Reproductive Biology of Portunus pelagicus in a South-East Australian Estuary

Johnson, Daniel D.; Gray, Charles A.; Macbeth, William G.

doi:10.1651/08-3076.1

Cited by 37 publications

(43 citation statements)

References 13 publications

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“…The females with vitellogenic ovaries were considered to be mature individuals (ovarian developmental stages III-V; detailed staging information is shown in Table 2). To estimate the size at first maturity, the minimum CW was recorded for the females with the oval-shaped pleonal flap, which indicated that the females had finished the pubertal moult (Johnson et al 2010). The CW at which 50% (CW 50 ) of females were sexually mature was estimated by fitting a logistic regression curve to the percentage of mature P. pelagicus for each size class of 10 mm CW, as described by Johnson et al (2010).…”

Section: Estimation Of Size At Ovarian Maturitymentioning

confidence: 99%

“…The CW at 50% female P. pelagicus maturity in Beibu Gulf (108.2 mm) was close to that of the Moreton Bay population (106 mm), but higher than that of three Western Australian and Indian populations (Table 5). This difference reflects not only inter-regional differences in the reproductive biology of female P. pelagicus but also differences in fishing pressure, sampling gears, sampling locations and seasons, crab density, predation pressure and food availability of natural habitat (Hines 1989, Weng 1992, de Lestang et al 2003b, Smith et al 2004, Johnson et al 2010.…”

Section: Size At Maturity and Size Distributionmentioning

confidence: 99%

“…However, wild P. pelagicus has been overfished, and in the future, the expansion of P. pelagicus output depends on aquaculture and stock enhancement programmes (Maheswarudu et al 2008, Dixon andHooper 2009). Therefore, a better understanding of its reproductive biology would directly benefit the fisheries management as well as artificial propagation of P. pelagicus (Stewart et al 2007, Johnson et al 2010). …”

Section: Introductionmentioning

confidence: 99%

“…Many studies have been conducted on the reproductive biology of female P. pelagicus, including size of sexual maturity (Shields and Wood 1993;Smith et al 2004;Johnson et al 2010), changes of external features of the ovary (gross morphology and colouration) (Sumpton et al 1994), anatomical changes of spermatheca (Bawab and El-sherief 1988), histological changes of ovary (Stewart et al 2007), seasonal fluctuations of gonadosomatic index (GSI) (Pillay andNair 1973, Sumpton et al 1994), temporal changes in the proportion of gravid females (Shields and Wood 1993, Sukumaran and Neelakantan 1998, Kumar et al 2003, fecundity and egg batches (Johnson et al 2010, De Lestang et al 2003a). However, the criteria of ovarian staging of P. pelagicus is inconsistent and unclear among the different publications (Sumpton et al 1994, Stewart et al 2007), making it difficult to apply these ovarian staging criteria for fisheries management aand to compare the results from different research reports (Stewart et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies on the reproductive biology of female P. pelagicus, have reported regional and areaspecific differences in size at sexual maturity, timing and length of female ovarian development, and spawning season (Shields and Wood 1993, Sumpton et al 1994, Smith et al 2004, Xiao and Kumar 2004, Johnson et al 2010. Although the Beibu Gulf population of P. pelagicus supports the largest P. pelagicus fishery (20% of total landings) in China (Wang et al 2001), no available publications could be found on female reproductive biology for the Beibu Gulf population of P. pelagicus.…”

Section: Introductionmentioning

confidence: 99%

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Size distribution and monthly variation of ovarian development for the female blue swimmer crab, <em>Portunus pelagicus</em> in Beibu Gulf, off south China

Liu¹,

Wu²,

Wang³

et al. 2014

Sci. Mar.

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Summary:The present study was conducted to investigate the size distribution and seasonality variation of ovarian development for females of the blue swimmer crab, Portunus pelagicus, from Beibu Gulf, China. The results show that, based on pubertal moult, gonadosomatic index (GSI), morphology and histological configurations, the ovarian development cycle of P. pelagicus can be divided into five stages; Stage I, dominated by oogonia with some previtellogenic oocytes and endogenous vitellogeic oocytes; Stage II, dominated by endogenous vitellogenic oocytes with some previtellogeic oocytes and oogonia; Stage III, dominated by exogenous vitellogeic oocytes; Stage IV, of nearly mature oocytes; and Stage V, of mature oocytes with fully ripened ovary. GSI increased significantly during the ovarian development (P<0.05), while the hepatosomatic index (HSI) appeared to decrease. Thus, a significant negative correlation was found between GSI and HSI (P<0.01). The smallest carapace width of a mature female and that at which 50% of females reach maturity were 79.2 mm and 108.2 mm, respectively. The carapace width and body weight of the dominant size class ranged between 86 and 115 mm and 40 and 120 g, respectively. Furthermore, the highest GSI of female P. pelagicus was found in March, while the peak of ovigerous females was found in April.Keywords: blue swimmer crab; ovarian development; size at maturity; seasonality.Distribución del tamaño y variación mensual del desarrollo ovárico del cangrejo azul hembra, Portunus pelagicus en el golfo de Beibu, frente al sur de China Resumen: Este estudio se realizó para investigar la distribución del tamaño y la estacionalidad de desarrollo ovárico del cangrejo azul hembra, Portunus pelagicus en el golfo de Beibu, China. Los resultados muestran que, sobre la base de la muda de la pubertad, el GSI (índice gonadosomático), la morfología y las configuraciones histológicos y el ciclo del desarrollo ovárico de P. pelagicus puede dividirse en cinco etapas. Etapa I: La fase de oogonia (OG) dominaba con algunos ovocitos previtelogeicos (PR) y ovocitos vitelogeicos endógenos (EN); Etapa II: fase de EN dominaba con algunos PR y OG; Etapa III: la fase de ovocitos vitelogeicos exógenos (EX) era dominante; Etapa IV: fase de ovocitos casi maduros (NO); Etapa V: fase de ovocitos maduros (MO) y maduración completa del ovario. El índice gonadosomático (GSI) aumentó significativamente durante el desarrollo del ovario (P<0.05), mientras que el índice hepatosomático (HSI) parecía disminuir. Por lo tanto, se encontró una correlación negativa significativa entre GSI y HSI (P<0.01). La menor anchura del caparazón (CW) de una hembra madura y CW del 50% de las hembras maduras eran 79.2 mm y 108.2 mm, respectivamente. La CW y el peso corporal de la clase de tamaño dominante oscilaban entre 86-115 mm y 40-120 g respectivamente. Por otra parte, el GSI de la hembra más grande de P. pelagicus se encontró en marzo, mientras que el pico de las hembras ovígeras se produjo en abril en la población del golfo de Beibu .P...

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Section: Estimation Of Size At Ovarian Maturitymentioning

confidence: 99%

Section: Size At Maturity and Size Distributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Size distribution and monthly variation of ovarian development for the female blue swimmer crab, <em>Portunus pelagicus</em> in Beibu Gulf, off south China

Liu¹,

Wu²,

Wang³

et al. 2014

Sci. Mar.

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Abundance and Distribution of Blue Swimmer Crab in Response to Environmental Variation Across Two Contrasting Estuaries

Hanamseth,

Schilling,

Johnson

et al. 2024

Estuaries and Coasts

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Portunid crabs are an iconic, high value species in NSW, but catches are highly variable in space and time. Substantial variation in biomass is observed in both exploited and unfished populations, and environmental effects on distribution and abundance are an important factor contributing to this variability. Predicting and responding to this variability is a challenge for management and sustainability of exploited populations. We examine spatial and temporal variation in Blue Swimmer Crab (Portunus armatus) populations, over a 2.5 year trapping survey in two temperate estuaries that differ in tidal flow and riverine input. Specifically, monthly catch rates and distribution throughout the estuary are examined alongside variation in temperature and conductivity. In Wallis Lake, the shallower estuary with a restricted entrance, both water temperature and conductivity impacted abundance and distribution of crabs but there was no evidence that pulses of freshwater flow had a major impact. For a 10 °C increase in temperature the population on average shifted ~ 700 m closer to the ocean. Males were consistently located slightly further into the estuary compared to females, but there was no convincing evidence of estuarine egression in response to lower salinity. In Port Stephens, the deeper, tidal estuary, water temperature and conductivity also impacted abundance, but while males were more dispersed than females, the distribution of crabs within the estuary did not appear to be influenced by temperature, conductivity or flow. These results highlight the links between nuanced environmental relationships and estuarine geomorphology for Blue Swimmer Crab.

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Relative trap efficiency for recreationally caught eastern Australian blue swimmer crab (Portunus pelagicus) and associated injury and mortality of discards

et al. 2013

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Reproductive Biology of Portunus pelagicus in a South-East Australian Estuary

Cited by 37 publications

References 13 publications

Size distribution and monthly variation of ovarian development for the female blue swimmer crab, <em>Portunus pelagicus</em> in Beibu Gulf, off south China

Size distribution and monthly variation of ovarian development for the female blue swimmer crab, <em>Portunus pelagicus</em> in Beibu Gulf, off south China

Abundance and Distribution of Blue Swimmer Crab in Response to Environmental Variation Across Two Contrasting Estuaries

Relative trap efficiency for recreationally caught eastern Australian blue swimmer crab (Portunus pelagicus) and associated injury and mortality of discards

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