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sex ratio

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Published: 03 April 2017
Figure 6. Distribution of sex ratio by month. More
Image
Published: 03 April 2017
Figure 7. Distribution of sex ratio by size. More
Image
Published: 01 July 2012
Figure 2. Temporal variation of sex ratios of A. indicus in the coastal waters of Malacca, Malaysia. The dotted line indicates a ratio of 1:1 (female:male). More
Journal Article
Aquatic Ecosystem Health & Management (2012) 15 (3): 322–332.
Published: 01 July 2012
...T. C. Pratt; S. C. Chong The diversity and abundance of ciscoes has declined in the Great Lakes, with only Lake Superior retaining its original Cisco fauna; yet as a group, ciscoes remain poorly studied. We examined age and growth, sex ratios, and estimated survivorship and mortality of deepwater...
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Journal Article
Aquatic Ecosystem Health & Management (2016) 19 (1): 83–91.
Published: 02 January 2016
...G. P. Amarasekara; T. Priyadarshana; J. Manatunge; N. Tanaka; G. L. Gunaratne This study was conducted to determine the present status of the Mud Crab ( Scylla serrata Forskal) population in Koggala Lagoon, including details on size at maturity, sex ratio and carapace width - body weight...
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Journal Article
Aquatic Ecosystem Health & Management (2021) 24 (2): 52–63.
Published: 01 April 2021
... that the invasion has moderately impacted the indigenous fish diversity. Landing of Indian Major Carp (IMC) indicated severe decline (76.4 - 95.6%) in comparison to the catch data recorded earlier from Buxar. Data generated on sex structure of Common Carp indicated that the overall sex ratio showed positive...
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Journal Article
Aquatic Ecosystem Health & Management (2012) 15 (3): 311–315.
Published: 01 July 2012
.... setosum was estimated as 59.66 mm and the mean weight was 101.68 g. Among the 101 specimens, 52 were males and 49 were females, indicating a sex ratio of male to female of 1:0.94. The logarithmic form of length-weight relationship of D. setosum was Log W = −1.3977 + 1.9049*Log TL, while the exponential...
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Journal Article
Aquatic Ecosystem Health & Management (1999) 2 (3): 311–317.
Published: 01 January 1999
... salmon fed diets contaminated with nonylphenol showed no differences in sex ratios compared with the control group. A significantly increased liver somatic index was detected for groups exposed to diets contaminated with 15 and 30 mg 17β-estradiol, 300 mg nonylphenol or 1500 mg di-2-ethylhexyl phthalate...
Journal Article
Aquatic Ecosystem Health & Management (2005) 8 (3): 303–312.
Published: 01 July 2005
..., as background information for the effects portion of this study. As a result, we described a total of 31 newly recorded crane fly species in the middle reaches of the River Shinano. In all three years of study, the sex ratio for all taxa combined was 74.8 to 75.5 percent males. Antocha was the dominant taxon...
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Journal Article
Aquatic Ecosystem Health & Management (2017) 20 (1-2): 130–139.
Published: 03 April 2017
...Figure 6. Distribution of sex ratio by month. ...
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Journal Article
Aquatic Ecosystem Health & Management (2010) 13 (2): 214–221.
Published: 28 May 2010
.... Barbus amphigramma spawns all year round, but with discernible peaks in March, July and October. The peaks in March and October correspond with the beginning of the long and short rains, respectively, in Kenya. Copyright © AEHMS 2010 breeding patterns gonadosomatic index sex ratio fecundity...
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Journal Article
Aquatic Ecosystem Health & Management (2001) 4 (3): 275–282.
Published: 01 September 2001
..., 1994), while the zebrafish spawns every second to fifth day depending on nutrition, temperature, the number of fish in the aquarium, the age of the fish, and sex ratio (Lambert and van Oordt, 1973; Eaton and Farley, 1974; Bresch, 1986; Goolish et al, 1998). The present investigation was performed...
Journal Article
Aquatic Ecosystem Health & Management (2012) 15 (3): 294–302.
Published: 01 July 2012
...Figure 2. Temporal variation of sex ratios of A. indicus in the coastal waters of Malacca, Malaysia. The dotted line indicates a ratio of 1:1 (female:male). ...
FIGURES | View All (4)
Journal Article
Aquatic Ecosystem Health & Management (2016) 19 (2): 181–191.
Published: 02 April 2016
... the conditions of parametric statistics. When these conditions could not be met, a Mann-Whitney U non-parametric two sample rank test was employed (Zar, 1984 ). Student-Newman-Keuls multiple comparison test (Zar, 1984 ) was performed to detect differences. Sex ratios were compared using chi-squared analysis...
FIGURES
Journal Article
Aquatic Ecosystem Health & Management (2007) 10 (4): 443–448.
Published: 28 November 2007
... statistically using student t–test ( Zar, 1999 ). The sex ratio, expressed as number of male to female was analysed by 5 cm length class and deviation from 1:1 ratio statistically tested by Chi–square test ( χ 2 ). Figure 1. Map showing the study area, Nyanza Gulf of Lake Victoria, Kenya. Size...
FIGURES
Journal Article
Aquatic Ecosystem Health & Management (2017) 20 (1-2): 188–197.
Published: 03 April 2017
...' households provided the information about overall characteristics of the riverine fisher community in India. The parameters under investigation were age, gender, family size, family composition and sex ratio. Age is an important factor in determining the socioeconomic status of a community...
FIGURES
Journal Article
Aquatic Ecosystem Health & Management (2005) 8 (2): 175–184.
Published: 01 April 2005
... studies of embryonic mortalities and malformations ( Jacobsson and Neuman, 1991 ; Vetemaa et al., 1997 ), sex ratios of embryos ( Larsson and Förlin, 2002 ), aspects of metabolism during pregnancy ( Korsgaard, 1994 ), induction of hepatic detoxification enzyme activities ( Förlin and Celander, 1993...
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Journal Article
Aquatic Ecosystem Health & Management (2013) 16 (3): 322–328.
Published: 01 July 2013
...). In the combined data for both mesh sizes, the fecundity of non-infected fish increased strongly (R 2 = 0.515; N = 568; p < 0.01) with increasing fish length unlike the infected R. argentea in which the correlation of fecundity with fish size was weaker (R 2 = 0.368; N = 171; p < 0.01). Sex ratio of R...
FIGURES
Journal Article
Aquatic Ecosystem Health & Management (2013) 16 (4): 465–472.
Published: 01 October 2013
... higher proportion of minors (55%) than adults (45%). The sex ratio across the age groups varied from 656 to 1053 females per 1000 males in the age groups 15–29 and <5 years, respectively. The lower ratio was primarily due to gender bias, poor health care and social attention for the females. Higher...
Includes: Supplementary data
Journal Article
Aquatic Ecosystem Health & Management (2007) 10 (4): 407–415.
Published: 28 November 2007
... in Lake Victoria was estimated at about 5,276.5 tonnes, or about 18.19% of the total fish biomass in the lake. About 30% of the biomass of R. argentea (1,462 t) should be sexually mature. At a sex ratio of 1:1, egg production can be estimated at about 1,260 tonnes. At 12.5 million eggs kg −1 , we expect...
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