Spatial and biotopic distribution patterns of semianadromous burbot, Lota lota L. (Lotidae), early larvae in the Lower Ob floodplain

Koporikov, A. R.; Bogdanov, V. D.

doi:10.1134/s1067413611040084

Cited by 7 publications

(8 citation statements)

References 5 publications

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“…It is the only gadoid species that lives exclusively in freshwaters. However, in some areas, including the Baltic Sea, burbot and many other freshwater species have also adapted a brackish water life phase and are been therefore referred to as anadromous (M€ uller & Berg 1982) or semianadromous (Koporikov & Bogdanov 2011) species. Burbot is a second-rate commercial fish, and the official catches are low worldwide (Stapanian et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Life history of anadromous burbot (Lota lota, Linneaus) in the brackish Baltic Sea inferred from otolith microchemistry

Rohtla

Vetemaa

Taal

et al. 2013

Ecology of Freshwater Fish

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Strontium to calcium (Sr:Ca) and barium to calcium (Ba:Ca) ratios were quantified in 74 otoliths of brackish water-living burbot Lota lota, collected from two regions in the eastern Baltic Sea. Considerable amount of life history plasticity was observed. Ninety-six per cent of analysed burbot were of freshwater origin; only three specimens displayed signs of hatching in low-salinity (1-2) estuarine environment. Most of the juveniles emigrated from freshwater during late winter and spring the next year after birth, while nine individuals did so at the age of 2-3 months. Age and length at maturity (as determined by first freshwater spawning migration) varied from 2-6 years and 189-540 mm, respectively, with most of burbot maturing during the second or third year of life. It is hypothesised that the bulk juvenile downstream migration is triggered by high-flow conditions as evidenced by Ba: Ca peak around the point of freshwater exit. This study provides new information on burbot life history.

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Section: Introductionmentioning

confidence: 99%

Life history of anadromous burbot (Lota lota, Linneaus) in the brackish Baltic Sea inferred from otolith microchemistry

Rohtla

Vetemaa

Taal

et al. 2013

Ecology of Freshwater Fish

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“…High mortality among burbot larvae was also observed under natural conditions, where it ranged from 40 % (Schran 2000) to almost 90 % (Ghan and Sprules 1991). Under natural conditions, burbot larvae choose shallow places for their first stage of life (Kjellman 2003;Donner and Eckmann 2011;Koporikov and Bogdanov 2011). On the other hand, the present research revealed that a 10-cm tank was too deep from day 5 for the larvae to swim up to the surface.…”

Section: Discussionmentioning

confidence: 52%

“…However, it can be also found in brackish waters near river estuaries and in deep lakes (Scott and Crossman 1973;McPhail and Paragamian 2000;Hardy et al 2008;Koporikov and Bogdanov 2011). Currently, mainly due to river regulations, over-fishing, thermal anomalies and pollutions, the burbot has become an endangered species over almost the entire area of its occurrence (Lauri et al 1998;Kjellman and Eloranta 2002;Kjellman 2003;Hardy et al 2008).…”

mentioning

confidence: 99%

Dynamics of yolk sac and oil droplet utilization and behavioural aspects of swim bladder inflation in burbot, Lota lota L., larvae during the first days of life, under laboratory conditions

et al. 2013

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The study concerns investigation of early larval development of burbot, Lota lota. As part of a two-year study, the first 15 days (until the end of yolk sac resorption) of burbot larvae development under controlled conditions were examined. The aim of the study was to observe the moment of swim bladder inflation and the behavioural aspects of this process, as well as the analysis of yolk and oil droplet resorption and the beginning of exogenous nutrition. It was observed that larvae began to inflate their swim bladder on the 3rd day posthatch. On 5 DPH, none of the larvae without an inflated bladder was able to swim up the distance separating it (10 cm) from the water surface. Since 9 DPH, 50 % of larvae started exogenous feeding, and the absence of yolk was observed on 13 DPH and oil droplet on 14 DPH, while on 15 DPH, 100 % of feeding larvae were observed. The presented results indicate that the analyzed period is critical for burbot, and it is characterized by a high mortality rate (over 60 %). Additionally, the results suggest that, under controlled conditions, the latest moment when burbot larvae should be given exogenous food is 9-10 DPH and until the moment of the swim bladder inflation, larvae should be kept in tanks with a low water depth (up to 10 cm). The data presented in this study could have a significant influence on the efficiency of larvae rearing, both for aquaculture and for restocking purposes.

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“…An interesting fact is that in the conjugate system of lakes and rivers of St. Clair and Detroit, larger larvae were noted in the upper reaches [12]; their abundance also exceeded the values from the lower reaches of the Detroit River. Apparently, this pattern is due to the distribution of juveniles in the water area of the lake [10]; therefore, the number of larvae decreases in the water area of the watercourse located downstream. The same mechanism explains [10] the decrease in the number of larvae in the riverbed with an increase in temperature and water level in the riverbed.…”

Section: Discussionmentioning

confidence: 98%

“…Studies in the Ob River basin have shown that in the shallower zone, including the floodplain, where the water temperature is 3-5 0 C higher than in the riverbed, higher rates of zooplankton biomass are observed [9]. In such coastal sections of rivers, the highest ecological density of burbot larvae is noted [10], because they are the most favorable for them, since with the growth of the larvae, the need for the volume and size of consumed food items, including the most preferred ones, increases [5;11].…”

Section: Discussionmentioning

confidence: 99%

Downstream migration of Burbot Larvae (Lota lota) in the section of the Irtysh River

Chemagin,

Drabovich,

Popova

2023

E3S Web of Conf.

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In this work, a study was made of the downstream migration of burbot larvae. To carry out the control catch, the larvae were trawled during the spring flood using a small motor boat. As a result of the work, it was found that the main factor affecting the number of larvae in the watercourse is the water temperature factor. Statistical analysis showed that more than 40% of the factors influencing the runoff of burbot larvae in the studied section of the river were taken into account. A mathematical model is proposed that reflects the dynamics of the number of larvae depending on the water temperature. It was shown that during the study period, with an increase in the level and temperature of the water, as well as the speed of the current, the number of larvae decreased from 0.7 to 0.005 ind./m3. The body length of the larva in the control catches ranged from 2.98 to 4.71 mm. Control fishing was carried out immediately after the river was opened from ice, the duration of the period during which migration continued was 10 days. Larvae were not recorded in trawl catches when the water temperature reached 6.53 ¼.

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Spatial and biotopic distribution patterns of semianadromous burbot, Lota lota L. (Lotidae), early larvae in the Lower Ob floodplain

Cited by 7 publications

References 5 publications

Life history of anadromous burbot (Lota lota, Linneaus) in the brackish Baltic Sea inferred from otolith microchemistry

Life history of anadromous burbot (Lota lota, Linneaus) in the brackish Baltic Sea inferred from otolith microchemistry

Dynamics of yolk sac and oil droplet utilization and behavioural aspects of swim bladder inflation in burbot, Lota lota L., larvae during the first days of life, under laboratory conditions

Downstream migration of Burbot Larvae (Lota lota) in the section of the Irtysh River

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