Reproductive Dynamics

Павлов, Д. А.; Emel’yanova, N. G.

doi:10.1002/9781118752739.ch2

Cited by 8 publications

(4 citation statements)

References 122 publications

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“…Hermaphroditism in freshwater fishes has been traditionally considered to be absent (Wootton and Smith 2014) or rare (Sadovy de Mitcheson and Liu 2008;Pavlov et al 2009). In our study we attempt to provide the first explicit assessment of the number of hermaphrodite fish species present in freshwater.…”

Section: Hermaphroditism In Freshwater Fishesmentioning

confidence: 99%

“…Functional hermaphroditism has traditionally been considered either absent or very rare in freshwater habitats (Sadovy de Mitcheson and Liu 2008;Pavlov et al 2009;Wootton and Smith 2014;Kuwamura et al 2020). The number of hermaphroditic species in freshwater was calculated to represent only * 3% of the total number of hermaphroditic species, in clear contrast with the fact that freshwater fish species account for about half the number of all fish species (Kuwamura et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…The underlying cause is unknown but explanations for this phenomenon have relied on morphological aspects such as egg size. Thus, compared to marine fish, freshwater fish tend to spawn fewer and larger demersal eggs and larvae (Freedman and Noakes 2002;Pavlov et al 2009). It has been argued that anatomical differences in the reproductive ducts may accentuate the physical differences in male and female anatomy, forming a sort of barrier for the development of hermaphroditism (Warner 1978;Sadovy de Mitcheson and Liu 2008).…”

Section: Introductionmentioning

confidence: 99%

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Hermaphroditism in fish: incidence, distribution and associations with abiotic environmental factors

Pla

Maynou

Piferrer

2021

Rev Fish Biol Fisheries

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The distribution of hermaphroditism in fishes has traditionally been mainly explained by its dependence on biotic factors. However, correlates with major abiotic factors have not been investigated on a quantitative basis and at a global scale. Here, we determined the incidence of hermaphroditism in fish at the family and species level, tested the hypothesis that evolutionary relationships account for the poor presence of hermaphroditism in freshwater species, and tested the association of sexual systems with latitude, habitat type and depth. Functional hermaphroditism is reported in 8 orders, 34 families and 370 species of fishes, all teleosts. Sequential hermaphroditism predominates over simultaneous hermaphroditism at a ratio ~ 5:1 and protogyny (female-to-male sex change) predominates ~ 6:1 over protandry (male-to-female). We found 12 hermaphroditic species that can live in freshwater. However, seven of these species are from four primarily marine families while there are only five species from two mostly freshwater families. Protogynous and bi-directional sex changers have a tighter association with reef-associated tropical and subtropical habitats when compared to protandrous species, which tend to be more plastic in terms of distribution requirements. Finally, simultaneous hermaphrodite species live both in the deep sea and shallow waters in similar proportions. This study can be the basis for further research in specific groups for different purposes, including ecological and evolutionary issues as well as conservation and management of exploited species. Understanding the environmental correlates can help to forecast changes in the distribution or phenology of hermaphrodites in a global change scenario.

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Section: Hermaphroditism In Freshwater Fishesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hermaphroditism in fish: incidence, distribution and associations with abiotic environmental factors

Pla

Maynou

Piferrer

2021

Rev Fish Biol Fisheries

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“…Histological sections were cut at 5-8 µm from each block using a tissue microtome, mounted on glass microscope slides and stained with Harris"s haematoxylin and eosin counterstain. Each histological section was scored by estimating the percentage that each of the gonad maturity stages occupied within the total area of the section (Nicolsky, 1963;Pinon & Ducan, 2009;Pavlov et al, 2016;Mokhtar, 2017;Pradeep, 2017).…”

Section: Reproductive Characteristicsmentioning

confidence: 99%

Reproductive characteristics of malabar blood snapper \(\textit{Lutjanus malabaricus}\) (Bloch &Schneider, 1801) in coastal marine zone of Nghe An and Ha Tinh provinces, Vietnam

Yen

Lam

et al. 2022

AJB

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Malabar blood snapper Lutjanus malabaricus (Bloch & Schneider, 1801) inhabits in coastal marine waters of Nghe An and Ha Tinh provinces, Vietnam. An investigation of the reproductive characteristics of Lutjanus malabaricus in the coastal marine waters of Nghe An and Ha Tinh provinces was undertaken between June 2020 and May 2021. The spawning season of L. malabaricus occurred throughout the year, fish were in the ripe or spawning condition in most months; but spawning peaks from late March/April and August. Females matured at a smaller size than males, with total length (TL) at first maturity being 280–330 mm for males and 230–280 mm for females. The sex ratios of 365 individuals were approximately 1/1, and the total ratio G/W was approximately 0.08−5.65% with a mean of 0.32%. The highest GSI mean value in males was 0.77 (stage IV in July) and the lowest mean value 0.03−0.11 was recorded during stages I and II in November and December. Females had the highest mean value of 1.22−1.41 (stage IV in May) and the lowest mean value of 0.07 during stages I and II in January, and 0.20 at stages I and II in October. These show that fish (L. malabaricus) were ripe or spawning from March and August in the studied waters. The first maturity size was 280−330 mm for males and 230–280 mm for females. Absolute fecundity (Fa) ranged from 24.000 to 769.000 (the mean value 112.000) ova per ovaries for L. malabaricus. In the main spawning period, high gonadal index values were found around the time of the last quarter to the first quarter moon for each month from late March or early April to August. It is suggested that L. malabaricus is a lunar-synchronized spanner in the studied waters.

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