Effect of salinity on the oxygen consumption of larvae of the silversides Odontesthes hatcheri and O. bonariensis (Osteichthyes, Atherinopsidae)

Tsuzuki, Mônica Yumi; Strüssmann, Carlos Augusto; Takashima, Fumio

doi:10.1590/s1516-89132008000300017

Cited by 8 publications

(7 citation statements)

References 21 publications

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“…Negative impacts of low salinities on OCRs have also been recorded for larvae of various invertebrate species [37], [42], [43], [44], [45], [77], [78], [79]. Because the gastropod velum has been described as a major respiratory organ for gastropod larvae [72], the decrease in oxygen consumption by C. peruviana larvae would be closely linked to the lack of activity and decreased size of the velum in stressed veligers, considering that a smaller velum implies a smaller surface area available for gas exchange [72].…”

Section: Discussionmentioning

confidence: 94%

“…After hatching, however, the free-living larval stages may also be exposed to low-salinity stress, which can be particularly detrimental because they lack adequate physical protection [35] and because they no longer have the maternal physical protection that could otherwise potentially have isolated them from the stressful environmental conditions [33]. Not surprisingly, salinity stress can dramatically affect larval behavior and development [7], [26], [36], [37], [38], [39], [40], [41], increase developmental mortality [23], alter rates of oxygen consumption [42], [43], [44], [45], negatively impact swimming activity [28], [46] and feeding rates [7]. In addition, discontinuous salinities can notably alter the distribution of larvae in the water column [26], [46].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Low Salinity on Adult Behavior and Larval Performance in the Intertidal Gastropod Crepipatella peruviana (Calyptraeidae)

et al. 2014

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Shallow-water coastal areas suffer frequent reductions in salinity due to heavy rains, potentially stressing the organisms found there, particularly the early stages of development (including pelagic larvae). Individual adults and newly hatched larvae of the gastropod Crepipatella peruviana were exposed to different levels of salinity stress (32(control), 25, 20 or 15), to quantify the immediate effects of exposure to low salinities on adult and larval behavior and on the physiological performance of the larvae. For adults we recorded the threshold salinity that initiates brood chamber isolation. For larvae, we measured the impact of reduced salinity on velar surface area, velum activity, swimming velocity, clearance rate (CR), oxygen consumption (OCR), and mortality (LC50); we also documented the impact of salinity discontinuities on the vertical distribution of veliger larvae in the water column. The results indicate that adults will completely isolate themselves from the external environment by clamping firmly against the substrate at salinities ≤24. Moreover, the newly hatched larvae showed increased mortality at lower salinities, while survivors showed decreased velum activity, decreased exposed velum surface area, and decreased mean swimming velocity. The clearance rates and oxygen consumption rates of stressed larvae were significantly lower than those of control individuals. Finally, salinity discontinuities affected the vertical distribution of larvae in the water column. Although adults can protect their embryos from low salinity stress until hatching, salinities <24 clearly affect survival, physiology and behavior in early larval life, which will substantially affect the fitness of the species under declining ambient salinities.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Effects of Low Salinity on Adult Behavior and Larval Performance in the Intertidal Gastropod Crepipatella peruviana (Calyptraeidae)

et al. 2014

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“…This notion was only corrected when workers at Fisheries Experimental Stations in Japan, after much struggling to keep, transport and stock pejerrey in freshwater, realized the benefits of adding 3–5 psu (practical salinity units) of salt (NaCl) to the holding water. These empirical observations led to the studies of Tsuzuki et al (Tsuzuki, Aikawa, Strüssmann & Takashima 2000a, b; Tsuzuki, Ogawa, Strüssmann, Maita & Takashima 2000, 2007; Tsuzuki, Strüssmann & Takashima 2007), who demonstrated not only better survival and growth performance in brackish water but also the positive effects of salinity on ionic and osmoregulatory balance and mitigation of stress response (e.g. lowering of blood plasma cortisol level).…”

Section: Constraints To the Development Of Pejerrey Farming In South mentioning

confidence: 99%

Historical aspects, current status and prospects of pejerrey aquaculture in South America

et al. 2008

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The pejerrey Odontesthes bonariensis (Valenciennes, 1835) is an inland water ¢sh from the Pampas region comprising part of Argentina, Uruguay and the South of Brazil. Pejerrey is a very popular ¢sh in this region and has a long history of domestic and international introductions, which attests to the high quality and market value of its £esh, as well as its attractiveness as a game ¢sh. The desirable characteristics of pejerrey also make it a good candidate for aquaculture, and the ¢rst trials on pejerrey cultivation (atheriniculture) were started more than a century ago in Argentina. In spite of the considerable interest in its development, little progress has been made and atheriniculture is still restricted to propagation and stocking for sport ¢shing purposes. In this review, we summarize the history of atheriniculture and the biological, technological, scienti¢c, cultural and infrastructural constraints to pejerrey aquaculture development thus far. We also suggest possible scenarios of pejerrey aquaculture development compatible with the socio^economic conditions of South American countries. Our projections also take into consideration recent scienti¢c ¢ndings on the biology of pejerrey and technological advances in seafood processing, storage and transportation, as well as the latest trends of seafood consumption and international markets. The best production strategy remains to be determined by trial and error but it is likely that, initially, production should focus on a di¡erentiated, high-quality ¢sh for the premium or international markets rather than attempting to compete with the cheap ¢sh from natural sources. An international cooperation project with Japan has successfully demonstrated the feasibility of breeding pejerrey in captivity and mass producing seeds e⁄ciently in Argentina, and has provided the foundation for the development of intensive and extensive farming of this species.

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“…Considering the substantial ecological boundary that the marine‐to‐freshwater transition poses for fishes but lack of known genetic divergence between these two species, we investigate underlying changes at the genomic level associated with freshwater adaptation in these species by comparing gill transcriptomes from wild‐caught O. argentinensis (marine) and O. bonariensis (freshwater). We also test for phenotypic plasticity in gene expression by comparing gill transcriptomes from laboratory‐housed O. bonariensis , which is still relatively euryhaline (Tsuzuki, Strüssmann, & Takashima, ; Vigliano, Aleman, Quiroga, & Nieto, ), in freshwater and brackish salinities. Adaptive genetic divergence can take place by mutations in the coding sequences or by changes to cis ‐regulatory elements that affect expression, though often changes are the result of both (Hoekstra & Coyne, ).…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic differentiation underlying marine‐to‐freshwater transitions in the South American silversides Odontesthes argentinensis and O. bonariensis (Atheriniformes)

Hughes

Somoza

Nguyen

et al. 2017

Ecology and Evolution

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Salinity gradients are critical habitat determinants for freshwater organisms. Silverside fishes in the genus Odontesthes have recently and repeatedly transitioned from marine to freshwater habitats, overcoming a strong ecological barrier. Genomic and transcriptomic changes involved in this kind of transition are only known for a few model species. We present new data and analyses of gene expression and microbiome composition in the gills of two closely related silverside species, marine O. argentinensis and freshwater O. bonariensis and find more than three thousand transcripts differentially expressed, with osmoregulatory/ion transport genes and immune genes showing very different expression patterns across species. Interspecific differences also involve more than one thousand transcripts with nonsynonymous SNPs in the coding sequences, most of which were not differentially expressed. In addition to characterizing gill transcriptomes from wild-caught marine and freshwater fishes, we test experimentally the response to salinity increases by O. bonariensis collected from freshwater habitats. Patterns of expression in gill transcriptomes of O. bonariensis exposed to high salinity do not resemble O. argentinensis mRNA expression, suggesting lack of plasticity for adaptation to marine conditions in this species. The diversity of functions associated with both the differentially expressed set of transcripts and those with sequence divergence plus marked microbiome differences suggest that multiple abiotic and biotic factors in marine and freshwater habitats are driving transcriptomic differences between these species. K E Y W O R D S

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Effect of salinity on the oxygen consumption of larvae of the silversides Odontesthes hatcheri and O. bonariensis (Osteichthyes, Atherinopsidae)

Abstract: Starved larvae of the silversides O. hatcheri (2-and 5-days-old)

Cited by 8 publications

References 21 publications

Effects of Low Salinity on Adult Behavior and Larval Performance in the Intertidal Gastropod Crepipatella peruviana (Calyptraeidae)

Effects of Low Salinity on Adult Behavior and Larval Performance in the Intertidal Gastropod Crepipatella peruviana (Calyptraeidae)

Historical aspects, current status and prospects of pejerrey aquaculture in South America

Transcriptomic differentiation underlying marine‐to‐freshwater transitions in the South American silversides Odontesthes argentinensis and O. bonariensis (Atheriniformes)

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