Diel variation in food intake and diet composition of three native fish species in floodplain lagoons of the Macintyre River, Australia

Construction of cascade dams has been shown to have impacts on fish assemblages and biodiversity. Yet, there is no literature on fish assemblages in the Murum River that connects the cascading Bakun and Murum dams in Sarawak, Malaysia. Hence, study on this modified ecosystem is necessitated to better understand the effects of the cascade dam construction on fish fauna. For this, fish samples were caught at five stations located along the river during both dry and wet seasons. Environmental parameters were taken concurrently with fish sampling. Length-weight relationship, condition factors, and diet composition of selected fish species in the river were also determined. The present study demonstrated that there are indications of the impact of cascading dams on the formation of a complex ecosystem in the Murum River, that is, changing from the shallow downstream of the Murum Dam to the deep transitional and inundated zone of the Bakun reservoir. The transitional zone in the Murum River exhibited the lowest fish species diversity, richness, and evenness during the dry season due to low pH and DO coupled with high turbidity. The biological indices improved when the water quality improved during the wet season. On the contrary, the diversity and evenness indices at the inundated tributary station decreased remarkably during the wet season, likely due to the migration of fish during the onset of the rainy season. This study showed that Barbonymus schwanenfeldii has a wider feeding habit which contributes to its higher distribution and abundance in the Murum River. The growth patterns of B. schwanenfeldii, Cyclocheilichthys apogon, Hampala macrolepidota, Lobocheilos ovalis, and Osteochilus enneaporos were better during wet than dry season. Overall, the condition factor of all native fish species in the Murum River was in poor to fair condition, whereas the exotic species, Oreochromis mossambicus, exhibited excellent condition (K value > 2) for both seasons. The increase in the number of O. mossambicus coupled with its high condition factor indicates biological intrusion and a potential threat to the native fish species in the Murum River. Continuous monitoring is essential to detect in-time risk issues associated with environmental degradation and biological invasion in this regulated and inundated river ecosystem.

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Impact of Oreochromis niloticus (Linnaeus, 1758) (Pisces: Cichlidae) invasion on taxonomic and functional diversity of native fish species in the upper Kabompo River, northwest of Zambia

Ecology and Evolution ◽

10.1002/ece3.8031 ◽

2021 ◽

Author(s):

Arthertone Jere ◽

Wilson W. L. Jere ◽

Austin Mtethiwa ◽

Daud Kassam

Keyword(s):

Functional Diversity ◽

Fish Species ◽

Oreochromis Niloticus ◽

Native Fish

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Advancing improvement in riverine water quality caused a non-native fish species invasion and native fish fauna recovery

Scientific Reports ◽

10.1038/s41598-021-93751-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Łukasz Głowacki ◽

Andrzej Kruk ◽

Tadeusz Penczak

Keyword(s):

Water Quality ◽

Fish Species ◽

Native Species ◽

Interference Competition ◽

Fish Fauna ◽

Species Traits ◽

Native Fish ◽

Biological Degradation ◽

Species Invasion ◽

Prussian Carp

AbstractThe knowledge of biotic and abiotic drivers that put non-native invasive fishes at a disadvantage to native ones is necessary for suppressing invasions, but the knowledge is scarce, particularly when abiotic changes are fast. In this study, we increased this knowledge by an analysis of the biomass of most harmful Prussian carp Carassius gibelio in a river reviving from biological degradation. The species' invasion followed by the invasion's reversal occurred over only two decades and were documented by frequent monitoring of fish biomass and water quality. An initial moderate improvement in water quality was an environmental filter that enabled Prussian carp’s invasion but prevented the expansion of other species. A later substantial improvement stimulated native species’ colonization of the river, and made one rheophil, ide Leuciscus idus, a significant Prussian carp’s replacer. The redundancy analysis (RDA) of the dependence of changes in the biomass of fish species on water quality factors indicated that Prussian carp and ide responded in a significantly opposite way to changes in water quality in the river over the study period. However, the dependence of Prussian carp biomass on ide biomass, as indicated by regression analysis and analysis of species traits, suggests that the ecomorphological similarity of both species might have produced interference competition that contributed to Prussian carp’s decline.

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Digestible energy of crude glycerol for pacu and silver catfish

Ciência Rural ◽

10.1590/0103-8478cr20131426 ◽

2014 ◽

Vol 44 (8) ◽

pp. 1448-1451 ◽

Cited By ~ 7

Author(s):

Rafael Ernesto Balen ◽

Patrick Nereu Tetu ◽

Robie Allan Bombardelli ◽

Paulo Cesar Pozza ◽

Fábio Meurer

Keyword(s):

Fish Species ◽

Crude Glycerol ◽

Energy Content ◽

Biodiesel Production ◽

Native Fish ◽

Neotropical Fish ◽

Digestible Energy ◽

Silver Catfish ◽

Glycerol Utilization ◽

Good Potential

The increase in global biodiesel production is originating a glycerol surplus, which has no defined destination. An alternative to overcome this problem is its use as energy source in animal feeding. In Brazil, Pacu (Piaractus mesopotamicus) is one of the most farmed native fish species, whereas Silver catfish (Rhamdia quelen) is suitable for production in subtropical region. Considering little knowledge about crude glycerol utilization in feeds for Neotropical fish species, it was evaluated the apparent digestibility coefficients (ADCs) for energy of crude glycerol for P. mesopotamicus and R. quelen. The digestibility and digestible energy content of crude glycerol can be considered excellent even when compared to energy of common ingredients such as maize and wheat, presenting 0.97 and 0.89 of energy ADCs, and 15.2 and 13.95MJ kg-1 of digestible energy for Pacu and Silver catfish, respectively. In conclusion, crude glycerol is an energetic ingredient with good potential in Brazilian native fish diets.

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The first unified inventory of non-native fishes of the South Caucasian countries, Armenia, Azerbaijan, and Georgia

Knowledge and Management of Aquatic Ecosystems ◽

10.1051/kmae/2021028 ◽

2021 ◽

pp. 32

Author(s):

Tatia Kuljanishvili ◽

Levan Mumladze ◽

Bella Japoshvili ◽

Namig Mustafayev ◽

Shaig Ibrahimov ◽

...

Keyword(s):

Black Sea ◽

Fish Species ◽

Caspian Sea ◽

Native Species ◽

Biological Diversity ◽

Native Fish ◽

The Black Sea ◽

The South ◽

In The Wild ◽

Native Fishes

The South Caucasus (SC) region is recognized for its high biological diversity and various endemic animal taxa. The area has experienced many fish introductions over the years, but the overall information about non-native fishes in the three SC countries, Armenia, Azerbaijan, and Georgia did not exist. Although these three countries belong to the Kura River drainage, Caspian Sea basin (only the western half of Georgia drains into the Black Sea), the legislative framework for each country regarding introduction of non-native fish species and their treatment is different and poorly developed. The goal of the present study was to make an initial inventory of non-native fish species in the three SC countries, and summarize the existing knowledge as a basis for future risk assessment models and formulation of regional management policies. Here, we present a unified list of 27 non-native species recorded in the wild in Armenia, Azerbaijan, and Georgia. Among these 27 species, eight were translocated from the Black Sea basin to the Caspian Sea basin. Out of these 27 non-native fishes, 15 species have become established (three of them being considered invasive) and six fish species could not survive in the wild.

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SOME TRENDS IN FRESHWATER TROPICAL AQUACULTURE AND THEIR IMPACT ON STUDIES OF THE CLIMBING PERCH ANABAS TESTUDINEUS (ANABANTIDAE) REPRODUCTIVE BIOLOGY

Fisheries ◽

10.37663/0131-6184-2020-4-85-89 ◽

2020 ◽

Vol 2020 (4) ◽

pp. 85-89

Author(s):

Dmitry Zworykin

Keyword(s):

Reproductive Biology ◽

Fish Species ◽

Applied Research ◽

Tropical Fish ◽

Native Fish ◽

Turn Of The Millennium ◽

Anabas Testudineus ◽

Climbing Perch ◽

Contemporary Science ◽

Tropical Aquaculture

The dynamics of publication activities devoted to the climbing perch from 1969 to 2018 is analyzed. It is shown that sharp increases in the number of publications at the turn of the millennium coincide with changes in international and national strategies for tropical fish aquaculture, focusing on cultivation of fast-growing native fish species and small farms support. These programs have led to a surge in applied research and publications on the climbing perch, as one of the most promising species. Unfortunately, some of these papers have been published in journals that are unreliable according to the criteria of contemporary science and contain controversial conclusions. Certain consequences of these trends are noted and challenges outlined.

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Evaluation of Decreased Flows in the Grand Canyon to Benefit Native Fish Species

HydroShare Resources ◽

10.4211/hs.b28565ed451a4b3dadc2973cfcf29ed3 ◽

2020 ◽

Keyword(s):

Fish Species ◽

Grand Canyon ◽

Native Fish

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Circumstantial evidence of effect of trout farming on length-weight relations of native fish species: Barbus oligolepis (Battalgil, 1941) and Squalius cii (Richardson, 1857)

Journal of Aquaculture & Marine Biology ◽

10.15406/jamb.2020.09.00282 ◽

2020 ◽

Vol 9 (3) ◽

pp. 87-90

Author(s):

elin Ertürk Gürkan

Keyword(s):

Fish Species ◽

Growth Parameters ◽

B Value ◽

Native Fish ◽

Growth Type ◽

Positive Allometry ◽

Fish Samples ◽

Extra Food ◽

One Year ◽

And Control

This study was carried out to reveal how the aquaculture activities, located near the stream bed, effect the length-weight relations of native freshwater fish. Fish samples were collected on monthly for one year on the Kocabaş Stream (Çanakkale), a trout farm constructed next to stream. Fish specimens were collected from up and down sections of the trout farm and control station selected from another branch of the stream by electrofishing between August 2015-July 2016. The growth type sign; b value in length-weight relationship indicates that both species are in positive allometry at the down station and isometric growth at the upper station. Fish farm might affect the growth type of both species positively due to contribution of extra food resources originated from the farm via discharge of waste water of trout farm at the down section. However, this hypothesis should be tested by proper growth parameters of the fish species.

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Attenuation of circadian rhythms of food intake and respiration in aging diabetes-prone BHE/Cdb rats

AJP Regulatory Integrative and Comparative Physiology ◽

10.1152/ajpregu.2000.279.1.r230 ◽

2000 ◽

Vol 279 (1) ◽

pp. R230-R238 ◽

Cited By ~ 6

Author(s):

Clayton E. Mathews ◽

Kathie Wickwire ◽

Wiliam P. Flatt ◽

Carolyn D. Berdanier

Keyword(s):

Food Intake ◽

High Fat Diet ◽

Diet Composition ◽

Stock Diet ◽

Sprague Dawley ◽

High Fat ◽

Daily Rhythms ◽

Sprague Dawley Rats ◽

Typical Day ◽

Food Intake Patterns

The hypothesis that BHE/Cdb rats with mutations in their mitochondrial genome might accommodate this mutation by changing their food intake patterns was tested. Four experiments were conducted. Experiments 1 and 2examined food intake patterns of BHE/Cdb rats fed a stock diet or BHE/Cdb and Sprague-Dawley rats fed a high-fat diet from weaning. Experiment 3 examined the daily rhythms of respiration and heat production in these rats at 200 days of age. Experiment 4 examined the effects of diet composition on these measurements at 50-day intervals. The Sprague-Dawley rats, regardless of diet, had the typical day-night rhythms of feeding and respiration. In contrast, the BHE/Cdb rats fed the high-fat diet showed normal rhythms initially, but with age, these rhythms were attenuated. The changes in rhythms preceded the development of glucose intolerance.

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