scholarly journals Plasticity in life history traits of the native Proterorhinus semilunaris suggests high adaptive capacity in its invasive range

2018 ◽  
pp. 48 ◽  
Author(s):  
Nildeniz Top ◽  
Uğur Karakuş ◽  
Erdi Gökhan Tepeköy ◽  
John Robert Britton ◽  
Ali Serhan Tarkan
Keyword(s):  
Life History ◽  
Adaptive Capacity ◽  
Life History Traits ◽  
Sex Ratios ◽  
Somatic Growth ◽  
Native Range ◽  
Ecological Data ◽  
Reproductive Characteristics ◽  
Natural Lakes ◽  
Proterorhinus Semilunaris

Invasion risk assessments are reliant on ecological data that assist the predictions of whether an introduced species will adapt to novel conditions. Data from the native range of potential invaders can thus assist these assessments. Here, the growth and reproductive characteristics of the Western tubenose goby Proterorhinus semilunaris, a Ponto-Caspian gobiid, were assessed in three natural lakes in their native range, as there are few extant data on these traits. Across the three lakes, the gobies were found in varying abundances. Sex ratios varied, with females significantly outnumbering males in only one lake, with equal sex ratios in the other lakes. The fish always showed a positive allometric growth, but had high variability in their somatic growth rates and relative body conditions between the lakes. Scale ageing revealed all populations comprised of individuals to four years old, with one lake having individuals to 5 years old. Reproductive characteristics, including size at maturity, gonado-somatic index and fecundity, did not differ significantly between the lakes. These data suggest that plasticity in aspects of their life history traits provides P. semilunaris with considerable adaptive capacity following their introduction into novel conditions.

Life history characteristics of the potentially invasive Ponto-Caspian goby Neogobius fluviatilis in natural lakes from its native range (Black Sea region of Turkey)

2018 ◽  
Vol 69 (10) ◽  
pp. 1544 ◽  
Author(s):  
Uǧur Karakuş ◽  
Nildeniz Top ◽  
Erdi Gökhan Tepeköy ◽  
John Robert Britton ◽  
Ali Serhan Tarkan
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Somatic Growth ◽  
Reproductive Traits ◽  
Native Range ◽  
Black Sea Region ◽  
Factors Affecting ◽  
Natural Lakes ◽  
Key Factor ◽  
Growth And Reproduction

The aim of this study was to provide baseline data and fill an outstanding knowledge gap in our understanding of factors affecting the invasiveness of the Ponto-Caspian gobiid Neogobius fluviatilis. To this end, the life history traits (as somatic growth and reproduction) of N. fluviatilis were studied in three natural freshwater lakes in its native range. These populations were characterised by slow somatic growth rates, being the slowest reported across all the native and non-native ranges of N. fluviatilis. Ages were recorded to 7 years. Across the three lakes, there was considerable variability in sex ratios and reproductive traits (including length at maturity and fecundity at length and age), revealing considerable interpopulation variability. These data suggest that N. fluviatilis has considerable plasticity in the expression of its life history traits, with this plasticity argued as a key factor in facilitating the ability of N. fluviatilis to establish and invade new waters following introductions.

scholarly journals Comparative analysis of life history traits and trends of abundance in coral reefs of the orange-spotted grouper (Epinephelus coioides) from two regions of the Arabian Gulf

2019 ◽  
Vol 76 (4) ◽  
pp. 987-998 ◽  
Author(s):  
Yu-Jia Lin ◽  
Edwin M Grandcourt ◽  
Lotfi Rabaoui ◽  
Rommel H Maneja ◽  
Mohammad A Qurban ◽  
...  
Keyword(s):  
Life History ◽  
Comparative Analysis ◽  
Coral Reefs ◽  
Life History Traits ◽  
Arabian Gulf ◽  
Somatic Growth ◽  
Biological Knowledge ◽  
Epinephelus Coioides ◽  
Reproductive Tactics ◽  
Bidirectional Sex Change

Abstract The orange-spotted grouper Epinephelus coioides is one of the most important commercially exploited fish species in the Arabian Gulf. Studies to establish the basic biological knowledge necessary for sustainable exploitation are few and of limited spatial extent. We carry out a comparative analysis of life history traits of this sequential hermaphrodite and of trends of abundance in coral reefs, northern vs. southern Gulf. We found remarkable differences in sex proportion by length and age, rates of somatic growth, size at maturity and production of gonadic biomass, and no differences in the age composition, mode of growth, timing and duration of spawning, natural mortality rate, and trends of abundance. In the northern Gulf, the reproductive tactics could be diandric protogyny or protandric because males disappear at higher size and later age. In the southern Gulf, the strategy is protogyny, with full predominance of females in early life and full predominance of males in late life. In the northern Gulf, the orange-spotted grouper could exhibit bidirectional sex change. We suggest that fisheries policies should be versatile, consisting of regional-wide as well as local management measures, to account for local differences and regional-wide commonalities in life history traits and trends of abundance.

scholarly journals Different solutions lead to similar life history traits across the great divides of the amniote tree of life

2021 ◽  
Vol 28 (1) ◽  
Author(s):  
Shai Meiri ◽  
Gopal Murali ◽  
Anna Zimin ◽  
Lior Shak ◽  
Yuval Itescu ◽  
...  
Keyword(s):  
Life History ◽  
Parental Care ◽  
Biomass Production ◽  
Reproductive Strategies ◽  
Life History Traits ◽  
Reproductive Traits ◽  
Food Provisioning ◽  
Protective Shell ◽  
Production Rates ◽  
Reproductive Characteristics

AbstractAmniote vertebrates share a suite of extra-embryonic membranes that distinguish them from anamniotes. Other than that, however, their reproductive characteristics could not be more different. They differ in basic ectothermic vs endothermic physiology, in that two clades evolved powered flight, and one clade evolved a protective shell. In terms of reproductive strategies, some produce eggs and others give birth to live young, at various degrees of development. Crucially, endotherms provide lengthy parental care, including thermal and food provisioning—whereas ectotherms seldom do. These differences could be expected to manifest themselves in major differences between clades in quantitative reproductive traits. We review the reproductive characteristics, and the distributions of brood sizes, breeding frequencies, offspring sizes and their derivatives (yearly fecundity and biomass production rates) of the four major amniote clades (mammals, birds, turtles and squamates), and several major subclades (birds: Palaeognathae, Galloanserae, Neoaves; mammals: Metatheria and Eutheria). While there are differences between these clades in some of these traits, they generally show similar ranges, distribution shapes and central tendencies across birds, placental mammals and squamates. Marsupials and turtles, however, differ in having smaller offspring, a strategy which subsequently influences other traits.

scholarly journals Dopamine mediates life-history responses to food abundance in Daphnia

2020 ◽  
Vol 287 (1930) ◽  
pp. 20201069 ◽  
Author(s):  
Semona Issa ◽  
Marlène Gamelon ◽  
Tomasz Maciej Ciesielski ◽  
Kristine Vike-Jonas ◽  
Alexandros G. Asimakopoulos ◽  
...  
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Somatic Growth ◽  
Food Abundance ◽  
Reaction Norms ◽  
Life History Trait ◽  
Dopamine System ◽  
Food Ration ◽  
Endogenous Dopamine ◽  
Wide Range

Expression of adaptive reaction norms of life-history traits to spatio-temporal variation in food availability is crucial for individual fitness. Yet little is known about the neural signalling mechanisms underlying these reaction norms. Previous studies suggest a role for the dopamine system in regulating behavioural and morphological responses to food across a wide range of taxa. We tested whether this neural signalling system also regulates life-history reaction norms by exposing the zooplankton Daphnia magna to both dopamine and the dopamine reuptake inhibitor bupropion, an antidepressant that enters aquatic environments via various pathways. We recorded a range of life-history traits across two food levels. Both treatments induced changes to the life-history reaction norm slopes. These were due to the effects of the treatments being more pronounced at restricted food ration, where controls had lower somatic growth rates, higher age and larger size at maturation. This translated into a higher population growth rate ( r ) of dopamine and bupropion treatments when food was restricted. Our findings show that the dopamine system is an important regulatory mechanism underlying life-history trait responses to food abundance and that bupropion can strongly influence the life history of aquatic species such as D. magna . We discuss why D. magna do not evolve towards higher endogenous dopamine levels despite the apparent fitness benefits.

scholarly journals Erratum - Daphnia magna fitness during low food supply under different water temperature and brownification scenarios

2018 ◽  
Vol 77 (2) ◽  
Author(s):  
Andrea Gall ◽  
Martin J. Kanz ◽  
Serena Rasconi
Keyword(s):  
Life History ◽  
Water Temperature ◽  
Daphnia Magna ◽  
Growth Rates ◽  
Food Supply ◽  
Life History Traits ◽  
Somatic Growth

This corrects the article entitled “Daphnia magna fitness during low food supply under different water temperature and brownification scenarios" by the authors Andrea Gall, Martin J. Kainz and Serena Rasconi, published with DOI 10.4081/jlimnol.2016.1450. The data on somatic growth rates reported in the results section, paragraph "Life history traits", page 165, were incorrect and the rectified data are presented. Figure 4 has also been corrected accordingly.

Prey tell: what quillback rockfish early life history traits reveal about their survival in encounters with juvenile coho salmon

2020 ◽  
Vol 650 ◽  
pp. 7-18 ◽  
Author(s):  
HW Fennie ◽  
S Sponaugle ◽  
EA Daly ◽  
RD Brodeur
Keyword(s):  
Life History ◽  
Early Life ◽  
Life History Traits ◽  
Direct Evidence ◽  
Coho Salmon ◽  
Larval Fish ◽  
Early Life History ◽  
In The Wild ◽  
Otolith Microstructure Analysis ◽  
Pelagic Juvenile

Predation is a major source of mortality in the early life stages of fishes and a driving force in shaping fish populations. Theoretical, modeling, and laboratory studies have generated hypotheses that larval fish size, age, growth rate, and development rate affect their susceptibility to predation. Empirical data on predator selection in the wild are challenging to obtain, and most selective mortality studies must repeatedly sample populations of survivors to indirectly examine survivorship. While valuable on a population scale, these approaches can obscure selection by particular predators. In May 2018, along the coast of Washington, USA, we simultaneously collected juvenile quillback rockfish Sebastes maliger from both the environment and the stomachs of juvenile coho salmon Oncorhynchus kisutch. We used otolith microstructure analysis to examine whether juvenile coho salmon were age-, size-, and/or growth-selective predators of juvenile quillback rockfish. Our results indicate that juvenile rockfish consumed by salmon were significantly smaller, slower growing at capture, and younger than surviving (unconsumed) juvenile rockfish, providing direct evidence that juvenile coho salmon are selective predators on juvenile quillback rockfish. These differences in early life history traits between consumed and surviving rockfish are related to timing of parturition and the environmental conditions larval rockfish experienced, suggesting that maternal effects may substantially influence survival at this stage. Our results demonstrate that variability in timing of parturition and sea surface temperature leads to tradeoffs in early life history traits between growth in the larval stage and survival when encountering predators in the pelagic juvenile stage.

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