Fish as Reference Species in Different Water Masses

Christophe, Minier; Amara, Rachid; Lepage, Mario

doi:10.1016/b978-0-12-800949-9.00013-9

Cited by 11 publications

(3 citation statements)

References 104 publications

(83 reference statements)

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“…The composition of biome usually varies greatly under different environmental conditions (Whittaker et al, 1973;Dar et al, 2014). Although environmental conditions are more stable in the tropical open ocean than those in the coastal or offshore ecosystems, changes in dominant species with water mass may still exist on basin scale (Borgne et al, 2003;Christophe et al, 2015). The migratory mesopelagic fish includes only eight families (Myctophidae, Argentinidae, Sternoptychidae, Astronesthidae, Gonostomatidae, Melanostomiatidae, Stomiatidae, and Chauliodontidae) (Polis et al, 1997;Salvanes and Kristoffersen, 2001;Benoit-Bird and Lawson, 2016).…”

Section: Spatial Variations Of Deep Scattering Layers and Diel Vertic...mentioning

confidence: 99%

Both Dissolved Oxygen and Chlorophyll Explain the Large-Scale Longitudinal Variation of Deep Scattering Layers in the Tropical Pacific Ocean

2022

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The ecological characteristics of mesopelagic community are crucial to understand the pelagic food web, replenishment of pelagic fishery resources, and building models of the biological pump. The deep scattering layers (DSLs) and diel vertical migration (DVM) are typical characteristics of mesopelagic communities, which have been widely observed in global oceans. There is a strong longitudinal environmental gradient across the tropical Pacific Ocean. Nevertheless, the longitudinal variation of DSLs along this gradient was still largely unclear until now. We investigated the DSLs across the tropical Pacific Ocean using data of shipboard acoustic Doppler current profiler at 38 kHz from July to December 2019. The study area was divided into three sub-regions by cluster analysis of environmental variables: the western part (WP), the transition part (TP), and the eastern part (EP). The result confirmed that the longitudinal variation of DSLs and DVM: the weight migrating depth of mesopelagic organisms was reduced from 571.2 ± 85.5 m in the WP to 422.6 ± 80.8 m in the EP; while the migrating proportion was minimum in the TP (35.2 ± 12.8%), and increased to 86.7 ± 16.2% in the EP. Multiple regressions analysis showed that both the mesopelagic average oxygen and chlorophyll a concentration were significant factors which influenced the upper boundary depth and weight migrating depth, while the center mass depth was only influenced by the chlorophyll a. Since higher demand of most predators of mesopelagic animals for dissolved oxygen and light intensity, the limitations of predator behavior by environmental conditions might explain the observed spatial heterogeneity of DSLs. Combining the previous results and the findings of this study, it implied that declined biomass, shallower habituating depths, and lower migration proportion of mesopelagic animals under more extremely oligotrophic conditions with global change in future, would reduce the active carbon flux and hinder food supply to deep-sea biological communities in the tropical Pacific Ocean.

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Section: Spatial Variations Of Deep Scattering Layers and Diel Vertic...mentioning

confidence: 99%

Both Dissolved Oxygen and Chlorophyll Explain the Large-Scale Longitudinal Variation of Deep Scattering Layers in the Tropical Pacific Ocean

2022

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“…To provide a perspective of the status and trends in inland fisheries across the globe, it is recommended that a number of sentinel fisheries based on key river basins is established. There are few examples of the sentinel fishery survey approach being used in inland waters, although sentinel species have been used as indicators of regional stock status or as indicators of environmental disturbance in freshwater ecosystems (Christophe et al, 2015; Gibbons & Munkittriek, 1994; ICES, 2018). A subset of river basins or elements of a fishery developed under a sentinel fisheries monitoring programme, such as those set up for “index” or “monitored” salmon rivers in the ICES region (ICES, 2021), could provide much needed continuous records of otherwise data‐poor fisheries and indicate the overall state of a river basin's fisheries.…”

Section: Discussionmentioning

confidence: 99%

Putting the fish into inland fisheries – A global allocation of historic inland fish catch

2023

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Inland waters support the livelihoods of up to 820 million people and provide fisheries that make an essential contribution towards food security, particularly in the developing world where 90% of inland fisheries catch is consumed. Despite their importance, inland fisheries are overlooked in favour of other water use sectors deemed more economically important. Inland fisheries are also driven by external factors such as climate change and habitat loss, which impedes our ability to manage them sustainably. Using a river basin approach to allocate fish catch, we have provided an integrated picture of how different inland water bodies contribute to global inland fisheries catches. There is a substantial amount of information available on inland fisheries, but it has never been synthesised to build this global picture. Fishery statistics from river basins, lakes, floodplains, hydrobasins, and countries covering a time span from 1960–2018 were analysed. Collation of basin‐scale fisheries statistics suggests a global inland catch of ≈17.4 million tonnes (PSE = ±3.93 million tonnes) in 2010, considerably more than the 10.8 million tonnes published by the United Nations Food and Agriculture Organization (FAO), but in line with estimates based on household consumption. The figure is considered a likely maximum due to recent reductions in catches because of closures, threats, and fisheries declines in the most productive fisheries. It is recommended that sentinel fisheries, which are important for food provision, employment, or where threats facing a fishery could cause a deterioration in catch, are identified to provide the baseline for a global monitoring programme.

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“…Due to their susceptibility and ease of sample collection, fishes are among one of the most popular organisms, which have long been widely used as sentinel species for monitoring ecological changes (Beeby, 2001;Christophe et al, 2015;Frame and Dickerson, 2006;National Research Council, 1991;Senarat et al, 2015Senarat et al, , 2018aSenarat et al, , 2018bSenarat et al, , 2019Senarat et al, , 2020Singkhanan et al, 2019). Their responses in different aspects (e.g., anatomical, histological, physiological, and behavioral ones) not only reflect various environmental crises, such as water pollution, chemical contamination, and oxygen depletion, but also provide us a good early warning system for a forthcoming ecological catastrophe (Beeby, 2001).…”

Section: Introductionmentioning

confidence: 99%

Monitoring of reproductive health in the striped catfish Pangasianodon hypophthalmus (Sauvage, 1878) from the Saen Saep Canal, Thailand

Puttipong

Senarat

Kettratad

et al. 2021

VIS

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Khlong Saen Saep is one of the most important and large canal systems in Bangkok, Thailand. However, the emergence of heavily polluted water has occasionally been reported due to the domestic sewage and industrial effluents discharged into the system. This situation may affect the reproductive status of aquatic lives residing in this canal. To evaluate the reproductive status of the canal inhabitant, the striped catfish Pangasianodon hypophthalmus (Sauvage, 1878)—a common dweller of the Saen Saep Canal—was collected from two selected stations, the Bumpen Nua Temple and the Kamalun Islam Mosque. The fish gonads were then anatomically and histologically examined. The results indicated that neither parasites nor ovary with external abnormality were found. Nevertheless, several histological alterations were detected, including vacuolar degeneration of previtellogenic oocytes, accumulation of melanomacrophage centers (MMCs), and atretic oocytes. Moreover, severe histopathological changes, such as the eosinophilic cytoplasm of spermatogonia, MMCs, blood congestion, and syncytium of spermatozoa, were observed in the fish testis. Our study suggested that the environmental stress and pollutions previously reported from the Saen Saep Canal possibly underpin the gonadal impairments of P. hypophthalmus examined and may have adverse impact on the reproductive health of others living in this canal system

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Fish as Reference Species in Different Water Masses

Cited by 11 publications

References 104 publications

Both Dissolved Oxygen and Chlorophyll Explain the Large-Scale Longitudinal Variation of Deep Scattering Layers in the Tropical Pacific Ocean

Both Dissolved Oxygen and Chlorophyll Explain the Large-Scale Longitudinal Variation of Deep Scattering Layers in the Tropical Pacific Ocean

Putting the fish into inland fisheries – A global allocation of historic inland fish catch

Monitoring of reproductive health in the striped catfish Pangasianodon hypophthalmus (Sauvage, 1878) from the Saen Saep Canal, Thailand

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