Influence of Longitudinal Fragmentation on Length–Weight Relationships of Fishes in the Someșul Cald River, Romania
Abstract
1. Introduction
2. Materials and Methods
2.1. Study Area and Longitudinal Fragmentation
2.2. Environmental Characteristics
2.3. Fish Sampling and Body Measurements
2.4. LWR, Relative Condition Factor Kn, and Fulton Condition Factor K
2.5. Statistical Analysis
3. Results
3.1. Study Area, Longitudinal Fragmentation, and Environmental Characteristics
3.2. Fish Sampling (Inclusion and Exclusion Criteria)
- The species was present in both river sections (T1 and T2), and the number of individuals from each river section was ≥3. In this category, six species were observed: Squalius cephalus, Salmo trutta, Phoxinus phoxinus, Eudontomyzon danfordi, Cottus gobio, and Barbus carpathicus.
- The species was present in both river sections (T1 and T2), and the number of individuals from one of the sections was <3; while in the other station, the number of individuals was >3. In this category, two species were observed: Thymallus thymallus and Barbatula barbatula.
- The species was present in both river sections, and the number of individuals was <3 in each river section. Also, the sum of individuals (T1 + T2) was <3. In this category, one species was observed: Cobitis elongatoides.
- The species was present only in one of the river sections, and the number of observed specimens was <3. In this category, three species were observed: Salmo labrax, Rutilius rutilus, and Perca fluviatilis.
3.3. LWRs, Relative Condition Factor Kn, and Fulton’s Condition Factor K
3.3.1. LWRs
3.3.2. Relative Condition Factor Kn
3.3.3. Fulton’s Condition Factor K
4. Discussion
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Family | Species | Individual River Sections | Combined River Sections | |
---|---|---|---|---|
T1 | T2 | T1 + T2 | ||
Petromyzontidae | E. danfordi | ISO | s. ISO | ISO |
Cyprinidae | B. carpathicus | ISO | ISO | ISO |
Leuciscidae | P. phoxinus | ALLO+ | ISO | ISO |
S. cephalus | ALLO+ | ALLO+ | ALLO+ | |
R. rutilus | absent | n too small | n too small | |
Cobitidae | C. elongatoides | n too small | n too small | n too small |
Nemacheilidae | B. barbatula | s. ISO | n too small | s. ISO |
Salmonidae | S. labrax | absent | n too small | n too small |
S. trutta | ISO | ALLO+ | ALLO+ | |
T. thymallus | n too small | ALLO+ | ALLO+ | |
Cottidae | C. gobio | ALLO+ | ISO | ISO |
Percidae | P. fluviatilis | absent | n too small | n too small |
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Uiuiu, P.; Constantinescu, R.; Păpuc, T.; Muntean, G.-C.; Matei-Lațiu, M.C.; Becze, A.; Cocan, D.; Lațiu, C.; Martonoș, C.O. Influence of Longitudinal Fragmentation on Length–Weight Relationships of Fishes in the Someșul Cald River, Romania. Fishes 2024, 9, 420. https://doi.org/10.3390/fishes9100420
Uiuiu P, Constantinescu R, Păpuc T, Muntean G-C, Matei-Lațiu MC, Becze A, Cocan D, Lațiu C, Martonoș CO. Influence of Longitudinal Fragmentation on Length–Weight Relationships of Fishes in the Someșul Cald River, Romania. Fishes. 2024; 9(10):420. https://doi.org/10.3390/fishes9100420
Chicago/Turabian StyleUiuiu, Paul, Radu Constantinescu, Tudor Păpuc, George-Cătălin Muntean, Maria Cătălina Matei-Lațiu, Anca Becze, Daniel Cocan, Călin Lațiu, and Cristian Olimpiu Martonoș. 2024. "Influence of Longitudinal Fragmentation on Length–Weight Relationships of Fishes in the Someșul Cald River, Romania" Fishes 9, no. 10: 420. https://doi.org/10.3390/fishes9100420
APA StyleUiuiu, P., Constantinescu, R., Păpuc, T., Muntean, G.-C., Matei-Lațiu, M. C., Becze, A., Cocan, D., Lațiu, C., & Martonoș, C. O. (2024). Influence of Longitudinal Fragmentation on Length–Weight Relationships of Fishes in the Someșul Cald River, Romania. Fishes, 9(10), 420. https://doi.org/10.3390/fishes9100420