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    P1: Ichthyology I

    2021-07-26   16:00 - 18:00

    To view the posters go to https://epostersonline.com/jmih2021/. You will be able to chat one-on-one during the Monday poster session, the e-poster platform.



    1.  16:00  Description of the Case of a Swim Bladder Torsion in Goldfish (Carassius auratus, Linnaeus 1758). Andreia Garcês*, Inno- Serviços Veterinários, Department of Microbiology; Luis Sousa, Wildlife Rehabilitation Centre of University of Trás-os-Montes and Alto Douro (CRAS-UTAD); Roberto Sargo, Wildlife Rehabilitation Centre of University of Trás-os-Montes and Alto Douro (CRAS-UTAD); Filipe Silva, Wildlife Rehabilitation Centre of University of Trás-os-Montes and Alto Douro (CRAS-UTAD); Isabel Pires, Wildlife Rehabilitation Centre of University of Trás-os-Montes and Alto Douro (CRAS-UTAD)   andreiamvg@gmail.com

    In this case report, the authors report a case of a swim bladder torsion at the ductus communicans in a 15-year-old goldfish (Carassius auratus, Linnaeus 1758). The lesion was observed at post-mortem exam. Its aetiology is not yet well understood, and in the presented case could have resulted of the conjugation of different factors: previously traumas, postural changes, and the corporal condition of the animal. Torsions in swim bladders are not common and still very poorly documented. This report is also a reinforcement of the importance of the post-mortem exam in these animals.


    2.  16:00  Reproductive ecology of Cachegua Trachelyopterusinsignis in the Cienaga de Ayapel, Colombia. Luis E. López-Álvarez, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Yhan C. Benavides-Morales, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; William A. Pérez-Doria, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Glenys Tordecilla-Petro, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Jesús Vargas-González, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Milena M. Arteaga-Vega, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Fredys F. Segura-Guevara, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Charles W. Olaya-Nieto*, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba   colaya@correo.unicordoba.edu.co

    Reproductive ecology ofCachegua Trachelyopterus insignisin the Cienaga de Ayapel,San JorgeRiver Basin, Colombia, was studied. Between January and December 2013,403 individualswith totallength (TL) and total weight (TW) ranged between11.8-27.1 (19.0 ± 2.7) cm and 17.0-250 (86.4 ± 38.3) gramswere collected, and sex ratio, maturity index, spawning season, length at first maturity, ovocites’s diameter and fecundity were estimated. It was found 274 females and 129 males, with sex ratio females: males of 2.1:1 and sexual dimorphism to size, length at first maturity was estimated in 19.1 cm TL for both sexes, oocytes’s average diameter were 1460 µm and average fecundity by spawning was estimated at 1288oocites.The results achieved in this study suggest that Cachegua is a fish that has partial spawnings, with prolonged spawning seasonthat extends throughout the yearfrom March to December, with largeoocytes and low average fecundity per spawning related to ovaries´weight.


    3.  16:00  Reproductive biology of Nicuro Pimelodus yuma in the San Jorge River Basin, Colombia. Angélica C. Flórez-Guerra, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Javier J. Nieves-López, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Ángel L. Martínez-González, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Fredys F. Segura-Guevara, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Charles W. Olaya-Nieto, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Glenys Tordecilla-Petro*, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba   glenys_tordecilla@hotmail.com

    To study the reproductive biology of Nicuro Pimelodus yuma in the San Jorge River Basin, Colombia, 404 individualswith totallength (TL) ranged betweenentre 14.9-30.6 (21.3 ± 2.4)cm and total weight (TW) ranged between27.0-243.0 (80.9 ± 29.4)grams were collected. The gonads were placed in Gilson solution, the Vazzoler scale was applicated and sex ratio, maturity index, spawning season, length at first maturity, ovocites’s diameter and fecundity were estimated. It was found 292 females y 112 males, with mean catch length of 21.4 cm TL. The sex ratio female: male was 2.6:1, with sexual dimorphism to size, length at first maturity was 20.5 cm TL, the oocytes´s diameter measured 643 μm and average fecundity was 16422. The results obtained suggest that Nicuro is a fish with sex ratio different than expected, with synchronous oocyte development in two groups, an annual spawning with a reproductive period that extends from March to October related to the water level of the San Jorge River, small oocytes and high fecundity associated with the ovaries´weight.


    4.  16:00  Reproductive ecology of Mojarra amarilla Caquetaia kraussii in the Cienaga Grande de Lorica, Colombia. Milena M. Arteaga-Vega*, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Andrea M. Espitia-Galvis, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Jesús Vargas-González, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Ángel L. Martínez-González, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Fredys F. Segura-Guevara, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Charles W. Olaya-Nieto, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba   armi.1202@hotmail.com

    Reproductive ecology of Mojarra amarilla Caquetaia kraussii in the Cienaga Grande de Lorica, Colombia, was evaluated. Between January and December 2017,427 individualswith totallength (TL) and total weight (TW) ranged between13.1-21.0 (16.4 ± 1.4)cm and34.3-150.5 (81.5 ± 19.5)gramswere collected. The Vazzoler scale was used for the ovaries and sex ratio, maturity index, spawning season, length at first maturity, ovocites’s diameter and fecundity were estimated. We found 203 females and 224 males, with mean catch length of 16.7 cm TL. The sex ratio females: males was 1.1:1 with sexual dimorphism to size, length at first maturity was estimated in 16.3 cm TL for both sexes, oocyte’s average diameter were 1250 µm and average fecundity by spawning estimated was 2426 oocytes.The results achieved in this study suggest that Caquetaia kraussiipresents oocyte development in more than two groups,with partial spawnings, prolonged spawning seasonthat extends throughout the yearfrom March to December,independent of water level in the Cienaga Grande de Lorica,with largeoocytes, low fecundity per spawningassociated with their weight and overfishing problems.


    5.  16:00  The Stream Leucisid Luxilus chrysocephalus(Striped Shiner) Spawns in March to May in North Alabama. Bruce Stallsmith*, University of Alabama in Huntsville   stallsb@uah.edu

    Like many southeastern stream leucisids, Luxilus chrysocephalus,the Striped Shiner, has been observed to spawn in the Spring. I am interested in examining the timing of spawning and reproductive effort of females of this species in the Flint River of Madison County, Alabama. Monthly collections of the species were made in calendar years 2014 and 2015, resulting in 654 fish collected. I report several measures of reproductive effort including gonadosomatic index (GSI), average oocytes per mature female, and average clutch size (oocytes that are fully mature or nearly so). Oocyte counts were made by separating all oocytes from both ovaries. Data show that the spawning season was March – May in 2014 and April – May in 2015, with a peak in April both years. In 2014 the average number of maturing oocytes was 2,970 in March, 4,280 in April, and 1,719 in May while average clutch was 450 in March, 1,438 in April, and 1,145 in May. In 2015 the average number of maturing oocytes was 1,440 in March, 1,742 in April, and 1,842 in May, with an average clutch size of 1,143 in April and 1,057 in May. The relative numbers of maturing versus clutch oocytes shifted from mostly maturing oocytes in March to mostly clutch oocytes in May. Observed differences in reproductive output in two consecutive years are likely the result of more rain and colder temperatures in 2015. Striped Shiner reproduction is in the middle of the sequence of other observed leucisids in the Flint River.


    6.  16:00  Length–Weight relationship of Nicuro Pimelodus yuma in the San Jorge River Basin, Colombia. Yulieth E. González-Burgos, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Jesús Vargas-González Jesús Vargas-González, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Fredys F. Segura-Guevara, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Glenys Tordecilla-Petro, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Charles W. Olaya-Nieto, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Ángel L. Martínez-González*, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba   angelmartinezg@correo.unicordoba.edu.co

    The length–weight relationshipofNicuro Pimelodus yumacollected in the San Jorge River Basin, Colombia, was estimated.The length-weight relationship andcondition factor wereestimated with the equation TW = a TLb andK=TW/TLb, respectively.The size ranged between19.1-30.2 (24.0 ±1.5)cm TL, the total weight between68.0-232.0 (124.5 ± 23.3)grams,and the mean length in the catch estimated was 24.1 cm TL. Length-weight relationship estimatedwasTW =0.038 (± 0.10) TL2.55 (± 0.07),n =1394, r =0.86, where the condition factor ranged between 0.020 (June and August), high waters, and 0.079 (February), low waters and four times higher; although no significant statistical differences were found. The monthly growth coefficient ranged between 2.31 (February) and2.76(August), being negative allometric for the study year, with statistically significant differences. The information analyzed suggests that Pimelodus yuma is a migratory species of small size, better condition or welfare state in low waters, negative allometric growth and strong correlation between the condition factor and the hydrological cycle of the San Jorge River.


    7.  16:00  Length–Weight relationship of Morrúa Geophagus steindachneri in the Ciénaga de Betancí, Sinu River System. Diana P. Jiménez-Castillo, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Mario A. Peña-Polo, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Ángel L. Martínez-González, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Jesús Vargas-González, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Glenys Tordecilla-Petro, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Fredys F. Segura-Guevara Fredys F. Segura-Guevara*, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba; Charles W. Olaya-Nieto, Fishery Biology Research Laboratory-FBRL, Department of Aquatic Sciences. University of Cordoba   ffsegura@correo.unicordoba.edu.co

    The length-weight relationship (LWR) of Morrúa Geophagus steindachneri during an annual cycle in the Cienaga de Betancí, Sinú River Basin, Colombia, was estimated. LWR and condition factor were estimated with the equation TW = a*TL and k=TW/TL, respectively. The size ranged between 6.5-16.3 (9.9 ±1.5) cm TL, the total weight between 4.0-76.0 (19.3 ± 9.4) grams, and the mean length in the catch was 10.0 cm TL. LWR was TW =0.017 (± 0.06) TL3.04 (± 0.06),r =0.98, n =431, where the growth coefficient was isometric, oscillating between 2.29 in high waters (June) and 3.15 in low waters (December), with statistically significant differences; while the condition factor ranged from 0.013 in low waters (December) and 0.093 in high waters (June), where it was seven times higher, although no significant statistical differences were found. The results obtained suggests that Geophagus steindachneri is a small fish with isometric growth, and better welfare state in high waters, where there is a greater food supply in the study area.




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