scholarly journals Reproductive aspects of Macrobrachium amazonicum (Decapoda: Palaemonidae) in the State of Amapá, Amazon River mouth

2014 ◽  
Vol 44 (2) ◽  
pp. 245-254 ◽  
Author(s):  
Jô de Farias Lima ◽  
Luis Mauricio Abdon da Silva ◽  
Thibério Carvalho da Silva ◽  
Jamile da Silva Garcia ◽  
Ilana da Silva Pereira ◽  
...  
Keyword(s):  
Reproductive Output ◽  
River Mouth ◽  
Northeastern Brazil ◽  
Amazon River ◽  
Female Size ◽  
Peak Period ◽  
Macrobrachium Amazonicum ◽  
General Aspects ◽  
First Maturity ◽  
Size At First Maturity

Macrobrachium amazonicum is an indigenous prawn vastly distributed in basins of South America, widely exploited by artisanal fisheries in northern and northeastern Brazil and, with great potential for aquaculture. This study aimed to investigate general aspects of population structure and reproductive characteristics (size at first maturity, fecundity and reproductive output) of M. amazonicum from two important areas to artisanal prawn fishing located at the mouth of the Amazon River, State of Amapá. The specimens were captured using 20 handcrafted traps called "matapi". A number of 5,179 prawns were captured, 2,975 females and 2,195 males resulting in 1.35:1 female to male ratio. Santana Island and Mazagão Velho showed females predominated in the population. A reproductive peak period was observed from January to April/2009 and in December/2010, coinciding with the period of higher rainfall. The recruitment peak occurred in June and July/2009. Egg-bearing females ranged in size (carapace length) from 11.10 to 29.6 mm. Fecundity increased with female size and reached up to 7,417 eggs. This amount of eggs is considered low if compared with other Macrobrachium estuarine species. Mean egg volume increased gradually from 0.121 to 0.24 mm³ during embryogenesis, representing 68.5% of overall increase from Stage I to Stage III. Eggs of M. amazonicum are small; this is typical for Macrobrachium species, which depends on brackish water to complete the larval development. Irrespective of female size, reproductive output of M. amazonicum varied between 4.8 and 21.85% of their body weight into eggs production.

scholarly journals Reproductive biology of Macrobrachium surinamicum (Decapoda: Palaemonidae) in the Amazon River mouth

2015 ◽  
Vol 45 (3) ◽  
pp. 299-306 ◽  
Author(s):  
Jô de Farias LIMA ◽  
Mayara Cristina Moura DA CRUZ ◽  
Luis Mauricio Abdon da SILVA
Keyword(s):  
Reproductive Biology ◽  
Egg Production ◽  
Reproductive Output ◽  
River Mouth ◽  
Reproductive Period ◽  
Amazon River ◽  
Female Size ◽  
Peak Period ◽  
Orinoco Delta ◽  
First Maturity

Macrobrachium surinamicum is an indigenous prawn distributed from the lower Amazon and Tocantins river basins to Venezuela in the Orinoco Delta region. It is common bycatch fauna of Macrobrachium amazonicum artisan fishing in the states of Pará and Amapá. The aim of this study was to investigate aspects on reproductive biology (reproductive period, size of sexual maturity population, fecundity, reproductive output and recruitment) of M. surinamicum from four important areas to artisanal prawn fishing located at the Amazon River mouth (Amapá and Pará). The specimens were captured using 20 handcrafted traps called "matapi". A number of 675 prawns were captured, 258 males, 409 females and eight juveniles, resulting in 1:1.6 (Male: Female) sex ratio. The reproductive peak period occurred from March to July, coinciding with the higher rainfall period. The juvenile prawn occurred only in May and July. Total length of egg-bearing females ranged from 12.12 to 38.30 mm, with mean female length at first maturity (L50) of 23.7 mm. Fecundity increased with prawn size and varied between 174 and 1780 eggs per female. Mean egg volume increased gradually from 0.031 (Stage I) to 0.060 mm³ (Stage III) during embryogenesis. Macrobrachium surinamicum depends on brackish water to complete the larval development. Irrespective of female size, reproductive output of M. surinamicum varied between 4.3 % and 35.5 % of their body weight for egg production. The knowledge of the reproductive biology reported in the present study is an important tool to define strategies to preserve M. surinamicum in Amazon River mouth.

Reproductive traits of deep-sea armoured shrimp, Glyphocrangon investigatoris from Bay of Bengal, Indian Ocean

2017 ◽  
Vol 99 (1) ◽  
pp. 93-100
Author(s):  
Diana Benjamin ◽  
M. Harikrishnan ◽  
Jenson Victor Rozario ◽  
Deepak Jose ◽  
B. Madhusoodana Kurup ◽  
...  
Keyword(s):  
Deep Sea ◽  
Carapace Length ◽  
Reproductive Output ◽  
Reproductive Investment ◽  
Dry Weight ◽  
Brood Chamber ◽  
Chamber Volume ◽  
Embryo Number ◽  
First Maturity ◽  
Size At First Maturity

Details on size at first maturity, embryo number and size, brood chamber volume and reproductive output of deep-sea armoured shrimp, Glyphocrangon investigatoris caught off the south-east coast of India by using EXPO trawl from 633 m depth in FORV ‘Sagar Sampada’ are reported here. Eighty-four female shrimps ranging from 17.29–36.31 mm carapace length and 2.28–16.54 g weight formed 7.73% of total catch, 30% of which was constituted by embryo-bearing females. Regression of weight on carapace length revealed negatively allometric growth (r2 = 0.85, P < 0.01). The size at first maturity was estimated as 19.96 mm. The embryo number ranged from 55 to 233 with a mean of 120.24 ± 34 embryos and showed a positive correlation to body size. Embryo diameter varied between 1.0 to 3.34 mm and more than 50% of embryos constituted the 2.0–2.5 mm size class. Brood chamber volume and percentage frequency of embryo stage development revealed a linear relationship with carapace length. Based on dry weight, mean reproductive output was estimated to be 0.16. The female armoured shrimps showed a high reproductive investment evidenced from few, large, yolky embryos, indicating their deep-sea adaptation.

scholarly journals REPRODUCTION ASPECTS OF COBIA CAUGHT IN PERNAMBUCO COAST, NORTHEASTERN BRAZIL

2021 ◽  
Vol 47 ◽  
Author(s):  
Santiago HAMILTON ◽  
Ernesto Carvalho DOMINGUES ◽  
Ronaldo Barradas PEREGRINO JÚNIOR ◽  
Mariana Gomes do RÊGO ◽  
Fabio Hissa Vieira HAZIN ◽  
...  
Keyword(s):  
Body Weight ◽  
Standard Deviation ◽  
Bayesian Analysis ◽  
Histological Analysis ◽  
Fork Length ◽  
Northeastern Brazil ◽  
Batch Fecundity ◽  
Rachycentron Canadum ◽  
First Maturity ◽  
Size At First Maturity

Aspects of the reproduction of cobia (Rachycentron canadum) population from the coast of Pernambuco State, Northeastern Brazil, were studied from February 2004 to August 2006. One hundred eleven individuals were analyzed: 54 females with fork length (FL) ranging from 40 to 137 cm (mean ± standard deviation: 90.7 ± 18.1 cm) and 57 males with FL from 43 to 114.5 cm (82.4 ± 17.0 cm). Histological analysis was used to identify maturational phases. Spawning capable females were found from August to May, except in December, while mature males were present throughout the year, except in July. Size at first maturity (L50) obtained by Bayesian analysis was 72.51 cm FL for females and 60.69 cm FL for males. Overall batch fecundity ranged from 192,063 to 1,600,513 oocytes (722,398 ± 430,911) and mean relative batch fecundity ranged from 32.9 to 104.8 (71.1 ± 29.8) oocytes per gram of female body weight. The data indicate that the reproduction of cobia off the coast of Pernambuco occurs throughout the year, but with peaks between February and April, period in which gonadosomatic indices reach the maximum values and then decrease until May for females and males.

Effects of hydroponic supplementation on Amazon river prawn (Macrobrachium amazonicum Heller, 1862) and lettuce seedling (Lactuca sativa L.) development in aquaponic system

Aquaculture ◽  
2021 ◽  
pp. 736916
Author(s):  
Fábio Carneiro Sterzelecki ◽  
Gabriel Rodrigues Santos ◽  
Mônica Trindade Abreu de Gusmão ◽  
Thayane Cristine Caetano de Carvalho ◽  
Alex Ribeiro dos Reis ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
Amazon River ◽  
Lettuce Seedling ◽  
Lactuca Sativa L ◽  
Macrobrachium Amazonicum

Aspects of the fishery, maturation and net selectivity of the wedge sole (Dicologoglossa cuneata) off south-western Iberia: implications for fishery management

2009 ◽  
Vol 90 (7) ◽  
pp. 1465-1474 ◽  
Author(s):  
Miguel Neves Santos ◽  
Pedro Gil Lino
Keyword(s):  
Fishery Management ◽  
River Mouth ◽  
Mesh Size ◽  
Scientific Basis ◽  
Catch Per Unit Effort ◽  
Important Species ◽  
Gill Net ◽  
Catch Rates ◽  
Log Normal ◽  
First Maturity

The wedge sole (Dicologoglossa cuneata, Moreau 1881) is a commercially important species for the artisanal fleet operating off the south-western Iberian Peninsula. During 2004 and 2005 a study was undertaken aiming to provide a scientific basis for management. Data collection included information on aspects of the fishery, spawning season, size at first maturity, tangle and gill-net selectivity. Seven nominal mesh sizes were used (40, 45 and 50 mm tangle nets and 40, 50, 60 and 70 mm gill-nets). Spawning lasts from December to June, with peaks in March and May. Length at first maturity for females was estimated at 18.5 cm. Catch rates decreased sharply with increasing mesh size, with tangle nets providing the highest yields. The log-normal selectivity model provided the best fit for specimens that were wedged. The higher catch-per-unit-effort of the smaller mesh sizes and the modal length of the fitted selectivity curve being below the size-at-maturity for wedge sole, suggests that the 50 mm nominal mesh size tangle net is the most appropriate for ensuring the fishery sustainability. Nevertheless, the minimum legal size should increase to at least 18 cm and a time–area closure should be implemented off the Guadiana River mouth.

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