Interannual Variability of Fecundity and Egg Size of an Invasive Cyprinid,<i>Carassius gibelio</i>: Effects of Density-Dependent and Density-Independent Factors

Tarkan, Ahmet Nuri; Gaygusuz, Özcan; Tarkan, Ali Serhan; Gürsoy, Çiğdern; Acipinar, Hasan

doi:10.1080/02705060.2007.9664140

Cited by 9 publications

(5 citation statements)

References 14 publications

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“…Density‐independent factors can be more influential when growth is affected not only by biomass density but also directly by abiotic conditions (Lorenzen & Enberg 2001), and these circumstances are typically more commonly encountered in unstable or unfavourable environments (Haldane 1956), such as small fast‐flowing streams (Elliott 1989), spate rivers (Nunn et al. 2007) and impoundments (Tarkan et al. 2007).…”

Section: Discussionmentioning

confidence: 99%

Long‐term growth patterns in a pond‐dwelling population of crucian carp, Carassius carassius: environmental and density‐related factors

Tarkan¹,

Gaygusuz²,

Godard³

et al. 2011

Fisheries Management Eco

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Scale samples from crucian carp, Carassius carassius (L.), collected over a 10-year period from a population in an ornamental pond were used to examine patterns in growth as a function of environmental factors, including water temperatures. Back-calculated standard lengths (SL) at age differed between year classes in most cases. Annual SL increments were related to temperature and age using a non-linear growth model. Growth declined with increasing age, whereas annual SL increments increased with increasing water temperature. The best-fit model was with the total number of summer days when air temperature exceeded 20°C (using water temperature equivalents of air temperature). A growth model including water temperature, age, year class, relative condition and rainfall was a better fit than other models. Year-class strength was positively correlated with water degree-days, and year-class strength negatively affected annual SL increments. The results indicate that within a strong year class of crucian carp, the growth of individual fish is reduced compared with weak year classes, suggesting that density negatively affects growth in ponds where resources are limited. K E Y W O R D S : conservation, native species, non-linear growth, water temperature.

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Section: Discussionmentioning

confidence: 99%

Long‐term growth patterns in a pond‐dwelling population of crucian carp, Carassius carassius: environmental and density‐related factors

Tarkan¹,

Gaygusuz²,

Godard³

et al. 2011

Fisheries Management Eco

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“…They generally reproduce bisexually, but also occasionally through gynogenesis (Vetemaa et al 2005) Several aspects of the species C. gibelio were studied during various research projects in Turkey. For instance, its growth was determined by Emiroğlu (2008), the ecological impact was established by Gaygusuz et al (2007), the feeding regime was investigated by Yılmaz et al (2007), fecundity characteristics were researched by Tarkan et al (2007), length-weight relationships and reproduction were determined by Şaşı (2008) and distribution by Yerli et al (2014).…”

Section: Introductionmentioning

confidence: 99%

Growth parameters of invasive gibel carpCarassius gibelio(Bloch, 1782) in Lake Marmara (Turkey)

İlhan

Sarı

Kurtul

2020

Oceanological and Hydrobiological Studies

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The objective of this study was to determine growth parameters, such as age–length and length–weight relationships, as well as condition factors and sex ratio, of the Carassius gibelio (Bloch, 1782) population in Lake Marmara (western region of Turkey), which is one of the most important fishing areas. Fish were caught on a monthly basis by gillnets and trammel nets (mesh size 10–50 mm) between March 2012 and February 2013. A total of 1058 specimens (809 females and 249 males) were examined. The female–male ratio was 1:0.31. The maximum age was determined as VI and V for females and males, respectively. The total length of females and males ranged from 10.0 to 27.5 cm and from 10.2 to 24.0 cm, respectively. Their weight varied from 17.1 to 378.4 g and from 17.7 to 244.9 g, respectively. Length–weight relationship parameters were a = 0.014 and b = 3.040 for females and a = 0.015 and b = 3.039 for males. Von Bertalanffy growth parameters of the C. gibelio population were as follows: L∞ = 35.86 cm, k = 0.189 year−1, t0 = −1.238 years. Minimum and maximum condition factors were 1.56 for females in October and 1.82 in May and 1.67 for males in September and 1.94 in January.

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“…Because of the positive correlation between fish growth and environmental quality (Bister et al, 2000), relative weight could be an easy and powerful tool for identifying ecological changes, such as the incidence of phenomena of intraspecies competition (Johnson, 1992), impact of nonnative species Giannetto et al, 2012b), or environmental disturbances (Gabelhouse, 1991;Hubert et al, 1994;Liao et al, 1995). Considering that S. pursakensis is commonly found in reservoirs, which are considered as unfavorable and variable environments for fish species (Tarkan, 2007;Emiroğlu et al, 2012), monitoring ecological changes via simple and effective tools such as relative weight is useful.…”

Section: Discussionmentioning

confidence: 99%

Development of empirical standard weight equation for Pursak chub Squalius pursakensis, an endemic cyprinid species of Northwest Anatolia

Sülün¹,

Başkurt²,

Emiroğlu³

et al. 2014

Turk J Zool

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Indices of condition enable the evaluation of the well-being of fish, with the assumption that heavier fish of a given length are in a better condition. Relative weight (W r ) is one of these indices; it is calculated by comparing the actual weight of a specimen with the ideal weight of a specimen in good physiological condition of the same length from the same species, i.e. standard weight (W s ). In this research, length and weight data over the distribution range for Pursak chub Squalius pursakensis, an endemic species distributed in the Sakarya and Porsuk drainages in Northwest Anatolia (Turkey), were used to compute a W s equation by means of the empirical percentile (EmP) method. The W s equation obtained was log 10 W s = -4.657 + 2.614 log 10 TL + 0.127 (log 10 TL) 2 , and the total length range of application was 80-340 mm. Since the EmP W s equation was not influenced by length variation, the use of this equation to compute the relative weight (W r ) for S. pursakensis throughout its area of distribution is suggested.

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Interannual Variability of Fecundity and Egg Size of an Invasive Cyprinid,Carassius gibelio: Effects of Density-Dependent and Density-Independent Factors

Cited by 9 publications

References 14 publications

Long‐term growth patterns in a pond‐dwelling population of crucian carp, Carassius carassius: environmental and density‐related factors

Long‐term growth patterns in a pond‐dwelling population of crucian carp, Carassius carassius: environmental and density‐related factors

Growth parameters of invasive gibel carpCarassius gibelio(Bloch, 1782) in Lake Marmara (Turkey)

Development of empirical standard weight equation for Pursak chub Squalius pursakensis, an endemic cyprinid species of Northwest Anatolia

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