Época reprodutiva de Mugil platanus (Günther, 1880), Pisces Mugilidae da Baia de Paranaguá (Paraná, Brasil)

2001 ◽  
Vol 30 ◽  
Author(s):  
MARIA DE LOURDES PEREIRA ESPER ◽  
MÁRCIA SANTOS DE MENEZES ◽  
WALMIR ESPER
Keyword(s):  
Spawning Season ◽  
Paranaguá Bay

A análise conjunta dos resultados de 311 exemplares de Mugil platanus capturados em diversos pontos da baía de Paranaguá indicou que na região a espécie apresenta um período reprodutivo entre maio e outubro, com picos em agosto e setembro, ocorrendo desova no período que compreende os meses de setembro, outubro e novembro. O IGS (índice gonadossomático), pôde ser utilizado como medida quantitativa do estádio de desenvolvimento gonadal. Provavelmente, as fêmeas maduras do início do período reprodutivo estejam de passagem pela área, desovando em outro local. ABSTRACT Analysis of 311 captured individuals of Mugil platanus from different points of the Paranaguá bay suggested that the species has a long spawning season (from between May and October) in this region. The spawn occurred between September and November, as IGS has indicated. Probably, ripe females from the beginning of the spawning season would be passing along this area to spawn in another place. RÉSUMÉ L’analise conjointe des résultats des 311 exemplaires de Mugil platanus capturés en plusieurs points du baie du Paranaguá, indique que dans la région l’espèce présente une période reproductive entre mai et octobre, surtout en aout et septembre.Des frais ont lieu dans la période comprise entre les mois de septembre, octobre et novembre.L’indicegonadossomatique peut être utilisé comme mesure quantitatif de l’estade de maturation gonatique. Probablement, les femelles mûris du début de le période reproductive sont de passage dans la region en frayant dans un autre lieu.

scholarly journals Morphometric Relationship, Growth, and Condition Factor of Flyingfish, Hirundicththys oxycephalus during spawning season

2017 ◽  
Vol 89 ◽  
pp. 012001 ◽  
Author(s):  
Friesland Tuapetel ◽  
Natsir Nessa ◽  
Syamsu Alam Ali ◽  
Sudirman ◽  
B.G. Hutubessy ◽  
...  
Keyword(s):  
Condition Factor ◽  
Spawning Season

Size–Maturity Relationships and Related Observations in Newfoundland Populations of the Lobster (Homarus americanus)

1980 ◽  
Vol 37 (6) ◽  
pp. 945-956 ◽  
Author(s):  
G. P. Ennis
Keyword(s):  
Carapace Length ◽  
Size Range ◽  
Sex Ratios ◽  
Weight Ratio ◽  
Homarus Americanus ◽  
Spawning Season ◽  
Length Ratio ◽  
Maturity Indices

Female maturity ogives for five Newfoundland populations of the lobster (Homarus americanus) gave 50% maturities ranging from 71- to 76-mm carapace length. Sizes at which distinct inflections (indicating onset of maturity) and asymptotes (indicating 100% mature) are present in the abdomen width/carapace length ratio vs. carapace length relationships coincide with the smallest ovigerous and largest immature specimens, respectively, observed in those particular samples. Inflection in the crusher claw weight/whole weight ratio vs. carapace length relationships (used in this paper to indicate onset of maturity in males) occurred at larger sizes than inflections in the abdomen width/carapace length ratios of females.The percentage of nonovigerous females that spawn in a given year generally increases with increasing size. The highest percentage of nonovigerous females tagged with sphyrion tags prior to the spawning season that were ovigerous when recaptured 10–12 mo later was 83.8%. The percentage of ovigerous females with new shells (i.e. molted and spawned in same year) varied between areas and years and ranged from 0 to 38.5% of the total number of ovigerous females in fall samples. The percentage of ovigerous females in samples also varied between areas and years and ranged from 2.6 to 30.4% of the total number of females greater than the size at 50% maturity. In general a greater percentage of females was ovigerous at sizes between the size at 50% maturity and 80 mm (largest subcommercial size) than at commercial sizes.In a sample of nonovigerous females, the size range at which 50% were fertilized (76–80 mm) coincided closely with the size at 50% maturity (75 mm) for the area.At subcommercial sizes (< 81 mm) the sexes were approximately equally represented in fall trap-caught samples but females heavily outnumbered males in diver-caught samples taken over the same period. At commercial sizes, however, males heavily outnumbered females in the trap-caught samples while in diver-caught samples the sexes were equally represented.Key words: lobster (Homarus americanus), maturity ogives, maturity indices, percent ovigerous, sex ratios

Golden Shiner Egg Production during a Spawning Season

2010 ◽  
Vol 72 (3) ◽  
pp. 272-277 ◽  
Author(s):  
Troy Clemment ◽  
Nathan Stone
Keyword(s):  
Egg Production ◽  
Spawning Season ◽  
Golden Shiner

scholarly journals Biomarkers responses in fish (Atherinella brasiliensis) of paranaguá bay, southern Brazil, for assessment of pollutant effects

2013 ◽  
Vol 61 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Ciro Alberto de Oliveira Ribeiro ◽  
Alberto Katsumiti ◽  
Patrícia França ◽  
Jocieli Maschio ◽  
Eliandra Zandoná ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Protected Areas ◽  
Aquatic Organisms ◽  
Southern Brazil ◽  
Paranaguá Bay ◽  
Fuel Oils ◽  
Polycyclic Aromatic ◽  
Biochemical Genetic ◽  
Autumn And Winter ◽  
The Impact

Paranaguá bay is a complex estuary located in southern Brazil containing three protected areas listed by UNESCO. Historically, the estuary has been affected by urban, industrial, agricultural and harbor activities, and occasional accidents. Specifically, the explosion of the Chilean ship Vicuña in December 2004 spilled methanol and crude and fuel oils which affected both protected and non-protected areas. The present study sought to investigate the pollution threat to aquatic organisms in order to evaluate the potential effects of pollutants. One hundred and twenty adult fish Atherinella brasiliensis were collected from different sites within Paranaguá estuary, including the harbor and open ocean, during summer, autumn and winter of 2005. Among the biomarkers, the somatic index, chemical analysis of bile, biochemical, genetic and morphological parameters were considered. Chemical analysis of bile showed a continuous bioavailability of polycyclic aromatic hydrocarbons (PAHs) according to proximity to the harbor site. The histopathological findings have demonstrated aconsiderable incidence of severe pathologies in the liver and gills, corroborated by biochemical disturbances and genetic damage. These findings indicate that more studies are necessary to evaluate both water quality and fish health so as to permit a better analysis of the impact of pollution in Paranaguá estuary.

Patterns of genetic structure of Eurasian perch (Perca fluviatilis L.) in Lake Geneva at the end of the spawning season

2015 ◽  
Vol 41 (3) ◽  
pp. 846-852 ◽  
Author(s):  
Sana Ben Khadher ◽  
Jean-François Agnèse ◽  
Sylvain Milla ◽  
Fabrice Teletchea ◽  
Pascal Fontaine
Keyword(s):  
Genetic Structure ◽  
Perca Fluviatilis ◽  
Spawning Season ◽  
Lake Geneva ◽  
Eurasian Perch ◽  
Perch Perca Fluviatilis

scholarly journals Chromosomal studies of five species of the marine fishes from the Paranaguá Bay and the karyotypic diversity in the marine teleostei of the Brazilian coast

2008 ◽  
Vol 51 (2) ◽  
pp. 303-314 ◽  
Author(s):  
Roger Raupp Cipriano ◽  
Alberto Sérgio Fenocchio ◽  
Roberto Ferreira Artoni ◽  
Wagner Molina ◽  
Rafael Bueno Noleto ◽  
...  
Keyword(s):  
Marine Fishes ◽  
Brazilian Coast ◽  
Paranaguá Bay ◽  
Karyotypic Diversity

In this study, five species of marine fishes from the Paranaguá Bay in the Brazilian coast were evaluated. Eucinostomus argenteus and Diapterus rhombeus (Gerreidae) presented 48 chromosomes, all of which more acrocentric (FN = 48); Strongylura timucu and S. marina (Belonidae) also presented 48 chromosomes, but with a higher karyotypic complexity than the Gerreidae, 10M+2SM+36A (FN = 60) and 4M+44A (FN = 52), respectively. The fifth species, Mugil curema (Mugilidae), different than the others, presented only 28 chromosomes 20M+4ST+4A (FN = 48). The species presented diversity in the karyotypic macro-structure, which should be relevant for the cytotaxonomy and the evolution of this group of the vertebrate.

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