Fish assemblage and diversity in lakes of western and central Turkey: role of geo-climatic and other environmental variables

Boll, Thomas J.; Levi, Eti E.; Bezirci, Gizem; Özuluğ, Müfit; Tavşanoğlu, Ülkü Nіhan; Çakıroğlu, Ayşe İdil; Özcan, Seval; Brucet, Sandra; Beklioğlu, Meryem

doi:10.1007/s10750-015-2608-3

Cited by 21 publications

(27 citation statements)

References 48 publications

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“…The Freshwater Ecoregions from Abell et al () are shown and the names of these freshwater ecoregions in the western part of Turkey are given as abbreviations: LD Dniester‐Lower Danube, Th Thrace, NA Northern Anatolia, CA Central Anatolia, WA Western Anatolia. Figure modified from Boll et al () [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Methodsmentioning

confidence: 99%

Size‐based interactions across trophic levels in food webs of shallow Mediterranean lakes

et al. 2017

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Body size is a key trait of an organism which determines the dynamics of predator–prey interactions. Most empirical studies on the individual size distribution of the aquatic community have focused on the variations in body size of a single trophic level as a response to certain environmental variables or biotic factors. Few studies, however, have evaluated how individual size structure is altered simultaneously across interacting trophic levels and locations. Such comparative examinations of the size distribution in predator and prey communities may bring insight into the strength of the interactions between adjacent trophic levels. We assessed the potential predation effect of size‐structured predators (i.e. predation by individuals of different sizes) on prey size structure using data from 30 shallow Turkish lakes spanning over five latitudinal degrees. We correlated size diversity and size evenness of predator and prey assemblages across the planktonic food web after accounting for the confounding effects of temperature and resource availability which may also affect size structure. We expected to find a negative relationship between size diversity of predators and prey due to the enhanced strength of top‐down control with increasing predator size diversity. We also hypothesised that competitive interactions for resources in less productive systems would promote a higher size diversity. We further expected a shift towards reduced size diversity and evenness at high temperatures. In contrast to our hypothesis, we found a positive correlation between size structures of two interacting trophic levels of the planktonic food web; thus, highly size‐diverse fish assemblages were associated with highly size‐diverse zooplankton assemblages. The size evenness of fish and phytoplankton assemblages was negatively and positively related to temperature, respectively. Phytoplankton size diversity was only weakly predicted by the resource availability. Our results suggest that size structure within a trophic group may be controlled by the size structure at adjacent trophic levels, as well as by temperature and resource availability. The positive relationship between the size diversity of fish and zooplankton suggests that higher diversity of the resources drives a higher size diversity of consumers or vice versa, and these effects are beyond those mediated by taxonomic diversity. In contrast, the size diversity and size evenness of phytoplankton are mainly influenced by physical factors in this region and perhaps in warm shallow lakes in general.

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Section: Methodsmentioning

confidence: 99%

Size‐based interactions across trophic levels in food webs of shallow Mediterranean lakes

et al. 2017

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“…Captured fish were identified to species level and measured (total length rounded to the nearest cm). For more details on the samplings and lake environmental characteristics, see Brucet et al (2013), Emmrich et al (2014), Boll et al (2016) and Mehner et al (2017).…”

Section: Data Setmentioning

confidence: 99%

“…The native/translocated/introduced status of each fish species was defined to at least a lake basin-specific level according to the literature (Filipsson 1994, Tammi et al 2003, Kottelat & Freyhof 2007, Brosse et al 2013, Dias et al 2014, Tarkan et al 2015, Boll et al 2016, Trochine et al 2017. For some ecoregions (Northern and Western Anatolia and Northern Baltic Drainages) information was available for each individual study lake.…”

Section: Accepted Ar Ticlementioning

confidence: 99%

“…All rights reserved.' m with mountains forming barriers between the river basins, may also have promoted speciation in Anatolian lakes along with a lack of major glaciation (Kosswig 1955, Boll et al 2016. In contrast, in central and northern European ecoregions, the fish fauna is impoverished as a result of climatic changes caused by periods of glaciations (Dynesius and Jansson 2000, Griffiths 2006, Lévêque et al 2008).…”

Section: Accepted Ar Ticlementioning

confidence: 99%

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Size diversity and species diversity relationships in fish assemblages of Western Palearctic lakes

et al. 2017

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Body size, coupled with abundance and taxonomy, may help to understand the mechanisms shaping community structure. Since the body size of fish is closely related to their trophic niche, size diversity (based on individual body size) of fish communities may capture intraspecific variations in fish trophic niches that are not detected by species diversity. Thus, the relationship between size diversity and species diversity may help to integrate variation at both intraspecific and interspecific levels. We studied the relationship between species diversity and size diversity as a measure of the degree of overlap in size among species and thereby the potential overlap in niches in a community. We hypothesized that the relationship between size diversity and species would be different across the European continent due to different levels of size overlap in fish communities. The data were derived from samplings of fish communities using standardised benthic gill nets in 363 lakes. At the continental scale, size diversity increased with species diversity; at the ecoregion scale, the slope of the relation changed across the continent, with the greatest mismatch occurring in northern Europe where communities comprised only one or a few species, but each of which exhibited a great range in size. There was an increase in slope towards the south with significant relations for four out of six ecoregions. The steeper size diversity‐species diversity slope at lower latitudes is attributable to a lower overlap in fish size and thus likely to finer niche separation. Our results also suggest that size diversity is not a strong surrogate for species diversity in European lake fish communities. Thus, particularly in fish communities composed of few species, measuring size diversity may help to detect potential functional variation which may be neglected by measuring species diversity alone.

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“…Non-native fishes are also changed selectivity of gear due to nature, dwelling behaviour and ecological condition [53][54][55]. Non-native fishes are helping for homogenization of faunas, increasing of diversity [56,57] and create pressure for native species [58][59][60].…”

Section: Malementioning

confidence: 99%

Size Selectivity of Active Fishing Gear: Changes in Size, Age and Growth of Cirrhinus Mrigala from the Ganga River, India

Ch¹,

Dwivedi²,

Mayank³

et al. 2017

Fish Aquac J

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Good knowledge of netting approach is essential for scientific and sustainable based fisheries management in lotic water bodies. The large sizes of fishes are more attract to fishers compared to small fishes. This type of fishing is very harmful for future stock and recruitment. 1.5 inch to 3.5 inch mesh size cast net was used in the Ganga River at Allahabad. Cirrhinus mrigala is mainly captured by drag net from the Ganga River, India. Studies were undertaken during March 2014 to February 2015 from the middle stretch of the Ganga River, India. 423 fish specimens (206 males and 217 females) were examined of Cirrhinus mrigala. An over-all picture of age, growth increment and age composition of C. mrigala has been obtained by the study of its scales. The age composition of C. mrigala varied from 0+ to 10+. On the basis of pooled sampled specimen in the total length ranges varied from 16.8 cm to 92.4 cm showed that the fish attained the mean length 30.24 cm, 48.02 cm, 61.50 cm, 70.31, 77.63, 81.84 cm, 85.30 cm, 88.57 cm, 90.15 cm, 91.8 cm in 1+, 2+, 3+, 4+, 5+, 6+, 7+, 8+, 9+ and 10+ age groups respectively. The growth increments in C. mrigala was recorded as 30.24 cm, 17.78 cm, 13.48 cm, 8.81 cm, 7.32 cm, 4.21 cm, 3.46 cm, 3.27 cm, 1.58 cm and 1.65 cm for 1+ to 10+ age groups, respectively. The maximum growth increment was recorded in 1st year and minimum in 9th year of life. The slow growth increment observed after third year may be attributed to the maturity attained after second year of life. It is well known that the growth potential is used for the gonad development. Drag netting is reducing the size of C. mrigala in the Ganga River.

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Fish assemblage and diversity in lakes of western and central Turkey: role of geo-climatic and other environmental variables

Cited by 21 publications

References 48 publications

Size‐based interactions across trophic levels in food webs of shallow Mediterranean lakes

Size‐based interactions across trophic levels in food webs of shallow Mediterranean lakes

Size diversity and species diversity relationships in fish assemblages of Western Palearctic lakes

Size Selectivity of Active Fishing Gear: Changes in Size, Age and Growth of Cirrhinus Mrigala from the Ganga River, India

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