Population structure and some growth properties of chub Squalius cephalus (Linnaeus, 1758) in Devres Stream of Kızılırmak River, Turkey

2017 ◽  
Vol 5 (3) ◽  
pp. 11 ◽  
Author(s):  
Semra Benzer ◽  
Ali Gül
Keyword(s):  
Body Weight ◽  
Population Structure ◽  
Condition Factor ◽  
Fork Length ◽  
Von Bertalanffy ◽  
Growth Properties ◽  
Growth Equations ◽  
Squalius Cephalus

This study describes the population structure, growth and condition factor of chub (Squalius cephalus) in Devres Stream of Kızılırmak River caught between June 2010 and June 2011. S. cephalus individuals ranging between I and VI years old were caught from Devres Stream. Studied individuals were between I and VI years old and their sex was determined as 51.67% male and 48.33% female. The fork length and body weight ranged from 8.79 – 19.64 cm and 9.73 – 126.60 g respectively. The von Bertalanffy growth equations were found: Lt = 27.163 [1 – e–0.159 (t+1.47)] for females and Lt = 27.078[1 – e–0.160 (t+1.46)] for males; Wt = 286.14 [1 – e–0.159 (t+1.47)]3.1049 for females and Wt = 284.43 [1 – e–0.160 (t+1.46)]2.9692 for males. The condition factor was calculated as 1.432 and 1.378 for females and males respectively.

scholarly journals The Variation of Several Biological Characteristics of the Chub, Squalius cephalus (L., 1758), in the Orenler Dam Lake, Northwest Anatolia, Turkey

2012 ◽  
Vol 4 (3) ◽  
pp. 27-32 ◽  
Author(s):  
Sait BULUT ◽  
Ramazan MERT ◽  
Muhsin KONUK ◽  
Beklan ALGAN ◽  
Ali ALAŞ ◽  
...  
Keyword(s):  
Condition Factor ◽  
Growth Parameters ◽  
Fork Length ◽  
Biological Characteristics ◽  
Von Bertalanffy ◽  
Calculated Length ◽  
Weight Relationship ◽  
Average Condition ◽  
Squalius Cephalus

In the present study, several growth parameters of 338 Squalius cephalus (L., 1758) specimens collected from the Orenler dam lake (Turkey) between July 2005 and June 2006 were studied. The population comprised 50.74% males, 46.29% females, and 2.97% males+females. In the examined samples, the age of females and males ranged from I to VII and I to VI, respectively. The fork length and weight of females were 14.7-38.0 cm and 40.68-27.0 g, respectively; these values were 16.3-33.7 cm and 57.7-560.0 g, respectively, for males. The age-length and age-weight relationships at time t were calculated by the von Bertalanffy equation for females, and the following results were obtained: Lt = 37.12[1–e–0.36(t–(–0.96))], Wt = 775.6[1–e–0.36(t–(–0.96))]3.27, Lt = 43.59[1–e–0.3356(t–(–0.719))], and Wt = 1123.2[1–e–0.3356(t–(–0.719))]3.08. The calculated length-weight relationship was W = 0.36L3.27 for females and W = 0.03356L3.08 for males. The average condition factor was 1.412 for females and 1.284 for males. Consequently, in the Orenler dam lake, S. cephalus grows very well according to the study’s results.

scholarly journals Population Structure and Some Growth Properties of Gibel Carp (Carassius gibelio) in a Mesotrophic Lake

2016 ◽  
Vol 8 (3) ◽  
pp. 286-291 ◽  
Author(s):  
Hakki DERELI ◽  
Ezgi DİNÇTÜRK
Keyword(s):  
Population Structure ◽  
Trophic Status ◽  
Gibel Carp ◽  
Trophic State Index ◽  
Von Bertalanffy ◽  
Total Length ◽  
Carassius Gibelio ◽  
Mesotrophic Lake ◽  
Growth Properties ◽  
Lake Beysehir

The hereby study investigated gibel carp (Carassius gibelio) in a mesotrophic lake (Lake Beyşehir, Turkey) from April 2013 to March 2014, in order to outline population structure and some growth properties of the species. Two water quality variables (Chlorophyll-a, Trophic State Index (TSI)) were detected seasonally to define trophic status of the lake. Length and weight distributions, length - weight relationship, sex ratio, gonadosomatic index (GSI), condition factor (CF) and von Bertalanffy equation were calculated for C. gibelio sampled monthly. Trophic status of the lake was defined as mesotrophic. Total length and weight of C. gibelio samples was determined in the range of 8.5 and 28.4 cm and 15 and 408 g, respectively. Mean total length and weight of individuals were calculated as 17.5 ± 2.37 cm and 88.6 ± 39.02 g, respectively. There was a negative allometry between length and weight for C. gibelio. The fish samples were composed of 52% females and 48% males, between II and VII years old. Spawning period of the species occurred between April and June after GSI values reached their maximum in March. The CF values were validated between 1.5-1.7 besides the mean rate of females and males were 1.6 and 1.5, respectively. The parameters of von Bertalanffy equation were calculated as L∞: 19.8 cm, W∞: 652.9 gr, k: 0.934. In conclusion, C. gibelio has almost lost the economic value since the individuals are smaller than market size (≥ 250 g), probably due to lack of nutrients/mesotrophic situation of Lake Beyşehir.

scholarly journals Size Structure, Growth Pattern, And Condition Factor Of Red Lolosi Fish (Caesio chrysozona, Cuvier, 1830) From The Bay Of Ratatotok Subdistrict, Southeast Minahasa Tenggara District

2017 ◽  
Vol 5 (2) ◽  
pp. 162
Author(s):  
Rully Firmalinda Gobel ◽  
Jan W. S. F. Tamanampo ◽  
Rose O. S. E Mantiri
Keyword(s):  
Body Weight ◽  
Growth Pattern ◽  
Condition Factor ◽  
Size Structure ◽  
Fork Length ◽  
Male And Female ◽  
Total Length ◽  
Fishing Boat ◽  
Male Condition ◽  
Fish Samples

The research was conducted in December 2016 in Totok Bay, Ratatotok Subdistrict, with the aim to know the size structure, growth pattern and condition factor of red lolosi fish (Caesio chrysozona). It is expected that this research can provide basic information to monitor the presence of these fish in the future, especially in the territorial waters of Ratatotok. The name of red lolosi fish is a local name in North Sulawesi. Fish with the scientific name Caesio chrysozona is commonly found around the coral reefs and shallow rocky coastal waters. Data were collected in the field by taking a random sample of fish from the catch of fishermen who are still in a fishing boat. The number of fish samples taken to be analyzed were 66. Based on the measurement of 66 individuals of red lolosi, the structure size is as follows: male (51 head) with total length of 180 mm - 259 mm, length of fork 153 mm - 216 mm, and raw length 135mm - 200 mm. While body weight ranges from 71.38 gr - 217.18 grams and females (15 fish) with a total length range of 196 mm - 243 mm, fork length of 165 mm - 209 mm, and standard length of 149 mm - 185 mm. While body weight ranges from 110.22 gr - 193.99 gr. The growth pattern of red lolosi fish both male and female is a negative allometric growth pattern (b <3) where the length of fish increase faster than weight gain. The condition factor of each individual male and female varies with the value of the male condition factor ranging from 0.8094 - 1.2547 and females ranged from 0.9668 to 1.0281. Because the value of K ranged 1 then the conclusion is that male and female of red lolosi fish have a less flat shape. This causes the loss of weight of fish due to the influence of food, age, sex and gonad maturity. ABSTRAK Penelitian dilakukan pada bulan Desember 2016 di Teluk Totok Kecamatan Ratatotok, dengan tujuan untuk mengetahui struktur ukuran, pola pertumbuhan dan faktor kondisi dari ikan lolosi merah (Caesio chrysozona).  Ikan lolosi merah adalah nama lokal di Sulawesi Utara, dan ditemukan cukup berlimpah di  sekitar terumbu karang dan perairan dangkal yang berbatu-batu di Teluk TotokPengambilan sampel di lapangan  dilakukan dengan metoda sampling yaitu dengan cara mengambil sampel ikan secara acak dari hasil tangkapan nelayan yang masih berada dalam perahu nelayan.  Jumlah sampel ikan yang diambil untuk dianalisis sebanyak  66 ekor. Berdasarkan hasil penelitian terhadap 66 individu lolosi merah, diperoleh struktur ukuran sebagai berikut: jantan (51 ekor) dengan kisaran panjang total 180 mm - 259 mm,.  Sedangkan berat tubuh berkisar dari 71.38 gr – 217.18 gr,  dan betina (15 ekor) dengan kisaran panjang total 196 mm - 243 mm, Sedangkan berat tubuh berkisar dari 110.22 gr – 193.99 gr.  Pola pertumbuhan ikan lolosi merah baik jantan maupun betina adalah pola pertumbuhan allometrik negatif ( b < 3)  dimana pertambahan panjang ikan lebih cepat dari  pertambahan beratnya. Faktor kondisi setiap individu jantan dan betina bervariasi dengan nilai faktor kondisi jantan  berkisar 0.8094 - 1.2547 dan Betina berkisar 0.9668 - 1.0281.

scholarly journals Extirpation of a native population following a stocking program: genetic population structure and demographics of kokanee (Oncorhynchus nerka) in a large impounded watershed

2021 ◽  
Author(s):  
◽  
Paige Wilson
Keyword(s):  
Population Structure ◽  
Condition Factor ◽  
North Pacific Ocean ◽  
Oncorhynchus Nerka ◽  
Temporal Trends ◽  
Fork Length ◽  
Genetic Population Structure ◽  
Age At Maturity ◽  
Genetic Population ◽  
Native Populations

Kokanee, the non-anadromous life history form of Oncorhynchus nerka, use lacustrine habitat in watersheds draining into the north Pacific Ocean. Kokanee have also been widely introduced into reservoirs following impoundment of rivers due to the construction of dams. Locally-adapted subpopulations of Kokanee, however, should be identified and evaluated when implementing watershed-level management strategies. In Chapter 1, I examined fork length, condition factor, and age at maturity for Kokanee in the Williston watershed of northern British Columbia to identify potential spatial and temporal trends in demographic structure following a large-scale stocking program that occurred in the 1990s. Adult spawning Kokanee that were native to the reservoir and collected prior to stocking events were significantly larger and maintained higher condition factors than Kokanee stocked from the Columbia River sampled in any year after 1991. Introduced Kokanee sampled in 2018 and 2019 were the smallest spawners and were significantly smaller than all fish collected between 1989 and 2018; the condition factors of these fish were also significantly lower than native Kokanee and the first spawning cohorts of Columbia-origin fish. The average age at maturity did not change across spatial or temporal scales (3 yrs.). My results indicate an ongoing trend of decreasing spawner size and condition factor for Kokanee in the Williston Reservoir since introduction events in the early 1990s. In Chapter 2, I analyzed the genetic population structure of Kokanee in the Williston watershed, including from the reservoir before stocking Columbia-origin fish and native populations from headwaters of the Williston Reservoir: Thutade, Arctic, and Tacheeda Lakes. Using microsatellite markers, I identified that all fish collected from 2006 to 2019 were introduced Columbia-origin genotypes, and there was no evidence of genetic divergence by spawning location. Native populations in Arctic and Tacheeda Lakes remained entirely separate from the reservoir populations, and there was no indication of past or current introgression with introduced stock. I identified that native Williston Reservoir Kokanee diverged from the Thutade Lake population; as native Williston fish have not been sampled since 2000, it is likely that this population has been extirpated in the reservoir by the successful Columbia-origin lineage. My results highlight an unfortunate consequence of underinformed management practices that failed to recognize the native Williston Kokanee as a distinct population. Strategies that incorporate knowledge of subpopulations of Williston watershed Kokanee, such as genetic populations or reproductive ecotypes, should be prioritized to conserve locally-adapted genetic diversity.

scholarly journals Study of Morphometric Characteristics of Freshwater Putul, Botia lohachata in Kompo River of Bagmara, Rajshahi, Bangladesh

2020 ◽  
Vol 17 (1) ◽  
pp. 15-33
Author(s):  
Md Abdur Razzaq Joadder ◽  
Rabia Binta Siraz ◽  
Susen Roy ◽  
Syeda Nusrat Jahan ◽  
Dil Afroza Khanom ◽  
...  
Keyword(s):  
Body Weight ◽  
Sex Ratio ◽  
Condition Factor ◽  
Fork Length ◽  
Morphometric Characteristics ◽  
Chi Square ◽  
Body Depth ◽  
Frequency Distributions ◽  
Linear Relationships ◽  
Positive Correlations

This study described about the morphometric characteristics of Botia lohachata, collected from the Kompo River at Rajshahi , were studied for a period of four months from July to October 2014. Length frequency distributions, length-length relationships, length-weight relationship, sex ratio, Fulton's condition factor and fecundity of B. lohachata were studied in the present study. This is the maiden research conducted on B. lohachata in Bangladesh. The highest mean total lengths were 61.16±4.77 mm (combined sex), 63.80±4.79mm (female) and 58.17 ±3.30mm (male). Maximum 43.34% female fishes were belonging to the length category of 61-65 mm where as 61.41% male were belonging to 56-60 mm. Similar findings are also presented for standard length, fork length, body depth, dorsal length, pectoral length, pelvic length and anal length. Linear relationships were also studied among mentioned lengths. Strong positive correlations were observed in all cases. The highest mean body weight was weight 2.67±0.71g (October) in combined sex, this value was 3.10±0.59 in female (September) and 2.25±0.38g in male (September). Strong positive correlations were also observed between total length and body weight. Observed value of sex indicated that 54% specimens were female and remaining 46% were male. The value of chi square (x2) was 2.4 at 1 degree of freedom (p<0.005) strongly indicated that the observed sex ratio not differs significantly from the expected ratio (1:1).The Fulton’s condition factors In case of combined sexes, the highest condition factor 1.156±0.126 was recorded in month of October, female highest condition factor 1.190±0.136 and male highest condition factor 1.135±0.103. Journal of Science Foundation 2019;17(1):15-33

scholarly journals REPRODUCTIVE BIOLOGY OF THE MULLET LIZA FALCIPINNIS (VALENCIENNES, 1836) IN TWO AFRICAN COMPLEXS LAGOONS (EBRIÉ AND GRAND-LAHOU) (CÔTE D’IVOIRE)

2018 ◽  
Vol 6 (5) ◽  
pp. 114-127
Author(s):  
Ebram Luc Gervais ◽  
Soumaïla SYLLA ◽  
Tizié Thierry ZAN-BI ◽  
Boua Célestin ATSE
Keyword(s):  
Body Weight ◽  
Sex Ratio ◽  
Condition Factor ◽  
Gonadosomatic Index ◽  
Fork Length ◽  
Total Body Weight ◽  
Hepatosomatic Index ◽  
Spawning Period ◽  
Total Body ◽  
Monthly Variations

The reproduction of Liza falcipinnis were investigated in both lagoons (Ebrié and Grand-Lahou) from January 2006 to december 2007. 2162 specimens were examined (914 and 1248 respectively in Ebrié and Grand-Lahou lagoons). Fork length was taken to the nearest 1 mm, and total body weight (TW) and eviscerated body weight (EW) to the nearest 0.1 g. The gonads and the liver were then established removed, weighted to the nearest 0.001g. The reproduced period of Liza falcipinnis was established by analysing the temporal evolution of the frequency of the maturity stages and the monthly variations in the gonadosomatic index (GSI), the hepatosomatic index (HIS) and the condition factor (K). Sex ratio was established taking into account the sex determinations. The size at which 50 % of the specimens became mature (FL50) was estimated. The sex ratio (1:1.24) and (1:1.40) observed respectively in Ebrié and Grand-Lahou lagoons were in favour of females. The first sexual maturity size was 21.0 cm (FL) for males and 27.9 cm (FL) for females in Ebrié lagoon and 24.7 cm (FL) for males and 27.9 cm (FL) for females in Grand-Lahou lagoon. Liza falcipinnis spawns in lagoon and the spawning period ranged from December to April.

scholarly journals PÜLÜMÜR NEHRİ'NDE YAŞAYAN Acanthobrama marmid Heckel, 1843 POPULASYONUNUN BAZI BÜYÜME ÖZELLİKLERİNİN BELİRLENMESİ

2020 ◽  
Vol 15 (4) ◽  
pp. 121-133
Author(s):  
Ebru İfakat Özcan
Keyword(s):  
Condition Factor ◽  
Growth Parameters ◽  
Age Groups ◽  
Age Determination ◽  
Von Bertalanffy ◽  
Allometric Growth ◽  
Sex Distribution ◽  
Male Ratio ◽  
Growth Equations ◽  
Growth Features

In this study, some growth features have been investigated like sex distribution, length and weight relationship, age determination, von Bertalanffy growth parameters and condition factor of population Acanthobrama marmid Heckel, 1843 in Pülümür River. 276 samples examined during the study consisted of 157 females and 119 males and the female/male ratio was calculated as 1/0.758. It was determined that the total length and weight values varied between 7.8-21.1cm and 5.6-121.21 g in all individuals. The population has showed distribution between I-V age groups. Length-weight equation in were determined as W=0.0063L3.248 (R2=0.960) in females, W=0.0062L3.252 (R2=0.958) in males and W=0.0063L3.249 (R2=0.959) in all individuals. Positive allometric growth was observed for both sexes due to the “b” values were statistically different from 3. The von Bertalanffy growth equations were determined Lt=27.00 [1–e–0.247(t+0.876)] and Wt =249.66 [1-e–0.247(t+0.876)]3.248 for female, Lt=27.55 [1–e–0.232(t+0.952)] and Wt=280.02 [1–e–0.232(t+0.952)]3.252 for male, Lt=27.34 [1–e–0.238(t+0.916)] and Wt=261.55 [1–e–0.238(t+0.916)]3.249 for all individuals. Growth performance index (Ф') value was calculated as 2.250 for all individuals. Condition factor varies between 0.548-1.653 in female and 0.567-1.670 in male. It was observed that the value of the condition factor generally increased with age.

Genetic architecture of body weight, condition factor and age of sexual maturation in Icelandic Arctic charr (Salvelinus alpinus)

2011 ◽  
Vol 286 (1) ◽  
pp. 67-79 ◽  
Author(s):  
Eva Küttner ◽  
Hooman K. Moghadam ◽  
Skúli Skúlason ◽  
Roy G. Danzmann ◽  
Moira M. Ferguson
Keyword(s):  
Body Weight ◽  
Sexual Maturation ◽  
Genetic Architecture ◽  
Condition Factor ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Weight Condition

scholarly journals Growth and reproduction properties of endemic Capoeta kosswigi and Barbus ercisianus in the Deliçay Stream (Van, Turkey)

2021 ◽  
Vol 38 (3) ◽  
pp. 293-302
Author(s):  
Ataman Altuğ Atıcı ◽  
Ahmet Sepil ◽  
Fazıl Şen ◽  
Asude Çavuş
Keyword(s):  
Sexual Maturity ◽  
Condition Factor ◽  
Fork Length ◽  
Lake Van ◽  
Reproductive Characteristics ◽  
Lake Van Basin ◽  
Growth And Reproduction

In this study, the growth and reproductive characteristics of Capoeta kosswigi Karaman, 1969 and Barbus ercisianus Karaman, 1971, which are endemic to the Lake Van Basin, in Deliçay (Van) were investigated. A total of 309 C. kosswigi and 288 B. ercisianus specimens were caught by electrofishing between April and August 2018. The fork length of C. kosswigi and B. ercisianus ranged from 3.7-26.1 cm and from 4.3-22.7 cm, and the total weights ranged from 0.6-227.4 g and from 1.2-140.0 g, respectively. The most intensive catching was in C. kosswigi population of 5.0-6.9 (27.5%) cm and 0-19.9 (67.0%) g in the groups, and 12.0-13.9 (24.7%) cm and 0-9.9 (23.3%) g groups in B. ercisianus. Condition factor was determined as 1.305±0.008 (0.798-1.886) in C. kosswigi and 1.158±0.006 (0.864-1.559) in B. ercisianus. The length-weight relationships were calculated as W = 0.01435 × L2.952 (r2 = 0.996) for C. kosswigi and W = 0.01276 × L2.959 (r2 = 0.994) for B. ercisianus. The M:F ratio was calculated as 1:0.15 in C. kosswigi and 1:0.64 in B. ercisianus. It was established that C. kosswigi attained sexual maturity when they reached to 11 cm fork length for males, 18 cm fork length for females. Maturation of B.ercisianus individuals occurred at 9 cm fork length in males and 12 cm fork length in females. The spawning in C. kosswigi was observed from 1st week of May to 2nd week of July, and in B. ercisianus from 1st week of May to 1st week of August. It may be suggested that minimum catching size must be 20 cm fork length for C. kosswigi and 15 cm fork length for B. ercisianus.

Sign in / Sign up

Export Citation Format

Share Document