
Fishing Boat ◽  
Reproductive Females ◽  
Larval Dispersion

ABSTRACT This study describes the reproductive and recruitment patterns of the swimming crab Achelous spinimanus (Latreille, 1819) in the Ubatuba region of the northern coast of São Paulo, Brazil. Crabs were captured monthly from January 1998 to December 1999 in 18 sites located in three bays (Ubatumirim, Ubatuba, and Mar Virado), using a commercial fishing boat. In each sampling area, bottom temperature, salinity, and organic matter content were recorded. A total of 1,911 individuals were captured: 350 adult males, 475 non-ovigerous adult females, 584 adult ovigerous females, and 502 immature individuals. Reproductive females were more abundant in deeper areas; this migration might be a strategy to improve larval dispersion and survival. Ovigerous females were found year-round, indicating a continuous reproduction, and their abundance was positively correlated with temperature. During the 2-year survey, crabs with all gonadal development stages were found. We can infer that this region provides suitable resources for the development of A. spinimanus.

Reproductive period and recruitment of Penaeoidea shrimp on the southeastern Brazilian coast: implications for the closed season

Crustaceana ◽  
2017 ◽  
Vol 90 (7-10) ◽  
pp. 1177-1192 ◽  
Author(s):  
Sabrina M. Simões ◽  
Gisele S. Heckler ◽  
Rogerio C. Costa
Keyword(s):  
Sustainable Use ◽  
Reproductive Period ◽  
White Shrimp ◽  
Brazilian Coast ◽  
Adult Males ◽  
Reproductive Condition ◽  
Farfantepenaeus Paulensis ◽  
Xiphopenaeus Kroyeri ◽  
Reproductive Females ◽  
Closed Season

The aim of this study was to assess whether all Penaeoidea shrimps captured by trawling are protected by the current closed season. We investigated the reproductive period and juvenile recruitment of Penaeoidea shrimp species captured in the bay-estuary complex of Santos and São Vicente from May 2008 to April 2010. Samples were collected monthly using a shrimp boat at four sites in the estuary and four sites in the bay; environmental factors were monitored. The reproductive condition of females was determined by macroscopic observation of gonads. Juvenile and adult males were classified by observing the endopod forming the petasma; the reproductive condition was determined by the presence of spermatophore in the terminal ampoule. A dendrogram showed little similarity in the reproductive periods of the species sampled in this study. The greatest similarity in the recruitment period was in the white shrimp, Litopenaeus schmitti, and the pink shrimps Farfantepenaeus paulensis and F. brasiliensis, species that are protected by the current closed season. Pink shrimps are not fully protected, however, as they are captured indiscriminately in the estuary, to be used as fishing bait. Considering the number of individuals of reproductive females and juveniles, Xiphopenaeus kroyeri was the most abundant in the marine environment, and L. schmitti, F. paulensis and F. brasiliensis were the most abundant in the estuarine environment. The adequacy of the closed season is discussed, including issues such as the implementation of projects focusing on fishermen and the sustainable use of bait; the closure of fishing from October to December in coastal areas with depths below 20 m, and the application of a regional closed season instead of the current law applied in several states.

scholarly journals Relative growth, sexual maturity, and breeding season of three species of the genus Persephona (Decapoda: Brachyura: Leucosiidae): a comparative study

2013 ◽  
Vol 93 (6) ◽  
pp. 1581-1591 ◽  
Author(s):  
Ariádine Cristine Almeida ◽  
Célia Mary Hiyodo ◽  
Valter José Cobo ◽  
Giovana Bertini ◽  
Vivian Fransozo ◽  
...  
Keyword(s):  
Growth Rates ◽  
Sexual Maturity ◽  
Carapace Width ◽  
Sampling Period ◽  
The Body ◽  
Otter Trawl ◽  
Brazilian Coast ◽  
Fishing Boat ◽  
Reproduction Pattern ◽  
Breeding Seasons

The relative growths of Persephona lichtensteinii, P. mediterranea, and P. punctata were investigated on the south-eastern Brazilian coast, focusing on differences in the growth rates between immature and mature phases, the onset of morphological sexual maturity, and the breeding seasons of these species. Crabs were collected every two months from January 1991 through to November 1992, from a shrimp fishing boat equipped with two otter-trawl nets. Significant differences in the patterns of body growth were observed between immature and mature phases of all three species. Changes in the growth rates of the chelipeds (males) and abdomen (females) observed for P. lichtensteinii, P. mediterranea, and P. punctata, seem to be related to the puberty moult for both sexes. Males of P. mediterranea and P. punctata reached larger mean sizes of carapace width than females, whereas no difference was recorded for P. lichtensteinii. The body size at which 50% of males attained sexual maturity was also larger in P. mediterranea and P. punctata, and smaller in P. lichtensteinii. The absence of a pronounced sexual dimorphism and the size at the onset of sexual maturity observed only for P. lichtensteinii might be explained by distinct reproductive strategies of males. The presence of ovigerous females during the entire sampling period suggests that all three species have a continuous reproduction pattern at the Ubatuba region. Future studies on the population structure, functional maturity, and mating system should improve the understanding of factors driving the biology and ecology of these species at a subtropical region.

scholarly journals The influence of population structure and reproductive aspects of the genus Stellifer (Oken, 1817) on the abundance of species on the southern Brazilian coast

2011 ◽  
Vol 71 (4) ◽  
pp. 991-1002 ◽  
Author(s):  
JL. Rodrigues-Filho ◽  
JR. Verani ◽  
AC. Peret ◽  
LM. Sabinson ◽  
JO. Branco
Keyword(s):  
Activity Index ◽  
Gonadosomatic Index ◽  
Reproductive Activity ◽  
Reproductive Period ◽  
Brazilian Coast ◽  
Effective Population ◽  
Chi Square ◽  
Chi Square Test ◽  
First Maturity ◽  
The Relationship

The differences between abundance and the relationship with aspects of population and reproductive Stellifer rastrifer, Stellifer stellifer and Stellifer brasiliensis were analysed. Data were collected monthly trawl directed for capture of seabob shrimp in Armação do Itapocoroy, an important fishing area on the southern Brazilian coast. The chi-square test showed that the population of S. rastrifer presented values of capture significantly higher than others in all evaluated periods. The frequency distribution of total length curves combined with records of the size at first maturity (L50) showed that S. rastrifer is a species with a majority of the adults effectively participating in the reproductive period. The frequency of occurrence of individuals in reproduction monthly examined together with changes in the gonadosomatic index (GSI) and the reproductive activity index indicated that spring was the main breeding season for the three species. However, it was observed that the reproductive period of S. rastrifer was more pronounced and more extensive than that of its congeners, apparently providing it with ecological advantages and enabling a more effective population balance given the pressure exerted by fishing in the study area.

Cellular development of the germinal epithelium during the female and male gametogenesis of Chaetodon striatus (Perciformes: Chaetodontidae)

Zygote ◽  
2020 ◽  
Vol 28 (4) ◽  
pp. 291-299
Author(s):  
Isabelle Leite Bayona Perez ◽  
Talita Sarah Mazzoni ◽  
Irani Quagio-Grassiotto
Keyword(s):  
Reproductive Activity ◽  
Gonadal Development ◽  
Reproductive Period ◽  
Morphological Data ◽  
Germinal Epithelium ◽  
Cellular Dynamics ◽  
Spawning Period ◽  
Reproductive Life ◽  
Early Primary ◽  
Reproductive Phases

SummaryButterflyfish Chaetodon striatus is highly sought after in the marine ornamental aquarium, although studies about its reproductive biology are scarce. Therefore, to contribute to a better understanding of the reproductive aspects of C. striatus, we describe in detail with the use of high resolution histology the cellular dynamics of the germinal epithelium during the reproductive life history of this species. Based on the activity of the germinal epithelium, this study describes different stages of the gonadal development, similar to the reproductive phases found in other fish, to determine the reproductive period of C. striatus. In characterization of gonadal development, the following germ cells are described for males: spermatogonia, spermatocytes, spermatids and spermatozoa. Oogonia, early, primary, secondary, full-grown and maturing oocytes are described for females. Female germinal epithelium of C. striatus showed substantial changes over the study period, indicating that there was an active spawning period. Male germinal epithelium also presented relevant alterations, indicating reproductive activity in the testicular lobules. Morphological data confirm how informative was the cellular dynamics of the germinal epithelium for understanding gonadal development during adult reproductive life of fish in general. Although Chaetodon are a popular species, previous studies have only produced superficial and rough histological analyses. Therefore, this study demonstrates important information on germinal epithelium of Chaetodon. This knowledge could be a fundamental tool for development of new strategies for breeding of several species in captivity, especially butterflyfishes.

Redescription of Orthopristis ruber and Orthopristis scapularis (Haemulidae: Perciformes), with a hybridization zone off the Atlantic coast of South America

Zootaxa ◽  
2019 ◽  
Vol 4576 (1) ◽  
pp. 109 ◽  
Author(s):  
ALEXANDRE PIRES MARCENIUK ◽  
RODRIGO ANTUNES CAIRES ◽  
LEONARDO MACHADO ◽  
NAJILA NOLIE CATARINE DANTAS CERQUEIRA ◽  
RAYLA ROBERTA M. DE S. SERRA ◽  
...  
Keyword(s):  
South America ◽  
Nuclear Dna ◽  
Atlantic Coast ◽  
Morphological Characteristics ◽  
Distinct Species ◽  
Valid Species ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Western Atlantic ◽  
Coloration Patterns

The genus Orthopristis includes seven valid species, three from the western Atlantic and five from eastern Pacific, while the available identification guides and taxonomic keys incorrectly recognize Orthopristis ruber as the only valid species found on the Atlantic coast of South America. Efforts to expand the inventory of fish species from the northern coast of Brazil led to the identification of two distinct species of Orthopristis from Atlantic South America, based on the analysis of coloration patterns and meristic data, as well as DNA. In the present study, the limits of Orthopristis ruber are reviewed, while Orthopristis scapularis is recognized as a valid species for the northern and northeastern coasts of South America. Based on intermediate morphological characteristics and nuclear DNA markers, a hybrid zone was identified off the state of Espírito Santo, on the eastern Brazilian coast. Additionally, considerations are made on the diversity and biogeography of the coastal marine and estuarine fishes found on the Brazilian coast. 

scholarly journals Population biology of the crab Armases angustipes (Crustacea, Decapoda, Sesarmidae) at Brazilian tropical coast

2014 ◽  
Vol 104 (2) ◽  
pp. 150-161 ◽  
Author(s):  
Marina de Sá Leitão C. de Araújo ◽  
Deusinete de O. Tenório ◽  
Daniela da S. Castiglioni
Keyword(s):  
Population Structure ◽  
Sexual Dimorphism ◽  
Sex Ratio ◽  
Population Biology ◽  
Carapace Width ◽  
Reproductive Activity ◽  
Coastal Regions ◽  
Phytoplankton Productivity ◽  
Number Of Individuals ◽  
Tropical Coast

The semi terrestrial crabs are important elements of the fauna of coastal regions. The aim of this study was to analyze the population structure of Armases angustipes (Dana, 1852) at estuaries of the Ariquindá River, considered a non impacted area, and Mamucabas River, considered a few impacted area, on the south coast of state of Pernambuco, Brazil. The species occurred in all months of the year. The number of individuals per month varied, being higher in the months of transition between the seasons. This is probably due to significant seasonal variations of air and burrow temperature and burrow salinity. There was no sexual dimorphism in size of A. angustipes in the mangrove of Ariquindá River, but males were larger than females in the mangrove of Mamucabas River. In both estuaries, the sex ratio did not differ from Mendelian proportion, but showed a deviation for females. The analysis of temporal variation in sex ratio showed significant differences in some months of the year. These variations are due to cyclical events that act distinctly on each sex. In both estuaries, size classes of carapace width were equally represented by both sexes. The ovigerous females of A. angustipes occurred only in some months of the year, especially in summer, in both estuaries. Probably the high phytoplankton productivity observed in summer favors the reproductive activity, since these algae serve as food for the larvae. Specimens of the population of Rio Ariquindá are largest and wider than those of Mamucabas River. This fact, associated with the low abundance of crabs and the lower frequency of ovigerous females observed in Mamucabas River, is an indication that this population may be influenced by the environmental impacts that this estuary has received.

scholarly journals Preliminary results of drift-bottle releases and recoveries in the Western Tropical Atlantic

1967 ◽  
Vol 16 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Ellen F. Luedemann
Keyword(s):  
Surface Current ◽  
Northeastern Brazil ◽  
Brazilian Coast ◽  
Northern Coast ◽  
The North ◽  
Strong Current ◽  
North Brazil ◽  
Equatorial Current ◽  
The Caribbean ◽  
Area North

In February-March 1963, during the Equalant Operation for the ICITA program, 476 drift-bottles were released at the equatorial waters off the northern Brazilian coast (01ºS to 09ºN and 043ºW to 053ºW). Thirty-five, bottles were recovered (7,4%). Those were classed in five groups according to their different velocity ranges and areas of recovery (Trinidad Island; Lesser Antilles; Caribbean and Florida area; north Brazil; northeastern Brazil). The recoveries of bottles released within 300 nm off the northern and northeastern coast of Brazil confirmed a strong current along the north and northeast coast in northwestern direction (South Equatorial Current and branches). In late February-early March the bottles showed maximum velocities of this current (3,6 knots). The region off the northern coast of Brazil, between 05ºN and 09ºN up to 050ºW seems to have been under the influence of an eastward component of the surface current in this same period, while at late March this influence appears to have been weaker. In the region from Trinidad Island to Yucatan Peninsula the current seems to be stronger on the northeastern side of the Caribbean Sea.

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