Fecundity of flounder, Pleuronectes flesus, in the Baltic Sea — Reproductive strategies in two sympatric populations

Nissling, Anders; Dahlman, Gry

doi:10.1016/j.seares.2010.02.001

Cited by 39 publications

(44 citation statements)

References 24 publications

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“…For instance, several tagging studies-reviewed by Aro (1989Aro ( , 2002 and Florin (2005)-have shown that the pelagic spawning flounders generally feed in shallow waters and migrate to spawn in deep waters, while demersal flounders usually reside in the archipelago and coastal areas throughout their lives (Bagge, 1981;Aro and Sjöblom, 1983). Also, while the growth of flounders varies geographically, decreasing from southwest to northeast (Drevs et al, 1999), there are also differences in growth between the two flounder types; pelagic flounders grow faster than the demersal flounders (Nissling and Dahlman, 2010). Furthermore, the demersal flounders commence spawning also somewhat earlier and have higher fecundity than the pelagic ones (Nissling and Dahlman, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Also, while the growth of flounders varies geographically, decreasing from southwest to northeast (Drevs et al, 1999), there are also differences in growth between the two flounder types; pelagic flounders grow faster than the demersal flounders (Nissling and Dahlman, 2010). Furthermore, the demersal flounders commence spawning also somewhat earlier and have higher fecundity than the pelagic ones (Nissling and Dahlman, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…As salinity decreases, so does the specific gravity of seawater, rendering the production of neutrally buoyant eggs a challenging task. The relatively few marine fish species that thrive in the Baltic Sea exhibit adaptations to the low salinity and temperature they have encountered (Nissling et al, 2002(Nissling et al, , 2006Hemmer-Hansen et al, 2007;Florin and Höglund, 2008;Nissling and Dahlman, 2010;Guo et al, 2015). Some of them show ecological adaptations allowing the spawning of pelagic eggs that can maintain neutral or positive buoyancy in deep basins, where salinity is higher than in coastal waters (Nissling et al, 1994(Nissling et al, , 2002Vallin and Nissling, 2000;Nissling and Dahlman, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…These studies revealed adaptations not only in egg size and buoyancy, but also in sperm physiology: the activation of sperm from pelagic flounders requires salinities of above 10 psu, while sperm from demersal flounders can be activated at salinities as low as 3 psu and maintains high motility at salinities encountered in the northern Baltic Sea (Nissling et al, 2002). In addition to spawning behavior and reproductive traits, also migration patterns (Aro, 1989), growth differences (Nissling and Dahlman, 2010), maturation time , fecundity (Nissling and Dahlman, 2010), fecundity regulation (Nissling et al, 2015), and morphology (Jonsson, 2014;Stålberg, 2015) for different flounder populations across the Baltic have been described and compared between the two ecotypes. For instance, several tagging studies-reviewed by Aro (1989Aro ( , 2002 and Florin (2005)-have shown that the pelagic spawning flounders generally feed in shallow waters and migrate to spawn in deep waters, while demersal flounders usually reside in the archipelago and coastal areas throughout their lives (Bagge, 1981;Aro and Sjöblom, 1983).…”

Section: Introductionmentioning

confidence: 99%

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Platichthys solemdali sp. nov. (Actinopterygii, Pleuronectiformes): A New Flounder Species From the Baltic Sea

et al. 2018

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The European flounder Platichthys flesus (Linnaeus, 1758) displays two contrasting reproductive behaviors in the Baltic Sea: offshore spawning of pelagic eggs and coastal spawning of demersal eggs, a behavior observed exclusively in the Baltic Sea. Previous studies showed marked differences in behavioral, physiological, and life-history traits of flounders with pelagic and demersal eggs. Furthermore, a recent study demonstrated that flounders with pelagic and demersal eggs represent two reproductively isolated, parapatric species arising from two distinct colonization events from the same ancestral population. Using morphological data we first established that the syntypes on which the original description of P. flesus was based belong to the pelagic-spawning lineage. We then used a combination of morphological and physiological characters as well as genome-wide genetic data to describe flounders with demersal eggs as a new species:Platichthys solemdali sp. nov. The new species can be clearly distinguished from P. flesus based on egg morphology, egg and sperm physiology as well as via population genetic and phylogenetic analyses. While the two species do show some minor morphological differences in the number of anal and dorsal fin rays, no external morphological feature can be used to unambiguously identify individuals to species. Therefore, we developed a simple molecular diagnostic test able to unambiguously distinguish P. solemdali from P. flesus with a single PCR reaction, a tool that should be useful to fishery scientists and managers, as well as to ecologists studying these species.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Platichthys solemdali sp. nov. (Actinopterygii, Pleuronectiformes): A New Flounder Species From the Baltic Sea

et al. 2018

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“…In the Baltic Sea, 2 alternative strategies were described: one for southern and one for northern portions of the sea (Nissling et al 2002). In the southern Baltic, flounder migrate from coastal feeding areas to spawn in the deep basins and have large, pelagic eggs which are positively buoyant despite the low salinity of the area (Nissling et al 2002, Nissling & Dahlman 2010. In the northern Baltic, flounder are more stationary and spawn in shallow bank or coastal areas.…”

Section: Introductionmentioning

confidence: 99%

Plasticity of European flounder life history patterns discloses alternatives to catadromy

Daverat¹,

Morais²,

Dias³

et al. 2012

Mar. Ecol. Prog. Ser.

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European flounder Platichthys flesus life history patterns were investigated in 3 basins along a latitudinal gradient (Minho, N Portugal; Gironde, SW France; Seine, N France). We used coupled Sr:Ca and Ba:Ca otolith signatures and microstructure to retrospectively determine habitats occupied by flounder during their life, including early larval ontogeny. Flounder exhibited high life history plasticity among and even within basins, apparent by the diversity of habitats used during larval ontogeny and throughout their lives, and by the age at which flounder migrated to freshwater. Egg signatures probably had a strong maternal influence, and our interpretation suggests that flounder spawned and/or hatched predominantly in brackish waters in the Minho, while in the Gironde and Seine, flounder spawned and/or hatched either in coastal, brackish or freshwater environments. The freshwater egg signature was most frequent in the Seine. These interpretations contradict the current general assumption that flounder spawn exclusively in coastal waters. During pre-metamorphosis and metamorphosis, flounder were predominantly in brackish waters in the Minho, while in the Gironde and Seine, they were mainly in coastal and freshwater environments, respectively. The diversity of flounder life histories (LH) (i.e. sequence of habitat residence: freshwater, brackish or coastal) after metamorphosis was similar between the Minho (LH = 13), Gironde (LH = 13) and Seine (LH = 14) basins. The age at which flounder migrated to freshwater also varied among sites, at an earlier age in the Minho and Gironde (< 0.5 yr old) than in the Seine, where flounder migrating from the coast into freshwater reached maximum frequencies at age 1.3 yr old. Thus, catadromy in European flounder may be facultative, and the factors influencing flounder high LH plasticity deserve thorough research.

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Ecology of reproduction

Rijnsdorp¹,

Witthames

2014

Flatfishes

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Fecundity of flounder, Pleuronectes flesus, in the Baltic Sea — Reproductive strategies in two sympatric populations

Cited by 39 publications

References 24 publications

Platichthys solemdali sp. nov. (Actinopterygii, Pleuronectiformes): A New Flounder Species From the Baltic Sea

Platichthys solemdali sp. nov. (Actinopterygii, Pleuronectiformes): A New Flounder Species From the Baltic Sea

Plasticity of European flounder life history patterns discloses alternatives to catadromy

Ecology of reproduction

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